Patent ID: 7485551
Filing Date: 2009-02-03
Classification: H01L,Y10S

Abstract:
1. A method for providing a semiconductor heterostructure which comprises: providing donor and receiver substrates; providing at least one insulating layer on at least one of the donor or receiver substrates; implanting atomic species in the insulating layer(s) to form a trapping layer within the insulating layer, with the atomic species being identical to or isoelectric with one of the species constituting the insulating layer so that the trapping layer is capable of sufficiently retaining gas in the interface to reduce or limit formation of defects in or on the active layer; bonding the donor substrate and the receiver substrate by molecular bonding of their respective top surfaces to interpose the insulating layer(s) between the donor and receiver substrates and form a connection interface between such surfaces; and removing a portion of the donor substrate to provide the heterostructure and expose an active layer, wherein the heterostructure comprises the receiver substrate, the insulating layer(s) and the active layer; forming a zone of weakness in the donor substrate prior to bonding, with the zone of weakness defining the active layer from the portion of the donor substrate to be removed, wherein the zone of weakness is formed by the implantation of atomic species that are different from those used to form the trapping layer.