- Apr 21, 2012
hey no sweat bro
Why? You don't need UV for etching PCBs. 405 will work just fine for exposing photoresist. Other option is to use a bunch of power, a paint layer on the board and just burn off the paint layer to form your mask.i have a good friend looking for a UV laser for etching PCBs. this is going to break his little heart.
It works just fine that way, without any sort of masking.405nm is very close to UV though - Most PCB photoresists will be very well exposed by 405nm. I do wonder though if it's going to be enough to simply target the laser in that case without masking off the rest of the board - any splash, beam artifacts or reflections and the rest of the photoresist may get partially exposed.