Patent ID: 7833878

Claim:
A method for manufacturing an SOI substrate, characterized by comprising: a first step of forming a hydrogen ion-implanted layer on a surface of a first substrate which is a single-crystal silicon substrate; a second step of applying a surface activation treatment to at least one surface of a second substrate and the surface of said first substrate, wherein said second substrate is a transparent insulating substrate which is one of a quartz substrate, a sapphire (alumina) substrate, a borosilicate glass substrate, and a crystallized substrate; a third step of bonding together the surface of said first substrate and the surface of said second substrate, and which includes heat-treating said first substrate and said second substrate at 100 to 300° C. after said bonding together, with said first and second substrates bonded together; and a fourth step of forming an SOI layer on the surface of said second substrate by irradiating light having a wave number range including an Si—H bond absorption band at said bonded substrate to peel off a silicon layer from said first substrate.