Homebrew PCBs

Lee Studley <indigo_red@...> writes:
> Thanks for sharing the results! Could you put some pictures up if
> you have time?  I'd like to see the undercutting and the board.

I've already stripped the mask, but with back-lighting through the
microscope it was pretty easy to see what was happening.  I'm thinking
of re-etching that board if I can figure out how to avoid the problem
the next time around.  There were too many of the 6 mil traces that
etched through to bother fixing.

Between the software to print the film and the vaccum to hold it
against the board, I don't think the exposure is the problem.  I still
need to reliably get the film on the blank board (no bubbles), and
figure out developing and etching methods that "always work" without
under- or over- developing or etching.