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June 2008

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Subject:
Annular Rings on Via holes
From:
Paul Baine <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Paul Baine <[log in to unmask]>
Date:
Wed, 11 Jun 2008 10:06:08 -0400
Content-Type:
text/plain
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text/plain (22 lines) 
Hello all,

We received some PCBs from a Vendor where the Via holes have an incomplete annular ring.  See attached photo.

We have looked at Section 2.10.3 & 2.10.4 of IPC-A-600E (we don't have the most recent Revision yet) and we are not sure whether these Sections of the Standard apply to via holes.

Any comments?  Many thanks.

Paul Baine
Q.A. Manager
C-Tech Ltd.

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