Patent ID: 7816739
Filing Date: 2010-10-19
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first semiconductor layer; an n-type second semiconductor layer which is formed on the first semiconductor layer and has an oxidation rate which is lower than an oxidation rate of the first semiconductor layer; p-type third semiconductor layers which are formed spaced apart from each other on the first semiconductor layer to sandwich the second semiconductor layer and have a bottom portion deeper than that of the second semiconductor layer, a lattice constant of the second semiconductor layer being less than a lattice constant of the third semiconductor layer; and a first gate electrode which is formed on the second semiconductor layer between the neighboring third semiconductor layers with a first gate insulation film interposed between the second semiconductor layer and the first gate electrode, wherein the second semiconductor layer has a lattice constant inherent to a material, of which the second semiconductor layer is formed, and a lattice constant of the first semiconductor layer is less than the lattice constant of the third semiconductor layer.