Patent ID: 7387947

Claim:
A method for transferring a thin useful layer from a donor substrate having an ordered crystalline structure to a receiver substrate, the method including creation of a weakened zone in the donor substrate to define the thin layer to be transferred from the donor substrate, wherein the method comprises: disturbing the crystalline structure of a surface region of the donor substrate so as to create a disturbed superficial region within the thickness of the donor substrate, and thus define a disturbance interface between the disturbed superficial region and a subjacent region of the donor substrate for which the crystalline structure remains unchanged, subjecting the donor substrate to a recrystallization annealing in order to: at least partially recrystallize the disturbed region, starting from the crystalline structure of the subjacent region of the donor substrate, and create a zone of crystalline defects in the plane of the disturbance interface; and introducing one or several species into the thickness of the donor substrate to create the weakened zone, with the species being introduced with introduction parameters that are adjusted to introduce a maximum number of species at the weakened zone at a depth that corresponds to that of the zone of crystalline defects.