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May 1997

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Subject:
Fab re: Haloing
From:
Dave Gardiner <[log in to unmask]>
Date:
Thu, 08 May 1997 08:11:31 -0400
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Hi Techneters

IPC-A-600E does not give definitions. What is the technical definition
of haloing and what is the expected failure if it exceeds the 50% of the
distance from the edge to the trace. Given that the haloing is extremely
minimal and that the designed circuit is to close to the edge for
punching to meet this requirement. Are there any reliability tests that
would overrule the rejection.

Dave Gardiner

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