Patent ID: 7229920
Filing Date: 2007-06-12
Classification: H01L

Abstract:
1. A method of fabricating a metal silicide layer, comprising the steps of: providing a substrate having at least a gate thereon, the gate having a dielectric and a polysilicon; forming a hard mask layer over the gate but exposes the substrate; forming a first metal silicide layer on the exposed substrate, wherein the first metal silicide layer is a cobalt silicide layer or a titanium silicide layer; removing the hard mask layer to expose the gate; and forming a second metal silicide layer on the exposed gate to form a multi-layer gate structure having at least the dielectric, the polysilicon and the second metal silicide layer, wherein the second metal silicide layer is selected from a group consisting of nickel silicide, platinum silicide, palladium silicide and nickel alloy silicide.