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January 2013

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Subject:
reliability of PCBs in wired assembly
From:
Ramakrishnan Saravanan <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Ramakrishnan Saravanan <[log in to unmask]>
Date:
Thu, 17 Jan 2013 10:16:07 -0600
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Dear all ,

We received few  PCBs from a fabricator in 2007. The PCB coupon's were micro-sectioned and accepted. Then the  PCBs were wired and conformally coated. Now we came to know that the PCBs were from defective batch. The fabricator did not use sweller before permanganate de smear. 

How to access the reliability of wired PCBs. The PCB assembly is working fine. 


regards,

R.Saravanan

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