Patent ID: 8420500

Claim:
A method of producing a semiconductor structure by transfer of a layer from a donor substrate having a surface bonded to a surface of a receiver substrate, which comprises: providing donor and receiver substrates having surfaces for bonding, wherein the surfaces of the substrates have central and peripheral areas; creating an embrittlement zone beneath the donor substrate surface to define the layer to be transferred, treating the surface of at least one of the donor substrate and the receiver substrate to increase bonding strength between the substrates after bonding, with the treating controlled to provide a higher increase in bonding strength at the central area(s) the substrates compared to the bonding strength at the peripheral area(s) of the substrates, after treating the surface, direct wafer bonding of the donor substrate to the receiver substrate by contact of their surfaces, and detaching the layer from the donor substrate at the embrittlement zone to form a semiconductor structure comprising the transfer layer and the receiving substrate and in which the surface of the receiver substrate, except for a peripheral crown, is provided with the transfer layer, wherein the peripheral area of the substrates has a width that is at least equal to that of the crown and between 0.5 to 2.5 mm.