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October 2000

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TechNet <[log in to unmask]>
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Date:
Fri, 7 Oct 1988 06:19:24 -0500
Reply-To:
"TechNet E-Mail Forum." <[log in to unmask]>, Franklin D Asbell <[log in to unmask]>
Subject:
Re: Etched Pits in Traces...cross sections (sort of)
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From:
Franklin D Asbell <[log in to unmask]>
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Steve,

If after removing the solder mask you see...

base [foil] copper = these defects were caused during electrolytic copper plate

any base laminate = these defects were caused during etch resist

Hope this helps

Franklin

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