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November 2004

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Subject:
Via hole failures (with pictures)
From:
Al Onderick <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Al Onderick <[log in to unmask]>
Date:
Thu, 4 Nov 2004 16:55:08 -0600
Content-Type:
text/plain
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text/plain (24 lines) 
I have a couple of boards that have failed at a customer site. After
testing, a via was identified as open. The following link is a picture of
the cross section.

http://www.tier1gear.com/temp/via_crack.jpg

The board was .062, the via .010 and the surface finish immersion white
tin.

I would appreciate any insight into what may cause a failure like this.

Al Onderick
National Instruments

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