I've not heard of stripping tin/lead with caustic...board fabricators use
nitric acid or acidic ammonium bifluoride-based strippers... I think the
latter is better for tin-lead.

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:         McMonagle, Michael R.
> Sent:         Tuesday, December 14, 1999 10:42 AM
> Subject:      Re: Removing Lead/Tin coating from copper traces
>
> You can remove the tin/lead with a strong caustic. Check Circuit
> Technology
> Corp's website at http://www.circuitnet.com/catalog/1153804.htm for Solder
> Strip, used to remove solder from contaminated gold fingers before
> replating.
>
> MikeMcM
>
> -----Original Message-----
> From: Dr. Jolyon Browne [mailto:[log in to unmask]]
> Sent: Tuesday, December 14, 1999 12:19 PM
> To: [log in to unmask]
> Subject: [TN] Removing Lead/Tin coating from copper traces
>
>
> Hi TechNetters:
>
> I would like to remove the lead/tin coating on the external traces of
> the PCB in order to expose the copper trace underneath the coating. How
> can I do this?
>
> Thanks!
>
> Jolyon
>
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