Patent ID: 7407867
Filing Date: 2008-08-05
Classification: H01L,Y10S

Abstract:
1. A method for producing a semiconductor structure that includes at least one useful layer on a substrate comprising: providing a source substrate with a zone of weakness therein that defines a useful layer between the zone of weakness and a front face of the source substrate; bonding the front face of the source substrate to a support substrate and detaching the useful layer from the source substrate at the zone of weakness to transfer the useful layer to the support substrate, wherein the transferred useful layer has a free face provided by the detachment at the zone of weakness; implanting atomic species into the free face of the useful layer to a controlled mean implantation depth therein to form a zone of weakness within the useful layer that defines front and rear useful layers, with the rear useful layer contacting the support substrate and the front useful layer containing a greater concentration of defects; bonding a stiffening substrate to the free face of the front useful layer after implantation of the atomic species; and detaching the front useful layer from the rear useful layer along the zone of weakness to form a semiconductor structure comprising the support substrate and the rear useful layer thereon.