Patent ID: 7078345
Filing Date: 2006-07-18
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: forming a diffusion region by introducing an arsenic impurity into an element region of a silicon substrate, which is isolated by an element isolating insulation film, to a concentration of 1×10 depositing nickel metal over the entire top surface of the silicon substrate; heat-treating said silicon substrate having said nickel metal deposited thereon at a first temperature of less than 400° C. while leaving said nickel metal on the surface of said element isolating insulation film, thereby forming a nickel silicide film containing di-nickel silicide (Ni removing an unreacted portion of said nickel metal deposited on said element isolating insulation film; heat-treating said silicon substrate having said unreacted nickel metal removed therefrom at a second temperature of 450° C. or more, thereby forming a nickel monosilicide (NiSi) film having an arsenic compound layer on a surface thereof; etching away said arsenic compound layer by using an alkaline liquid; depositing an interlayer insulating film over the entire top surface of said silicon substrate; and forming a wiring layer piercing through said interlayer insulating film.