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From: johnm@hpcvra.HP.COM (John McVey)
Newsgroups: sci.electronics
Subject: PCB help wanted.
Message-ID: <4110001@hpcvra.HP.COM>
Date: Wed, 22-Apr-87 11:58:48 EST
Article-I.D.: hpcvra.4110001
Posted: Wed Apr 22 11:58:48 1987
Date-Received: Sat, 25-Apr-87 01:03:45 EST
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 22

I would like to find a way to do simple PC boards cheaply
and quickly.

So far I have tried using a 'RESIST' pen in a flat-bed
plotter and having the graphics system plot the pattern
directly onto the copper board.  I then etch in ammonium
sulfate.  This works better than you might think, but
the problem is getting the 'RESIST' pen to do its job.

I would like to try plotting on transparency film (again
at 1:1 scale) and then try using some photo resist.  Can
anyone suggest where to by the stuff and describe its
use.

I know that I am approaching this whole idea with a crude
methodology, but I would like to avoid the darkroom
hassles of reduction and high contrast films.

Thanks in advance.

John McVey
hplabs!hp-pcd!johnm