They think the plated gold (!) is reacting with a ferric chloride (if that's
what it is) microetch? Gold is pretty non-reactive--that's why its called a
noble metal. Are they proposing galvanic corrosion of the Cu? Are you sure
about the amount of copper present going into the bath?
I will definitely follow this thread with interest.

Timothy Reeves
ECD Circuit Board Division
13626 South Freeman Road
Mulino, OR 97042
[log in to unmask]
(503) 829-9108 (800) 228-8198  FAX (503) 829-5482



> ----------
> From:         Franklin
> Sent:         Friday, October 8, 1999 12:51 PM
> Subject:      Micro-etch attacking copper when gold tabs are involved
>
> Okay brainiac's, here's a stumper.
>
> From our supplier, they believe the gold is reacting with chemistry in the
> micro-etch bath??????
>

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