Patent ID: 6361912
Filing Date: 2002-03-26
Classification: H01L

Abstract:
A method for applying metallic toner onto an amorphous semiconductor layer with the objective of selective area crystallization, said method comprising the steps of:(a) exposing a photo-sensitive surface to cause exposed areas of said surface to crosslink and exhibit an increase in resistivity in comparison with unexposed areas of said photo-sensitive surface; (b) charging said photo-sensitive surface, said exposed areas of said photo-sensitive surface retaining a charge longer than said unexposed areas; (c) applying a toner to said photo-sensitive surface, said toner attracted by retained charge on said exposed areas; (d) juxtaposing said photo-sensitive surface toned in step (c) to a layer of amorphous semiconductor and applying an electric field therebetween to cause said toner that is adherent to said photo-sensitive surface to migrate to said amorphous semiconductor layer; and (e) annealing said toned amorphous semiconductor layer to enable formation of polycrystalline semiconductor only in areas where said toner is adherent.