Patent ID: 8927363
Filing Date: 2015-01-06
Classification: H01L

Abstract:
1. A method comprising: obtaining a semiconductor on insulator substrate comprising a semiconductor layer that comprises crystalline silicon; epitaxially growing a layer comprising germanium on the semiconductor layer; removing a portion of the layer comprising germanium from the semiconductor layer to form a first region wherein the semiconductor layer is uncovered by the layer comprising germanium and a second region wherein the semiconductor layer is covered by the layer comprising germanium; forming a silicon germanium layer in the second region from the semiconductor layer and the epitaxially grown layer comprising germanium; forming a shallow trench isolation region on the substrate subsequent to epitaxially growing the layer comprising germanium; forming first source/drain regions on the semiconductor layer in the first region, and forming second source/drain regions on the silicon germanium layer in the second region and electrically isolated from the first region by the shallow trench isolation region.