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class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258599423828/8570561.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="g7zzbyf" 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>杭州smt生產(chǎn)廠家,SMT貼片</p><p><span>***更新：</span>2021-01-18 13:19:31</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="l77j92c" 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="ml8rl77" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="j7ifcph" class="box"><p><p style="text-indent:25px">因?yàn)镾MT貼片無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。由于無鉛焊料的熔點(diǎn)高，杭州smt生產(chǎn)廠家，而且又是高Sn焊料，Cu在無鉛焊接時(shí)的溶解速度比Sn-Pb焊接時(shí)高許多。無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，杭州smt生產(chǎn)廠家，杭州smt生產(chǎn)廠家，這些空洞有可能會(huì)削弱焊點(diǎn)的可靠性。SMT貼片加工要求各裝配位號(hào)元器件的類型、型號(hào)和極性等特征標(biāo)記要符合產(chǎn)品的裝配圖和BOM表要求。杭州smt生產(chǎn)廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="杭州smt生產(chǎn)廠家,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258599423828/8570561.png"></div><p style="text-indent:25px">在SMT貼片廠中，通常為了保證SMT貼片機(jī)的系統(tǒng)性操作安全性，SMT貼片機(jī)的操作，不只需要有經(jīng)過專業(yè)知識(shí)培訓(xùn)的有經(jīng)驗(yàn)的技術(shù)人員和通行的管理人員來協(xié)同進(jìn)行機(jī)器的操作，以此來保證SMT貼裝的高可靠性和直通率，焊接不良率，良好的高頻特性。減少了一個(gè)電磁和射頻信號(hào)干擾。易實(shí)現(xiàn)自動(dòng)化，提高生產(chǎn)效率。一般管理規(guī)定SMT工廠生產(chǎn)車間的溫度在25±3℃之間。SMT貼裝密度高，電子產(chǎn)品體積小，重量輕，SMT貼片元器件的體積大小和重量只是傳統(tǒng)插裝元器件的一半甚至是十分之一左右。在一般選擇了SMT貼片加工之后，相應(yīng)的功能情況下電子產(chǎn)品的整體體積會(huì)減少40%~60%，重量減少60%~80%。廣州大批量SMT貼片多少錢SMT貼片吸嘴型號(hào)不合適,孔徑太大會(huì)造成漏氣,孔徑太小會(huì)造成吸力不夠。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="杭州smt生產(chǎn)廠家,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258851230469/6773526.png"></div><p style="text-indent:25px">SMT貼片在生產(chǎn)前實(shí)際上要分為好幾個(gè)階段。包括開機(jī)檢查、初驗(yàn)、開機(jī)、生產(chǎn)、停機(jī)等，大多數(shù)時(shí)候我們只關(guān)注某一個(gè)細(xì)節(jié)，卻不能解釋得很詳細(xì)。一：在生產(chǎn)設(shè)計(jì)操作頁面上，點(diǎn)擊選擇按鈕，輸入基板PCB基板選擇窗口；第二步：點(diǎn)擊選擇按鈕，完成基板選擇操作。第三步：機(jī)器讀取單板數(shù)據(jù)，返回主界面，用工程數(shù)據(jù)驗(yàn)證設(shè)定參數(shù)。調(diào)整導(dǎo)軌，確保PCB基板能以設(shè)定的速度進(jìn)入配線架在主界面，點(diǎn)擊設(shè)備傳輸系統(tǒng)設(shè)備傳輸寬度按鈕，進(jìn)入信息傳輸寬度管理界面。更改后的傳輸寬度作為不同尺寸的輸入基板寬度后，單擊“確定”按鈕連續(xù)調(diào)整設(shè)計(jì)導(dǎo)軌的寬度。然后輕輕推動(dòng)基板，確認(rèn)PCB電路板在傳輸軌道上有大約1mm的非常小的間隙。</p><p style="text-indent:25px">SMT生產(chǎn)工藝有兩條基本的工藝流程：即焊膏一回流焊工藝和貼片膠一波峰焊工藝。焊膏一回流焊工藝就是先在印制電路板焊盤上印刷適量的焊膏，再將片式元器件貼放到印制電路板規(guī)定的位置上，之后將貼裝好元器件的印制電路板通過回流爐完成焊接過程。這種SMT貼片加工工藝流程主要適用于只有表面組裝元件的組裝。貼片膠一波峰焊工藝就是先在印制電路板焊盤間點(diǎn)涂適量的貼片膠，再將片式元器件貼放到印制電路板規(guī)定位置上，然后將經(jīng)過貼片加工好元器件的印制電路板通過回流爐完成膠水的固化，之后插裝元器件，之后將插裝元器件與表面組裝元器件同時(shí)進(jìn)行波峰焊接。這種工藝流程適用于表面組裝元器件和插裝元器件的混合組裝。SMT貼片得了快速發(fā)展，已成為世界電子整機(jī)組裝技術(shù)的主流。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="杭州smt生產(chǎn)廠家,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258632216797/5876714.png"></div><p style="text-indent:25px">SMT貼片工廠中，我們大多數(shù)的企業(yè)常用的錫膏合金主要成份為Sn/Pb合金，且合金進(jìn)行比例為63/37。焊料的主要成分粘貼分為兩個(gè)部分的錫粉和助焊劑。助焊劑主要是可以起到有效去除氧化物﹑破壞融錫表面進(jìn)行張力和防止再度發(fā)生氧化的作用。錫膏中錫粉顆粒與助熔劑的體積比約為1：1，重量比約為9：1。SMT加工中錫膏使用前必須經(jīng)過解凍和回溫?cái)嚢璨僮骱蟛拍苁褂?。回溫不能通過使用加熱的方式可以進(jìn)行回溫。PCBA制造中比較容易忽視的一個(gè)環(huán)節(jié)就是“BGA、IC芯片的存儲(chǔ)。芯片的存儲(chǔ)要注意包裝和存放在干燥的環(huán)境中，保持重要元器件的干燥和抗氧化。很多非常重要的問題可能大家都會(huì)注意到，但是在一些細(xì)節(jié)的問題上,我們經(jīng)常會(huì)忽視，往往這些也同樣需要SMT貼片加工中需要特別注意。當(dāng)焊膏印刷，有必要準(zhǔn)備一個(gè)材料粘貼工具，鋼葉片﹑擦拭紙，氣流成洗滌劑﹑攪拌刀。SMT貼片加工可靠性高、抗振能力強(qiáng)。杭州smt生產(chǎn)廠家</p><p style="text-indent:25px">SMT有關(guān)的技術(shù)組成：電子元件、集成電路的設(shè)計(jì)制造技術(shù)。杭州smt生產(chǎn)廠家</p><p style="text-indent:25px">SMT貼片加工焊接后的清洗，對高要求的精密儀表等特殊要求的產(chǎn)品需要做三防處理，三防處理前要求有很高的清潔度，否則在潮熱或高溫等惡劣環(huán)境條件下會(huì)造成電性能下降或失效等嚴(yán)重后果。由于焊后殘留物的速擋，造成在線測或功能測時(shí)測試探針接觸不良，容易出現(xiàn)誤測對于高要求的產(chǎn)品，由于焊后殘留物的遮擋，使一些熱損傷、層裂等缺陷不能暴露出來，造成漏檢而影響可靠性。同時(shí)，殘?jiān)嘁灿绊懟宓耐庥^和板卡的商品性。焊后殘留物會(huì)影響高密度、多I/O連接點(diǎn)陣列芯片、倒裝芯片的連接可靠性。杭州smt生產(chǎn)廠家</p><p style="text-indent:25px">中山市浩明電子科技有限公司專注技術(shù)創(chuàng)新和產(chǎn)品研發(fā)，發(fā)展規(guī)模團(tuán)隊(duì)不斷壯大。公司目前擁有專業(yè)的技術(shù)員工，為員工提供廣闊的發(fā)展平臺(tái)與成長空間，為客戶提供高質(zhì)的產(chǎn)品服務(wù)，深受員工與客戶好評。公司業(yè)務(wù)范圍主要包括：smt貼片，智能電子鎖，藍(lán)牙系列，網(wǎng)絡(luò)直播聲卡等。公司奉行顧客至上、質(zhì)量為本的經(jīng)營宗旨，深受客戶好評。公司力求給客戶提供全數(shù)良好服務(wù)，我們相信誠實(shí)正直、開拓進(jìn)取地為公司發(fā)展做正確的事情，將為公司和個(gè)人帶來共同的利益和進(jìn)步。經(jīng)過幾年的發(fā)展，已成為smt貼片，智能電子鎖，藍(lán)牙系列，網(wǎng)絡(luò)直播聲卡行業(yè)出名企業(yè)。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2903035.html</p></div></div></div></div></div><div id="xwyv7j9" class="page-right twoColRt"><div id="2xmt8zo" class="box01 margin10 clearfix"><h3><a 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