Scott,
    I'm trying to etch off solder plated on copper. Is there any etch which will
etch both Copper and Solder?
Thanks for your input.
Yasmeen
[log in to unmask] wrote:

> Yasmeen,
>
> Are you trying to etch solder, or are you etching copper using the solder as
> an etch resist?
>
> If you are using solder as an etch resist, you can use ammoniacal etch.
> Which can be purchased from a variety of suppliers.
>
> If you are etching solder (or tin/lead plating) then you can either use a
> peroxide or a ferric nitrate based tin stripper.  Both will work, and again,
> can be purchased from a variety of suppliers.
>
> If more help is needed feel free to ask.
>
> Scott Griggs
> Senior Applications Engineer
> RBP Chemical Corp.
> (612) 825-6113

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