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Tue, 25 May 2010 11:12:26 +0800 |
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2D X-ray can not give detailed data about the solder joint defect such as void, shift, insufficient etc. Even you have criteria, how do you judge the defects?
Of course, solder short is obvious, no need criteria.
So judge the defects by your eyes with your experience.
About (P)QFN, even 5DX can not perfectly recognize the real solder joint defects (open or insufficient). But via microscope you can judge the solder joint status.
Believe your eyes!
______________________________
Thanks&Best Regards
Marshal Lv(ÂÀ¹úÇì)
Hangzhou Motorola Cellular Equipment Co.,Ltd.
SMT Engineer
Tel: 0571-86912888 Ext. 7937
E-mail:[log in to unmask]
-----Original Message-----
From: TGAsia [mailto:[log in to unmask]] On Behalf Of Nancy Deng
Sent: 2010Äê5ÔÂ24ÈÕ 8:53
To: [log in to unmask]
Subject: [TGAsia] accpetable criteria for solder joint under X-Ray
Hello, all:
Now X-Ray is used to check the solder joint for BGA, PQFN, D-PAK and so on. But we aren't very clear acceptable criteria for solder joint under X-Ray. We are using 2D X-Ray.
Would you please share your experience or your detail criteria with me?
I would much appreciate your quick response.
Best regards and thanks
Nancy Deng
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