Comments on: 讨论QFN封装在SMT组装焊接的品质允收标准 - 188金宝搏手机官网,188金宝搏苹果下载,188金宝搏苹果手机下载 //m.letratesoro.com/2010/11/qfn%e5%b0%81%e8%a3%9d%e7%9a%84%e7%84%8a%e6%8e%a5%e5%93%81%e8%b3%aa/ 188金宝搏苹果下载 在【188金宝搏苹果手机下载 】打滚多年,分享 SMT、焊锡、188betapp下载 、产品组装与设计、瓦楞包装、不良分析…等经验。请注意文章内容不见得都正确,服用前请三思。188金宝搏苹果下载 也不是专家,无法即时帮你解决工程问题... (对于未授权私自转载者,本人保留法律追诉权)。 Sat, 17 Feb 2024 09:08:09 +0000 hourly 1 https://wordpress.org/?v=6.6.2 By: 188金宝搏苹果下载 //m.letratesoro.com/2010/11/qfn%e5%b0%81%e8%a3%9d%e7%9a%84%e7%84%8a%e6%8e%a5%e5%93%81%e8%b3%aa/comment-page-1/#comment-51931 Tue, 15 Nov 2022 08:21:43 +0000 //m.letratesoro.com/2010/11/qfn%e5%b0%81%e8%a3%9d%e7%9a%84%e7%84%8a%e6%8e%a5%e5%93%81%e8%b3%aa/#comment-51931 In reply to Wilson.

Wilson,
先看看这两篇文章有无帮助:
1.BTC及QFN封装中译名称及EPad气泡空洞率允收标准
2.QFN及BTC散热垫焊接空洞的3个形成原因及5个可能解决方案

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By: Wilson //m.letratesoro.com/2010/11/qfn%e5%b0%81%e8%a3%9d%e7%9a%84%e7%84%8a%e6%8e%a5%e5%93%81%e8%b3%aa/comment-page-1/#comment-51930 Tue, 15 Nov 2022 07:26:44 +0000 //m.letratesoro.com/2010/11/qfn%e5%b0%81%e8%a3%9d%e7%9a%84%e7%84%8a%e6%8e%a5%e5%93%81%e8%b3%aa/#comment-51930 Hi 熊大您好
我是热传工程师对于PCB设计不太了解,想询问您thermal pad上电镀填孔要怎么设计才可以满足SMT制程可行性同时兼顾散热能力??请问是否可以给我一些建议或是参考网站供小弟学习,谢谢您

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By: 188金宝搏苹果下载 //m.letratesoro.com/2010/11/qfn%e5%b0%81%e8%a3%9d%e7%9a%84%e7%84%8a%e6%8e%a5%e5%93%81%e8%b3%aa/comment-page-1/#comment-49988 Mon, 03 Aug 2020 13:42:54 +0000 //m.letratesoro.com/2010/11/qfn%e5%b0%81%e8%a3%9d%e7%9a%84%e7%84%8a%e6%8e%a5%e5%93%81%e8%b3%aa/#comment-49988 In reply to 老马.

老马,
你可以参考一下BGA枕头效应(head-in-pillow,HIP)发生的可能原因与机理
一般都是零件融锡时翘起,过了回焊区后回復原状所造成。

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