Patent ID: 7575988

Claim:
A method for forming a hybrid substrate by direct bonding of donor and receiver substrates suitable for use in electronics, optics, or optoelectronics, each substrate comprising a respective front face and surface, with the front face of the receiver substrate comprising a semiconductor material at, or in proximity to, the surface, and the donor substrate including a zone of weakness that defines a layer to be transferred from a remainder of the donor substrate, wherein the method comprises: preparing the substrate surfaces by exposing at least the surface of the receiver substrate to a temperature from about 900° C. to about 1200° C. in an inert atmosphere for a duration of at least 30 sec; directly bonding together the front faces of the prepared substrates to form a composite substrate; heat treating the composite substrate to increase bonding strength between the front surfaces of the donor and receiver substrates; and transferring the layer from the donor substrate by detaching the remainder of the donor substrate at the zone of weakness to form the hybrid substrate.