A lot depends on the solder mask material. If it is dry film, for 
example, then it is possible, with an emulsion of methylene chloride in 
a 20% sodium hydroxide solution (remove and rinse as soon as the coating 
crinkles). If it is based on an epoxy (and many are) it is clearly 
impossible for a solvent to differentiate between a cured mask and the 
substrate and you would cause much more harm than good.

Brian

Tim Mack wrote:
> All,
> 
>  
> 
> I have run into an issue with a board that has solder mask covering some
> pads.  Is there a product/solvent that can remove the solder mask easily
> with out etching the copper?  I would rather chemically remove it than
> manually scrap it off with a razor blade.
> 
>  
> 
> Thanks in advance,
> 
>  
> 
> Tim Mack
> 
> Research Engineer
> 
> NDSU CNSE
> 
> www.ndsu.edu/cnse
> 
>  
> 
> 
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