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June 2010

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Subject:
From:
Chuck Brummer <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Thu, 17 Jun 2010 15:29:23 -0700
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A ring void.  Maybe no electroless  but probably separated during a 
thermal excursion.  Has it been soldered?  If so the Z axis expansion can 
cause this failure if not it was never plated.

Chuck Brummer
3M Manufacturing Engineer
8357 Canoga Ave.
Canoga Park, CA 91304-2605
(818) 734-4930




From:
Al Onderick <[log in to unmask]>
To:
[log in to unmask]
Date:
06/17/2010 02:04 PM
Subject:
[TN] Thursday Quiz
Sent by:
TechNet <[log in to unmask]>



What causes this ?

http://www.austinwoodsandwaters.com/open-via.jpg



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