Patent ID: 8624357
Filing Date: 2014-01-07
Classification: H01L

Abstract:
1. A semiconductor device fabrication method, comprising: providing a first substrate including a first semiconductor material, wherein the first substrate has a first Young's modulus value; forming a porous layer within the first substrate, wherein the porous layer has a second Young's modulus value in the range of 35 percent to 65 percent of the first Young's modulus value; forming a first bonding layer adjacent to the porous layer of the first substrate; providing a second substrate including a second semiconductor material, wherein the second semiconductor material is different from the first semiconductor material; forming a second bonding layer adjacent to a surface of the second substrate; implanting hydrogen ions in the second substrate; bonding the first bonding layer of the first substrate with the second bonding layer of the second substrate to form a set of bonded substrates; and based on the implanted hydrogen ions, exfoliating a layer of the second semiconductor material adjacent to the second bonding layer, wherein the exfoliated layer of the second semiconductor material is separated from a remainder of the second substrate so as to form a composite substrate including the exfoliated layer of the second semiconductor material, wherein the set of bonded substrates is a first set of bonded substrates, and further comprising: forming a device layer adjacent to the exfoliated layer of the second semiconductor material; bonding the device layer with a device substrate to form a second set of bonded substrates; and separating the second set of bonded substrates along an interface within the porous layer to form a semiconductor device, wherein the semiconductor device includes the device substrate and the device layer bonded to the device substrate.