pcbsxlzh-cnGoodspeed Rss10Fri, 09 Jan 2009 03:01:07 GMTPCB抄板是如何制造出来的呢？Tue, 04 Nov 2008 15:09:03 GMThttp://www.sichinamag.com/blog/pcbsxl/40120/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28.1pt; TEXT-ALIGN: center; mso-char-indent-count: 2.0" align="center"><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: Arial">PCB</span></b><b style="mso-bidi-font-weight: normal"><span style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial">抄板是如何制造出来的呢？</span></b><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: Arial"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></b></p> <p style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 18pt; TEXT-ALIGN: center; mso-char-indent-count: 2.0; mso-line-height-rule: exactly" align="center"><font face="宋体">本文出自：</font><span lang="EN-US"><a href="http://www.pcbwork.net/"><span style="FONT-SIZE: 9pt; FONT-FAMILY: Arial"><font color="#3d7db3">http://www.pcbwork.net</font></span></a></span><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: Arial"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0" align="left"><span style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: Arial">我们打开通用电脑的健盘就能看到一张软性薄膜（挠性的绝缘基材），印上有银白色（银浆）的导电图形与健位图形。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0" align="left"><span style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: Arial">因为通用丝网漏印方法得到这种图形，所以我们称这种<span lang="EN-US">pcb</span>板为挠性银浆<span lang="EN-US">pcb</span>板。而我们去电脑城看到的各种电脑主机板、显卡、网卡、调制解调器、声卡及家用电器上的<span lang="EN-US">pcb</span>抄板就不同了。它所用的基材是由纸基（常用于单面）或玻璃布基（常用于双面及多层），预浸酚醛或环氧树脂，表层一面或两面粘上覆铜簿再层压固化而成。这种<span lang="EN-US">pcb</span>覆铜簿板材，我们就称它为刚性板。再制成<span lang="EN-US">pcb</span>抄板，我们就称它为刚性印制线路板。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0" align="left"><span style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: Arial">单面有印制线路图形我们称单面印制线路板，双面有印制线路图形，再通过孔的金属化进行双面互连形成的印制线路板，我们就称其为双面板。如果用一块双面作内层、二块单面作外层或二块双面作内层、二块单面作外层的印制线路板，通过定位系统及绝缘粘结材料交替在一起且导电图形按设计要求进行互连的印制线路板就成为四层、六层印制电路板了，也称为多层印制线路板。现在已有超过<span lang="EN-US">100</span>层的实用抄板了。<span lang="EN-US"><br><a href="http://www.x5dj.com/pcbpcbsxl/" target=_blank><span lang="EN-US"><span lang="EN-US">抄板</span></span></a></span>的生产过程较为复杂，它涉及的工艺范围较广，从简单的机械加工到复杂的机械加工，有普通的化学反应还有光化学电化学热化学等工艺，计算机辅助设计<span lang="EN-US">CAM</span>等多方面的知识。而且在生产过程中工艺问题很多而且会时时遇见新的问题而部分问题在没有查清原因问题就消失了，由于其生产过程是一种非连续的流水线形式，任何一个环节出问题都会造成全线停产或大量报废的后果，<span lang="EN-US"><a href="http://pcbxiaoli.blog.zj.com/" target=_blank>pcb<span lang="EN-US"><span lang="EN-US">抄板</span></span></a></span>如果报废是无法回收再利用的，工艺工程师的工作压力较大，所以许多工程师离开了这个行业转到印刷线路板设备或材料商做销售和技术服务方面的工作。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0" align="left"><span style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: Arial">有关<span lang="EN-US">PCB</span>抄板详细资料见：<span lang="EN-US"><a href="http://pcbsxl01.blog.hexun.com/">http://pcbsxl01.blog.hexun.com/</a><o:p></o:p></span></span></p>http://www.sichinamag.com/blog/pcbsxl/40120/message.aspxPCB抄板技术资料 IC设计与软件PCB抄板是如何制造出来的呢？Tue, 04 Nov 2008 15:08:52 GMThttp://www.sichinamag.com/blog/pcbsxl/40119/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28.1pt; TEXT-ALIGN: center; mso-char-indent-count: 2.0" align="center"><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: Arial">PCB</span></b><b style="mso-bidi-font-weight: normal"><span style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial">抄板是如何制造出来的呢？</span></b><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: #333333; FONT-FAMILY: Arial"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></b></p> <p style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 18pt; TEXT-ALIGN: center; mso-char-indent-count: 2.0; mso-line-height-rule: exactly" align="center"><font face="宋体">本文出自：</font><span lang="EN-US"><a href="http://www.pcbwork.net/"><span style="FONT-SIZE: 9pt; FONT-FAMILY: Arial"><font color="#3d7db3">http://www.pcbwork.net</font></span></a></span><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: Arial"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0" align="left"><span style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: Arial">我们打开通用电脑的健盘就能看到一张软性薄膜（挠性的绝缘基材），印上有银白色（银浆）的导电图形与健位图形。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0" align="left"><span style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: Arial">因为通用丝网漏印方法得到这种图形，所以我们称这种<span lang="EN-US">pcb</span>板为挠性银浆<span lang="EN-US">pcb</span>板。而我们去电脑城看到的各种电脑主机板、显卡、网卡、调制解调器、声卡及家用电器上的<span lang="EN-US">pcb</span>抄板就不同了。它所用的基材是由纸基（常用于单面）或玻璃布基（常用于双面及多层），预浸酚醛或环氧树脂，表层一面或两面粘上覆铜簿再层压固化而成。这种<span lang="EN-US">pcb</span>覆铜簿板材，我们就称它为刚性板。再制成<span lang="EN-US">pcb</span>抄板，我们就称它为刚性印制线路板。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0" align="left"><span style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: Arial">单面有印制线路图形我们称单面印制线路板，双面有印制线路图形，再通过孔的金属化进行双面互连形成的印制线路板，我们就称其为双面板。如果用一块双面作内层、二块单面作外层或二块双面作内层、二块单面作外层的印制线路板，通过定位系统及绝缘粘结材料交替在一起且导电图形按设计要求进行互连的印制线路板就成为四层、六层印制电路板了，也称为多层印制线路板。现在已有超过<span lang="EN-US">100</span>层的实用抄板了。<span lang="EN-US"><br><a href="http://www.x5dj.com/pcbpcbsxl/" target=_blank><span lang="EN-US"><span lang="EN-US">抄板</span></span></a></span>的生产过程较为复杂，它涉及的工艺范围较广，从简单的机械加工到复杂的机械加工，有普通的化学反应还有光化学电化学热化学等工艺，计算机辅助设计<span lang="EN-US">CAM</span>等多方面的知识。而且在生产过程中工艺问题很多而且会时时遇见新的问题而部分问题在没有查清原因问题就消失了，由于其生产过程是一种非连续的流水线形式，任何一个环节出问题都会造成全线停产或大量报废的后果，<span lang="EN-US"><a href="http://pcbxiaoli.blog.zj.com/" target=_blank>pcb<span lang="EN-US"><span lang="EN-US">抄板</span></span></a></span>如果报废是无法回收再利用的，工艺工程师的工作压力较大，所以许多工程师离开了这个行业转到印刷线路板设备或材料商做销售和技术服务方面的工作。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0" align="left"><span style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-bidi-font-family: Arial">有关<span lang="EN-US">PCB</span>抄板详细资料见：<span lang="EN-US"><a href="http://pcbsxl01.blog.hexun.com/">http://pcbsxl01.blog.hexun.com/</a><o:p></o:p></span></span></p>http://www.sichinamag.com/blog/pcbsxl/40119/message.aspxPCB抄板技术资料 IC设计与软件印制电路板设计中手工设计和自动设计的比较Thu, 09 Oct 2008 10:22:04 GMThttp://www.sichinamag.com/blog/pcbsxl/37156/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">印制电路板设计中手工设计和自动设计的比较</span><span lang="EN-US"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></b></p> <p style="WORD-BREAK: break-all; TEXT-INDENT: 18pt; LINE-HEIGHT: 12pt; mso-char-indent-count: 2.0"><span style="FONT-SIZE: 9pt"><font face="宋体">采用自动的方法进衍印制电路板即<span lang="EN-US">PCB</span>抄板设计和生成布线图，以及<span lang="EN-US">PCB</span>抄板到一个什么样的程度，取决于很多因素。每一种方法都有它最合适的使用范围以供选择。<span lang="EN-US"><o:p></o:p></span></font></span></p> <p style="WORD-BREAK: break-all; LINE-HEIGHT: 12pt"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="宋体">1.</font></span><span style="FONT-SIZE: 9pt"><font face="宋体">手工设计和生成布线图</font><span lang="EN-US"><br></span><font face="宋体">　　对于简单的<span lang="EN-US">PCB</span>单面板和<span lang="EN-US"><a href="http://www.pcbwork.net/">PCB</a></span>双面板，用手工进行设计是首选的方法，它也可以成功地运用于复杂性比较高的电路的单一产品或小批量产品的生产。手工设计具有很高的机动性和人类所有可能的独创性。然而，对于高复杂度的数字电路板，特别是包含<span lang="EN-US">100 </span>个以上集成电路的板子，很难通过手工设计实现。手工方法在质量、时间以及所需的培训人员方面也都受到了限制。在世界范围内，很大比例的印制电路板的设计和布线图的生成仍然通过手工完成。完全的手工方法不需要任何投资，所以更多地被采用，尽管它可以实现的部分已变得越来越少，特别是在数字印制电路板即<span lang="EN-US">PCB</span>抄板的设计中。<span lang="EN-US"><o:p></o:p></span></font></span></p> <p style="WORD-BREAK: break-all; LINE-HEIGHT: 12pt"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="宋体">2. </font></span><span style="FONT-SIZE: 9pt"><font face="宋体">自动设计</font><span lang="EN-US"><br></span><font face="宋体">　　全自动印制电路板的设计和布线图的生成是非常有价值的，它要求标准化输入，具有少量的简单的实施规范。对于设计包含<span lang="EN-US">150 </span>个以上集成电路的高精度复杂的数字电路板以及难度极大的多基板而言，它是一个理想的工具。总的设计时间可以从几周减少到几天，并且可以得到一个几乎完美的结果。对于大量印制电路板即<span lang="EN-US"><a href="http://www.pcbwork.net/pcbcb.asp">PCB<span lang="EN-US"><span lang="EN-US">抄<span lang="EN-US">板</span></span></span></a></span>的设计而言，需要有一个严格的时间表，这是很重要的，同时要求调试和矫正达到最少，这就使<span lang="EN-US">CAD </span>时常成为首选的方法。布线图的自动绘制也比手工绘制或胶带粘贴方法具有更高的精确度。模拟印制电路板通常不使用自动设计，因为它不同于数字电路，大多数模拟印制电路板即<span lang="EN-US">PCB</span>抄板很难简化各种设计条件，很难生成一个直观而简单的实施规范表。<span lang="EN-US"><o:p></o:p></span></font></span></p> <p style="WORD-BREAK: break-all; LINE-HEIGHT: 12pt"><span style="FONT-SIZE: 9pt"><font face="宋体">　　<span lang="EN-US">CAD </span>设备的大量投资总是要求系统得到充分的利用。如果电路板中的集成电路数少于<span lang="EN-US">20 </span>个、离散元器件的数量超过<span lang="EN-US">50% </span>，或者只需要很少量的印制电路板，则使用<span lang="EN-US">CAD </span>几乎是没有效果的。<span lang="EN-US"><o:p></o:p></span></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板相关资料详见：</span><span lang="EN-US"><a href="http://pcbsxl01.blog.hexun.com/">http://pcbsxl01.blog.hexun.com/</a></span></p>http://www.sichinamag.com/blog/pcbsxl/37156/message.aspx IC设计与软件专家教你如何进行PCB抄板布局Fri, 19 Sep 2008 17:01:07 GMThttp://www.sichinamag.com/blog/pcbsxl/36082/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><b style="mso-bidi-font-weight: normal"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">专家教你如何进行<span lang="EN-US">PCB</span>抄板布局<span lang="EN-US"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></span></b></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 13.5pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-char-indent-count: 1.5" align="left"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">在<span lang="EN-US"><a href="http://www.ldpcb.com/">PCB<span lang="EN-US"><span lang="EN-US">抄板</span></span></a></span>设计中，<span lang="EN-US">PCB</span>布局是一个重要的环节。<span lang="EN-US">PCB</span>布局结果的好坏将直接影响布线的效果，因此可以这样认为，合理的<span lang="EN-US">PCB</span>布局是<span lang="EN-US">PCB</span>设计成功的第一步。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">&nbsp;&nbsp;&nbsp;PCB</span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">抄板布局的方式分两种，一种是交互式布局，另一种是自动布局，一般是在自动布局的基础上用交互式布局进行调整，在<span lang="EN-US">PCB</span>抄板布局时还可根据走线的情况对门电路进行再分配，将两个门电路进行交换，使其成为便于布线的最佳布局。在布局完成后，还可对设计文件及有关信息进行返回标注于原理图，使得<span lang="EN-US">PCB</span>抄板中的有关信息与原理图相一致，以便在今后的建档、更改设计能同步起来<span lang="EN-US">, </span>同时对模拟的有关信息进行更新，使得能对电路的电气性能及功能进行板级验证。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align="left"><b><span style="FONT-SIZE: 9pt; COLOR: green; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">考虑整体美观</span></b><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align="left"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">一个产品的成功与否，一是要注重内在质量，二是兼顾整体的美观，两者都较完美才能认为该产品是成功的。在一个<span lang="EN-US"><a href="http://pcbxiaoli.blogchinese.com/">PCB<span lang="EN-US"><span lang="EN-US">板</span></span></a></span>上，元件的布局要求要均衡，疏密有序，不能头重脚轻或一头沉。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align="left"><b><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: green; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">PCB</span></b><b><span style="FONT-SIZE: 9pt; COLOR: green; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">布局的检查</span></b><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> <o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore">1.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><a href="http://www.x5dj.com/pcbpcbsxl/">PCB<span lang="EN-US"><span lang="EN-US">印制板</span></span></a></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">尺寸是否与加工图纸尺寸相符？能否符合<span lang="EN-US">PCB</span>制造工艺要求？有无定位标记？<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore">2.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">元件在二维、三维空间上有无冲突？<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore">3.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">元件布局是否疏密有序，排列整齐？是否全部布完？<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore">4.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">需经常更换的元件能否方便的更换？插件板插入设备是否方便？<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore">5.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">热敏元件与发热元件之间是否有适当的距离？<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore">6.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">调整可调元件是否方便？<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore">7.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">在需要散热的地方，装了散热器没有？空气流是否通畅？<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore">8.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">信号流程是否顺畅且互连最短？<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore">9.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">插头、插座等与机械设计是否矛盾？<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 9.8pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore">10.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">线路的干扰问题是否有所考虑？<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></span></p>http://www.sichinamag.com/blog/pcbsxl/36082/message.aspx 检测与测量一分钱对于PCB设计师的重要性Mon, 01 Sep 2008 17:16:38 GMThttp://www.sichinamag.com/blog/pcbsxl/31590/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><b style="mso-bidi-font-weight: normal"><span style="FONT-SIZE: 15pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一分钱对于</span></b><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 15pt">PCB</span></b><b style="mso-bidi-font-weight: normal"><span style="FONT-SIZE: 15pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设计师的重要性</span></b><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 15pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></b></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一分钱，在现在物价飞涨的年代，早已经退出了货币交流的的历史舞台，成为财务意义上的最小计量单位。当年</span><span lang="EN-US">“</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">我在马路边，捡到一分钱</span><span lang="EN-US">”</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的童谣，不会再发生了，一分钱，已经买不了任何东西。</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一分钱，已经真的不值钱了吗？让我们来看年看电子物料的价格：一个</span><span lang="EN-US">0603</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的普通贴片电阻</span><span lang="EN-US">0.29</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分钱，一个</span><span lang="EN-US">0603</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</span><span lang="EN-US">104</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">电容</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分钱，一个贴片</span><span lang="EN-US">8550</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">三极管</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分钱，一个贴片</span><span lang="EN-US">4148</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">二极管</span><span lang="EN-US">4.6</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分钱</span><span lang="EN-US">……</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">这些元器件，都是以分来衡量，要是以元为单位衡量的话，你会看到前面有很多</span><span lang="EN-US">“0”</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，这样年来，结论是我们很多物料不值几个钱</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span lang="EN-US">&nbsp;&nbsp; </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">但是大家有没有想过另外一个事实：一个贴片电阻用上后后面的加工费是</span><span lang="EN-US">1.5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分钱，一个三极管的加工费是</span><span lang="EN-US">2.2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分钱，上面的物料就会变成一个贴片电阻的综全成本是</span><span lang="EN-US">1.79</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分钱，比电阻本身成本高</span><span lang="EN-US">6</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">倍；一个贴片电容的综合成本是</span><span lang="EN-US">2.5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分钱，比自身成本高</span><span lang="EN-US">2.5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">倍；一个贴片三极管的综合成本是</span><span lang="EN-US">7.2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分钱，比自身高</span><span lang="EN-US">1.44</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">倍；一个贴片二极管的综合成本是</span><span lang="EN-US">6.1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分钱，比自身成本高</span><span lang="EN-US">1.32</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">倍</span><span lang="EN-US">……</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">这样看来，是否感觉我们的物料在使用的时候，好像并不省钱？我在这里先下一个结论：别拿一分钱不当回事</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">让我慢慢地给大家说说一个电阻，一个电容怎么成了一回事。</span><span lang="EN-US">“</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">就几分钱的东西，多大的事啊</span><span lang="EN-US">”</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的这个观点继续保留，请看下面。</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">我们一款成熟热销的机器，一年好歹也有</span><span lang="EN-US">10</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">万的销量，有的还不止这个数目，我们做几个假设，还是上面的物料。每台机器节省一个贴片电阻，我们可以节省</span><span lang="EN-US">1790</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">元；少贴一个贴片电容，节省</span><span lang="EN-US">2500</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">元；删除一个贴片三极管，挽回</span><span lang="EN-US">7200</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">元；不用一个贴片二极管，节约</span><span lang="EN-US">6100</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">元，这些钱的数字，大家就有感觉了，大家看看，节省了那一样的物料，几个月下来，就相当你们自已的工资了</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所以啊，千万别拿一分钱不当回事，一个年产</span><span lang="EN-US">10</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">万的机器，很容易浪费了很多个</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">千元。我们怎么做法才能把一分钱当回事呢？下面我有几个建议：</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，电子源头的设计。如果你用好料，性能高，你就是高水平的电子工程师了吗？在我看来，这是垃圾电子工程师。真正的高水平，是使用最精简的方案，最廉价的物料，能够能达到相同的性能，或者得到满足客户需求的性能，这里选料是关键。电子工程师一般都是比较保守的，保守是件好事，但是很多保守，是建立在自已技术水平不够高的基础上。比如说滤波电容，是不是越多越好？理论上来讲是，而实际上呢？你少用一个</span><span lang="EN-US">104</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">贴片电容，系统就崩溃了吗？</span><span lang="EN-US">470uF</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">变成</span><span lang="EN-US">100uF</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，性能就求能接受了吗？这些事情，很多电子工程师未曾想过即使想过，也很少真正去抠过，再即使抠过，也因为求稳最后在</span><span lang="EN-US">BOM</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中还是使用大家所谓的经验参数。</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">BOM</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设计。为了适应很多客户需求，</span><span lang="EN-US">BOM</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中都是做了很多选取择的。问题就出现在这里，两种互斥功能的</span><span lang="EN-US">BOM</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">组件，用</span><span lang="EN-US">A</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">功能的时候，</span><span lang="EN-US">B</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">功能的所有物料是不是全部删除</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">干净呢？出</span><span lang="EN-US">BOM</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的时候，是否赚麻烦少删除几个物料呢？随便少删除几个物料，好多个</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">千元就得掏，而这个把关只有你设计师清楚的知道</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;3</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设计。能用两层板，不要用四层板；能用纸板，不要用玻纤板；能用工装制具加工，</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">都不要用</span><span lang="EN-US"><a href="http://www.lrpcb.cn/">PCB<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">板</span></span></a></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">挡边，</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是很昂贵的物料，我们经常因为设计时候考虑这个兼容那个兼容，把</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">板面积扩大；然后还考虑进度约束，把单面板设计成双面板；工厂加工为了省做制具的钱，要求</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">加</span><span lang="EN-US">7MM</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的挡锡条</span><span lang="EN-US">……</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">要知道这些改动图什么？两个字：方便。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">但这是拿钱来买方便，拿多少钱呢？一块键控板如</span><span lang="EN-US">60X30MM</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，单面板使用双面板后，拿</span><span lang="EN-US">3.5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">元钱来买方便，一条四层板的挡锡边更贵，一个月下来，几万元都来买了个方便，一个月几万元，我们可以请优秀的电子工程师，专门设计单面板，也可以购买大批工装制具</span><span lang="EN-US"> <br>&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">千万不要拿一分钱不当回事，节约成本，不是要求大家做多大的贡献，一下子能节约上百万元，一分钱一分钱地去思考，一分钱就真的成了那么回事，节约，就是另外一种创造利润的捷径，大家想想，要创造一个产品出来，增加收入，多困难的一件事情啊；对比要节约几个物料，同样的增加收入，容易多了。</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 11.25pt"><span lang="EN-US">“</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">节约成本</span><span lang="EN-US">”</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">体现了电子工程师的最高技术水平。要做到：天天想，夜夜想，节约成本细思量；去冗佘，去兼容，产品质不能变。</span> </p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以上内容不错哦，可以学习，看来以后我们龙人</span><span lang="EN-US"><a href="http://www.lrpcb.cn/">pcb<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">抄板</span></span></a></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">公司（我们主要提供</span><span lang="EN-US"><a href="http://www.pcb-ic.com/"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">抄板</span></span></a></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">pcb</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">改板，原理图，</span><span lang="EN-US"><a href="http://www.dmpcb.cn/">pcb<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">抄板</span></span></a></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US"><a href="http://www.pcbinf.com/"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">芯片解密</span></span></a></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">服务）也要开始节约这一分一分的成本了。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 11.25pt"><span lang="EN-US"><o:p>&nbsp;</o:p></span></p>http://www.sichinamag.com/blog/pcbsxl/31590/message.aspx IC设计与软件PCB板设计的八条黄金建议Thu, 21 Aug 2008 17:53:42 GMThttp://www.sichinamag.com/blog/pcbsxl/30665/message.aspx<table style="WIDTH: 288pt; BORDER-COLLAPSE: collapse" cellSpacing="0" cellPadding="0" width="384" border="0" x:str> <colgroup> <col style="WIDTH: 288pt; mso-width-source: userset; mso-width-alt: 12288" width="384"> <tbody> <tr style="HEIGHT: 14.25pt" height="19"> <td style="BORDER-RIGHT: #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 288pt; BORDER-BOTTOM: #d4d0c8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" width="384" height="19"><font face="宋体"></font></td></tr></tbody></table> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 15pt"><a href="http://www.pcb-ic.com/">PCB<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">板设计</span></span></a></span></b><b style="mso-bidi-font-weight: normal"><span style="FONT-SIZE: 15pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的八条黄金建议</span></b><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 15pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></b></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 115.5pt; mso-char-indent-count: 11.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">文章出自：</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><a href="http://www.dmpcb.cn/">http://www.dmpcb.cn</a><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">★</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">请提供板件的叠层结构说明，包括完成板厚、各层的芯板厚度、铜箔厚度、半固化片（</span><span lang="EN-US">Prepreg </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）厚度等。</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">★PCB板</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">各层上最好能标明层序，或在其它地方对应各层的文件名标明层序。</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">★</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">钻孔参数</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">请提供钻孔数据文件及孔径分类表，并标明孔的金属化情况；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">孔径分类越少越好，孔径宜大不宜小，公差要求也是宜大不宜小；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">尽量少用长孔，并在外形图上标明；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">最好在板件内对角设两个孔径为</span><span lang="EN-US">O2.5--O5.0mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">非金属化孔作为铣外形用；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">孔边缘距外形线一般应大于</span><span lang="EN-US">1mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">金属化孔直径一般不要超过</span><span lang="EN-US">6.35mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">钻金手指导线的钻孔直径不小于</span><span lang="EN-US">0.8mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">请清除重孔；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">金属化孔尽量不要设计在外形线上。</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">★</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">外形</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">制板资料请提供外形图，其尺寸应尽量避免与</span><span lang="EN-US">CAD</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">文件有异；</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇CAD</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">文件中线路图最好有外形线，且外形线保持与外形图一致；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">内圆角和铣槽在允许的情况下，尽量放大；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">外形公差在允许的情况下，尽量放大；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇V</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">形槽角度一般为</span><span lang="EN-US">30°</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，中间留厚度为板厚的</span><span lang="EN-US">1/3</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，厚度公差</span><span lang="EN-US">±0.10mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">金手指角度一般为</span><span lang="EN-US">30°</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">或</span><span lang="EN-US">45°</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，切削深度为</span><span lang="EN-US">0.7mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，公差为</span><span lang="EN-US">±0.20mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，金手指一侧最好不设计与金手指平行的突出处。</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">★PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">线路图</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在空间允许的情况下，孔边缘与铜箔距离最小</span><span lang="EN-US">15mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，内层线路和铜箔距外形线应</span><span lang="EN-US">≥20mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，外层线路和铜箔距外形线应</span><span lang="EN-US">≥15mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如无特别说明，内层无连线焊盘将被取消；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如设计中某一层是多层图形复合而成，请作特别说明；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">大铜面最好以</span><span lang="EN-US">≥12mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的粗线填实，以减少数据量，填实线宽度不要和板内其它线的宽度相同，以便补偿生产菲林线宽；如用网格填充大铜面，网格的单线宽度最好</span><span lang="EN-US">≥8mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，相应网格在</span><span lang="EN-US">8milX8mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以上，尽量不设计网格；</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">同一层布线时，应尽量使图形均匀分布在整个板面，孤立线要少，线宽能大尽量大。内外层工艺边尽量加铜点，铜点面积比例占该区域的</span><span lang="EN-US">1/2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">焊盘、花盘和隔离盘应尽量加大；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">非金属化孔不留焊盘或孔边至少留</span><span lang="EN-US">0.2mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">无铜区，如铜箔须留至孔遍</span><span lang="EN-US">,</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">请特别说明；</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">金手指一侧与金手指高度相同的范围内一般不设计要开绿油窗的焊盘（或其他形式的铜箔）。</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">金手指上方开绿油窗的孔其边缘至少离金手指</span><span lang="EN-US">1mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">内层线路距孔边缘至少</span><span lang="EN-US">0.40mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，外层线路距孔边缘至少</span><span lang="EN-US">0.25mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇SMT MARK</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">点加直径为</span><span lang="EN-US">3-4mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的保护环，环宽</span><span lang="EN-US">0.4-0.6mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，环盖阻焊剂，可避免测试点脱落。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">★</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">感光阻焊</span><span lang="EN-US">(</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">绿油图）</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">过孔尽量不开绿油窗，减少绿油上焊盘和露线的机率；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;</span><span style="mso-spacerun: yes">&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">间距较小的</span><span lang="EN-US">SMD</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">脚尽量整排开窗以方便绿油质量控制，如</span><span lang="EN-US">SMD</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">脚之间须印油，则两脚边缘间距至少</span><span lang="EN-US">0.25mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如没有提供绿油图而要求印绿油，则按焊盘或焊垫开绿油窗，镀金插脚整排开绿油窗；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">孔内要求塞油的其孔径应小于</span><span lang="EN-US">0.8mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，加工成本较高；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">阻焊图加字符其线宽最小</span><span lang="EN-US">8mil(</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">最好不在阻焊图加字符）。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">★</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">字符图</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">字符线宽一般为</span><span lang="EN-US">0.2mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">字符的尺寸能大则加大，一般字符高度为</span><span lang="EN-US">≥1.5mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，以保证字体清晰；</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">字符与喷锡、镀金或镀铜的表面最小距离为</span><span lang="EN-US">≥0.15mm</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，以保证字符不上其表面；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">出外形线的字符须移入板内应加说明，否则将被去掉。</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US">★</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">其它参数</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一般全板镀金的孔壁厚度为</span><span lang="EN-US">0.6mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，热风整平板件孔壁铜厚度为</span><span lang="EN-US">0.8mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">热风整平的铅锡厚度一般</span><span lang="EN-US">≥0.1mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，超过此标准制作难度很大，特别是大焊盘或铜面；</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">镀金插指的镀金厚度一般要求</span><span lang="EN-US">≥15u″</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，如要求</span><span lang="EN-US">≥40u″</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">则制作成本很高；</span><span lang="EN-US"> </span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>◇</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">单元尺寸太小的应考虑拼板出货（方便装配和</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">生产）。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p>&nbsp;</o:p></span></p>http://www.sichinamag.com/blog/pcbsxl/30665/message.aspxPCB设计技术资料 IC设计与软件PCB设计时如何正确使用磁珠Fri, 15 Aug 2008 15:25:50 GMThttp://www.sichinamag.com/blog/pcbsxl/29961/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><a href="http://www.pcb-ic.com/">PCB<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">设计</span></span></a></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时如何正确使用磁珠</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">正确地使用磁珠对于</span><b style="mso-bidi-font-weight: normal"><i style="mso-bidi-font-style: normal"><span lang="EN-US"><a href="http://www.pcb-ic.com/">PCB<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">设计</span></span></a></span></i></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来讲有着举足轻重的作用，下面就让我们一起来探讨如何正确的使用磁珠，先介绍一下我们公司</span><span lang="EN-US">-</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">深圳龙人</span><b style="mso-bidi-font-weight: normal"><i style="mso-bidi-font-style: normal"><span lang="EN-US"><a href="http://pcblab.xinwen520.net/">pcb<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">抄板</span></span></a></span></i></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">公司是国内一家专业的</span><span lang="EN-US">pcb</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板公司，能根据客户的需求</span><span lang="EN-US">,</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">提供无论单</span><span lang="EN-US">,</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">双面</span><span lang="EN-US">,</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">多层板</span><span lang="EN-US">,</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">高频板等的</span><b style="mso-bidi-font-weight: normal"><i style="mso-bidi-font-style: normal"><span lang="EN-US"><a href="http://www.pcbwork.net/"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">抄板</span></span></a></span></i></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板</span><span lang="EN-US">,PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">改板</span><span lang="EN-US">,PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设计</span><span lang="EN-US">, PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">转原理图</span><span lang="EN-US">,BOM</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表制作</span><span lang="EN-US">,</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">样机制作，</span><span lang="EN-US">IC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">解密，芯片解密及硬件调试服务。详情：</span><b style="mso-bidi-font-weight: normal"><i style="mso-bidi-font-style: normal"><span lang="EN-US"><a href="http://www.dmpcb.cn/">http://www.dmpcb.cn</a></span></i></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，电话：</span><span lang="EN-US">0755-83662100<span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">余小姐</span><span lang="EN-US"> 0755-83676393<span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">魏小姐</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">磁珠专用于抑制信号线、电源线上的高频噪声和尖峰干扰，还具有吸收静电脉冲的能力。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　磁珠是用来吸收超高频信号，象一些</span><span lang="EN-US">RF</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">电路，</span><span lang="EN-US">PLL</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，振荡电路，含超高频存储器电路（</span><span lang="EN-US">DDR SDRAM</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">RAMBUS</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等）都需要在电源输入部分加磁珠，而电感是一种蓄能元件，用在</span><span lang="EN-US">LC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">振荡电路，中低频的滤波电路等，其应用频率范围很少超过错</span><span lang="EN-US">50MHZ.</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">磁珠的功能主要是消除存在于传输线结构（</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">电路）中的</span><span lang="EN-US">RF</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">噪声，</span><span lang="EN-US">RF</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">能量是叠加在直流传输电平上的交流正弦波成分，直流成分是需要的有用信号，而射频</span><span lang="EN-US"> RF</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">能量却是无用的电磁干扰沿着线路传输和辐射（</span><span lang="EN-US">EMI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）。要消除这些不需要的信号能量，使用片式磁珠扮演高频电阻的角色（衰减器），该器件允许直流信号通过，而滤除交流信号。通常高频信号为</span><span lang="EN-US">30MHz</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以上，然而，低频信号也会受到片式磁珠的影响。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　片式磁珠由软磁铁氧体材料组成，构成高体积电阻率的独石结构。涡流损耗同铁氧体材料的电阻率成反比。涡流损耗随信号频率的平方成正比。使用片式磁珠的好处：</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">小型化和轻量化</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在射频噪声频率范围内具有高阻抗，消除传输线中的电磁干扰。</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">闭合磁路结构，更好地消除信号的串绕。极好的磁屏蔽结构。</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">降低直流电阻，以免对有用信号产生过大的衰减。</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">显著的高频特性和阻抗特性（更好的消除</span><span lang="EN-US">RF</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">能量）。在高频放大电路中消除寄生振荡。</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">有效的工作在几个</span><span lang="EN-US">MHz</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">到几百</span><span lang="EN-US">MHz</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的频率范围内。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　要正确的选择磁珠，必须注意以下几点：</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、不需要的信号的频率范围为多少；</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　</span><span lang="EN-US">2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、噪声源是谁；</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　</span><span lang="EN-US">3</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、需要多大的噪声衰减；</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　</span><span lang="EN-US">4</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、环境条件是什么（温度，直流电压，结构强度）；</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、电路和负载阻抗是多少；</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　</span><span lang="EN-US">6</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、是否有空间在</span><b style="mso-bidi-font-weight: normal"><i style="mso-bidi-font-style: normal"><span lang="EN-US"><a href="http://www.lrpcb.cn/">PCB<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">板</span></span></a></span></i></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">上放置磁珠；</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　前三条通过观察厂家提供的阻抗频率曲线就可以判断。在阻抗曲线中三条曲线都非常重要，即电阻，感抗和总阻抗。总阻抗通过</span><span lang="EN-US">ZR22πfL</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（）</span><span lang="EN-US">2+</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</span><span lang="EN-US">=fL</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来描述。通过这一曲线，选择在希望衰减噪声的频率范围内具有最大阻抗而在低频和直流下信号衰减尽量小的磁珠型号。片式磁珠在过大的直流电压下，阻抗特性会受到影响，另外，如果工作温升过高，或者外部磁场过大，磁珠的阻抗都会受到不利的影响。使用片式磁珠和片式电感的原因：是使用片式磁珠还是片式电感主要还在于应用。在谐振电路中需要使用片式电感。而需要消除不需要的</span><span lang="EN-US">EMI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">噪声时，使用片式磁珠是最佳的选择。片式磁珠和片式电感的应用场合：片式电感：</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">射频（</span><span lang="EN-US">RF</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）和无线通讯，信息技术设备，雷达检波器，汽车电子，蜂窝电话，寻呼机，音频设备，</span><span lang="EN-US">PDAs</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（个人数字助理），无线遥控系统以及低压供电模块等。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　片式磁珠：时钟发生电路，模拟电路和数字电路之间的滤波，</span><span lang="EN-US">I/O</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">输入</span><span lang="EN-US">/</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">输出内部连接器（比如串口，并口，键盘，鼠标，长途电信，本地局域网），射频（</span><span lang="EN-US">RF</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）电路和易受干扰的逻辑设备之间，供电电路中滤除高频传导干扰，计算机，打印机，录像机（</span><span lang="EN-US">VCRS</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">），电视系统和手提电话中的</span><span lang="EN-US">EMI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">噪声抑止。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">本文的关键词：</span><b style="mso-bidi-font-weight: normal"><i style="mso-bidi-font-style: normal"><span lang="EN-US"><a href="http://www.pcbinf.com/"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">抄板</span></span></a></span></i></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">pcb</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板，</span><span lang="EN-US">pcb</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设计</span></p>http://www.sichinamag.com/blog/pcbsxl/29961/message.aspxPCB行业新闻 设备材料PCB设计指南Fri, 15 Aug 2008 15:23:57 GMThttp://www.sichinamag.com/blog/pcbsxl/29957/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><b><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体"><a href="http://www.pcbwork.net/pcbsj.asp"><span style="COLOR: black">PCB</span><span lang="EN-US" style="COLOR: black"><span lang="EN-US">设计</span></span></a></span></b><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">指南</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24.1pt; mso-char-indent-count: 2.0"><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体"><a href="http://www.pcbsj.com/"><span style="COLOR: black">PCB</span><span lang="EN-US" style="COLOR: black"><span lang="EN-US">设计</span></span></a></span></b><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体">会对下面三种效应都产生影响：<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体">1.&nbsp;</span><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体">静电放电之前静电场的效应<span lang="EN-US"><br></span>　　<span lang="EN-US">2.&nbsp;</span>放电产生的电荷注入效应<span lang="EN-US"><br></span>　　<span lang="EN-US">3.&nbsp;</span>静电放电电流产生的场效应<span lang="EN-US"><br></span>　　但是，主要是对第三种效应产生影响。下面的讨论将针对第三条所述的问题给出设计指南。<span lang="EN-US"><br></span>　　通常，源于接收电路之间的场耦合可以通过下列方式之一减小：<span lang="EN-US"><br></span>　　<span lang="EN-US">1.&nbsp;</span>在源端使用滤波器以衰减信号<span lang="EN-US"><br></span>　　<span lang="EN-US">2.&nbsp;</span>在接收端使用滤波器以衰减信号<span lang="EN-US"><br></span>　　<span lang="EN-US">3.&nbsp;</span>增加距离以减小耦合<span lang="EN-US"><br></span>　　<span lang="EN-US">4.&nbsp;</span>降低源和<span lang="EN-US">/</span>或接收电路的天线效果以减小耦合<span lang="EN-US"><br></span>　　<span lang="EN-US">5.&nbsp;</span>将接收天线与发射天线垂直放置以减小耦合<span lang="EN-US"><br></span>　　<span lang="EN-US">6.&nbsp;</span>在接收天线与发射天线之间加屏蔽<span lang="EN-US"><br></span>　　<span lang="EN-US">7.&nbsp;</span>减小发射及接收天线的阻抗来减小电场耦合<span lang="EN-US"><br></span>　　<span lang="EN-US">8.&nbsp;</span>增加发射或接收天线之一的阻抗来减小磁场耦合<span lang="EN-US"><br></span>　　<span lang="EN-US">9.&nbsp;</span>采用一致的、低阻抗参考平面（如同多层<b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.pcbwork.net/pcbcb.asp"><span style="COLOR: black">PCB</span><span lang="EN-US" style="COLOR: black"><span lang="EN-US">抄<span lang="EN-US">板</span></span></span></a></span></b>所提供的）耦合信号，使它们保持共模方式<span lang="EN-US"><br><br></span>　　在具体<b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.lrpcb.cn/"><span style="COLOR: black">PCB</span><span lang="EN-US" style="COLOR: black"><span lang="EN-US">设计</span></span></a></span></b>中，如电场或磁场占主导地位，应用方法<span lang="EN-US">7</span>和<span lang="EN-US">8</span>就可以解决。然而，静电放电一般同时产生电场和磁场，这说明方法<span lang="EN-US">7</span>将改善电场的抗扰度，但同时会使磁场的抗扰度降低。方法<span lang="EN-US">8</span>则与方法<span lang="EN-US">7</span>带来的效果相反。所以，方法<span lang="EN-US">7</span>和<span lang="EN-US">8</span>并不是完善的解决方案。不管是电场还是磁场，使用方法<span lang="EN-US">1&nbsp;</span>～<span lang="EN-US">&nbsp;6</span>与<span lang="EN-US">9</span>都会取得一定的效果，但<b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://pcb007.xinwen520.net/"><span style="COLOR: black">PCB</span><span lang="EN-US" style="COLOR: black"><span lang="EN-US">设计</span></span></a></span></b>的解决方法主要取决于方法<span lang="EN-US">3&nbsp;</span>～<span lang="EN-US">&nbsp;6</span>和<span lang="EN-US">9</span>的综合使用。</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p>&nbsp;</o:p></span></p>http://www.sichinamag.com/blog/pcbsxl/29957/message.aspxPCB设计技术资料 设备材料PCB抄板Fri, 15 Aug 2008 15:22:19 GMThttp://www.sichinamag.com/blog/pcbsxl/29954/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板</span><span lang="EN-US">—</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">高科技工作</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span><b style="mso-bidi-font-weight: normal"><a href="http://www.pcbwork.net/"><span style="COLOR: windowtext; TEXT-DECORATION: none; text-underline: none">PCB</span><span lang="EN-US" style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><span lang="EN-US">抄板</span></span></a></b></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">就是通过技术手段将</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.dmpcb.cn/"><span style="COLOR: windowtext; TEXT-DECORATION: none; text-underline: none">pcb</span><span lang="EN-US" style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><span lang="EN-US">电路板</span></span></a></span></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">进行复制</span><span lang="EN-US">,</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">很多人对</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板不了解，其实</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板的难度不是一般人能掌握的，也算是高精尖技术。</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板并不全是做盗版使用的，也有很大一部分是为了开发自己的功能才需要使用反向研究。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">我们可以做个假设，</span><span lang="EN-US">mp3</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">研究需要</span><span lang="EN-US">2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年，我们看到后也开始研究需要</span><span lang="EN-US">2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年（其实这种跟随性的研究需要的时间更长）那么也就是说这</span><span lang="EN-US">2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年间我们只能卖国外的</span><span lang="EN-US">mp3</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，我们自己的</span><span lang="EN-US">mp3</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">晚了国外</span><span lang="EN-US">4</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年时间而且这</span><span lang="EN-US">2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年中国外</span><span lang="EN-US">mp3</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的市场占有率和品牌效应不是简单的时间和金钱能够换回的了，但是如果采用反向研究，我们可以很快的跟上，为了避免盗版我们可以给</span><span lang="EN-US">mp3</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">加上新的功能如收音机等其他功能，这样我们就能在很短的时间内跟国外的一些垄断产品一起竞争了，所以</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.lrpcb.cn/"><span style="COLOR: windowtext; TEXT-DECORATION: none; text-underline: none">PCB</span><span lang="EN-US" style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><span lang="EN-US">抄板</span></span></a></span></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设计、</span><span lang="EN-US">SMT</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">加工、</span><span lang="EN-US">IC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">解密、样机制作并不是那么的邪恶，只是有很多人把他们用在了非法的途径。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span><b style="mso-bidi-font-weight: normal"><a href="http://www.pcbon.net/"><span style="COLOR: windowtext; TEXT-DECORATION: none; text-underline: none">PCB</span><span lang="EN-US" style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><span lang="EN-US">抄板</span></span></a></b></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的步骤和质量也是要求非常高的，绝不是简简单单的就能完成的。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p>&nbsp;</o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">线路板抄板方法及步骤</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p>&nbsp;</o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第一步，拿到一块</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，首先在纸上记录好所有元气件的型号，参数，以及位置，尤其是二极管，三级管的方向，</span><span lang="EN-US">IC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">缺口的方向。最好用数码相机拍两张元气件位置的照片。现在的</span><span lang="EN-US">pcb</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">电路板越做越高级上面的二极管三极管有些不注意根本看不到。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第二步，拆掉所有器件，并且将</span><span lang="EN-US">PAD</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">孔里的锡去掉。用酒精将</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">清洗干净，然后放入扫描仪内，扫描仪扫描的时候需要稍调高一些扫描的像素，以便得到较清晰的图像。再用水纱纸将顶层和底层轻微打磨，打磨到铜膜发亮，放入扫描仪，启动</span><span lang="EN-US">PHOTOSHOP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，用彩色方式将两层分别扫入。注意，</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在扫描仪内摆放一定要横平竖直，否则扫描的图象就无法使用。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第三步，调整画布的对比度，明暗度，使有铜膜的部分和没有铜膜的部分对比强烈，然后将次图转为黑白色，检查线条是否清晰，如果不清晰，则重复本步骤。如果清晰，将图存为黑白</span><span lang="EN-US">BMP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">格式文件</span><span lang="EN-US">TOP.BMP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</span><span lang="EN-US">BOT.BMP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，如果发现图形有问题还可以用</span><span lang="EN-US">PHOTOSHOP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">进行修补和修正。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第四步，将两个</span><span lang="EN-US">BMP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">格式的文件分别转为</span><span lang="EN-US">PROTEL</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">格式文件，在</span><span lang="EN-US">PROTEL</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中调入两层，如过两层的</span><span lang="EN-US">PAD</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</span><span lang="EN-US">VIA</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的位置基本重合，表明前几个步骤做的很好，如果有偏差，则重复第三步。所以说</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.pcbinf.com/"><span style="COLOR: windowtext; TEXT-DECORATION: none; text-underline: none">pcb</span><span lang="EN-US" style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><span lang="EN-US">抄板</span></span></a></span></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是一项极需要耐心的工作，因为一点小问题都会影响到质量和抄板后的匹配程度。</span><span lang="EN-US">&nbsp;</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第五步，将</span><span lang="EN-US">TOP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">层的</span><span lang="EN-US">BMP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">转化为</span><span lang="EN-US">TOP.PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，注意要转化到</span><span lang="EN-US">SILK</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">层，就是黄色的那层，然后你在</span><span lang="EN-US">TOP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">层描线就是了，并且根据第二步的图纸放置器件。画完后将</span><span lang="EN-US">SILK</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">层删掉。不断重复知道绘制好所有的层。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第六步，在</span><span lang="EN-US">PROTEL</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中将</span><span lang="EN-US">TOP.PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</span><span lang="EN-US">BOT.PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">调入，合为一个图就</span><span lang="EN-US">OK</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">了。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第七步，用激光打印机将</span><span lang="EN-US">TOP LAYER</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US"> BOTTOM LAYER</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分别打印到透明胶片上（</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的比例），把胶片放到那块</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">上，比较一下是否有误，如果没错，你就大功告成了。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一块和原板一样的</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.pcblab.net/"><span style="COLOR: windowtext; TEXT-DECORATION: none; text-underline: none">pcb</span><span lang="EN-US" style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><span lang="EN-US">抄板</span></span></a></span></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">就诞生了，但是这只是完成了一半。还要进行测试，测试</span><span lang="EN-US">pcb</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板的电子技术性能是不是和原板一样。如果一样那真的是完成了。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">备注：如果是多层板还要细心打磨到里面的内层，同时重复第三到第五步的</span><span lang="EN-US">pcb</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板步骤，当然图形的命名也不同，要根据层数来定，一般双面板抄板要比多层板简单许多，多层</span><span lang="EN-US">pcb</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">板</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.pcb-ic.com/"><span lang="EN-US" style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><span lang="EN-US">抄板</span></span></a></span></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">容易出现对位不准的情况，所以多层板抄板要特别仔细和小心（其中内部的导通孔和不导通孔很容易出现问题）。</span></p>http://www.sichinamag.com/blog/pcbsxl/29954/message.aspxPCB抄板技术资料 设备材料抄板技巧Fri, 15 Aug 2008 15:20:55 GMThttp://www.sichinamag.com/blog/pcbsxl/29951/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板实战技巧，抄板方法</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">电子产品的轻薄小巧化发展，致使电路板的布局也越趋紧凑，</span><span lang="EN-US">3mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的线宽与线距及高频板应用已非常普遍。面对日益精密的电路板，传统的菲林尺等</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.pcbwork.net/"><span lang="EN-US" style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><span lang="EN-US">抄板</span></span></a></span></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">手段已不能保证其精度与效率。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">下面为大家介绍一种最方便最高效精准的抄板方法，只需要你稍有</span><span lang="EN-US">PROTEL</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">电路基础就能轻易掌握。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">高速精准抄板的高招</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">电子产品的轻薄小巧化发展，致使</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.pcbinf.com/"><span lang="EN-US" style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><span lang="EN-US">电路板</span></span></a></span></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的布局也越趋紧凑，</span><span lang="EN-US">3mil</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的线宽与线距及高频板应用已非常普遍。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">面对日益精密的电路板，传统的菲林尺等抄板手段已不能保证其精度与效率。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">下面为大家介绍一种最方便最高效精准的</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.pcblab.net/"><span lang="EN-US" style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><span lang="EN-US">抄板方法</span></span></a></span></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，只需要你稍有</span><span lang="EN-US">PROTEL</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">电路基础就能轻易掌握。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">要准备什么？呵呵，一台普通扫描仪，你的电脑，安装一个</span><span lang="EN-US">Quickpcb2005</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">程序，够了。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">先简单介绍下流程：</span><span lang="EN-US"><br>1.</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">扫描电路板图片</span><span lang="EN-US"><br>2.</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">运行</span><span lang="EN-US">Quickpcb2005</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">程序</span><span lang="EN-US"><br>3.</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在文件菜单中调入扫描的电路板图片</span><span lang="EN-US"><br>4.</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">这个软件提供了测量工具和计算器，直接在扫描后有彩色图片上放置任意元素</span><span lang="EN-US"><br>5.</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄完顶层，打开层设置菜单，关闭顶层，在文件菜单中调入底层图片</span><span lang="EN-US"><br>6.</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">依次抄出其它内层</span><span lang="EN-US"><br>7.</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">存出</span><span lang="EN-US">PCB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">文件，完成抄板</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以一块双面板为例来说：</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">我们先扫描线路板的上下表层，存出两张</span><span lang="EN-US">BMP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图片。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">打开</span><span lang="EN-US">Quickpcb2005</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，点</span><span lang="EN-US">“</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">文件</span><span lang="EN-US">”“</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">打开底图</span><span lang="EN-US">”</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，打开一张扫描图片。</span><span lang="EN-US"><br>Quickpcb</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">里的图标和快捷键与</span><span lang="EN-US">PROTEL</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">非常相似。</span><span lang="EN-US"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">比如我们用</span><span lang="EN-US">PAGEUP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">放大屏幕，看到焊盘，按</span><span lang="EN-US">PP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">放置一个焊盘，看到线按</span><span lang="EN-US">PT</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">走线</span><span lang="EN-US">……</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">就象小孩描图一样，在这个软件里描画一遍，点</span><span lang="EN-US">“</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">保存</span><span lang="EN-US">”</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"