Patent ID: 9212049
Filing Date: 2015-12-15
Classification: B81B,B81C,H01L

Abstract:
1. A method of manufacturing a SOI wafer including a support wafer grown as a single piece and an active layer wafer which are bonded together with an oxide film therebetween, each of the support wafer and the active layer wafer being a silicon wafer, the method comprising: forming a cavity in a first surface of the support wafer, the first surface being a bonding surface of the SOI wafer; forming a gettering material on a surface of the support wafer on a side opposite to the first surface; carrying out thermal oxidation of one of the support wafer and the active layer wafer; bonding together the first surface of the support wafer and the active layer wafer; and carrying out bonding reinforcing heat treatment with respect to the support wafer and the active layer wafer which are bonded together; wherein the oxide film is continuous across the first surface.