Patent ID: 8389379

Claim:
A method for transferring a thin layer from a source substrate to a target substrate comprising the following steps: ionically implanting the source substrate through a face thereof to create a buried weakened layer at a particular depth relative to the face of the source substrate, a thin layer thereby being delimited between the face and the buried weakened layer; curving each of the source substrate and the target substrate by applying force with a mechanical device to create a tangential stress state difference between the face of the source substrate and a face of the target substrate; after curving each of the source substrate and the target substrate, assembling the face of the source substrate to the face of the target substrate to form an assembled structure, then removing the mechanical device to remove the force that curves each of the source substrate and the target substrate; and dissociating the thin layer from a remainder of the source substrate after removing the mechanical device, wherein the tangential stress state difference is selected to produce a predetermined stress state within the assembled structure at the moment of dissociation.