Patent ID: 7544265

Claim:
A method of fabricating a release substrate of semiconductor materials, which comprises forming a reversible connection between two substrate release layers by providing a connecting layer of a first material, and providing a concentrated zone of nanoparticles of a second material in the connecting layer as a first substrate release layer to facilitate release of the substrate release layers, with the connecting layer having a bonding energy that is substantially constant even when the release substrate is exposed to heat treatment, wherein the connecting layer is formed by: providing a first elemental layer of the first material adjacent the first substrate release layer; forming an enriched layer by providing a second elemental layer of the second material or a precursor for the second material on the surface of the first elemental layer; further providing a third elemental layer of the first material on the surface of the enriched layer; and heat treating the enriched layer to cause segregation of nanoparticles of the second material thus forming a second release layer.