Patent ID: 8871109

Claim:
A method for treating a surface of a silicon donor body, the method comprising the steps of: introducing a metal layer to at least a portion of a donor wafer; thermally cleaving a first lamina from the donor wafer to create an exfoliated surface of the donor wafer, wherein the first lamina has a first surface and second surface opposite the first surface, and wherein a thickness of the lamina between the first and the second surface is between two and 10 microns and wherein the exfoliated surface of the donor body has silicon asperities having relief of at least the thickness of the lamina; mechanically grinding the surface to remove or reduce the asperities; before the grinding step, etching to remove at least a portion of the metal layer; after the grinding step, growing an oxide at the surface; etching to remove the oxide; and after the etching to remove the oxide step, implanting ions through the surface to define a cleave plane within the donor body, wherein between the step of thermally cleaving a first lamina and the step of implanting ions, between two and ten microns of thickness of silicon is removed from the donor body, including the relief of the asperities, and wherein, between the step of thermally cleaving a first lamina and the step of implanting ions, no chemical-mechanical polishing step is performed at the surface.