Patent ID: 7241647
Filing Date: 2007-07-10
Classification: H01L

Abstract:
1. A method of forming a semiconductor structure comprising: providing a wafer having a semiconductor on insulator (SOI) configuration, the wafer including a first semiconductor layer over an insulator, the first semiconductor layer is made of at least two components, the first semiconductor layer includes a first portion overlying a second portion of the first semiconductor layer, wherein the first portion includes a first concentration of greater than zero percent of a first component of the at least two components and wherein the second portion includes a second concentration of greater than zero percent of the first component of the at least two components, further wherein the first concentration is less than the second concentration; and after the providing the wafer, performing a condensation process on the first semiconductor layer to consume a portion of the first semiconductor layer and to form a material including a second component of the at least two components over a remaining portion of the first semiconductor layer; removing the material; forming a second semiconductor layer including the second component over the remaining portion after the removing the material.