Patent ID: 8505197
Filing Date: 2013-08-13
Classification: H01L,Y10T

Abstract:
1. A method of fabricating a multilayer substrate, the method comprising: bonding a front face of a donor substrate to a front face of a receiver substrate by molecular adhesion to form a stack; applying a heat treatment to the stack to consolidate a bond interface between the donor substrate and the receiver substrate; thinning a back face of the donor substrate to form an active layer; trimming a periphery of the donor substrate and at least a portion of a periphery of the receiver substrate; and etching the back face of the donor substrate, the periphery of the donor substrate, and the at least a portion of the periphery of the receiver substrate subsequent to thinning the back face of the donor substrate and trimming the periphery of the donor substrate and the at least a portion of the periphery of the receiver substrate; wherein a surface of the active layer is not exposed prior to etching the back face of the donor substrate during the thinning of the back face of the donor substrate and the trimming of the periphery of the donor substrate.