On Fri, 2007-04-20 at 09:58 -0500, John Griessen wrote: > Tomaz Solc wrote: > > > I'm more interested in how you would mount any kind of device on such a > > circuit. You probably can't solder anything to paper or plastic film. > > The silver is no problem to solder to. There are now just being offered some > R&D inkjet printers with very accurate positioners and ability to handle > flat thick boards of FR-4, etc. They just start at $30K US and are > mostly custom built with different options... > > DJ and I briefly discussed how you could modify a laser printer to accept > thick flat boards > and I realized you probably can't get the xerography process to work on a > good conductor > metal surface...no charge patterning by HV and light drawing. But > modifying a > commercial throw-away inkjet to handle FR-4 would be very valuable to use > with the > silver/ascorbic acid additive conductor printing method!
I thought about this, and decided that it would work. The charge patterning is on the toner drum, and the process uses a HV charge underneath the paper to attract the toner off it. You could energise the FR4, perhaps the bottom of it. Aligning a 2-sided board would be near impossible. At one stage, I had a laser printer stripped into pieces, we needed to re-design and cut new chassis side-plates to hold the guts making the "paper" path flat. Of course, as with all interesting projects - there was never time to finish it. It never really got past the investigatory stage. Peter _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user