Llamarama
Member
Hello everyone, I need to make a double sided PCB however my exposure unit is only single sided. It has a piece of grey foam that holds the pcb in place once the lid is closed. I'm worried that the light may bleed through and double expose the side I expose first after flipping it over.
I've had a think and have come up with these;
1 - Expose one side, then flip, leaving the artwork attatched.
2 - Expose one side then flip over after placing piece of black paper between foam and board.
3 - Only remove one side of protective film, expose that side, develop, then flip and repeat.
4 - Leave exposure unit open and place block of black foam with a book or something to keep artwork flat.
5 - Something completely different
I have via rivets for the through board connections and pretty much everything else, I'm just double and triple checking because this is my last piece of photo etch PCB and I don't really want to go and buy more till next weekend if it can be avoided.
Thanks for any help - Mike
I've had a think and have come up with these;
1 - Expose one side, then flip, leaving the artwork attatched.
2 - Expose one side then flip over after placing piece of black paper between foam and board.
3 - Only remove one side of protective film, expose that side, develop, then flip and repeat.
4 - Leave exposure unit open and place block of black foam with a book or something to keep artwork flat.
5 - Something completely different
I have via rivets for the through board connections and pretty much everything else, I'm just double and triple checking because this is my last piece of photo etch PCB and I don't really want to go and buy more till next weekend if it can be avoided.
Thanks for any help - Mike