exposed copper with no surface finish?
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djwidow420 2 months ago
hi, is it possible to have the copper exposed on a pcb with no surface finish (no HASL or ENIG), so  bare copper?
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andyfierman 2 months ago
I suspect JLCPCB would be very reluctant to offer this even as a special request because it will corrode in no time. If you are worried about the additional thickness of plating compared to bare copper then ENIG is negligible.
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pcb_Service 1 month ago
 @ [djwidow420](https://easyeda.com/djwidow420) , No surface finish is OK, just leave your solder mask layer blank. But copper exposed on a PCB is not supported, it must be covered with solder stop mask.
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