請問孔徑比是多少?告知PIN直徑和PCB板孔徑。

 

Best Regards

寄件者: TGAsia [mailto:[log in to unmask]] 代理 Bohao Zhou
寄件日期: 201266 10:10
收件者: [log in to unmask]
主旨: [TGAsia] 请教,焊锡引脚上有空洞的原因及判定基准

 


请教各位专家一个问题:
基板在过完波峰焊以后,焊锡引脚上会发生空洞.
附照片:
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请问产生空洞的原因会有哪些呢?另外IPC中有没有关于这方面的判定基准呢?

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This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
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