Picture 2 looks like copper dissolution. You may have exposes the copper ring pad to the wave too long time.

 

Suggest to reduce the contact time with solder wave. 

________________________________

From: TGAsia [mailto:[log in to unmask]] On Behalf Of WTSZ-Anny Zhou
Sent: Tuesday, March 11, 2008 1:17 PM
To: [log in to unmask]
Subject: [TGA] 转发: Discrepant Material Report #IRR-08 0088 Requires Disposition.

 

Dear All，

  有谁帮我看看附件上的几幅图片，什么情况下可能会造成如此锡裂？谢谢！

 

 

________________________________

发件人: WTSZ-WenLi Mao 
发送时间: Tuesday, March 11, 2008 12:22 PM
收件人: WTSZ-Anny Zhou
主题: 转发: Discrepant Material Report #IRR-080088 Requires Disposition.

 

 FYI

________________________________

 

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