I've always thought it would be interesting to do "build up" boards with an inkjet of conductive ink and insulating ink. You'd put down one layer, then cover the traces with a slightly wider insulating layer, then put down your next layer, etc. The trick is connecting components to the conductive ink. Harold -- FCC Rules Updated Daily at http://www.hallikainen.com - Advertising opportunities available! -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist