Patent ID: 6281064
Filing Date: 2001-08-28
Classification: H01L

Abstract:
A method for providing dual work function doping, the method comprising:providing a semiconductor substrate, a gate insulator, a conductor comprising intrinsic polysilicon and overlying silicide layer on said semiconductor substrate and an insulating cap on said conductor;patterning said silicide layer and said insulating cap so as to etch through said silicide layer and said insulating cap while leaving a portion of said intrinsic polysilicon;providing insulating spacers comprising spacer material along sides of said silicide layer and said insulating cap and so as to rest on top of said insic polysilicon;doping first portions of said conductor with a first conductive type dopant and second portions of said conductor with a second conductive type dopant; andannealing said conductor such that dopants of said first and second conductive types spread over said respective conductors.