Patent ID: 6346465
Filing Date: 2002-02-12
Classification: H01L

Abstract:
A fabrication method of a semiconductor device, comprising the steps of:(a) providing a single-crystal silicon substrate having a main surface; (b) forming a dielectric film having a contact hole uncovering said main surface of said substrate on said main surface of said substrate; (c) forming a silicon nitride film on said main surface of said substrate in said contact hole of said dielectric film; (d) forming a metal film on said dielectric film to be contacted with said silicon nitride film in said contact hole of said dielectric film; said metal film having a property that an atom of said metal film serves as diffusion species in a solid-phase silicidation reaction; (e) heat-treating said metal film, said silicon nitride film, said dielectric film, and said substrate to thereby form a metal silicide film due to a solid-phase silicidation reaction between said metal film and said substrate; said metal silicide film being contacted with said main surface of said substrate in said contact hole of said dielectric film; said silicon nitride film being left on said metal silicide film; (f) forming an electrically conductive film on said dielectric film to be contacted with said silicon nitride film; said electrically conductive film being electrically connected to said substrate through said silicon nitride film and said metal silicide film in said contact hole of said dielectric film.