Patent ID: 8101466

Claim:
A manufacturing method of an SOI substrate, comprising the steps of: (A) cutting a first single crystal silicon substrate to form a plurality of second single crystal silicon substrates each of which has a chip size; (B) forming an insulating layer on one surface of each of the plurality of second single crystal silicon substrates, and forming an embrittlement layer in each of the plurality of second single crystal silicon substrates; and (C) bonding a substrate having an insulating surface and the plurality of second single crystal silicon substrates with the insulating layer therebetween, and conducting heat treatment to separate the plurality of second single crystal silicon substrates along the embrittlement layer, and forming a plurality of single crystal silicon thin films over the substrate having an insulating surface, wherein each of the plurality of second single crystal silicon substrates is bonded to the substrate having an insulating surface so as to be separated from an adjacent second single crystal silicon substrate with a gap.