Patent ID: 7651901
Filing Date: 2010-01-26
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a high dielectric gate insulating film in an nMIS formation region and a pMIS formation region of a semiconductor substrate, the high dielectric gate insulating film having a dielectric constant higher than a dielectric constant of silicon oxide; forming a first metal film directly on the high dielectric gate insulating film, the first metal film not containing silicon and germanium; removing the first metal film in the nMIS formation region; forming a second metal film on the high dielectric gate insulating film of the nMIS formation region and on the first metal film of the pMIS formation region, the second metal film containing at least one of silicon and germanium, such that no silicon or germanium is present at an interface between the high dielectric gate insulating film and the first metal film in the pMIS formation region; and processing the first metal film and the second metal film.