Patent ID: 9406798
Filing Date: 2016-08-02
CPC Classification: H01L

Claim Text:
1. A device comprising: a substrate comprising silicon and having first and second walls of one or more trench isolation structures extending partially into the substrate, a substrate interface region extending between the first and second walls; a silicon germanium structure on the substrate interface region and extending over a lateral extent between the first and second walls, the silicon germanium structure having in-plane compressive stress; a buried insulation layer over the silicon germanium structure; a surface germanium layer over the buried insulation layer, wherein the surface germanium layer is formed without silicon, the surface germanium layer extending between the first and second walls and having in-plane tensile strain induced within a first portion of the surface germanium layer extending between the first and second walls, the strain induced by the edge relaxation of the silicon germanium structure; and an integrated circuit device having an active region at least partially in the first portion of the surface germanium layer.