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华强北最强的pcb抄板与芯片解密服务提供商
深圳龙人拥有一批经验丰富的专家为您提供专业的pcb抄板,pcb设计,芯片解密,电路板抄板,电路板设计,IC解密,单片机解密,pcb改板等服务,详情:http://www.pcbwork.net,电话:0755-83676369 83676323 魏小姐
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姓名:小敏 职业:IT 年龄:20 位置:广东 个性介绍:想做什么就大胆去做!
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编写PCB设计规则检查器技巧
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PCB板抗干扰经验总结
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印制电路板废水处理现状报..
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PCB设计的重要性
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编写PCB设计规则检查器技巧
<DIV>本文阐述了一种编写<A href="http://www.pcbaok.com/tech/"><SPAN style="COLOR: #00ccff">PCB</SPAN></A>设计规则检查器(DRC)系统方法。利用电路图生成工具得到PCB设计后,即可运行DRC以找到任何违反设计规则故……
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发表于:2009-10-29 ┆
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PCB板抗干扰经验总结
<DIV><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> <P><SPAN style="FONT-SIZE: 9pt">详细信息欢迎登陆<SPAN lang=EN-US……
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发表于:2009-06-29 ┆
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印制电路板废水处理现状报告-CPCA
<DIV><FONT size=3><SPAN lang=EN-US><FONT face="Times New Roman">2007</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">5</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">月</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">日</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">~</SPAN><?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="31" Month="8" Year="2008"><SPAN lang=EN-US><FONT face="Times New Roman">8</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">月</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">31</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">日</SPAN></st1:chsdate><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><FONT face="Times New Roman">CPCA</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">环保洁净分会以书面调查和人员上门走访调查相结合的方式对全国</SPAN><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><A href="http://www.pcb-ic.com/PCBcb/index.html"><FONT face="Times New Roman" color=#800080>PCB</FONT></A></SPAN></B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">行业主要单位进行了环保大调查。</SPAN></FONT><SPAN lang=EN-US><BR></SPAN><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> 书面调查表共发出</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">150</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">份,收到反馈调查表单位共</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">50</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">家,上门走访了华南、华东、和华北三大区域,有代表性的</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">PCB</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">生产厂家共</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">22</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">家。</SPAN></FONT></DIV>
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发表于:2008-09-09 ┆
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PCB设计的重要性
<DIV><br /> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">文章来自:</SPAN><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><A href="http://www.pcbcb.com/"><FONT color=#800080><FONT face="Times New Roman">pcb</FONT><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>抄板资料站</SPAN></SPAN></FONT></A></SPAN></B></FONT></P><br /> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><FONT face="Times New Roman">PCB</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">即</SPAN><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><A href="http://www.pcbwork.net/"><SPAN lang=EN-US style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><SPAN lang=EN-US><FONT color=#800080>印刷电路板</FONT></SPAN></SPAN></A></SPAN></B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,是电子电路的承载体。在现代电子产品中,几乎都要使用</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">PCB</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</SPAN></FONT><SPAN lang=EN-US><BR><FONT face="Times New Roman" size=3>PCB</FONT></SPAN><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设计是电路设计的最后一个环节,也是对原理电路的再设计。一些新的工程师往往低估</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">PCB</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设计的重要性,将这一即烦琐又费事的工作完全交由技术员去完成。在这里我先讲一个关于</SPAN><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><A href="http://www.pcbsj.com/"><FONT color=#0000ff><FONT face="Times New Roman">PCB</FONT><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></FONT></A></SPAN></B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的故事,由于涉及企业的隐私,故此隐去了真实的地点和企业名称。</SPAN></FONT></P></DIV>
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发表于:2008-08-27 ┆
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手机板仿制技术-手机板抄板
<DIV><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">简单点说,手机是由手机板加外壳组成,而手机板是由电路板组成,因此仿制手机的主要技术是手机板克隆即</SPAN><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><A href="http://hi.baidu.com/chaoban01"><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>手机板抄板</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'">、手机</SPAN><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><A href="http://pcbcb.xinwen520.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>电路板抄板</SPAN></SPAN></A></SPAN></B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">PCB</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抄板(所谓</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"><FONT face="Times New Roman">PCB</FONT></SPAN><SPAN lang=EN-US style="COLOR: windowtext; FONT-FAMILY: 宋体; TEXT-DECORATION: none; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; text-underline: none"><SPAN lang=EN-US>抄板</SPAN></SPAN></A></SPAN></B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">即是先将</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">PCB</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">线路板上的元器件拆下来做成</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">BOM</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">单,将空板扫描成图片经</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'">软件处理还原成</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">pcb</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">板图文件)。</SPAN></FONT></DIV>
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发表于:2008-08-19 ┆
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PCB抄板研究-龙人计算机
<FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">先进的扫描设备,专业的</SPAN><B style="mso-bidi-font-weight: normal"><I style="mso-bidi-font-style: normal"><SPAN lang=EN-US><A href="http://www.dmpcb.cn/"><FONT color=#0000ff><SPAN style="TEXT-DECORATION: none; text-underline: none"><FONT face="Times New Roman">PCB</FONT></SPAN><SPAN lang=EN-US style="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></FONT></A></SPAN></I></B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">研究团队,对单层,双层,多层</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">PCB</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">板克隆研究,其中包括各种高难度的盲埋孔</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">PCB</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">板(如数钻盲孔板、数钻埋孔板、一阶(二阶)激光盲孔板、陶瓷板、铝基板,及超高频</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">10GHz</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以上的各类线路板等);</SPAN></FONT><br /> <DIV></DIV>
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发表于:2008-08-09 ┆
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PCB多层板设计步骤揭晓
<SPAN lang=EN-US><A href="http://www.dmpcb.cn/"><FONT color=#0000ff><FONT size=3><STRONG><FONT face="Times New Roman">PCB</FONT><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>多层板</SPAN></SPAN></STRONG></FONT></FONT></A></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><FONT size=3>设计技术,可以说多层板和双层板设计差不多,甚至布线更容易。</FONT></SPAN><SPAN lang=EN-US><BR><FONT face="Times New Roman" size=3> </FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><FONT size=3>你有双层板的设计经验的放,设计多层就不难了。</FONT></SPAN><FONT size=3><SPAN lang=EN-US><FONT face="Times New Roman"> <BR> </FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">首先,你要划分层迭结构,为了方便设计,最好以基板为中心,向两侧对称分布,相临信号层之间用电地层隔离。</SPAN></FONT><FONT size=3><SPAN lang=EN-US><FONT face="Times New Roman"> <BR> </FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">层迭结构</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">(4</FONT></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><FONT face="Times New Roman">6</FONT></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><FONT face="Times New Roman">8</FONT></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><FONT face="Times New Roman">16</FONT></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><FONT face="Times New Roman">)</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">:</SPAN></FONT><FONT size=3><SPAN lang=EN-US><FONT face="Times New Roman"> </FONT></SPAN></FONT><br /> <DIV></DIV>
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发表于:2008-08-09 ┆
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【pcb抄板与改板技术与工艺】PCB的业余制作基本方法与工艺流程
<DIV><br /> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一、</SPAN><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><A href="http://www.pcb-ic.com/"><SPAN lang=EN-US style="COLOR: windowtext; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><SPAN lang=EN-US>印刷电路板</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'">基本制作方法</SPAN></FONT></P><br /> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><FONT face="Times New Roman">1.</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用复写纸将布线图复制到复铜墙铁壁板上:复制前应先用锉刀将复铜板四周边缘锉至平直整齐,而且尺寸尽量与设计图纸尺寸相符,并将复写纸裁成与复铜板一样的尺寸,为了防止在复制过程中产生图纸移动,故要求用胶纸将图纸左右两端与印刷板贴紧。</SPAN></FONT></P></DIV>
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发表于:2008-07-15 ┆
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【pcb抄板技术】高速板4层以上布线总结
<DIV><FONT size=3><SPAN lang=EN-US><FONT face="Times New Roman">1</FONT></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><FONT face="Times New Roman"> 3 </FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">引脚之间尽量不要放线,特别是集成电路引脚之间和周围。</SPAN></FONT><SPAN lang=EN-US><BR><FONT face="Times New Roman" size=3>2</FONT></SPAN><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><FONT face="Times New Roman"> </FONT><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">不同层之间的线尽量不要平行,以免形成实际上的电容。</SPAN></FONT><SPAN lang=EN-US><BR><FONT face="Times New Roman" size=3>3</FONT></SPAN><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><FONT face="Times New Roman"> </FONT><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">布线尽量是直线,或</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">45</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">度折线,避免产生电磁辐射。</SPAN></FONT><SPAN lang=EN-US><BR><FONT face="Times New Roman" size=3>4</FONT></SPAN><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><FONT face="Times New Roman"> </FONT><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地线、电源线至少</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">10-15mil</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以上(对逻辑电路)。</SPAN></FONT><SPAN lang=EN-US><BR><FONT face="Times New Roman" size=3>5</FONT></SPAN><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><FONT face="Times New Roman"> </FONT><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">尽量让铺地多义线连在一起,增大接地面积。线与线之间尽量整齐。</SPAN></FONT><SPAN lang=EN-US><BR><FONT face="Times New Roman" size=3>6</FONT></SPAN><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><FONT face="Times New Roman"> </FONT><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">注意元件排放均匀,以便安装、插件、焊接操作。文字排放在当前字符层,位置合理,注意朝向,避免被遮挡,便于生产。</SPAN></FONT><SPAN lang=EN-US><BR><FONT face="Times New Roman" size=3>7</FONT></SPAN><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><FONT face="Times New Roman"> </FONT><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">元件排放多考虑结构,贴片元件有正负极应在封装和最后标明,避免空间冲突。</SPAN></FONT></DIV>
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发表于:2008-07-15 ┆
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多层pcb板的材料-半固化片
<DIV><br /> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><FONT face="Times New Roman">1. </FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">半固化片的概述</SPAN></FONT></P><br /> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">半固化片主要由树脂和增强材料组成,增强材料又分为玻纤布、纸基、复合材料等几种类型,而制作多层</SPAN><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="COLOR: black"><A href="http://www.lrpcb.cn/"><SPAN lang=EN-US style="COLOR: black; 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>印制板</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'">所使用的半固化片(黏结片)大多是采用玻纤布做增强材料。</SPAN></FONT></P><br /> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">经过处理的玻纤布,浸渍上树脂胶液,再经热处理(预烘)使树脂进入</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">B</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">阶段而制成的薄片材料称为半固化片,是多层板生产中的主要材料之一。</SPAN></FONT><SPAN lang=EN-US><BR><B style="mso-bidi-font-weight: normal"><SPAN style="COLOR: black"><A href="http://wwwpcb.xinwen520.net/"><SPAN lang=EN-US style="COLOR: black; 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><FONT size=3>多层板</FONT></SPAN></SPAN></A></SPAN></B></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><FONT size=3>所用半固化片的主要外观要求有:布面应平整、无油污、无污迹、无外来杂质或其他缺陷、无破裂和过多的树脂粉末,但允许有微裂纹。</FONT></SPAN></P><br /> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><FONT face="Times New Roman">2. </FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">半固化片的主要性能指标</SPAN></FONT></P></DIV>
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发表于:2008-07-04 ┆
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