Patent ID: 6465295
Filing Date: 2002-10-15
Classification: H01L

Abstract:
A method of fabricating a semiconductor device, comprising the steps of:forming a abate insulating film on a surface of a semiconductor substrate; forming a polysilicon film on the gate insulating film; implanting B or BF2 impurity ions into the polysilicon film; heat-treating the polysilicon film at a temperature of 700-900Â° C. to activate and diffuse the implanted B or BF2 impurity ions; forming a silicide film on the heat-treated polysilicon film; etching the silicide film and the heat-treated polysilicon film to form a gate electrode on the gate insulating film; forming a CVD-grown dielectric film having a thickness of 5 to 1000 Ã¥ over the whole surface of the semiconductor substrate and the gate electrode; implanting B or BF2 impurity ions into the surface of the semiconductor substrate, using the gate electrode as a mask, to form source/drain regions; forming a BPSG interlayer film on the CVD-grown dielectric film; and heating the source/drain regions and the BPSG interlayer film at a temperature of 800-1050Â° C. for a period less than 3 minutes to activate the source/drain regions and to planarize the BPSG interlayer film.