Patent ID: 8043947
Filing Date: 2011-10-25
Classification: H01L

Abstract:
1. A method for fabricating an integrated circuit, comprising: providing a hybrid orientation substrate having a first semiconductor layer with a first crystalline orientation directly bonded to a second semiconductor layer with a second crystalline orientation different from the first crystalline orientation; amorphizing a selected area of the first semiconductor layer by ion implantation, leaving a remaining area of the first semiconductor layer unamorphized; recrystallizing the amorphized selected area into the second crystalline orientation using the second semiconductor layer as a crystal template for the recrystallization; growing a sacrificial oxide layer over the first semiconductor layer by thermally oxidizing the first semiconductor layer, including over a border region at a surface of the first semiconductor layer between the recrystallized selected area and the unamorphized remaining area, whereby the thermal oxidation can encompass at least a portion of at least one of any border region defect associated with the crystal orientation differences of the recrystallized selected area and the unamorphized remaining area; removing the sacrificial oxide layer, whereby any encompassed portion of the at least one of any border region defect will be simultaneously removed, thereby reducing a lateral width of the at least one of any border region defect; and following removal of the sacrificial oxide layer, forming a shallow trench isolation region in the border region, whereby formation of the shallow trench isolation region can remove a remaining portion of the at least one of any border region defect with reduced lateral width.