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January 2001

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Subject:
From:
Dave Kell <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 12 Jan 2001 13:29:39 -0600
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I have a customer for a high rel application that is concerned about weave exposure on a epoxy glass stiffener.  

According to IPC-610, weave exposure is not acceptable.  Our material supplier sands the material in order to meet tight thickness tolerances.  Per IPC-6013, stiffeners are to be evaluated only for mechanical support. In addition, the circuit as supplied is allowed weave exposure if conductor spacing is not reduced below minimum. Since a stiffener carries no conductors, I would consider this a non-issue.

Any words of wisdom from manufacturers or assemblers welcome.

Dave Kell
Minco Products, Inc.


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