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June 1999

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Subject:
PTH Problem
From:
Francis Lai <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Fri, 4 Jun 1999 17:56:22 -0700
Content-Type:
text/plain
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text/plain (23 lines) 
We use the Macdermid PTH line. Recently, after PTH there are fluffy,
small minute copper deposits around the drilled holes besides the
electroless copper on the PTH walls. The copper surface of the panel
looked porous. After copper plating, they became pits on the surface of
the panel and nodules on the PTH walls.
Can any one help?
My e-mail : [log in to unmask]
THANKS!!!!!!!

Francis

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