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<meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="cgikhjy" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258666201172/1858767.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="pjlnk2y" 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>江門電子SMT貼片廠,SMT貼片</p><p><span>***更新：</span>2021-01-31 02:13:28</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="rbd773y" 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="zszrdke" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="eyv3r3j" class="box"><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，江門電子SMT貼片廠。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，江門電子SMT貼片廠，回流焊接，后插裝，江門電子SMT貼片廠，波峰焊。SMT貼片機(jī)的常用知識大全。江門電子SMT貼片廠</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江門電子SMT貼片廠,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258666201172/1858767.png"></div><p style="text-indent:25px">SMT貼片加工中出現(xiàn)元器件移位的原因是什么呢？1.錫膏本身的粘性不夠，元器件在搬運(yùn)時(shí)發(fā)生振蕩、搖晃等問題而造成了元器件移位。2、焊膏中焊劑含量太高，在回流焊過程中過多的焊劑的流動(dòng)導(dǎo)致了元器件的移位。3、元器件在印刷、貼片后的搬運(yùn)過程中由于振動(dòng)或是不正確的搬運(yùn)方式引起了元器件移位。4、貼片加工時(shí)，吸嘴的氣壓沒有調(diào)整好，壓力不夠，造成元器件移位。5、貼片機(jī)本身的機(jī)械問題造成了元器件的安放位置不對。SMT貼片加工中一旦出現(xiàn)元器件移位，就會影響電路板的使用性能，因此在加工過程中就需要了解元器件移位的原因，并針對性進(jìn)行解決。杭州電橋SMT貼片加工清洗劑要有良好潤濕性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江門電子SMT貼片廠,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258632216797/5876714.png"></div><p style="text-indent:25px">SMT貼片加工的模板制作工藝要求是：Mark的處理步驟規(guī)范有哪些？1、Mark的處理方式，是否需要Mark，放在模板的那一面等。2、Mark圖形放在模板的哪一面，應(yīng)根據(jù)印刷機(jī)具體構(gòu)造(攝像機(jī)的位置)而定。3、Mark點(diǎn)刻法視印刷機(jī)而定，有印刷面、非印刷面、兩面半刻，全刻透封黑膠等。4、是否拼板，以及拼板要求。如果拼板，應(yīng)給出拼板的PCB文件。插裝焊盤環(huán)的要求。由于插裝元器件采用再流焊工藝時(shí)，比貼裝元器件要求較多的焊膏量，因此如果有插裝元器件需要采用再流焊工藝時(shí)，可提出特殊要求。</p><p style="text-indent:25px">SMT貼片指的是在PCB基礎(chǔ)上進(jìn)行加工的系列工藝流程的簡稱，PCB（Printed Circuit Board)為印刷電路板。SMT有關(guān)的技術(shù)組成：1、電子元件、集成電路的設(shè)計(jì)制造技術(shù)；2、電子產(chǎn)品的電路設(shè)計(jì)技術(shù)；3、電路板的制造技術(shù)；4、自動(dòng)貼裝設(shè)備的設(shè)計(jì)制造技術(shù)；5、電路裝配制造工藝技術(shù)；6、裝配制造中使用的輔助材料的開發(fā)生產(chǎn)技術(shù)。一般，轉(zhuǎn)塔上安裝有十幾到二十幾個(gè)貼片頭，每個(gè)貼片頭上安裝2~4個(gè)真空吸嘴(較早機(jī)型)至5~6個(gè)真空吸嘴(現(xiàn)在機(jī)型)。由于轉(zhuǎn)塔的特點(diǎn)，將動(dòng)作細(xì)微化，選換吸嘴、送料器移動(dòng)到位、取元件、元件識別、角度調(diào)整、工作臺移動(dòng)(包含位置調(diào)整)、貼放元件等動(dòng)作都可以在同一時(shí)間周期內(nèi)完成，所以實(shí)現(xiàn)真正意義上的高速度。目前較快的時(shí)間周期達(dá)到0.08~0.10秒鐘一片元件。所用設(shè)備為絲印機(jī)（絲網(wǎng)印刷機(jī)），位于SMT生產(chǎn)線的較前端。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江門電子SMT貼片廠,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258582382813/5781319.png"></div><p style="text-indent:25px">SMT貼片加工焊接后的清洗指的是利用物理作用、化學(xué)反應(yīng)的方法去除SMT再流焊、波峰焊和手工焊后殘留在表面組裝板表面的助焊劑殘留物及貼片加工組裝工藝過程中造成的污染物、雜質(zhì)的工序污染物對表面組裝板的危害1、焊劑和焊音中添加的活化劑帶有少量西化物、酸或鹽，焊接后形成極性殘留物履蓋在焊點(diǎn)表面。當(dāng)電子產(chǎn)品加電時(shí)，極性殘留物的離子就會朝極性相反的導(dǎo)體遷移，嚴(yán)重時(shí)會引起短路。2、目前常用焊劑中的鹵化物、氯化物具有很強(qiáng)的活性和吸濕性，在湘濕的環(huán)境中對基板和焊點(diǎn)產(chǎn)生腐蝕作用，使基板的表面絕緣電阻下降并產(chǎn)生電遷移，嚴(yán)重時(shí)會導(dǎo)電，引起短路或斷路。SMT貼片生產(chǎn)文件的準(zhǔn)備有：生產(chǎn)前必須將設(shè)計(jì)文件提供的產(chǎn)品設(shè)計(jì)技術(shù)文件。中山邦定SMT貼片焊接</p><p style="text-indent:25px">廣東有哪些好的SMT貼片公司？江門電子SMT貼片廠</p><p style="text-indent:25px">SMT貼片加工技術(shù)與PCB制造技術(shù)結(jié)合,出現(xiàn)了各種各樣新型封裝的復(fù)合元件。另外,在制造多層板時(shí),不但可以把電阻、電容、電感、ESD元件等無源元件做在里面,需要時(shí)可以將其放在靠近集成電路引腳的地方,而且還能夠把一些有源元件做在里面;不但可以將印刷電路板做得小、薄、輕、快、便宜,而且可使其性能更好?？傊?隨著小型化高密度封裝的發(fā)展,更加模糊了一級封裝與二級封裝之間的界線。隨著新型元器件的不斷涌現(xiàn),一些新技術(shù)、新工藝也隨之產(chǎn)生,從而極大地促進(jìn)了表面組裝工藝技術(shù)的改進(jìn)、創(chuàng)新和發(fā)展,使SMT工藝技術(shù)向更先進(jìn)、更可靠的方向發(fā)展。smt貼片加工的優(yōu)點(diǎn):組裝密度高、電子產(chǎn)品體積小、重量輕，貼片元件的體積和重量只有傳統(tǒng)插裝元件的1/10左右。江門電子SMT貼片廠</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3086224.html</p></div></div></div></div></div><div id="uogikrt" class="page-right twoColRt"><div id="h2mb2ul" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="is7numt" class="recomPic likePro"><a href="http://www.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" 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