Patent ID: 7261777
Filing Date: 2007-08-28
Classification: C30B,H01L,Y10S

Abstract:
1. A method for fabricating an epitaxial substrate, comprising: providing one of a crystalline and a mono-crystalline base substrate; implanting atomic species into a face of the base substrate to an implantation depth to form a zone of weakness within the base substrate that defines a sub-layer; growing a stiffening layer on the face of the base substrate by using a thermal treatment in a first temperature range; detaching the stiffening layer and the sub-layer from the base substrate by using a thermal treatment in a second temperature range higher than the first temperature range, to obtain the epitaxial substrate and a remainder of the base substrate; and growing one of a homoepitaxial layer and a heteroepitaxial layer on the stiffening layer after detaching the stiffening layer and sub-layer from the base substrate.