Patent ID: 9716029
Date: 2017-07-25
CPC Classifications: H01L

Claim:
1. A method for transferring a layer of semiconductor material, which comprises: providing a donor substrate comprising a useful layer of a semiconductor material, a confinement structure comprising a confinement layer of a semiconductor material that has a chemical composition that is different from that of the useful layer, two separation layers of semiconductor material having a chemical composition distinct from a composition of the confinement layer, a first separation layer of the two separation layers arranged on and in contact with a first side of the confinement layer and a second separation layer of the two separation layers arranged on and in contact with a second side of the confinement layer, and two protective layers of semiconductor material having the same chemical composition as one another and a chemical composition that is distinct from that of the confinement layer, with a first protective layer of the two protective layers being arranged on and in contact with the first separation layer, and a second protective layer of the two protective layers being arranged on and in contact with the second separation layer; providing a receiver substrate; introducing ions into the donor substrate; bonding together the donor and receiver substrates; subjecting the donor and receiver substrates to a heat treatment that includes an increase in temperature, during which heat treatment the confinement layer is heated sufficiently and attracting and concentrating the ions in the confinement layer; and detaching the donor substrate from the receiver substrate by breaking at the confinement layer, and transferring at least part of the useful layer to the receiver substrate, with the two protective layers confining in the confinement structure defects that would otherwise appear following breaking at the confinement layer, the two separation layers preventing detachment inside the two protective layers.