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

Hi,

I contacted Rod Grantham of www.granthams.com who sells a uv
curable pattern resin. I thought that there might be a chance that
one could use a plotter to draw the lines on the copper and when done
expose the board to uv to set the resin. I recieve the following
reply and thought that his info might be valuable to those of you
working on this problem. I am going to see if I can locate some of
the ink he mentions and give it a try.

Jack




Hello Jack

Using the pattern resin for a resist will not work. The resin
is about the consistency of honey and would not flow
thorough a plotter pen.

We have made a printing plate with the 40 durometer resin
and printed directly on copper clad boards. Using rubber base
ink in our letterpress and etching with feric chloride works
great. It's only practical for 20 boards or more.

Some of the transfer methods, like PNP that use a print
from a laser that is heat transfered to the copper clad
board with a dry mounting press is something for you to consider
if your traces are quite bold.

The ink used for screen printing circuit boards might
work in your plotter pen. Nazdar makes an ink formulated
just for what you are trying to do. Although any poster ink
would likely work. It's someting for you to think about.

That's about all the help I can offer.

Rod Grantham
www.granthams.com