Patent ID: 7217636

Claim:
A method of fabricating a semiconductor-on-insulator semiconductor wafer comprising the steps of: providing a first semiconductor substrate; selecting a first material from a group consisting of SiO 2 , Si 3 N 4 , poly Si, and combinations thereof; forming a first insulating layer of the first material on a surface of the first semiconductor substrate, forming the first insulating layer with a first predetermined stress; providing a second semiconductor substrate; selecting a second material from a group consisting of TiSi 2 , CoSi 2 , TaSi 2 , rare earth oxides, rare earth nitrides, rare earth phosphides, rare earth silicides, and combinations thereof; forming a second layer of the second material on a surface of the second semiconductor substrate, forming the second layer with a second predetermined stress different than the first predetermined stress; bonding the first insulating layer to the second layer to form a composite insulating layer bonding the first semiconductor substrate to the second semiconductor substrate; and removing a portion of one of the first semiconductor substrate and the second semiconductor substrate to form a thin crystalline active layer on the composite insulating layer.