Patent ID: 9076840
Filing Date: 2015-07-07
Classification: H01L

Abstract:
1. A method for manufacturing a bonded SOI wafer comprising: ion-implanting gas ions of at least one kind of hydrogen ions and rare gas ions from a front surface of a bond wafer consisting of a silicon single crystal to form an ion-implanted layer within the bond wafer; bonding together the ion-implanted side front surface of the bond wafer and a front surface of a base wafer via an insulator film; thereafter delaminating a part of the bond wafer along the ion-implanted layer so as to have an SOI layer on the base wafer; and performing a first sacrificial oxidation treatment on the bonded SOI wafer in which the delamination has been performed after a first rapid thermal annealing (RTA) treatment has been performed thereon and thereafter performing a second sacrificial oxidation treatment thereon after a second RTA treatment has been performed thereon, wherein: