Patent ID: 7416957
Filing Date: 2008-08-26
Classification: H01L

Abstract:
1. Method for forming a strained Si layer comprising: forming an epitaxial SiGe layer on a monocrystalline Si surface layer of a substrate, the substrate including a support layer and a buried silicon dioxide layer, the monocrystalline Si surface layer residing on the buried silicon dioxide layer; ion implanting said Si surface layer and said epitaxial SiGe layer to transform said Si surface layer into an amorphous Si layer and a portion of said epitaxial SiGe layer into an amorphous SiGe layer, a further portion of said epitaxial SiGe layer being a remaining monocrystalline SiGe layer; said amorphous Si layer, said amorphous SiGe layer and said remaining monocrystalline SiGe layer forming a layer stack on said buried silicon dioxide layer; depositing a silicon dioxide capping layer on said remaining monocrystalline SiGe layer; bonding the silicon dioxide capping layer to a silicon dioxide surface layer of a second substrate and thereafter removing said support layer and said buried silicon dioxide layer by etching.