Patent ID: 8563401

Claim:
A method for manufacturing an SOI substrate by forming an SOI layer on a surface of a transparent insulating substrate, the method comprising, in the following order, the steps of: implanting ions into a silicon wafer or, a silicon wafer with an oxide film from a surface thereof so as to form an ion-implanted layer; subjecting at least one of the surface of the transparent insulating substrate and the surface of the ion-implanted silicon wafer or the silicon wafer with an oxide film to a surface activation treatment; bonding together the silicon wafer or the silicon wafer with an oxide film and the transparent insulating substrate; subjecting the bonded wafer to a heat treatment at 150° C. or higher but not higher than 350° C. so as to obtain a laminate; and irradiating visible light used for an RTA (Rapid Thermal Anneal) at a temperature of 150° C. or higher but not higher than 350° C. at a side of the transparent insulating substrate of the laminate toward the ion-implanted layer of the silicon wafer or the silicon wafer with an oxide film to embrittle an interface of the ion-implanted layer and transfer a silicon thin film to the transparent insulating substrate so that the SOI layer can be formed while avoiding thermal delamination.