Patent ID: 7619239

Claim:
A semiconductor device comprising: an insulating film; a non-strained SiGe layer formed on the insulating film; a strained Si layer formed on the non-strained SiGe layer, having a biaxial tensile strain; a strained SiGe layer formed on the insulating film such that the strained SiGe layer is longer in a uniaxial direction parallel to a surface of the insulating film than in a direction parallel to the surface of the insulating film and perpendicular to the uniaxial direction, the strained SiGe layer having a uniaxial compression strain along the uniaxial direction; an n-channel Metal-Insulator Semiconductor (MIS) transistor formed on the strained Si layer, and the strained Si layer used as a channel of the n-channel MIS transistor; and a p-channel MIS transistor formed on the strained SiGe layer, the strained SiGe layer used as a channel of the p-channel MIS transistor, and the p-channel MIS transistor having a channel length direction the same as the uniaxial direction of the uniaxial compression strain.