Patent ID: 8216917

Claim:
A method for fabricating a semiconductor on insulator type substrate, which comprises: forming an epitaxial layer of semiconducting material on a face of donor substrate that contains oxygen precipitates having a density of less than 10 10 /cm 3 or a mean size of less than 500 nm, forming an oxide layer on either the donor substrate or a receiver substrate, implanting atomic species in the donor substrate to form a weakened zone in the epitaxial layer, bonding the donor and receiver substrates together to provide the oxide layer present at the bonding interface between the substrates, fracturing the donor substrate in the weakened zone to transfer a layer of the donor substrate to the receiver substrate with the transferred layer including at least part of the epitaxial layer, and recycling the remainder of the donor substrate as a receiver substrate for fabrication of a second semiconductor on insulator type substrate.