Tuesday, December 2, 2008
A 30 Degree Conical Burr was used as the cutting tool mounted in a CNC mill to cut a copper clad board.
The cutting path produced is approximately 0.5mm wide, so it should be possible to produce layouts for SOIC and other surface mount footprints. Smaller separation between pads may be possible as the 1oz copper pour is only about 1.4 mils thick.
Canned air worked fairly well to remove the copper debris from where the path was cut and this looks like an interesting calculator for PCB trace widths.
Tomorrow's experiment will be to manufacture an actual circuit board and to test how well nail polish acts as a solder mask.