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class="title_bar"> 發(fā)布日期：<span>2024-08-22</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="rnbp5bx" class="share">  <div id="vnxtvbl" 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="f7xfdjd" class="content"><p style="text-align: center;"><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">SMT<a href='http://www.kslyld.com/' target='_blank' class='key_tag'><font color=#2086ee><strong>貼片加工</strong></font></a>空洞是什么原因?qū)е碌模?/span></strong></p><p><br/></p><br/><p><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">smt貼片空洞是什么？</span></strong></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">?SMT空洞是指在SMT加工過程中，元件焊點(diǎn)內(nèi)部出現(xiàn)的空腔或氣泡，空洞不僅影響產(chǎn)品的外觀，還可能對(duì)產(chǎn)品的性能和可靠性造成嚴(yán)重影響。</span></p><p><br/></p><p style="text-align: center;"><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">空洞如下圖所示，焊點(diǎn)內(nèi)部有空腔或氣泡<br/></span></p><p style="text-align: center;"><img src="/data/upload/image/20240822/1724294306836744.png" title="1724294306836744.png" alt="SMT焊接空洞.png"/></p><p><br/></p><p><br/></p><p><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">smt焊接空洞率標(biāo)準(zhǔn)</span></strong></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">不同行業(yè)產(chǎn)品，焊接空洞率標(biāo)準(zhǔn)不同</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">1）消費(fèi)類電子BGA的氣泡要求不得大于60％(直徑)或36％(面積)</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">2）工業(yè)類電子產(chǎn)品要求不得大于42%（直徑）或20.25%（面積）</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">3）軍用/醫(yī)療類電子產(chǎn)品，要求更為嚴(yán)格，不得大于15%（直徑）或13%（面積）</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">綜上所述，越高端的產(chǎn)品，空洞率標(biāo)準(zhǔn)要求更嚴(yán)格，對(duì)其可靠性、穩(wěn)定性要求極高<br/></span></p><p><br/></p><p><br/></p><p><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">smt空洞形成原因分析</span></strong></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">1）錫膏質(zhì)量</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">錫膏流動(dòng)性不佳，氧化嚴(yán)重會(huì)導(dǎo)致空洞的產(chǎn)生</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">2）爐溫曲線</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">回流焊爐不同溫區(qū)溫度過高或不均勻?qū)е洛a膏揮發(fā)形成空洞</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">3）元件質(zhì)量本身問題</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">元件引腳、焊點(diǎn)、pcb焊盤氧化會(huì)導(dǎo)致空洞</span></p><p><br/></p><p><strong><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">smt空洞解決辦法</span></strong></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">smt空洞有多重原因造成，不能100%杜絕，需要盡量控制在標(biāo)準(zhǔn)范圍內(nèi)，空洞率越低越好，證明smt工藝品質(zhì)強(qiáng)</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">1）錫膏質(zhì)量問題</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">選購合格供應(yīng)商的錫膏品牌，錫膏保存要按照規(guī)章制度執(zhí)行，錫膏回溫時(shí)間、攪拌時(shí)間要充足，確保錫膏均勻性及流動(dòng)性完好</span></p><p><br/></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">2）爐溫曲線問題</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">具體產(chǎn)品具體分析，工藝工程師根據(jù)不同產(chǎn)品的錫膏熔點(diǎn)、pcb板焊盤元件密度、不同元件材料特性，在四個(gè)溫區(qū)設(shè)置合理的溫區(qū)溫度和回焊時(shí)間。</span></p><p><br/></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">3）元件質(zhì)量本身問題</span></p><p><span style="font-size: 16px; font-family: arial, helvetica, sans-serif;">針對(duì)元件質(zhì)量問題，在生產(chǎn)前，需要品檢提前檢查元件質(zhì)量，如出現(xiàn)引腳損壞、焊盤氧化等問題，應(yīng)停止使用，與供應(yīng)商溝通更換。<br/></span></p><br/><p><br/></p></div> <h3 class="tag">本文網(wǎng)址：http://www.kslyld.com/news/1044.html </h3> <h3 class="tag">關(guān)鍵詞：<a href="http://www.kslyld.com/tag/smt%E7%A9%BA%E6%B4%9E%E7%8E%87%E6%A0%87%E5%87%86">smt空洞率標(biāo)準(zhǔn)</a>,<a href="http://www.kslyld.com/tag/smt%E7%A9%BA%E6%B4%9E%E5%8E%9F%E5%9B%A0">smt空洞原因</a> </h3> <div id="z7lxt7l" class="page">上一篇：<a href="http://www.kslyld.com/news/1042.html">SMT貼片加工廠怎樣返工BGA元器件？</a><br />下一篇：<span><a href="http://www.kslyld.com/news/1045.html">SMT貼片加工廠中的PCBA品質(zhì)管控</a></span></div> </div> <div id="phh5nvf" 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