Patent ID: 7358147
Filing Date: 2008-04-15
Classification: H01L

Abstract:
1. A process for producing an SOI wafer in which an ion implantation layer is formed via an insulating film on a wafer that is to be used as an active layer by implanting ions of hydrogen or a rare gas element, the wafer for the active layer is then bonded via an insulating film on a base wafer so as to form a bonded wafer, and the bonded wafer is then heat processed and is cleaved with the ion implantation layer taken as a boundary, wherein after the SOI wafer has been formed by heat processing the bonded wafer and then cleaving it off taking the ion implantation layer as a boundary, oxidization processing is performed on the SOI wafer so that an oxide film having a predetermined thickness is formed on the surface of the SOI layer, this oxide film is then removed, and the SOI wafer is subsequently heat treated in an inert gas atmosphere.