The best system I've seen described used a mill to cut slots for the traces, then you squeegie in some solderable polymer and bake it. The best part was, you get through-vias for free because of the way you do the drilling.
I couldn't find anyone actually making the machines though. _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user