Patent ID: 7910415

Claim:
A method of manufacturing a semiconductor device, the semiconductor device including a substrate; an insulating film formed on the substrate; a first semiconductor layer in which strain is induced in directions parallel to a surface of the substrate, the first semiconductor layer being on the insulating film; a source region and a drain region formed in the first semiconductor layer; and a gate layered body formed of a gate insulating film and a gate electrode on the first semiconductor layer, the method comprising: forming a second semiconductor layer by epitaxial growth on the first semiconductor layer; heating the second semiconductor layer; removing the second semiconductor layer; and overetching a surface of the first semiconductor layer from which the second semiconductor layer has been removed, wherein the second semiconductor layer is different in lattice constant in an in-plane direction from the first semiconductor layer; said heating the second semiconductor layer induces the strain in the first semiconductor layer by exposing a surface of the second semiconductor layer to energy lines; the second semiconductor layer comprises a layered body having a plurality of layers; and a first one of the layers of the layered body at a surface thereof comprises a material higher in absorbance of the energy lines than a second one of the layers of the layered body in contact with the first semiconductor layer.