Patent ID: 7737503
Filing Date: 2010-06-15
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; an n-channel MIS transistor including: a p-type semiconductor region formed on the substrate; first source/drain regions being formed in the p-type semiconductor region and being separated from each other; a first gate insulating film having a material layer made of a material having no crystal grain boundaries formed on the p-type semiconductor region between the first source/drain regions; and a first gate electrode having a stack structure formed with a first Al layer, a first metal layer and a second Al layer, the first Al layer being formed on the first gate insulating film, the first metal layer being formed on the first Al layer and being made of a first metal being different from Al, and the second Al layer being formed on the first metal layer; and a p-channel MIS transistor including: an n-type semiconductor region formed on the substrate and isolated from the p-type semiconductor region; second source/drain regions being formed in the n-type semiconductor region and being separated from each other; a second gate insulating film formed on the n-type semiconductor region between the second source/drain regions; and a second gate electrode being formed on the second gate insulating film and having a second metal layer being made of the first metal.