Path: utzoo!attcan!uunet!lll-winken!ames!xanth!nic.MR.NET!csd4.milw.wisc.edu!bbn!apple!voder!tolerant!procase!bauer
From: bauer@procase.UUCP (Jerry Bauer)
Newsgroups: sci.electronics
Subject: Printed Circuit Boards
Keywords: Plotter
Message-ID: <4115a910.14dd6@c>
Date: 26 Jan 89 00:33:00 GMT
Organization: proCASE Corporation, Santa Clara, CA
Lines: 31


The plot thickens...

I used to make a mask (for each side) at 2x, have it photographically
reduced and copied to film (at a local printshop) and do the
photoresist/expose/rinse/etch routine. 

I made the masks using the Bishop Graphics (or whomever) pads, edge
connectors, etc. and tape.

The first IDEA occurred when I decided to write a p.c.  board drafting
program for my Apple //e.  I figured it would be easier to draw it there
than with the tape and stuff, and run it off on my plotter.  From there,
it would be back to the copy-to-film/photoresist/expose/rinse/etch routine. 

The second IDEA (and this is where it is today) was to make an adapter
for a resist pen to fit in the plotter and draw directly to the board. 
This works great - even for two-sided boards (accurate registration is
important, of course).  The processing consists of draw/plot/etch.

Well, that's it.  The computer is an Apple //e, the plotter is a
Mannesman-Tally PIXY-3.  The code is home-grown. 

So, does anybody have a quick, cheap way to do plated-through holes?



-- 
JRBauer (Jerry) ...!tolerant!procase!bauer
                ...!hpda!procase!bauer
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