Patent ID: 8975700
Filing Date: 2015-03-10
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate, which comprises a base layer, an insulating layer, and a semiconductor layer, the insulating layer being on the base layer, and the semiconductor layer being on the insulating layer; and a first transistor and a second transistor, which are formed on the substrate, the first and second transistors being isolated from each other by a trench isolation structure in the substrate, wherein at least a part of the base layer under at least one of the first and second transistors is strained, and the strained part of the base layer is adjacent to the insulating layer, and wherein the trench isolation structure comprises a stress film and a dielectric material, the stress film being on the bottom and an inner wall of the trench of the trench isolation structure, and the dielectric material being on the stress film to fill the trench of the trench isolation structure.