Patent ID: 6881631
Filing Date: 2005-04-19
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a first conductive material film on a semiconductor substrate with a gate insulating film interposed therebetween; selectively forming a second conductive material film on the first conductive material film, the second conductive material film being capable of reducing the first conductive material film; causing that portion of the first conductive material film which is selectively covered with the second conductive material film to be subjected to a reducing reaction with the second conductive material film so as to change the composition of the resultant film and to form a third conductive material film differing in the work function from the first conductive material film; and forming a first gate electrode having the first conductive material film and a second gate electrode having at least the third conductive material film and differing from the first gate electrode in the work function.