Electrophotographic patterning of thin-film silicon on glass foil

We report the patterning of thin films of amorphous silicon (a-Si:H) using electrophotographically applied toner as the etch mask. Using a conventional xerographic copier, a toner pattern was applied to 0.1 μm thick a-Si:H films deposited on /spl sim/50 μm thick glass foil. The toner then served as the etch mask for a-Si:H, and as the lift-off material for the patterning of chromium. This technique opens the prospect of roll-to-roll, high-throughput patterning of large-area thin-film circuits on glass substrates.