Patent ID: 7986029
Filing Date: 2011-07-26
Classification: H01L

Abstract:
1. A semiconductor structure comprising: a first semiconductor layer having a first crystal orientation; a second semiconductor layer having a second crystal orientation, the second crystal orientation being different from the first crystal orientation; a first insulator layer underlying substantially all of the first semiconductor layer; a second insulator layer underlying substantially all of the second semiconductor layer, the first insulator layer and the second insulator layer having substantially equivalent thicknesses and being different portions of a single layer; a first isolation structure between the first semiconductor layer and the second semiconductor layer, the first isolation structure being directly over the first insulator layer; and a second isolation structure between the first semiconductor layer and the second semiconductor layer, the second isolation structure being adjacent to the first isolation structure, top surfaces of the first isolation structure and the second isolation structure being coplanar, and a bottom surface of the second isolation structure extending farther from the top surfaces than a bottom surface of the first isolation structure, the first isolation structure directly contacting a top surface of the first insulator layer.