Patent ID: 7892934

Claim:
A method for manufacturing an SOI substrate by bonding, characterized by comprising: forming a hydrogen ion implantation layer at an average ion implantation depth L on one principal surface of a single crystal silicon substrate; subjecting at least one of one principal surface of a transparent insulating substrate and the one principal surface of the single crystal silicon substrate to surface treatment; bringing the one principal surface of the single crystal silicon substrate and the one principal surface of the transparent insulating substrate into close contact with each other; bonding the single crystal silicon substrate and the transparent insulating substrate by heating the single crystal silicon substrate and the transparent insulating substrate at a temperature of 350° C. or below while the single crystal silicon substrate and the transparent insulating substrate are in close contact with each other; and mechanically peeling a single crystal silicon thin film along a crystal surface at a position equivalent to the average ion implantation depth L and forming an SOI layer on the transparent insulating substrate.