A method of producing a substrate by transferring a donor wafer comprising foreign species, and an associated donor wafer

摘要

The invention provides a method of producing a substrate comprising a thin crystalline layer transferred from a donor wafer onto a support, said thin layer including one or more foreign species intended to modify its properties, the method being characterized in that it comprises the following steps in sequence: implanting atomic species into a zone of the donor wafer (20) that is substantially free of foreign species (24), to form an embrittlement zone (22) below a bonding face, the embrittlement zone and the bonding face delimiting a thin layer (23) to be transferred; bonding the donor wafer (20), at the level of its bonding face, to a support (10); applying stresses in order to produce a cleavage in the region of the embrittlement zone (22) to obtain a substrate comprising the support (10) and the thin layer (23); and in that it further comprises a step of diffusing foreign species (24) into the thickness of the thin layer (23) prior to implantation or after fracture, suited to modify the properties of the thin layer, in particular its electrical or optical properties. <??>Application to producing substrates with a thin InP layer rendered semi-insulating by iron diffusion. <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE>