Patent ID: 7696575

Claim:
A semiconductor device of complementary structure comprising: a semiconductor substrate including: (i) a first planar semiconductor region whose major surface is formed into a shape of a rectangle or a parallelogram and having compressive stress in a first direction along the major surface of the semiconductor region and tensile stress in a second direction along the major surface different from the first direction; and (ii) a second planar semiconductor region whose major surface is parallel to the major surface of the first planar semiconductor region and formed into a shape of a rectangle or a parallelogram and having tensile stress in the first direction along the major surface and compressive stress in the second direction along the major surface; a field effect transistor of a first conductivity type formed on each major surface of the first planar semiconductor region and the second planar semiconductor region and including source and drain regions separately arranged along the direction of compressive stresses; and a field effect transistor of a second conductivity type formed on each major surface of the first planar semiconductor region and the second planar semiconductor region and including source and drain regions separately arranged along the direction of tensile stresses.