Patent ID: 7361561
Filing Date: 2008-04-22
Classification: H01L

Abstract:
1. A method of forming a semiconductor device, comprising: providing a semiconductor substrate; forming a first high-k dielectric layer over the semiconductor substrate; forming a metal-containing layer over the first high-k dielectric layer; forming a polysilicon layer over the metal-containing layer; patterning the polysilicon layer to form a polysilicon gate structure; depositing a layer of material over the polysilicon gate structure; etching the layer of material to form a sidewall spacer on the polysilicon gate structure and to result in an exposed portion of the metal-containing layer; etching the exposed portion of the metal-containing layer to form a metal gate structure; and forming a first doped region in the substrate on a first side of the metal gate structure and a second doped region in the substrate on a second side of the metal gate structure.