Patent ID: 6534390
Filing Date: 2003-03-18
Classification: H01L

Abstract:
A method for forming semiconductor device comprising:providing a substrate; forming a gate dielectric layer over said substrate; forming a gate layer over said gate dielectric layer; forming a cap layer over said gate layer; creating a lightly doped source/drain region in the substrate, and not under the gate dielectric layer; forming spacers on the sidewalls of said gate dielectric layer, and said gate layer, and said cap layer to form an intermediate structure; forming a deep source/drain region in said substrate and under said lightly doped source/drain region; annealing to activate the dopants; removing the cap layer; depositing a silicon film over said intermediate structure; depositing a metal layer over said silicon film; forming a silicide layer from the silicon film and the metal layer by using laser irradiation; subjecting the silicon body to a heat treatment to convert the silicide regions into low-resistivity silicides; depositing an interlevel dielectric layer over said silicide layer; chemical-mechanical polish (CMP) said interlevel dielectric layer, said spacers and said silicide to break the continuity of the silicide film to create a source/drain silicide film and a gate silicide film.