Patent ID: 7732312

Claim:
A method for making a fully silicided gate electrode, comprising: forming a transistor having source/drain regions, sidewalls, and a polysilicon gate electrode; forming a layer of transition metal nitride in contact with said source/drain regions, said sidewalls, and said polysilicon gate electrode; forming a Spin-On-Glass (“SOG”) layer over said source/drain regions, said sidewalls, and said polysilicon gate electrode; removing a portion of said SOG layer, wherein said removed portion is the portion of said SOG layer that is located over said polysilicon gate electrode; removing a portion of said transition metal nitride layer that is located over said polysilicon gate electrode; removing all remaining portions of said SOG layer; forming a layer of silicidation metal over said source/drain regions, said sidewalls, and said polysilicon gate electrode; performing a first silicide anneal; removing all remaining portions of said transition metal nitride layer and unreacted portions of said silicidation metal layer; and performing a second silicide anneal to fully silicide said polysilicon gate electrode.