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text-align: justify; padding-bottom: 0px; line-height: 32px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 36px 0px 22px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 24px; font-weight: 700; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">一、前言</strong></h1> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">在PCB组装过程中通常使用两种类型的技术，通孔（THT）和表面贴装（SMT）。目前，当需要将单个模块板安装在另一个PCB的顶部时，还有另一种技术正在变得普遍，这种技术称为板对板焊接。随着对电路板模块的需求增加，在印刷电路板制造中，逐渐变细的孔（也称为邮票孔）变得越来越普遍。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><img alt="2.jpg" width="700" height="481" src="/d/file/jszc/2019-05-16/987c1291595879e6f82af086180abec7.jpg" /><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <h1 class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; line-height: 32px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 36px 0px 22px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 24px; font-weight: 700; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">二、什么是邮票孔</strong></h1> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">通过对于PCB电路板边缘的孔或通孔做电镀石墨化。切割板边以形成一系列半孔。这些半孔就是我们所说的邮票孔焊盘。 <span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">1、邮票孔的缺点</strong><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">①：是板分开后有锯子状有人叫狗牙状。很容易挡到外壳，有时需要用剪刀剪掉。所以在设计过程要预留位置，一般是把板缩小。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">②：增加成本。邮票孔最小是1.0MM孔，那么这1MM尺寸是算在板里面的。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">2、普邮票孔作用</strong><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">一般PCB是V-CUT，如果碰到异型或圆型板才有可能用到邮票孔。板与板（或空板）之间用邮票孔连接，主要起到支承作用，板不会散掉。开模的话，模具不会塌踏。。最常见的是用它们来创建PCB独立模块，比如Wi-Fi、蓝牙或者核心板模块，然后将其用作在PCB组装过程中放置在另一个板上的独立部件。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">3、邮票孔一般间距</strong><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">0.55mm~~3.0mm（具体视情况而定，常用1.0mm，1.27mm）<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <h1 class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; line-height: 32px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 36px 0px 22px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 24px; font-weight: 700; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">三、邮票孔主要有哪几种类型</strong></h1> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">1、半孔</strong><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent"><img alt="3.jpg" width="700" height="145" src="/d/file/jszc/2019-05-16/375b23e29d18c9f5ebbeeb88000005b3.jpg" /></strong><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <div class="pgc-img" style="box-sizing: border-box; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"> <p style="text-align: justify"> <strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">2、半孔较小的孔</strong><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> </div> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent"><img alt="4.jpg" width="700" height="211" src="/d/file/jszc/2019-05-16/e4e8c35ee4f0df1e0718ee592ecaa771.jpg" /></strong> <span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">3、与板边缘相切的孔</strong><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <div class="pgc-img" style="box-sizing: border-box; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"> <p class="pgc-img-caption" style="box-sizing: border-box; text-align: center; padding-bottom: 0px; line-height: 16px; margin: 0px; padding-left: 0px; padding-right: 0px; color: rgb(119,119,119); font-size: 12px; padding-top: 0px; -webkit-tap-highlight-color: transparent"> <span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> </div> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent"><img alt="5.jpg" width="700" height="222" src="/d/file/jszc/2019-05-16/12bcc603dd7385ae7fed39491fb2b17e.jpg" /></strong><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">4、邮票孔要求</strong><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">根据电路板的需要和最终用途，需要满足一些设计属性。例如：<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">①尺寸：建议使用尽可能大的尺寸。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">②表面处理：取决于电路板的最终用途，但建议使用ENIG。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">③OL垫设计：建议在顶部和底部使用尽可能大的OL垫。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">④孔数：这取决于设计; 然而，众所周知，孔数量越少，PCB组装过程就越困难。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">标准PCB和高级PCB均提供镀半孔。对于标准PCB设计，c形孔的最小直径为1.2 mm。如果您需要较小的c形孔，两个镀半孔之间的最小距离为0.55 mm。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <div class="pgc-img" style="box-sizing: border-box; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"> <p style="text-align: justify"><img alt="PCB邮票孔的作用，如何设计邮票孔" width="700" height="276" inline="0" img_height="209" img_width="530" style="box-sizing: border-box; border-bottom-style: none; margin: 10px auto; border-left-style: none; display: block; max-width: 100%; border-top-style: none; border-right-style: none; -webkit-tap-highlight-color: transparent" src="/d/file/jszc/2019-05-16/7470831f75b8fffe1a66ac514927a3d5.jpg" /><span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="pgc-img-caption" style="box-sizing: border-box; text-align: center; padding-bottom: 0px; line-height: 16px; margin: 0px; padding-left: 0px; padding-right: 0px; color: rgb(119,119,119); font-size: 12px; padding-top: 0px; -webkit-tap-highlight-color: transparent"> <span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> </div> <h1 class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; line-height: 32px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 36px 0px 22px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 24px; font-weight: 700; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">四、如何制造镀半孔</strong></h1> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">通过缩回铜壳，可以保护电镀免受机械损坏。因此，可以精确铣削电镀半孔并提高工艺可靠性。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">镀半孔或c形孔是在板的边缘上镀半个半孔的一半。它们通常用于分线板或小模块。您可能已经在某些Wi-Fi模块上看到过它们，然后焊接到更大的PCB上，类似于IC的安装方式。单层板不具有固定孔。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">电镀半孔可用于标准和高级PCB设计。对于标准PCB设计，c形孔的最小直径为0.5mm，它们之间的间距应至少为0.5mm。更小的较小的c形孔可以做到（低至0.35mm）。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <h1 class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; line-height: 32px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 36px 0px 22px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 24px; font-weight: 700; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial"><strong style="box-sizing: border-box; font-weight: 700; -webkit-tap-highlight-color: transparent">五、邮票孔制造过程</strong></h1> <p class="ql-align-justify" style="box-sizing: border-box; text-align: justify; padding-bottom: 0px; widows: 2; text-transform: none; background-color: rgb(255,255,255); font-style: normal; text-indent: 0px; margin: 16px 0px; padding-left: 0px; letter-spacing: normal; padding-right: 0px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Helvetica Neue', Arial, sans-serif; white-space: normal; orphans: 2; color: rgb(34,34,34); font-size: 16px; font-weight: 400; word-spacing: 0px; padding-top: 0px; -webkit-tap-highlight-color: transparent; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial">首先，在板的边缘上照常制作整个电镀通孔。然后使用铣削工具将孔与铜一起切成两半。由于铜更难以磨削并且可能导致钻头断裂，因此以更高的速度使用重型铣削钻头。这样可以获得更光滑的表面。然后在专用站中检查每个半孔，并在必要时进行去毛刺。这样就可以制作出我们想要的邮票孔了。<span style="display:none">XFASMT技术网-China表面贴装技术-SMT表面贴装-SMT技术网【官网】</span></p> <center><img src="/AD/SMTfgx.gif"/ "/AD/smtjscn.jpg"/></center> <p><br> </p> <style> #cyPoll .vote_txtlist dd{ left: 50%; } </style>  <div class="toolbar"> <div class="share_box"> <div class="bdsharebuttonbox bdshare-button-style1-32 pull-left" data-bd-bind="1455719711329"> <a href="#" class="bds_more" data-cmd="more"></a><a href="#" class="bds_qzone" data-cmd="qzone" title="分享到QQ空间"></a><a href="#" class="bds_tsina" data-cmd="tsina" title="分享到新浪微博"></a><a href="#" class="bds_tqq" data-cmd="tqq" title="分享到腾讯微博"></a><a href="#" class="bds_renren" data-cmd="renren" title="分享到人人网"></a><a href="#" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a> <script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":"0","bdSize":"32"},"share":{},"image":{"viewList":["qzone","tsina","tqq","renren","weixin"],"viewText":"分享到：","viewSize":"16"},"selectShare":{"bdContainerClass":null,"bdSelectMiniList":["qzone","tsina","tqq","renren","weixin"]}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];</script> </div> <a href="/e/member/fava/add/?classid=3&id=1744" target="_blank" class="pull-right shoucang">+收藏</a> </div> </div> <div class="blank20"></div> <div class="interested-article-box"> <span class="span-mark-author">相关文章</span> <div class="article-list-box"> <div class="article-box transition"><a target="_blank" href="/jszc/3025.html"><img src="/d/file/jszc/2024-07-18/2619ef8793faf042f256c014b1814269.jpg" width="213" height="124"></a> <div class="article-title"><a target="_blank" href="/jszc/3025.html">新型焊锡烧结银在汽车电子与IGBT中的应用</a> </div> </div> <div class="article-box transition"><a target="_blank" href="https://mp.weixin.qq.com/s/U6vRO5vorCQSBzo-93_QPw"><img src="/d/file/jszc/2024-07-09/652327f02e26e8eacaabab5054f6d9f4.gif" width="213" height="124"></a> <div class="article-title"><a target="_blank" href="https://mp.weixin.qq.com/s/U6vRO5vorCQSBzo-93_QPw">SMT智造工厂数据采集浅析</a> </div> </div> <div class="article-box transition"><a target="_blank" href="/jszc/3018.html"><img src="/d/file/jszc/2024-07-03/5a2819d3c37eb2b1ff9a4c683cdb909a.jpg" width="213" height="124"></a> <div class="article-title"><a target="_blank" href="/jszc/3018.html">敷形涂覆在潮湿环境中的应用--易被忽略的三个性能要素</a> </div> </div> </div> </div> <div class="blank20"></div> <div class="friend">网友评论</div> <script type="text/javascript" src="/js/jquery.js"></script> <script type="text/javascript" src="/js/jNotify.jquery.min.js"></script> <script type="text/javascript" src="/js/pl.js"></script> <link href="/js/pl.css" rel="stylesheet" type="text/css" /> <div class="scpinglun" id="scpinglun"> <div class="navmenu"> <a href="javascript:void()" class="selected pltab">评论(<abbr class="plnum"><script type="text/javascript" src="/e/public/ViewClick/?classid=3&id=1744&down=2"></script></abbr>)</a> </div> <div class="allplbox"> <div class="plbox"> <form method="post" name="saypl" id="saypl" onSubmit="return CheckPl(document.saypl)"> <input name="username" type="hidden" id="username" value="adminsmtrx@A@"/> <textarea name="saytext" id="saytext"></textarea> <input name="id" type="hidden" id="id" value="1744" /> <input name="classid" type="hidden" id="classid" value="3" /> <input name="enews" type="hidden" id="enews" value="AddPl" /> <input name="repid" type="hidden" id="repid" value="0" /> <input type="hidden" name="ecmsfrom" value="/jszc/1744.html" id="ecmsfrom"> <div class="plsub"><span><a href="javascript:void()" onclick="addface()"><em class="ico_face"></em>添加表情</a><div class="face"></div></span><input name="" type="button" value="评论" class="button small blue yh" onclick="addPl();"/></div> </form> </div> <div class="allpl"> 全部评论(<abbr class="plnum"><script type="text/javascript" src="/e/public/ViewClick/?classid=3&id=1744&down=2"></script></abbr>) </div> <ul class="pllist scpllist" id="infocommentarea"> </ul>  </div> </div> <script src="/e/data/js/ajax.js"></script> <script src="/e/extend/infocomment/commentajax.php?classid=3&id=1744"></script>  </div> </div> <div class="wrap_right pull-right"> <div class="content_R"> <div class="top" style="padding:0px;"> <div style="width:360px; 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