smt生產(chǎn)公司誠(chéng)信互利中山市浩明電子科技供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="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，smt生產(chǎn)公司，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、"><meta name="keywords" content="smt生產(chǎn)公司,SMT貼片"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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class="proBig"><div id="uidsprv" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258719462891/5378899.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="u80uyh5" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258719462891/5378899.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="n50nvkp" 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>smt生產(chǎn)公司,SMT貼片</p><p><span>***更新：</span>2021-01-26 13:18:12</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="l8cc8ky" 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="txu3z3b" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="krebhl8" 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，smt生產(chǎn)公司，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(lái)料檢測(cè)—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，smt生產(chǎn)公司、雙面混裝工藝1)來(lái)料檢測(cè)—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(cè)—返修。先貼后插，適用于SMD元件多于分離元件的情況。2)來(lái)料檢測(cè)—PCB的A面絲印焊膏—貼片—烘干—回流焊接—插件，smt生產(chǎn)公司，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(cè)—返修。A面混裝，B面貼裝。3)來(lái)料檢測(cè)—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(cè)—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。擁有較小的組件是smt貼片的優(yōu)點(diǎn)。smt生產(chǎn)公司</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="smt生產(chǎn)公司,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258719462891/5378899.png"></div><p style="text-indent:25px">SMT貼片加工的優(yōu)點(diǎn)有: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，一般采用SMT之后，電子產(chǎn)品體積縮小40%~60%，重量減輕60%~80%?？煽啃愿?、抗振能力強(qiáng)。焊點(diǎn)缺陷率低，高頻特性好，減少了電磁和射頻干擾。易于實(shí)現(xiàn)自動(dòng)化，提高生產(chǎn)效率。降低成本達(dá)30%~50%。節(jié)省材料、能源、設(shè)備、人力、時(shí)間等。正是由于SMT貼片加工的工藝流程的復(fù)雜，所以出現(xiàn)了很多的SMT貼片加工的工廠，專業(yè)做SMT貼片的加工，得益于電子行業(yè)的蓬勃發(fā)展，SMT貼片加工成就了一個(gè)行業(yè)的繁榮。金華貼片SMT貼片可靠性高、抗振能力強(qiáng)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="smt生產(chǎn)公司,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258632216797/5876714.png"></div><p style="text-indent:25px">因?yàn)镾MT貼片無(wú)鉛焊接溫度比有鉛焊接高，尤其大尺寸、多層板，以及有熱容量大的元器件時(shí)，峰值溫度往往要達(dá)到260℃左右，冷卻凝固到室溫的溫差大，因此，無(wú)鉛焊點(diǎn)的應(yīng)力也比較大。再加上較多的IMC，IMC的熱膨脹系數(shù)比較大，在高溫工作或強(qiáng)機(jī)械沖擊下容易產(chǎn)生開裂。QFP、Chp元件及BGA焊點(diǎn)空洞，分布在焊接界面的空洞會(huì)影響PCBA中個(gè)元器件的連接強(qiáng)度；SOJ引腳焊點(diǎn)裂紋及BGA焊球與焊盤界面的裂紋缺陷，焊點(diǎn)裂紋和焊接界面的裂紋都會(huì)影響PCBA產(chǎn)品的長(zhǎng)期可靠性。另一類是處于焊接界面的空洞(或稱微孔)，這類空洞非常小，甚至只有通過掃描電子顯微鏡（SEM）才能發(fā)現(xiàn)?？斩吹奈恢煤头植伎赡苁窃斐呻娺B接失效的潛在原因。特別是功率元件空洞測(cè)會(huì)使元件熱阻增大，造成失效。研究表明，焊接界面的空洞（微孔）主要是由于Cu的高溶解性造成的。由于無(wú)鉛焊料的熔點(diǎn)高，而且又是高Sn焊料，Cu在無(wú)鉛焊接時(shí)的溶解速度比Sn-Pb焊接時(shí)高許多。無(wú)鉛焊料中銅的高溶解性會(huì)在銅與焊料的界面產(chǎn)生“空洞”，隨著時(shí)間的推移，這些空洞有可能會(huì)削弱焊點(diǎn)的可靠性。</p><p style="text-indent:25px">現(xiàn)在隨著SMT貼片無(wú)鉛化的發(fā)展，近來(lái)在傳統(tǒng)氣相焊設(shè)各的基礎(chǔ)上開發(fā)了學(xué)生一種可以基于噴射系統(tǒng)原理的新方法，這種教學(xué)方法研究能夠更加精確地管理控制以及焊接工作介質(zhì)蒸氣的數(shù)量，同時(shí)在密閉腔體內(nèi)對(duì)組裝板進(jìn)行再流焊?；亓鳒囟群涂刂圃撉€的自由度比氣相焊接系統(tǒng)的傳統(tǒng)方法更高，真空在熔融焊料焊接時(shí)，能夠消除氣泡期間形成，提高可靠性，并降低PCBA的處理成本。該設(shè)備可以采用先進(jìn)的噴射法氣相焊接工作方式，根據(jù)企業(yè)不同環(huán)境溫度變化曲線的要求把一定數(shù)量的情性介質(zhì)氟油噴入處理腔中。當(dāng)液體接觸到處理室的內(nèi)表面時(shí)，液體迅速蒸發(fā)形成蒸氣霧。流體進(jìn)入的量的控制，有可能控制由蒸氣霧攜帶的熱能，可以非常精確和期望的溫度分布的靈活控制。與傳統(tǒng)再流焊比較，具有一定可靠性高、焊點(diǎn)無(wú)空洞、缺陷率低等優(yōu)點(diǎn)。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="smt生產(chǎn)公司,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258702304688/5407070.png"></div><p style="text-indent:25px">加工SMT貼片小批量貴是因?yàn)闆]有太多數(shù)量來(lái)分?jǐn)傁鄳?yīng)的費(fèi)用。對(duì)于PCBA加工廠來(lái)說：“客戶做1片，跟做10000片所需要的工序流程是沒有一丁點(diǎn)差別的”比如元器件檢測(cè)、存樣入系統(tǒng)、錫膏回溫?cái)嚢?、PCB烘烤、貼片編程、SPI檢測(cè)、AOI檢測(cè)、首件檢測(cè)、老化測(cè)試、組裝包裝出貨等等工序。量不大、工序一樣沒少。較大的成本就在于頻繁的轉(zhuǎn)線、換料，時(shí)間成本和人工成本難以縮減。比較簡(jiǎn)單的就是機(jī)器剛跑起來(lái)就要停下來(lái)，真的非常影響生產(chǎn)效率。所以如果不是專業(yè)配置打樣線的PCB加工廠。一般也不會(huì)接小批量SMT貼片加工的訂單。在SMT貼片加工的日常工作中，我們經(jīng)常會(huì)遇到一些做電力電子、電源、工業(yè)控制、充電樁的產(chǎn)品。金華貼片</p><p style="text-indent:25px">SMT貼片加工清洗劑的選擇原則是：密度大，可減緩以及溶劑的揮發(fā)產(chǎn)生速度。smt生產(chǎn)公司</p><p style="text-indent:25px">電子元器件產(chǎn)業(yè)作為電子信息制造業(yè)的基礎(chǔ)產(chǎn)業(yè)，其自身市場(chǎng)的開放及格局形成與國(guó)內(nèi)電子信息產(chǎn)業(yè)的高速發(fā)展有著密切關(guān)聯(lián)，目前在不斷增長(zhǎng)的新電子產(chǎn)品市場(chǎng)需求、全球電子產(chǎn)品制造業(yè)向中國(guó)轉(zhuǎn)移、中美貿(mào)易戰(zhàn)加速國(guó)產(chǎn)品牌替代等內(nèi)外多重作用下，國(guó)內(nèi)電子元器件分銷行業(yè)會(huì)長(zhǎng)期處在活躍期，與此同時(shí)，在市場(chǎng)已出現(xiàn)的境內(nèi)外電子分銷商共存競(jìng)爭(zhēng)格局中，也誕生了一批具有新商業(yè)模式的電子元器件分銷企業(yè)，并受到了資本市場(chǎng)青睞。當(dāng)前國(guó)內(nèi)smt貼片，智能電子鎖，藍(lán)牙系列，網(wǎng)絡(luò)直播聲卡行業(yè)發(fā)展迅速，我國(guó) 5G 產(chǎn)業(yè)發(fā)展已走在世界前列，但在整體產(chǎn)業(yè)鏈布局方面，我國(guó)企業(yè)主要處于產(chǎn)業(yè)鏈的中下游。在產(chǎn)業(yè)鏈上游，尤其是smt貼片，智能電子鎖，藍(lán)牙系列，網(wǎng)絡(luò)直播聲卡和器件等重點(diǎn)環(huán)節(jié)，技術(shù)和產(chǎn)業(yè)發(fā)展水平遠(yuǎn)遠(yuǎn)落后于國(guó)外。目前汽車行業(yè)、醫(yī)治、航空、通信等領(lǐng)域的無(wú)一不刺激著電子元器件。就拿近期的熱門話題“5G”來(lái)說，新的領(lǐng)域需要新的技術(shù)填充?！?G”所需要的元器件開發(fā)有限責(zé)任公司要求相信也是會(huì)更高，制造工藝更難。電子元器件加工是聯(lián)結(jié)上下游供求必不可少的紐帶，目前電子元器件企業(yè)商已承擔(dān)了終端應(yīng)用中的大量技術(shù)服務(wù)需求，保證了原廠產(chǎn)品在終端的應(yīng)用，提高了產(chǎn)業(yè)鏈的整體效率和價(jià)值。電子元器件行業(yè)規(guī)模不斷增長(zhǎng)，國(guó)內(nèi)市場(chǎng)表現(xiàn)優(yōu)于國(guó)際市場(chǎng)，多個(gè)下**業(yè)的應(yīng)用前景明朗，電子元器件行業(yè)具備廣闊的發(fā)展空間和增長(zhǎng)潛力。smt生產(chǎn)公司</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3021446.html</p></div></div></div></div></div><div id="nb5zmfo" class="page-right twoColRt"><div id="vjs8fds" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="bj0sl35" class="recomPic likePro"><a 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