Patent ID: 7326628
Filing Date: 2008-02-05
Classification: H01L

Abstract:
1. A method for producing a semiconductor structure which comprises: conducting controlled co-implanting of at least first and second different atomic species into a face of donor substrate to create an embrittlement zone which defines a thin layer of donor material to be transferred, by selecting implantation energies so that the coimplanting is made under conditions such that the first and second species are respectively distributed in the donor wafer according to a repartition profile that presents a spreading zone in which each species is mainly distributed and at a maximum concentration peak, with the implantation doses and implantation energies of the first and second species selected such that the second species is implanted deeper in the embrittlement zone than the first species spreading zone, with the first species selected to provide essentially chemical implantation to thus form platelet defects in the donor substrate, and with the second species selected to provide physical implantation to thus act as a source of internal pressure in the donor wafer to impart stress upon the platelet defects, and wherein the implantation dose of the first species is between about 40 to 60 percent of all implantation doses; placing the face of the donor substrate into contact with a support substrate, and detaching the donor substrate at the embrittlement zone to transfer the thin layer to the support substrate while minimizing blister formation in and surface roughness of the transferred layer, wherein the offset between the first species maximum concentration peak and the second species maximum concentration peak is between about 500 and about 1000 angstrorns.