Patent ID: 7262113

Claim:
A method for recycling a SiC source substrate, which comprises: implanting at least H + ions through a front face of a source substrate of silicon carbide with a selected combination of an implantation energy E and an implantation dose D of H + ions sufficient to form an optimal weakened zone, with the optimal weakened zone defining a useful layer comprising silicon carbide and a reminder portion of the source substrate; bonding the front face of the source substrate to a contact face of a receiving substrate; detaching the useful layer from the remainder portion of the source substrate along the weakened zone, the detaching comprising applying a thermal budget, and removing an excess zone by exfoliation; wherein the optimal weakened zone produced by the selected combination of implantation energy and dose is sufficient to cause exfoliation of at least about 80% of the peripheral excess zone of silicon carbide to facilitate recycling of the remainder portion of the source substrate by minimizing or avoiding forming an excess zone of silicon carbide material at the periphery of the useful layer that was not transferred to the receiving substrate during detachment.