Patent ID: 8445344
Filing Date: 2013-05-21
Classification: H01L

Abstract:
1. A method, comprising: forming a gate dielectric material above a first active region of a semiconductor device; forming the gate dielectric material above a second active region of a semiconductor device; forming a first metal-containing material selectively above the gate dielectric material in said first active region; forming a second metal-containing material above the gate dielectric material in said second active region; performing a heat treatment so as to initiate diffusion of a first species from said first metal-containing material into said gate dielectric material above said first active region and so as to concurrently initiate diffusion of a second species from said second metal-containing material into said gate dielectric material above said second active region; removing said first and second metal-containing materials to expose the gate dielectric material above the first and second active regions; forming a layer of gate electrode material above said gate dielectric material after removing said first and second metal-containing materials; and forming a first gate electrode structure above said first active region and a second gate electrode structure above said second active region from said layer of gate electrode material.