Patent ID: 6881650
Filing Date: 2005-04-19
Classification: H01L

Abstract:
1. A method for forming a SOI substrate comprising: forming a relaxed silicon-germanium layer on a first silicon substrate using an epitaxial growth method; forming a porous silicon-germanium layer on the first silicon substrate including the relaxed silicon-germanium layer; forming a silicon-germanium epitaxial layer on the porous silicon-germanium layer; forming an oxide layer on a second silicon substrate; bonding the second silicon substrate where the oxide layer is formed to the first silicon substrate where the silicon-germanium epitaxial layer is formed to be in contact with each other; removing the first silicon substrate, the relaxed silicon-germanium layer, and the porous silicon-germanium layer to expose the silicon-germanium epitaxial layer; and forming a strained silicon-epitaxial layer on the silicon-germanium epitaxial layer.