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Reply To: | TechNet E-Mail Forum. |
Date: | Fri, 17 Mar 2000 07:52:29 +0800 |
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Hello David,
Stain may come from your copper surface condition. If you have a bad
pre-cleaning (Acid clean, soft-etching), it will appear a bad surface after
Electroless/immersion plating. Please try to check your pre-cleaning condition.
Another thing is that if your Electroless Ni rapidly oxidize due to long time
dipping @ water rinse, this you may add an acid rinse after Electroless Ni.
I hope this may help you
Jonathan A. Noquil
R&D
Fairchild semiconductor
Cebu, Phils
David Kim <[log in to unmask]> on 03/17/2000 03:16:23 AM
Please respond to "\"TechNet E-Mail Forum.\" <[log in to unmask]>, David
Kim" <[log in to unmask]>
To: [log in to unmask]
cc: (bcc: Jonathan A Noquil/Cebu/Fairchild)
Subject: [TN] stain&gold plating
I am looking for suggestions on "How to remove a stain on gold surface and
why does a stain happen on gold surface after plating?"
In electroless Ni/immersion Au plating, I have found many stain problems
after plating. Threre are varied shapes of stains such as a spot, a line,
and an irregulare shpae.
Anyone who can suggest a better idea?
thank you!
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