David Griffith <
dgriffi@...> writes:
> One of the things that is driving me to the photo process is that
> I'd like to do double-sided boards sometime. It seems a bit easier
> to get the two layers registered properly by taping two stencils
> together to make a pouch.
I have a special footprint in my library that, when printed on
transparency, results in a fine-line crosshair in the same spot on all
layers. I print one layer on plain paper and use it to drill out
those spots on the pcb with 13 mil holes, then I have an easy visual
target to use to align each film to each side of the pcb.