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April 1997

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Subject:
Via Pad Missing
From:
Mike Masters <[log in to unmask]>
Date:
Thu, 17 Apr 1997 12:16:39 -0400
Content-Type:
text/plain
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I have a bare PCB with 1 via pad missing on one side of the PCB.  This is a 
multilayer PCB.  After assembly some pass test while others did not.  This is 
how the problem was discovered.  The problem is that several hundred assemblies 
have been produced and are still in-house.  I plan to temperature cycle the 
assemblies to insure connection with the innerlayers.

Has anyone experienced this problem and if so how was it verified reliability 
wise as good product.  If there is not an effective test method of course all 
product will be scraped and sent back to the supplier for reimbursement.

Any ideas?  Any test methods for reliability?

Mike

-- 

Mike Masters
QA Materials Engineering section
Office: (919) 479-3771
FAX:    (919) 479-3328
Internet:  [log in to unmask]



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