pcbsxl3zh-cnGoodspeed Rss8Fri, 09 Jan 2009 02:13:34 GMTPCB抄板软件不为人知的技巧Tue, 04 Nov 2008 17:27:39 GMThttp://www.sichinamag.com/blog/pcbsxl3/40154/message.aspx<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: 12pt; COLOR: black">PCB</span></b><b style="mso-bidi-font-weight: normal"><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板软件不为人知的技巧</span></b><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black"><?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-ALIGN: center" align="center"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">本文出自：</span><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black">http://www.pcbon.net<o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; mso-char-indent-count: 1.5"><span lang="EN-US" style="COLOR: black"><a href="http://www.zxpcb.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><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">布线软件的书籍和资料大家应该都看得不少了，网上有很多</span><span lang="EN-US" style="COLOR: black">PCB</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板布线技巧的文章，大都是教人如何避免干扰，如何走地线等等，其实这些软件里面还有一个功能，也很好用的，只是绝大部分的书籍都没有介绍。这就是</span><span lang="EN-US" style="COLOR: black">NetClass</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">功能。</span><span lang="EN-US" style="COLOR: black"> <br></span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　</span><span lang="EN-US" style="COLOR: black">Pcb</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板文件首次加载网络表的时候，没有对其进行分类。这个功能可以人工将无数的网络连接分门别类，比如分成</span><span lang="EN-US" style="COLOR: black">power</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="COLOR: black">data_bus</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="COLOR: black">Address_bus</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="COLOR: black">Hi_volta</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等类别。这样分类后可以分别对不同的类别施加不同的布线策略</span><span lang="EN-US" style="COLOR: black"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">好了，现在让我们尝试一下这个功能（以</span><span lang="EN-US" style="COLOR: black">protel</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为例）：</span><span lang="EN-US" style="COLOR: black"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　首先打开一个</span><span lang="EN-US" style="COLOR: black"><a href="http://www.pcbboke.cn/">PCB</a></span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图；选择菜单</span><span lang="EN-US" style="COLOR: black">“Design--&gt;Classes..”<o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　这里我已经预先定好了几个</span><span lang="EN-US" style="COLOR: black">C</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，其中</span><span lang="EN-US" style="COLOR: black">“AllNets”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是</span><span lang="EN-US" style="COLOR: black">protel</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">默认的类别，这个类别包含了所有的网络。如果定义了布线规则，默认就是针对这个类别的。</span><span lang="EN-US" style="COLOR: black"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　现在我要为这个</span><span lang="EN-US" style="COLOR: black">pcb</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板增加一个表示</span><span lang="EN-US" style="COLOR: black">CPU</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地址总线的类别</span><span lang="EN-US" style="COLOR: black">“Address_bus”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，按下</span><span style="COLOR: black"> <span lang="EN-US">“Add”</span></span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">按键，在画面中输选择</span><span lang="EN-US" style="COLOR: black">“A0~A19”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，然后选择</span><span lang="EN-US" style="COLOR: black">“&gt;”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">把这些网络放置到右边的子窗口中。这样就建立好了一个新的</span><span lang="EN-US" style="COLOR: black">pcb</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">网络类别。用同样的办法，再建立</span><span lang="EN-US" style="COLOR: black">“power”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="COLOR: black">“data_bus”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等网络类别。</span><span lang="EN-US" style="COLOR: black"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">好了，我们为这些网络类别分别指定布线策略吧，首先我们为电源类指定布线策略。按下图</span><span lang="EN-US" style="COLOR: black">4</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">画面中的</span><span lang="EN-US" style="COLOR: black">“Add”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">按键，增加一个策略。</span><span lang="EN-US" style="COLOR: black"> “FilterKind”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选择</span><span lang="EN-US" style="COLOR: black">“NetClass”,“NetClass”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选择</span><span lang="EN-US" style="COLOR: black">“POWER”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，然后可以分别设定它的线宽等参数，你还可以为</span><span lang="EN-US" style="COLOR: black">POWER</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">类增加一个靠近限制的规则（由于我这个电路板是</span><span lang="EN-US" style="COLOR: black">4</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">层板，我这个工程就不设置靠近规则了）。</span><span lang="EN-US" style="COLOR: black"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">由于我的这个电路板是一个高速的嵌入式系统，</span><span lang="EN-US" style="COLOR: black">CPU</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">外部总线频率大约</span><span lang="EN-US" style="COLOR: black">200MHz</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。所以地址总线和数据总线的设计就变得至关重要。每个地址总线相互之间的长度差不能太长，否则会造成传输延迟。但是手工去测量长度差实在麻烦，这里就可以为地址总线设置一个布线规则。</span><span lang="EN-US" style="COLOR: black"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　在布线规则窗口中，选择</span><span lang="EN-US" style="COLOR: black">“LengthConstraint”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，弹出窗口，选择</span><span lang="EN-US" style="COLOR: black">“ADDRESS_BUS”</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">类，可以设置总线最大长度和最小长度。所示窗口可以为这个</span><span lang="EN-US" style="COLOR: black">NetClass</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设置蛇形布线规则。</span><span lang="EN-US" style="COLOR: black"><o:p></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设置了以上规则后，无论是手动布线还是自动布线，都会简单很多。在手工布线和修整电路板的过程中，不用再考虑这些参数了，因为你犯规后，</span><span lang="EN-US" style="COLOR: black">PCB</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板编辑器会给出警告。通过这样的设置，你一次可以为一大把信号线设置规则，不再需要一个一个信号单独设置了。可以节约你不少的时间，也可以避免你很多不该犯的低级错误。</span><span lang="EN-US" style="COLOR: black"><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">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> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><span lang="EN-US" style="COLOR: black"><o:p>&nbsp;</o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US" style="COLOR: black"><o:p>&nbsp;</o:p></span></p>http://www.sichinamag.com/blog/pcbsxl3/40154/message.aspx IC设计与软件抄板,PCB抄板,改板,电路板抄板,BOM表Thu, 09 Oct 2008 11:07:27 GMThttp://www.sichinamag.com/blog/pcbsxl3/37157/message.aspx<p class="MsoNormal" style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24.1pt; LINE-HEIGHT: 18pt; TEXT-ALIGN: center; mso-char-indent-count: 2.0; mso-line-height-rule: exactly; mso-pagination: widow-orphan" align="center"><strong><span class="articletitletext1"><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体">抄板<span lang="EN-US">,PCB</span>抄板<span lang="EN-US">,</span>改板<span lang="EN-US">,</span>电路板抄板<span lang="EN-US">,BOM</span>表</span></span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></strong></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">0755-</span><span lang="EN-US"> </span><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">83003609 </span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">『深圳专业的<span lang="EN-US">PCB</span>设计公司』是一家专业印刷电路板<span lang="EN-US">,PCB</span>克隆<span lang="EN-US">,PCB</span>设计<span lang="EN-US">,</span>芯片解密<span lang="EN-US">,IC</span>解密<span lang="EN-US">,</span>制板公司<span lang="EN-US">,</span>我们拥有<span lang="EN-US">10</span>多年<span lang="EN-US">PCB</span>克隆<span lang="EN-US">,PCB</span>打样<span lang="EN-US">,SMT</span>加工<span lang="EN-US">,</span>制板经验，精通各种高频板、高速单、双、多层印刷电路板、设计。<span lang="EN-US">0755-</span></span><span lang="EN-US"> </span><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">83003609<br></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">一、<span lang="EN-US">PCB</span>抄板、设计中心对外承接以下<span lang="EN-US">PCB</span>设计项目：<span lang="EN-US"><br>1</span>、通讯产品：卫星通信基站系统主板、<span lang="EN-US">GPS</span>基站与终端<span lang="EN-US">PCB</span>、手机主板；<span lang="EN-US"> <br>2</span>、电脑网络产品：交换机、计算机主板、板卡、工控板、显示器（<span lang="EN-US">CRT </span>或<span lang="EN-US">LCD</span>）主板，光纤卡<span lang="EN-US">...</span>等；<span lang="EN-US"><br>3</span>、承接开发成果：数字<span lang="EN-US">/</span>模拟语音卡，<span lang="EN-US">ARM7&amp;ARM9</span>开发板，<span lang="EN-US">ARM</span>仿真器系列 ，<span lang="EN-US"> Qloigc</span>光纤卡系列，以太网<span lang="EN-US">TCP/IP</span>系列，汽车电子与系统设计，以太网光电转换器，无线通信<span lang="EN-US">...<br></span>详情请登陆：</span><u><span lang="EN-US" style="COLOR: blue">http://www.pcbwork.net<o:p></o:p></span></u></p> <p class="MsoNormal" style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-line-height-rule: exactly; mso-pagination: widow-orphan" align="left"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">二、<span lang="EN-US">1-28</span>层<span lang="EN-US">PCB</span>板<span lang="EN-US">Layout</span>、克隆（抄板）、改板、<span lang="EN-US">PCB Layout</span>、原理图及<span lang="EN-US">BOM</span>单制作、芯片解密、<span lang="EN-US">PCB</span>生产、成品加工等制板技术能力 最小孔径：<span lang="EN-US">0.3mm<br></span>最小线宽<span lang="EN-US">/</span>间距：<span lang="EN-US">0.1/0.1mm<br></span>最大板面尺寸：<span lang="EN-US">550*600mm<br></span>成品板厚：<span lang="EN-US">0.25-3.0mm<br></span>最小内层厚度：<span lang="EN-US">0.15mm<br></span>表面涂层：喷锡、镍金、无电镍金，防氧化处理<span lang="EN-US"><br></span>金手指电镀：金厚按客户要求<span lang="EN-US"><br></span>三．承接高速<span lang="EN-US">PCB</span>设计<span lang="EN-US"><br>(1) </span>高速率、高密度、数模混合、<span lang="EN-US">R</span>设计<span lang="EN-US"><br>(2) </span>新工艺、新技术的<span lang="EN-US">PCB</span>设计<span lang="EN-US">(</span>如板<span lang="EN-US">HDI</span>埋盲孔等）<span lang="EN-US"><br>(3) </span>对原理图设计错误或隐患进行检查提供更改建议<span lang="EN-US"><br>(4) </span>多人同步进行<span lang="EN-US">PCB</span>板设计<span lang="EN-US">,</span>保证设计进度注：<span lang="EN-US">PCB</span>设计需求资料：原理图或网表<span lang="EN-US">(Netlist</span>）结构图（板尺寸、器件定位信息封装资料（<span lang="EN-US">Datasheet</span>）<span lang="EN-US"><br></span>我们承诺在第一时间为您满足您的需求！<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align="left"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">全国最有实力的<span lang="EN-US">PCB</span>设计<span lang="EN-US">,</span>抄板公司<span lang="EN-US">! </span>想抄板找龙人<span lang="EN-US"><br></span>公司主页：</span><u><span lang="EN-US" style="COLOR: blue">http://www.pcbwork.net<o:p></o:p></span></u></p> <p class="MsoNormal" style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-line-height-rule: exactly; mso-pagination: widow-orphan" align="left"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">联系地址：深圳市福田区（华强北）世界贸易广场<span lang="EN-US">B</span>座<span lang="EN-US">12F/13F&nbsp;&nbsp;&nbsp; </span>邮编：<span lang="EN-US">518033 <br></span>联系电话：<span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>联系人：<span lang="EN-US"><br>0755-83000991&nbsp; 25327575&nbsp; 13148818895&nbsp;&nbsp;&nbsp; </span>余小姐：样机制作、芯片解密等<span lang="EN-US"><br>0755-83000896</span>　<span lang="EN-US">83000816</span>　<span lang="EN-US">13249820801</span>　<span lang="EN-US">&nbsp; </span>张小姐：<span lang="EN-US">PCB</span>抄板、设计、改板、改板等<span lang="EN-US"><br>0755-83798230</span>　<span lang="EN-US">82798235&nbsp; 13242082561&nbsp;&nbsp;&nbsp; </span>任小姐：<span lang="EN-US">OEM/ODM</span>制造、芯片采购等<span lang="EN-US"><br>0755-83346919&nbsp; 83346929&nbsp; 13380363999&nbsp;&nbsp;&nbsp; </span>夏先生：大客户，疑难软件、硬件项目开发<span lang="EN-US"><br></span>传　　真：<span lang="EN-US">0755-83676377</span>　<span lang="EN-US"> <br>E-----mail</span>：<span lang="EN-US"><a href="mailto:pcblab@163.com"><font color="#b03801">pcblab@163.com</font></a><o:p></o:p></span></span></p> <p class="MsoNormal" style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 18pt; TEXT-ALIGN: left; mso-line-height-rule: exactly; mso-pagination: widow-orphan" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">SMT </span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">工 厂<span lang="EN-US"><br></span>工厂地址：深圳市宝安区沙井镇壆岗村第一工业区新沙公路<span lang="EN-US">450</span>号<span lang="EN-US"><o:p></o:p></span></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> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-line-height-rule: exactly" align="left"><span lang="EN-US"><o:p>&nbsp;</o:p></span></p>http://www.sichinamag.com/blog/pcbsxl3/37157/message.aspx IC设计与软件PCB印刷线路抄板入门简介Tue, 23 Sep 2008 11:10:10 GMThttp://www.sichinamag.com/blog/pcbsxl3/36229/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24.1pt; LINE-HEIGHT: 18pt; TEXT-ALIGN: center; mso-char-indent-count: 2.0; mso-line-height-rule: exactly" align="center"><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体">PCB</span></b><b style="mso-bidi-font-weight: normal"><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体">印刷线路抄板入门简介<span lang="EN-US"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></span></b></p><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black"><a href="http://www.pcbwork.net/"><font face="宋体">PCB<span lang="EN-US"><span lang="EN-US">抄板</span></span></font></a></span><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">是英文<span lang="EN-US">(Printed Circuie Board)</span>印制线路板的简称。通常把在绝缘材上，按预定设计，制成<span lang="EN-US">PCB</span>印制线路、印制元件或两者组合而成的导电图形称为印制电路。而在绝缘基材上提供元器件之间电气连接的导电图形，称为<span lang="EN-US">PCB</span>印制线路。这样就把<span lang="EN-US">PCB</span>印制电路或印制线路的成品板称为印制线路板，亦称为印制板或印制电路板。<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black">PCB</span><span style="FONT-SIZE: 9pt; COLOR: black">抄板几乎我们能见到的电子设备都离不开它，小到电子手表、计算器、通用电脑，大到计算机、通迅电子设备、军用武器系统，只要有集成电路等电子无器件，它们之间电气互连都要用到<span lang="EN-US">PCB</span>。它提供集成电路等各种电子元器件固定装配的机械支撑、实现集成电路等各种电子元器件之间的布线和电气连接或电绝缘、提供所要求的电气特性，如特性阻抗等。同时为自动锡焊提供阻焊图形；为元器件插装、检查、维修提供识别字符和图形。<span lang="EN-US"><o:p></o:p></span></span></font></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black">PCB</span><span style="FONT-SIZE: 9pt; COLOR: black">是如何制造出来的呢？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></font></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">因为通用丝网漏印方法得到这种图形，所以我们称这种印制线路板为挠性银浆<span lang="EN-US"><a href="http://www.ldpcb.com/pcbcopy.htm"><span lang="EN-US"><span lang="EN-US">印制线路板</span></span></a></span>。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印制电路板就不同了。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。这种线路板覆铜簿板材，我们就称它为刚性板。再制成印制线路板，我们就称它为刚性印制线路板。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>层的实用印制线路板了。<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black">PCB</span><span style="FONT-SIZE: 9pt; COLOR: black">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，印刷线路板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></font></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">为进一认识<span lang="EN-US"><a href="http://www.x5dj.com/pcbpcbsxl/">PCB</a></span>我们有必要了解一下通常单面、双面印制线路板及普通多层板的制作工艺，于加深对它的了解。<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">单面刚性印制板：→单面覆铜板→下料→（刷洗、干燥）→钻孔或冲孔→网印线路抗蚀刻图形或使用干膜→固化检查修板→蚀刻铜→去抗蚀印料、干燥→刷洗、干燥→网印阻焊图形（常用绿油）、<span lang="EN-US">UV</span>固化→网印字符标记图形、<span lang="EN-US">UV</span>固化→预热、冲孔及外形→电气开、短路测试→刷洗、干燥→预涂助焊防氧化剂（干燥）或喷锡热风整平→检验包装→成品出厂。<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">双面刚性印制板：→双面覆铜板→下料→叠板→数控钻导通孔→检验、去毛刺刷洗→化学镀（导通孔金属化）→（全板电镀薄铜）→检验刷洗→网影）→检验、修板→线路图形电镀→电镀锡（抗蚀镍<span lang="EN-US">/</span>金）→去印料（感光膜）→蚀刻铜→（退锡）→清洁刷洗→网印阻焊图形常用热固化绿油（贴感光干膜或湿膜、曝光、显影、热固化，常用感光热固化绿油）→清洗、干燥→网印标记字符图形、固化→（喷锡或有机保焊膜）→外形加工→清洗、干燥→电气通断检测→检验包装→成品出厂。贯通孔金属化法制造多层板工艺流程→内层覆铜板双面开料→刷洗→钻定位孔→贴光致抗蚀干膜或涂覆光致抗蚀剂→曝光→显影→蚀刻与去膜→内层粗化、去氧化→内层检查→（外层单面覆铜板线路制作、<span lang="EN-US">B</span>—阶粘结片、板材粘结片检查、钻定位孔）→层压→数控制钻孔→孔检查→孔前处理与化学镀铜→全板镀薄铜→镀层检查→贴光致耐电镀干膜或涂覆光致耐电镀剂→面层底板曝光→显影、修板→线路图形电镀→电镀锡铅合金或镍<span lang="EN-US">/</span>金镀→去膜与蚀刻→检查→网印阻焊图形或光致阻焊图形→印制字符图形→（热风整平或有机保焊膜）→数控洗外形→清洗、干燥→电气通断检测→成品检查→包装出厂。<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">从工艺流程图可以看出多层板工艺是从双面孔金属化工艺基础上发展起来的。它除了继了双面工艺外，还有几个独特内容：金属化孔内层互连、钻孔与去环氧钻污、定位系统、层压、专用材料。<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">我们常见的电脑板卡基本上是环氧树脂玻璃布基双面印制线路板，其中有一面是插装元件另一面为元件脚焊接面，能看出焊点很有规则，这些焊点的元件脚分立焊接面我们就叫它为焊盘。为什么其它铜导线图形不上锡呢。因为除了需要锡焊的焊盘等部分外，其余部分的表面有一层耐波峰焊的阻焊膜。其表面阻焊膜多数为绿色，有少数采用黄色、黑色、蓝色等，所以在<span lang="EN-US">PCB</span>行业常把阻焊油叫成绿油。其作用是，防止波焊时产生桥接现象，提高焊接质量和节约焊料等作用。它也是印制板的永久性保护层，能起到防潮、防腐蚀、防霉和机械擦伤等作用。从外观看，表面光滑明亮的绿色阻焊膜，为菲林对板感光热固化绿油。不但外观比较好看，便重要的是其焊盘精确度较高，从而提高了焊点的可靠性。<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">我们从电脑板卡可以看出，元件的安装有三种方式。一种为传动的插入式安装工艺，将电子元件插入印制线路板的导通孔里。这样就容易看出双面印制线路板的导通孔有如下几种：一是单纯的元件插装孔；二是元件插装与双面互连导通孔；三是单纯的双面导通孔；四是基板安装与定位孔。另二种安装方式就是表面安装与芯片直接安装。其实芯片直接安装技术可以认为是表面安装技术的分支，它是将芯片直接粘在印制板上，再用线焊法或载带法、倒装法、梁式引线法等封装技术互联到印制板上。其焊接面就在元件面上。<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">表面安装技术有如下优点：<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black">1</span><span style="FONT-SIZE: 9pt; COLOR: black">） 由于印制板大量消除了大导通孔或埋孔互联技术，提高了印制板上的布线密度，减少了印制板面积（一般为插入式安装的三分阶之一），同时还可降低印制板的设计层数与成本。<span lang="EN-US"><o:p></o:p></span></span></font></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black">2</span><span style="FONT-SIZE: 9pt; COLOR: black">） 减轻了重量，提高了抗震性能，采用了胶状焊料及新的焊接技术，提高了产品质量和可靠性。<span lang="EN-US"><o:p></o:p></span></span></font></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black">3</span><span style="FONT-SIZE: 9pt; COLOR: black">） 由于布线密度提高和引线长度缩短，减少了寄生电容和寄生电感，更有利于提高印制板的电参数。<span lang="EN-US"><o:p></o:p></span></span></font></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black">4</span><span style="FONT-SIZE: 9pt; COLOR: black">） 比插装式安装更容易实现自动化，提高安装速度与劳动生产率，相应降低了组装成本。<span lang="EN-US"><o:p></o:p></span></span></font></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">从以上的表面安技术就可以看出，线路板技术的提高是隋芯片的封装技术与表面安装技术的提高而提高。现在我们看的电脑板卡其表面粘装率都不<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">断地在上升。实际上这种的线路板再用传动的网印线路图形是无法满足技术要求的了。所以普通高精确度线路板，其线路图形及阻焊图形基本上采用感光线路与感光绿油制作工艺。<span lang="EN-US"><o:p></o:p></span></font></span></pre><pre style="TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly"><span style="FONT-SIZE: 9pt; COLOR: black"><font face="宋体">随着线路板高密度的发展趋势，线路板的生产要求越来越高，越来越多的新技术应用于线路板的生产，如激光技术，感光树脂等等。以上仅仅是一些表面的肤浅的介绍，线路板生产中还有许多东西因篇幅限制没有说明，如盲埋孔、绕性板、特氟珑板，光刻技术等等。如要深入的研究还需自己努力。<span lang="EN-US"><o:p></o:p></span></font></span></pre> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; LINE-HEIGHT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-line-height-rule: exactly" align="left"><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></span></p>http://www.sichinamag.com/blog/pcbsxl3/36229/message.aspx IC设计与软件PCB线路板设计解释Tue, 26 Aug 2008 15:55:59 GMThttp://www.sichinamag.com/blog/pcbsxl3/31056/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><b><span lang="EN-US" style="FONT-SIZE: 15pt"><a href="http://www.pcbinf.com/">PCB</a></span></b><b><span style="FONT-SIZE: 15pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">线路板设计解释</span></b><span lang="EN-US" style="FONT-SIZE: 15pt"><?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"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">简介：</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'">、“层</span><span lang="EN-US">(Layer) </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”的概念</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">与字处理或其它许多软件中为实现图、文、色彩等的嵌套与合成而引入的“层”的概念有所同，</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'">的“层”不是虚拟的，而是印刷板材料本身实实在在的各铜箔层。现今，由于电子线路的元件密集安</span><span lang="EN-US"> ...</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'">关键字：</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'">线路板设计</span><span lang="EN-US"><br style="mso-special-character: line-break"><br style="mso-special-character: line-break"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><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'">、“层</span><span lang="EN-US">(Layer) </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”的概念</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'">与字处理或其它许多软件中为实现图、文、色彩等的嵌套与合成而引入的“层”的概念有所同，</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'">的“层”不是虚拟的，而是印刷板材料本身实实在在的各铜箔层。现今，由于电子线路的元件密集安装。防干扰和布线等特殊要求，一些较新的电子产品中所用的印刷板不仅有上下两面供走线，在板的中间还设有能被特殊加工的夹层铜箔，例如，现在的计算机主板所用的印板材料多在</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'">层以上。这些层因加工相对较难而大多用于设置走线较为简单的电源布线层（如软件中的</span><span lang="EN-US">Ground Dever</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">Power Dever</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">），并常用大面积填充的办法来布线（如软件中的</span><span lang="EN-US">ExternaI P1a11e</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">Fill</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）。上下位置的表面层与中间各层需要连通的地方用软件中提到的所谓“过孔（</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'">）”来沟通。有了以上解释，就不难理解“多层焊盘”和“布线层设置”的有关概念了。举个简单的例子，不少人布线完成，到打印出来时方才发现很多连线的终端都没有焊盘，其实这是自己添加器件库时忽略了“层”的概念，没把自己绘制封装的焊盘特性定义为”多层（</span><span lang="EN-US">Mulii</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一</span><span lang="EN-US">Layer)</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的缘故。要提醒的是，一旦选定了所用印板的层数，务必关闭那些未被使用的层，免得惹事生非走弯路。</span><span lang="EN-US"><br><span style="mso-spacerun: yes">&nbsp;</span>2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、过孔</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'">）</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'">　　为连通各层之间的线路，在各层需要连通的导线的文汇处钻上一个公共孔，这就是过孔。工艺上在过孔的孔壁圆柱面上用化学沉积的方法镀上一层金属，用以连通中间各层需要连通的铜箔，而过孔的上下两面做成普通的焊盘形状，可直接与上下两面的线路相通，也可不连。一般而言，设计线路时对过孔的处理有以下原则：（</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'">）尽量少用过孔，一旦选用了过孔，务必处理好它与周边各实体的间隙，特别是容易被忽视的中间各层与过孔不相连的线与过孔的间隙，如果是自动布线，可在“过孔数量最小化”</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"> Via Minimiz8tion</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）子菜单里选择“</span><span lang="EN-US">on</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”项来自动解决。（</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'">）需要的载流量越大，所需的过孔尺寸越大，如电源层和地层与其它层联接所用的过孔就要大一些。</span><span lang="EN-US"><br><span style="mso-spacerun: yes">&nbsp;</span>3</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、丝印层（</span><span lang="EN-US">Overlay</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"><br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　为方便电路的安装和维修等，在印刷板的上下两表面印刷上所需要的标志图案和文字代号等，例如元件标号和标称值、元件外廓形状和厂家标志、生产日期等等。不少初学者设计丝印层的有关内容时，只注意文字符号放置得整齐美观，忽略了实际制出的</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'">效果。他们设计的印板上，字符不是被元件挡住就是侵入了助焊区域被抹赊，还有的把元件标号打在相邻元件上，如此种种的设计都将会给装配和维修带来很大不便。正确的丝印层字符布置原则是：”不出歧义，见缝插针，美观大方”。　　</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'">、</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'">的特殊性</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">Protel</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">封装库内有大量</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'">封装，即表面焊装器件。这类器件除体积小巧之外的最大特点是单面分布元引脚孔。因此，选用这类器件要定义好器件所在面，以免“丢失引脚（</span><span lang="EN-US">Missing Plns</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）”。另外，这类元件的有关文字标注只能随元件所在面放置。</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'">、网格状填充区（</span><span lang="EN-US">External Plane </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）和填充区</span><span lang="EN-US">(Fill) <br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　正如两者的名字那样，网络状填充区是把大面积的铜箔处理成网状的，填充区仅是完整保留铜箔。初学者设计过程中在计算机上往往看不到二者的区别，实质上，只要你把图面放大后就一目了然了。正是由于平常不容易看出二者的区别，所以使用时更不注意对二者的区分，要强调的是，前者在电路特性上有较强的抑制高频干扰的作用，适用于需做大面积填充的地方，特别是把某些区域当做屏蔽区、分割区或大电流的电源线时尤为合适。后者多用于一般的线端部或转折区等需要小面积填充的地方。</span><span lang="EN-US"><br><span style="mso-spacerun: yes">&nbsp;</span>6</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、焊盘</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'">）</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'">　　焊盘是</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">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'">中最常接触也是最重要的概念，但初学者却容易忽视它的选择和修正，在设计中千篇一律地使用圆形焊盘。选择元件的焊盘类型要综合考虑该元件的形状、大小、布置形式、振动和受热情况、受力方向等因素。</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'">在封装库中给出了一系列不同大小和形状的焊盘，如圆、方、八角、圆方和定位用焊盘等，但有时这还不够用，需要自己编辑。例如，对发热且受力较大、电流较大的焊盘，可自行设计成“泪滴状”，在大家熟悉的彩电</span><span lang="EN-US"><a href="http://hexun.com/pcbchaobanxl">PCB</a></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的行输出变压器引脚焊盘的</span><span lang="EN-US"><a href="http://hi.baidu.com/pcbchaobanxl"><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'">中，不少厂家正是采用的这种形式。一般而言，自行编辑焊盘时除了以上所讲的以外，还要考虑以下原则：</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'">）形状上长短不一致时要考虑连线宽度与焊盘特定边长的大小差异不能过大；</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'">）需要在元件引角之间走线时选用长短不对称的焊盘往往事半功倍；</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'">）各元件焊盘孔的大小要按元件引脚粗细分别编辑确定，原则是孔的尺寸比引脚直径大</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'">．</span><span lang="EN-US">2- 0</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'">毫米。</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"> 7</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、各类膜（</span><span lang="EN-US">Mask) <br></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">　　</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">这些膜不仅是</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'">制作工艺过程中必不可少的，而且更是元件焊装的必要条件。按“膜”所处的位置及其作用，“膜”可分为元件面（或焊接面）助焊膜（</span><span lang="EN-US">TOp or Bottom </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和元件面（或焊接面）阻焊膜（</span><span lang="EN-US">TOp or BottomPaste Mask</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）两类。</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">顾名思义，助焊膜是涂于焊盘上，提高可焊性能的一层膜，也就是在绿色板子上比焊盘略大的各浅色圆斑。阻焊膜的情况正好相反，为了使制成的板子适应波峰焊等焊接形式，要求板子上非焊盘处的铜箔不能粘锡，因此在焊盘以外的各部位都要涂覆一层涂料，用于阻止这些部位上锡。可见，这两种膜是一种互补关系。由此讨论，就不难确定菜单中类似“</span><span lang="EN-US">solder Mask En1argement</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”等项目的设置了。</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'">　　</span><span lang="EN-US"> 8</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、飞线，飞线有两重含义：</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'">）自动布线时供观察用的类似橡皮筋的网络连线，在通过网络表调入元件并做了初步布局后，用“</span><span lang="EN-US">Show </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">命令就可以看到该布局下的网络连线的交叉状况，不断调整元件的位置使这种交叉最少，以获得最大的自动布线的布通率。这一步很重要，可以说是磨刀不误砍柴功，多花些时间，值！另外，自动布线结束，还有哪些网络尚未布通，也可通过该功能来查找。找出未布通网络之后，可用手工补偿，实在补偿不了就要用到“飞线”的第二层含义，就是在将来的印板上用导线连通这些网络。要交待的是，如果该电路板是大批量自动线生产，可将这种飞线视为</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'">欧阻值、具有统一焊盘间距的电阻元件来进行设计</span><span lang="EN-US">.</span></p>http://www.sichinamag.com/blog/pcbsxl3/31056/message.aspx IC设计与软件PCB抄板秘技Tue, 26 Aug 2008 15:55:31 GMThttp://www.sichinamag.com/blog/pcbsxl3/31055/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 16pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align="center"><b><span lang="EN-US" style="FONT-SIZE: 15pt; COLOR: #330000; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><a href="http://www.pcb-ic.com/">PCB<span lang="EN-US"><span lang="EN-US">抄板</span></span></a></span></b><b><span style="FONT-SIZE: 15pt; COLOR: #330000; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">秘技</span></b><span lang="EN-US" style="FONT-SIZE: 15pt; COLOR: #330000; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><?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; LINE-HEIGHT: 16pt; mso-pagination: widow-orphan"><span style="FONT-SIZE: 12pt; COLOR: #330000; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">第一步，拿到一块<span lang="EN-US">PCB</span>，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，三机管的方向，<span lang="EN-US">IC</span>缺口的方向。最好用数码相机拍两张元气件位置的照片。<span lang="EN-US"><br><br></span>第二步，拆掉所有器件，并且将<span lang="EN-US">PAD</span>孔里的锡去掉。用酒精将<span lang="EN-US"><a href="http://www.dmpcb.cn/">PCB</a></span>清洗干净，然后放入扫描仪内，启动<span lang="EN-US">POHTOSHOP</span>，用彩色方式将丝印面扫入，并打印出来备用。<span lang="EN-US"><br><br></span>第三步，用水纱纸将<span lang="EN-US">TOP LAYER </span>和<span lang="EN-US">BOTTOM LAYER</span>两层轻微打磨，打磨到铜膜发亮，放入扫描仪，启动<span lang="EN-US">PHOTOSHOP</span>，第一步，拿到一块<span lang="EN-US">PCB</span>，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，三机管的方向，<span lang="EN-US">IC</span>缺口的方向。最好用数码相机拍两张元气件位置的照片。<span lang="EN-US"><br><br></span>第二步，拆掉所有器件，并且将<span lang="EN-US">PAD</span>孔里的锡去掉。用酒精将<span lang="EN-US">PCB</span>清洗干净，然后放入扫描仪内，启动<span lang="EN-US">POHTOSHOP</span>，用彩色方式将丝印面扫入，并打印出来备用。<span lang="EN-US"><br><br></span>第三步，用水纱纸将<span lang="EN-US">TOP LAYER </span>和<span lang="EN-US">BOTTOM LAYER</span>两层轻微打磨，打磨到铜膜发亮，放入扫描仪，启动<span lang="EN-US">PHOTOSHOP</span>，用彩色方式将两层分别扫入。注意，<span lang="EN-US">PCB</span>在扫描仪内摆放一定要横平树直，否则扫描的图象就无法使用。<span lang="EN-US"><br><br></span>第四步，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 lang="EN-US">BMP</span>格式文件<span lang="EN-US">TOP.BMP</span>和<span lang="EN-US">BOT.BMP</span>。<span lang="EN-US"><br><br></span>第五步，将两个<span lang="EN-US">BMP</span>格式的文件分别转为<span lang="EN-US">PROTEL</span>格式文件，在<span lang="EN-US">PROTEL</span>中调入两层，如过两层的<span lang="EN-US">PAD</span>和<span lang="EN-US">VIA</span>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。<span lang="EN-US"><br><br></span>第六，将<span lang="EN-US">TOP</span>。<span lang="EN-US">BMP</span>转化为<span lang="EN-US">TOP</span>。<span lang="EN-US"><a href="http://pcbchaobanxl.blog.chinabyte.com/">PCB</a></span>，注意要转化到<span lang="EN-US">SILK</span>层，就是黄色的那层，然后你在<span lang="EN-US">TOP</span>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 lang="EN-US">SILK</span>层删掉。<span lang="EN-US"><br></span>第七步，将<span lang="EN-US">BOT</span>。<span lang="EN-US">BMP</span>转化为<span lang="EN-US">BOT</span>。<span lang="EN-US">PCB</span>，注意要转化到<span lang="EN-US">SILK</span>层，就是黄色的那层，然后你在<span lang="EN-US">BOT</span>层描线就是了。画完后将<span lang="EN-US">SILK</span>层删掉。<span lang="EN-US"><br><br></span>第八步，在<span lang="EN-US">PROTEL</span>中将<span lang="EN-US">TOP</span>。<span lang="EN-US">PCB</span>和<span lang="EN-US">BOT</span>。<span lang="EN-US">PCB</span>调入，合为一个图就<span lang="EN-US">OK</span>了。<span lang="EN-US"><br><br></span>第九步，用激光打印机将<span lang="EN-US">TOP LAYER</span>，<span lang="EN-US"> BOTTOM LAYER</span>分别打印到透明胶片上（<span lang="EN-US">1</span>：<span lang="EN-US">1</span>的比例），把胶片放到那块<span lang="EN-US"><a href="http://blog.cechinamag.com/pcbchaobanxl/">PCB</a></span>上，比较一下是否有误，如果没错，你就大功告成了。 <span lang="EN-US"><o:p></o:p></span></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/pcbsxl3/31055/message.aspx IC设计与软件先进的PCB抄板实战技巧以及抄板方法Wed, 20 Aug 2008 15:54:46 GMThttp://www.sichinamag.com/blog/pcbsxl3/30511/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: 16pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">先进的</span></b><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 16pt">PCB</span></b><b style="mso-bidi-font-weight: normal"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板实战技巧以及抄板方法</span></b><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 16pt"><?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: 52.5pt; mso-char-indent-count: 5.0"><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'">生成一个</span><span lang="EN-US">B2P</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的文件。</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'">然后我们再点</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'">，打开另一层的扫描彩图</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'">再点</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</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'">，打开前面保存的</span><span lang="EN-US">B2P</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">文件，我们看到刚抄好的板，叠在这张图片之上</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'">同一张</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">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'">，孔在同一位置，只是线路连接不同。所以我们按</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'">选项</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'">层设置</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'">，在这里关闭显示顶层的线路和丝印，只留下多层的过孔。</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'">顶层的过孔与底层图片上的过孔在同一位置，现在我们再象童年时描图一样，描出底层的线路就可以了。再点</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'">这时的</span><span lang="EN-US">B2P</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">文件就有了顶层和底层两层的资料了。</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'">这时我们点</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'">导出为</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</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'">，就可以得到一个有两层资料的</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'">文件，我们可以再改板或再出</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.pcbon.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">原理图</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'">或直接生产</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'">如果是四层、六层、八层，又要如何处理呢？</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'">其实四层就是重复抄两个双面，六层就是重复抄三个双面</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'">，多层之所以让人望而生畏，是因为我们无法看到其内部的走线。一块精密的多层，我们怎样看到其内层乾坤呢？</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'">分层。</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'">现在分层的办法有很多，有药水腐蚀、刀具剥离等，但很容易把层分过头，丢失资料。经验告诉我们，砂纸打磨是最准确的。</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'">当我们抄完</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'">的顶底层后，一般都是用砂纸打磨的办法，磨掉表层显示内层；砂纸就是五金店出售的普通砂纸，一般平铺</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'">，然后按住砂纸，在</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></a></span></b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">上均匀磨擦（如果板子很小，也可以平铺砂纸，用一根手指按住</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'">在砂纸上磨擦）。要点是要铺平，这样才能磨得均匀。</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'">丝印与绿油一般一擦就掉，铜线与铜皮就要好好擦几下。一般来说，蓝牙板几分钟就能擦好，内存条大概要十几分钟；当然力气大，花的时间会少一点；力气小花的时间就会多一点。</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'">磨板是目前分层用得最普遍的方案，也是最经济的了。咱们可以找块废弃的</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'">试一下，其实磨板没什么技术难度，只是有点枯燥，要花点力气，完全不用担心会把板子磨穿磨到手指头哦。</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/pcbsxl3/30511/message.aspx IC设计与软件一分钱对于PCB设计师的重要性Wed, 20 Aug 2008 15:54:03 GMThttp://www.sichinamag.com/blog/pcbsxl3/30510/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> </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.pcbwork.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><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://pcbchaoban.cn.mmimm.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">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.icdec.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/pcbsxl3/30510/message.aspx IC设计与软件PCB板设计的八条黄金建议Wed, 20 Aug 2008 15:53:26 GMThttp://www.sichinamag.com/blog/pcbsxl3/30509/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'">板设计的八条黄金建议</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> </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'">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> </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> </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> </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> </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> </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> </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> </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> </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> </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> </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> </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> </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> </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> </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> </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> </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'">线路图</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> </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> </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> </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> </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> </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> </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> </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> </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> </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'">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> </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> </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> </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> </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> </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> </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> </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> </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> </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"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p>&nbsp;</o:p></span></p>http://www.sichinamag.com/blog/pcbsxl3/30509/message.aspx IC设计与软件