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Sender:	TechNet <[log in to unmask]>
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Date:	Fri, 6 Oct 2000 13:46:39 EDT
Reply-To:	"TechNet E-Mail Forum." <[log in to unmask]>, [log in to unmask]
Subject:	Re: Etched Pits in Traces...
MIME-Version:	1.0
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From:	Werner Engelmaier <[log in to unmask]>
Parts/Attachments:	text/plain (17 lines)

Hi Steve,
Could not get the pics, but from your description, it is possible that you
are the recipient of commercial foil that has more than normal organic
plating additives codeposited at the grain boundaries. When this occurs,
which is not very often, the foil strngth and ductility drop, and the
electrical reistivity and etch rate increase.
Good luck.
Werner Engelmaier

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