Patent ID: 7416959
Filing Date: 2008-08-26
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor-on-insulator semiconductor substrate comprising the steps of: providing a first crystalline silicon substrate with a surface; implanting one of oxygen and nitrogen into a region adjacent the surface of the first silicon substrate; providing a second crystalline silicon substrate with a surface; implanting a rare earth into a region adjacent the surface of the second silicon substrate and simultaneously implanting a layer of hydrogen into the second silicon substrate, the hydrogen layer being spaced from the region of rare earth in the second silicon substrate; bonding the surface of the first silicon substrate to the surface of the second silicon substrate including annealing to react the one of oxygen and nitrogen in the region adjacent the surface of the first silicon substrate with the rare earth in the region adjacent the surface of the second silicon substrate to form an interfacial insulating layer of one of rare earth oxide and rare earth nitride and the annealing also blistering the hydrogen layer; and removing a first portion of the second semiconductor substrate by cleaving at the hydrogen layer thereby leaving a second portion of the second semiconductor substrate with a surface; and processing the surface of the second portion of the second semiconductor substrate to form a thin crystalline active layer on the interfacial insulating layer.