Patent ID: 9076669
Filing Date: 2015-07-07
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first gate insulation film on a substrate, the first gate insulation film including a first material selected from the group consisting of HfO a first barrier film on the first gate insulation film, the first barrier film including a second material selected from the group consisting of HfON, HfSiON, ZrON and ZrSiON; a first gate electrode on the first barrier film; n-type source/drain regions in the substrate at both sides of the first gate electrode; a second gate insulation film on the substrate, the second gate insulation film including a third material selected from the group consisting of HfO a second barrier film on the second gate insulation film, the second barrier film including a fourth material selected from the group consisting of HfON, HfSiON, ZrON and ZrSiON; a second gate electrode on the second barrier film; and p-type source/drain regions in the substrate at both sides of the second gate electrode, wherein lanthanum (La) is included in the first gate insulation film and the first barrier film is free of La.