Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!rutgers!labrea!decwrl!pbsvax.dec.com!halbert From: halbert@pbsvax.dec.com (Dan Halbert HLO2-3/M08 DTN 225-6305) Newsgroups: sci.electronics Subject: TEC-200 photocopier PC pattern transfer material Message-ID: <10779@decwrl.DEC.COM> Date: Tue, 7-Jul-87 15:24:19 EDT Article-I.D.: decwrl.10779 Posted: Tue Jul 7 15:24:19 1987 Date-Received: Fri, 10-Jul-87 06:31:37 EDT Sender: daemon@decwrl.DEC.COM Organization: Digital Equipment Corporation Lines: 25 I have used the TEC-200 PC board photocopier film which mjj mentioned in a previous message. It works approximately as advertised, but I have had the following problems with it: 1. If your photocopier does not produce dense black output, you will not get a dense, gap-free transfer onto the PC board. The instructions that come with the film say that the the transfer process (done with a hot clothes iron) will tend to fill in the gaps, but this doesn't work perfectly. I had to go over the pattern with a resist marking pen. I would have used a better copier, but it would not take the film in its paper feeder. 2. The transfer will be a mirror image of what was copied. In most cases, you must therefore make an intermediate transparency. This compounds problem 1. 3. My copier apparently does not copy exactly 1:1, so the spacing on IC sockets, etc. was not exactly right. Again, problem 2 will make this worse. My IC socket had to have its pins splayed. 4. Completely transferring the pattern with the iron takes a little practice. The film looks like overhead transparency film. I have tried some kinds we have around the office, but without much success. But there may be certain brands that work better. --Dan Halbert