Patent ID: 8030711
Filing Date: 2011-10-04
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate having an nMIS formation region and a pMIS formation region; a high dielectric gate insulating film formed on the nMIS formation region and the pMIS formation region, the high dielectric gate insulating film having a dielectric constant higher than silicon oxide; a first metal film formed on the high dielectric gate insulating film on the pMIS formation region, the first metal film not containing silicon and germanium; a second metal film formed on the high dielectric gate insulating film on the nMIS formation region and on the first metal film, the second metal film containing at least one of silicon and germanium; and a conductive film formed on the second metal film, the conductive film having a resistance lower than resistances of the first metal film and the second metal film, no silicon being present at an interface between the high dielectric gate insulating film and the first metal film in the pMIS formation region.