Patent ID: 7803670
Filing Date: 2010-09-28
Classification: H01L

Abstract:
1. A method for fabricating a dual substrate semiconductor structure, comprising: forming a first semiconductor layer having a first crystal orientation; forming a second semiconductor layer over at least part of the first semiconductor layer, wherein the second semiconductor layer is electrically isolated from the first semiconductor layer and has a second crystal orientation that is different from the first crystal orientation; forming a shallow trench isolation region in a first trench opening that exposes the first semiconductor layer in a first area by filling the first trench opening with an insulating material; then forming a second trench opening in the shallow trench isolation region that exposes the first semiconductor layer in a second area contained within the first area; then epitaxially growing a first epitaxial semiconductor material on at least an exposed surface of the first semiconductor layer to form a first epitaxial semiconductor layer; and patterning and etching the first epitaxial semiconductor layer and the second semiconductor layer to form one or more FinFET channel regions.