Don,
I have recently updated my webpage on the toner transfer procedure:
The results seem to be basically PERFECT, EVERY TIME, now. And it's extremely quick, and easy.
I give VERY detailed step-by-instructions for the complete procedure, plus the exact paper type and its source (only $0.33 per sheet!), etc.
I've also posted PHOTOS of an example board that I made, showing the paper pattern and the pcboard at various stages during and after the process.
The example board includes trace widths from almost 1/2 inch (12.7 mm) down to around 2/300ths (0.0067) inch (0.17 mm), with between-trace spacings down to about 0.0067 inch, although I think that the smallest trace-width that's actually shown in the photos is 4/300ths (0.0133) inch (about 0.34 mm).
I haven't tried making any traces or spacings that are smaller than 2/300ths of an inch, yet. But the 2/300ths-inch traces and spaces that I HAVE tried were absolutely no problem at all. And the results look excellent. (Even the little "o" characters that are part of the %-signs that are etched out of copper in very small 4-point text come out perfect. And their line/space features are even smaller than my smallest trace-widths and spacings.)
I've made at least 20 boards this way, so far, with NO bad boards.
The PCB-making-procedure webpage is at:
----------------------------------------------------
http://www.fullnet.com/u/tomg/gooteepc.htm----------------------------------------------------
OT: If anyone wants any 1-sided boards made, from ∗∗BITMAP-type∗∗ patterns that could be emailed (or mailed), my teenage son is thinking of using my method to start a small business, making pcbs, probably for about $15 or $20 for a board that's up to about 4x6 inches, with that price including the drilling of up to a couple hundred holes AND applying the silkscreen artwork (your greyscale or bitmap image) to the component side. Turnaround time would probably be zero to one day. He's been making boards for ME, and is very good at it. (And I would supervise.) If anyone's interested, or has any questions, just email me (Tom) at
tomg@... .
Regards,
Tom Gootee
http://www.fullnet.com/u/tomg-----------------------------------
----- Original Message -----
Message: 5
Date: Wed, 30 Jun 2004 23:18:46 +1000
From: "Don Bradbury" <don282@...>
Subject: Re: SCOTCH 8007
Hi Bill, many thanks for the reply I think I am to basic with my needs for most people on this board. I don't make enough boards these days to get to the level of the others and I don't like the toner transfer system I find it is to uncertain for what I need it for (10 GHz boards $1.45 sq.inch) but the same situation exists here I have a number of sq ft. of negative board and I don't know if it will still work either.
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