Patent ID: 7816766
Filing Date: 2010-10-19
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a silicon substrate defined with a device region by a device isolation region and including a channel region in said device region; a gate electrode formed on said silicon substrate in correspondence to said channel region via a gate insulation film, said gate electrode carrying a pair of sidewall insulation films respectively on a pair of mutually opposing sidewall surfaces thereof; source and drain extension regions of p-type formed in said silicon substrate near respective lateral sides of said gate electrode across said channel region; source and drain regions of p-type formed in said silicon substrate near respective outer sides of said sidewall insulation films respectively in continuation with said source extension region and said drain extension region; a pair of SiGe mixed crystal regions formed near said respective outer sides of said sidewall insulation films epitaxially in said silicon substrate so as to be enclosed respectively by said source region and said drain region, each of said SiGe mixed crystal regions being grown to a level above a level of a gate insulation film interface between said gate insulation film and said silicon substrate, wherein there is provided a compressive stress film on respective top surfaces and sidewall surfaces of said pair of SiGe mixed crystal regions, said compressive stress film causing shrinkage and compressing said pair of SiGe mixed crystal regions when said compressive stress film is formed on said pair of SiGe mixed crystal regions, said pair of SiGe mixed crystal regions exerting a compressive force to said channel region as a result of compressing by said compressive stress film, tensile stress films being formed selectively between the sidewall surfaces of the pair of SiGe mixed crystal regions and the compressive stress film, and not being formed over at least a portion of the top surfaces of the pair of SiGe mixed crystal regions; wherein the tensile stress films expand the sidewall surfaces of the pair of SiGe mixed crystal regions.