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container clearfix"><div id="vrkss3u" class="twoCol"><div id="olms7kf" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://m.cdcfah.com/cp/second-_dzyqj/">電子元器件</a>?<a href="http://m.cdcfah.com/cp/third-dzyqj_kcdzyqjcl/">庫存電子元器件、材料</a>?批量smt加工歡迎咨詢中山市浩明電子科技供應(yīng)</p><div id="vmygpn3" class="leftbox clearfix"><h1>批量smt加工歡迎咨詢中山市浩明電子科技供應(yīng)</h1><div id="gypfjwb" class="proBig"><div id="8sjwwcw" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258921669922/441409.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="m23njsm" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258921669922/441409.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="pjfs8oy" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>批量smt加工,SMT貼片</p><p><span>***更新：</span>2021-01-21 13:17:41</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="dwxbv8y" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">中山市浩明電子科技有限公司</a></p><p><span>聯(lián)系人：</span>劉江波</p><p><span>郵箱: </span>smtdong@126.com</p><p><span>電話: </span>13590701587</p><p><span>傳真: </span>0760_23880308</p><p><span>網(wǎng)址: </span>http://www.haomiandianzi.shop.88360.com</p><p><span>手機(jī): </span>0760-23880308</p><p><span>地址: </span>東區(qū)白沙灣第二工業(yè)區(qū)C2幢4樓</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="wyuchg8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="nb3kg73" class="box"><p><p style="text-indent:25px">IPQC需利用電橋（LCR表）、萬用表和貼片位置圖來檢查首件，用電橋測量電容和0402電阻的容值、阻值是否與BOM一致，再檢查元器件的絲印、方向是否與stm貼片位置圖一致。在測試首件的過程中，我們用貼片位置圖（必須是執(zhí)行較新ECN的）上的參數(shù)來核對PCB上元器件的參數(shù)。所有的電容需用LCR表測試，在測的時(shí)候盡量按同一個(gè)方向測試，以免有漏測現(xiàn)象。如是0402的電阻也需用LCR表測試，大于0402的電阻及其它物料需核對其絲印、方向是否正確，物料的方向一般以PCB板方向?yàn)闃?biāo)準(zhǔn)（如果貼片位置圖的方向與PCB的方向不一致時(shí)，需找相關(guān)人員確認(rèn)），確保無多料、少料、錯(cuò)件、錯(cuò)位、反向，批量smt加工，批量smt加工、移位等不良現(xiàn)象。SMT表面組裝技術(shù)也愈加成熟，批量smt加工，設(shè)備和功能也在不斷完善，SMT貼片加工技術(shù)已經(jīng)逐漸取代傳統(tǒng)插裝技術(shù)。批量smt加工</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="批量smt加工,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258921669922/441409.png"></div><p style="text-indent:25px">直接接觸stm貼片產(chǎn)品的操作人員，需要戴防靜電手腕帶，并要求戴防靜電手腕帶的操作人員每天上、下年上班前各測試一次，以保證手腕帶與人體的良好接觸。同時(shí)，每天安排相關(guān)人員監(jiān)督檢查，并對員工進(jìn)行貼片加工防靜電方面的知識培訓(xùn)和現(xiàn)場管理。生產(chǎn)過程中手拿產(chǎn)品時(shí)，只能拿產(chǎn)品邊緣無電子元器件處;生產(chǎn)后產(chǎn)品必須裝在防靜電包裝中;安裝時(shí)，要求一次拿一塊產(chǎn)品，不允許一次拿多塊產(chǎn)品。SMT加工廠在返工操作時(shí)，必須將要修理的產(chǎn)品放在防靜電裝置中.再拿到返修工位。整個(gè)生產(chǎn)過程中用到的設(shè)備和工具都應(yīng)具有防靜電能力。SMT貼片加工之后經(jīng)過測試驗(yàn)收合格的產(chǎn)品，應(yīng)用離子噴槍噴射一次再包裝起來。江蘇smt貼片制造有限公司SMT貼片表面需要完整而平滑光亮，不能有缺陷。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="批量smt加工,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258582382813/5781319.png"></div><p style="text-indent:25px">SMT貼片加工模板制作的工藝要求：一、對模板(焊盤)開口尺寸和形狀的修改要求。通常大于3mm的焊盤，為防止焊膏圖形發(fā)生回陷和預(yù)防錫珠，開口采用“架橋”的方式，線寬為0.4mm，使開口小于3mm，可按焊盤大小均分。各種元件對模板厚度與開口尺寸要求。1、μBGA/CSP、FlipChip采用方形開口比采用圓形開口的印刷質(zhì)量好。2、當(dāng)使用免清洗焊膏、采用免清洗工藝時(shí)，模板的開口尺寸應(yīng)縮小5%～10%：3、無鉛工藝模板開口設(shè)計(jì)比有鉛大一些，焊膏盡可能完全覆蓋焊盤。二、適當(dāng)?shù)拈_口形狀可改善SMT貼片加工效果。例如，當(dāng)Chip元件尺寸小于公制1005時(shí)，由于兩個(gè)焊盤之間的距離很小，貼片時(shí)兩端焊盤上的焊膏在元件底部很容易粘連，再流焊后很容易產(chǎn)生元件底部的橋接和焊球。因此，加工模板時(shí)可將一對矩形焊盤開口的內(nèi)側(cè)修改成尖角形或弓形，減少元件底部的焊膏量，這樣可以改善貼片時(shí)元件底部的焊音粘連。</p><p style="text-indent:25px">雙面SMT貼片：雙面PCB板是兩面都有布線，必須要在兩面間有適當(dāng)?shù)碾娐愤B接才行。這種電路間的橋梁叫做導(dǎo)孔，導(dǎo)孔是在PCB上，充滿或涂上金屬的小洞，它可以與兩面的導(dǎo)線相連接，可貼裝元件更多，因而雙面SMT貼片工藝更為復(fù)雜。1、雙面組裝工藝1)來料檢測—PCB的A面絲印焊膏(點(diǎn)貼片膠)—貼片—烘干(固化)—A面回流焊接—清洗—翻板PCB的B面絲印焊膏(點(diǎn)貼片膠)—貼片—烘干—回流焊接，此工藝一般適用于在PCB兩面均貼裝有PLCC等較大的SMD時(shí)采用。2、雙面混裝工藝1)來料檢測—PCB的B面點(diǎn)貼片膠—貼片—固化—翻板—PCB的A面插件—波峰焊—清洗—檢測—返修。先貼后插，適用于SMD元件多于分離元件的情況。2)來料檢測—PCB的A面絲印焊膏—貼片—烘干—回流焊接—插件，引腳打彎—翻板—PCB的B面點(diǎn)貼片膠—貼片—固化—翻板—波峰焊—清洗—檢測—返修。A面混裝，B面貼裝。3)來料檢測—PCB的B面點(diǎn)貼片膠貼片—固化—翻板—PCB的A面絲印焊膏—貼片—A面回流焊接—插件—B面波峰焊—清洗—檢測—返修。A面混裝，B面貼裝。先貼兩面SMD，回流焊接，后插裝，波峰焊。中山有哪些大一些的SMT貼片廠商？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="批量smt加工,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258778203125/6865220.png"></div><p style="text-indent:25px">一般的有機(jī)溶劑清洗或超聲波清洗氣體技術(shù)，是SMT貼片加工中比較普遍使用的高清洗，清洗效率高技術(shù)超聲波清洗的作用超聲波技術(shù)能夠進(jìn)行清洗元件底部、元件企業(yè)之間及細(xì)小間隙中的污染物，適合對高密度、窄間距以及表面組裝板及污染較嚴(yán)重SMA的焊后清洗。由于超聲波振動會產(chǎn)生較大的沖擊力，并具有一定的穿透元器件的能力，可以穿透到封裝材料的層層阻隔進(jìn)入到器件的內(nèi)部，損壞IC的內(nèi)部連接。清洗劑在超聲波的作用下產(chǎn)生形成孔穴結(jié)構(gòu)作用和擴(kuò)散影響作用。孔會產(chǎn)生很強(qiáng)的沖擊力，使附著在表面的污染物被清理掉；超聲波振動，使清洗劑中的液體顆粒產(chǎn)生擴(kuò)散，加速清洗劑溶解污染物的速度。由于清潔劑液體可以被沖成工件的比較小間隙，產(chǎn)生空隙和擴(kuò)散劑在清潔液中的任何部分中，底部構(gòu)件可以被清潔，貼片加工元件和污染物之間的小間隙。超聲波清洗時(shí)產(chǎn)生孔穴的數(shù)量、孔穴的大小及清洗劑振動的力度與壓電振子的振動功率和頻率有關(guān)，孔穴的密度和孔穴的尺寸越大，清洗效率越高。應(yīng)調(diào)整到孔穴的密度和尺寸盡量較大。SMT貼片加工設(shè)備工藝流程：模板：(鋼網(wǎng)) 首先根據(jù)所設(shè)計(jì)的PCB確定是否加工模板。順德加工SMT貼片廠</p><p style="text-indent:25px">直接接觸stm貼片產(chǎn)品的操作人員，需要戴防靜電手腕帶。批量smt加工</p><p style="text-indent:25px">SMT貼片再流焊：從分析可以知道，再流焊質(zhì)量與PCB焊盤設(shè)計(jì)、元器件可焊性、焊膏質(zhì)量、印制電路板的加工質(zhì)量、生產(chǎn)線設(shè)備，以及SMT每道工序的工藝參數(shù)、操作人員的操作都有密切的關(guān)系。同時(shí)也可以看出，PCB設(shè)計(jì)、PCB加工質(zhì)量、元器件和焊膏質(zhì)量是保證再流焊質(zhì)量的基礎(chǔ)，因?yàn)檫@些問題在生產(chǎn)工藝中是很難甚至無法解決的。因此，只要PCB設(shè)計(jì)正確，PCB、元器件和焊膏都是合格的，再流焊質(zhì)量是可以通過印刷、貼裝、再流焊每道工序的工藝來控制的。批量smt加工</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/2947252.html</p></div></div></div></div></div><div id="nzllgak" class="page-right twoColRt"><div id="i8ui3ez" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="qsejvlv" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="ikvzehr" 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