The high power necessary to evaporate the copper layer will burn the substrate for sure. Cristian At 16:16 12/11/02 PST, you wrote: >I believe LPKF does has a laser-based version of the PCB router (burns AWAY >copper by laser...) >BillW -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads