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