Patent ID: 7309627

Claim:
A method for fabricating a semiconductor device, comprising: providing a silicon substrate; forming an insulator layer on a surface of the silicon substrate; forming a polysilicon layer on a surface of the insulator layer; forming a tungsten silicide layer on a surface of the polysilicon layer; forming a nitride layer on a surface of the tungsten silicide layer; forming a resist pattern on a surface of the nitride layer; patterning the nitride layer by using the resist pattern as a mask; and patterning the tungsten silicide layer and the polysilicon layer by using the nitride layer as a mask to form a gate electrode, wherein the nitride layer is deposited in a gas atmosphere of an ammonia gas and a dichlorosilane gas, a flow rate of said ammonia gas being at least twenty times a flow rate of the dichlorosilane gas.