Patent ID: 8802534

Claim:
A method for forming an SOI substrate comprising: setting a base substrate on an upper support base; setting a bond substrate on entire surfaces of which an insulating layer is formed and which comprises a microbubble region to a lower support base so that at least an end portion of the bond substrate extends beyond the lower support base; making the bond substrate close to the base substrate with the bond substrate inclined toward a setting surface of the base substrate so that part of the end portion of the bond substrate is in contact with the base substrate; making the part of the end portion of the bond substrate be in contact with the base substrate and applying pressing force to a contact portion and periphery of the contact portion, so that part of the bond substrate is separated from the lower support base with the use of an end portion of the lower support base as a fulcrum point and the bond substrate is spontaneously attached to the base substrate; heating the bond substrate; and separating the bond substrate from the base substrate, so that part of the bond substrate and the insulating layer which is formed on the entire surfaces of the bond substrate are transferred to the base substrate.