Patent ID: 7226509
Filing Date: 2007-06-05
Classification: C30B,H01L,Y10S

Abstract:
1. A method of fabricating a substrate comprising: providing a crystalline base substrate that includes a front face and a zone of weakness which cooperatively define a carrier sublayer therebetween, wherein the zone of weakness defines a remainder of the base substrate on an opposite side of the zone of weakness from the carrier sublayer; growing a stiffening layer on the front face of the base substrate to form a carrier substrate for subsequent processing; detaching the stiffening layer and carrier sublayer from the remainder of the base substrate at the zone of weakness to obtain a carrier substrate that is suitable for use in growing high quality homo-epitaxial or hetero-epitaxial films thereon; and growing a high quality homo-epitaxial film or hetero-epitaxial film on the stiffening layer of the carrier substrate.