Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I've done some more ironing experiments. The toner is sticking to the
board very well in most areas. With a little practice, it should be
fine. Problem is that I can't get the paper off without tearing off
the traces. I've got a TQFP64 package with a bunch of parallel runs
with 5 mils between them. The toner looks fine, but the paper is
stuck in the spaces between runs. I soaked it for an hour, but can't
get the paper out of the cracks without tearing off the runs.
Larger traces with more space are no problem.
Suggestions?

Also, what do people use to touch up missing trace segments, pinholes,
etc.??? Lumocolor 313-2 would do it except that the pen tip is way
too large. If I could find a pen that would do the touch up, I'd just
plot with the pen and be done with it.

What I need is a finepoint system 0.1 pen with etch resistant ink.

How do the various etchants affect different inks? I've only used
FeCl. Are other etchants easier on the resist?

Thanks, mike