Patent ID: 7919392

Claim:
A method of manufacturing a semiconductor device, the method comprising: bonding a single-crystal silicon substrate with an insulating substrate having a surface on which an SiO 2 film is formed, wherein the single-crystal silicon substrate includes a porous silicon layer and a single-crystal silicon thin film formed on the porous silicon layer and has a surface which is on a single-crystal silicon thin film side with respect to the porous silicon layer and on which an SiO 2 film is formed, a gate insulating film and a gate electrode are formed between the single-crystal silicon thin film and the SiO 2 film on the single-crystal silicon substrate, and the surface of the insulating substrate, where the SiO 2 film is formed, is bonded with the surface of the single-crystal silicon substrate, where the SiO 2 film is formed, and separating a part of the single-crystal silicon substrate at the porous silicon layer, and removing the porous silicon layer from a remaining part of the single-crystal silicon substrate, the remaining part still being on the insulating substrate after the part is separated.