Patent ID: 8173521
Filing Date: 2012-05-08
Classification: H01L

Abstract:
1. A method for manufacturing a bonded wafer by an ion implantation delamination method including at least the steps of, bonding a bond wafer having a micro bubble layer formed by gas ion implantation with a base wafer to be a supporting substrate, delaminating the bond wafer along the micro bubble layer as a boundary to form a thin film on the base wafer, the method comprising, a first step of cleaning the bonded wafer after delaminating the bond wafer using ozone water to form an oxide film on a surface of the bonded wafer; a second step of performing rapid thermal anneal process to the bonded wafer having the oxide film under a hydrogen containing atmosphere; a third step of forming a thermal oxide film on a surface layer of the bonded wafer by subjecting to heat treatment under an oxidizing gas atmosphere and removing the thermal oxide film; a fourth step of subjecting to heat treatment under a non-oxidizing gas atmosphere.