Homebrew PCBs

On 30/03/13 21:00, Boman33 wrote:
>
> How do you mask the application not to get the soldermask on the pads?
>
>
> 

Same as for photoresist methods, print pads image onto tracing 
paper/transparency, overlay on painted board (which is covered by 
polyethylene plastic since the paint is "wet"), expose to UV for a few 
minutes, remove plastic, wipe away the remaining unexposed ink from the 
pads.




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