Homebrew PCBs

--- Russell Shaw <rjshaw@...> wrote:
> Hi all,
> 
> What methods do back-yarders use to get the sharpest
> PCB tracks? Photographic? Milling?

I've never done PCB milling, but I have done
photographic. And it is very sharp and professional
looking, professional looking as your mask. I've used
both positive precoated boards and spray-it-yourself
negative. Both have good and bad points, mostly
overcome by computer aided drafting.

I've used drafting tape and those rub-on shapes, and
I've used photocopies on mylar but I usually had to
repair the masks (pinholes). Anyone remember that blue
film? It was on a backing and you cut out parts of it
with an Xacto knife to create a mask. A real pain in
the neck, I hated the stuff. Just try and cut out IC
pads with an Xacto.

Steve Greenfield


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