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id="tzz7nzh" class="info_title clearfix"> <h3 class="title_bar"> 發(fā)布日期：<span>2023-12-13</span> 作者：<span>江西英特麗電子科技股份有限公司</span> 點(diǎn)擊：<span></span> </h3> <div id="ln5r7hp" class="share">  <div id="rjv7vvr" class="bdsharebuttonbox"> <a href="#" class="bds_more" data-cmd="more"></a> <a href="#" class="bds_qzone" data-cmd="qzone"></a> <a href="#" class="bds_tsina" data-cmd="tsina"></a> <a href="#" class="bds_tqq" data-cmd="tqq"></a> <a href="#" class="bds_renren" data-cmd="renren"></a> <a href="#" class="bds_weixin" data-cmd="weixin"></a> </div>  </div> </div> <div id="xppnb5r" class="content"><p><br/></p><p style="text-align: center;"><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">SMT貼片電阻立碑是什么原因?qū)е拢?/span></strong></p><p><br/></p><p><a href="http://www.kslyld.com/" target="_self"><em><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">smt貼片</span></strong></em></a><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">電阻立碑是焊接品質(zhì)不良的一種，電阻立碑表示焊盤上的電阻一端翹起，受到拉力的影響，嚴(yán)重一些的話焊盤一端直接空焊而立在焊盤另外一端，這種焊接不良就是立碑。下圖為立碑現(xiàn)象</span></p><p style="text-align: center;"><img src="/data/upload/image/20231213/1702453735644556.png" title="1702453735644556.png" alt="1702453735644556.png" style="width: 400px; height: 288px;" width="400" vspace="0" height="288" border="0"/></p><p style="text-align: center;"><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">圖片來(lái)源于網(wǎng)絡(luò)<br/></span></p><p><br/></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">電阻立碑是有很多原因?qū)е碌?，在?shí)際生產(chǎn)中如果出現(xiàn)此類品質(zhì)不良現(xiàn)象，需要分析原因進(jìn)行排查找到解決辦法，下面就把常見(jiàn)電阻立碑原因分享：</span></p><p><br/></p><p><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">一）pcb焊盤設(shè)計(jì)不良</span></strong></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">1）pcb焊盤設(shè)計(jì)不良主要包括焊盤過(guò)長(zhǎng)或過(guò)短，片式電阻兩端受熱不均衡，焊墊一端的錫膏熱熔速度不均，導(dǎo)致兩端張力不同，出現(xiàn)一端拉起從而翹起來(lái)。<span style="font-size: 16px; font-family: arial, helvetica, sans-serif; color: rgb(255, 255, 255);"><em><strong>文章出處：www.kslyld.com</strong></em></span></span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">2）另外就是元器件焊盤布局不合理，如異形元件、QFP、連接器、BGA等吸熱量大的元件周圍設(shè)計(jì)片式電阻，導(dǎo)致片式電阻兩端吸熱受熱不均衡溫差大，焊墊兩端錫膏熱熔速度出現(xiàn)時(shí)間差，從而出現(xiàn)兩端拉力不均衡導(dǎo)致電阻一端翹起立碑。</span></p><p><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">解決方法</span></strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;"> <br data-from-paste="1" data-diagnose-id="31c667108e42eefe850bfdbb2f0cc1a4"/> 優(yōu)化焊盤設(shè)計(jì)，確保元器件兩端焊盤大小一致，形狀一致<br data-from-paste="1" data-diagnose-id="5a0d1f9c2f6dd82a6e9e8a68aa3cce1e"/></span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">焊盤設(shè)計(jì)布局分類合理，元器件高低擺放布局位置合理</span></p><p><br/></p><p><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">二）加工工藝問(wèn)題</span></strong></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">1）錫膏印刷異常</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">錫膏印刷不良， 70%以上的立碑不良現(xiàn)象都可能與該工序有關(guān)，比如錫膏印刷偏位，錫膏印刷不平整，鋼網(wǎng)開(kāi)孔不合理，多錫少錫等等等，會(huì)出現(xiàn)焊盤兩端的錫膏印刷量不均勻，多的一邊會(huì)因錫膏吸熱量增多，融化時(shí)間滯后，導(dǎo)致兩端拉力不同而另外一端被拉起。</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">2）元件貼片偏移</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">貼片偏位，受力不均勻，回流焊接時(shí)會(huì)因時(shí)間差導(dǎo)致兩邊的濕潤(rùn)力不平衡，元件貼片偏位會(huì)直接導(dǎo)致立碑</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">3）回流焊接爐溫度曲線問(wèn)題</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">經(jīng)過(guò)回流焊爐膛內(nèi)時(shí)間過(guò)短和溫區(qū)太少，就會(huì)造成PCB受熱不均勻，導(dǎo)致PCB板上的元件吸熱溫差過(guò)大，從而導(dǎo)致電阻立碑</span></p><p><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">解決方法</span></strong></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">保證印刷質(zhì)量，檢查錫膏并進(jìn)行良好的管控，同時(shí)使用SPI檢測(cè)提前檢測(cè)</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">飛達(dá)校準(zhǔn)同時(shí)確認(rèn)貼片程序正常<br/></span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">根據(jù)不同產(chǎn)品的結(jié)構(gòu)和布局，進(jìn)行不同的爐溫曲線優(yōu)化，優(yōu)化出適合每款產(chǎn)品的爐溫曲線</span></p><p><br/></p><p><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">三）電阻本身問(wèn)題</span></strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;"><br/></span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">元件氧化，pcb焊盤有污物，元件的可焊性差，錫膏熔化后，表面張力不一樣，元件焊端表面氧化，產(chǎn)生氧化物就會(huì)出現(xiàn)拒焊現(xiàn)象，造成立碑。<br data-from-paste="1" data-diagnose-id="619e0636c77355db2e5a587a0032883a"/></span></p><div><p><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">解決方法</span></strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">：更換換料</span></p><p><br/></p><p><br/></p><p><a href="http://www.kslyld.com/" target="_self" style="text-decoration: underline; font-size: 16px; font-family: arial, helvetica, sans-serif;"><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">英特麗電子科技</span></a><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">目前擁有4大SMT制造基地，分別在江西撫州、安徽宿州、山西晉城和四川內(nèi)江，SMT線體達(dá)到將近100條，每條SMT線都是采用高端設(shè)備（西門子、松下貼片機(jī)，Heller回流焊、dek/mpm印刷機(jī)、科樣 spi等等），每條線體均配置AOI檢測(cè)以及MES系統(tǒng)，可以為客戶提供品質(zhì)生產(chǎn)追溯，同時(shí)配置X-RAY/三防涂覆，擁有多條波峰焊和AI插件線，擁有多條組裝包裝生產(chǎn)線</span></p><p><br/></p></div></div> <h3 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