Patent ID: 6830962
Filing Date: 2004-12-14
Classification: H01L

Abstract:
A method of forming an integrated semiconductor structure comprising:providing an SOI substrate comprising a top semiconductor layer of a first crystallographic orientation and a bottom semiconductor layer of a second crystallographic orientation separated by an insulating layer, said first crystallographic orientation is different from said second crystallographic orientation; forming at least one opening in the SOI substrate that exposes a surface of the bottom semiconductor layer; growing a semiconductor material on said exposed surface of the bottom semiconductor layer, said semiconductor material having a crystallographic orientation that is the same as the second crystallographic orientation; forming a buried insulating region in said semiconductor material by ion implantation and annealing, said buried insulating region separates the semiconductor material from said bottom semiconductor layer; and planarizing the implanted semiconductor material to provide a structure in which the semiconductor material having the second crystallographic orientation is substantially coplanar and of substantially the same thickness as that of the top semiconductor layer.