Patent ID: 7803694
Filing Date: 2010-09-28
Classification: H01L,Y10S

Abstract:
1. A method of preparing a semiconductor wafer having a strained layer which comprises: growing a strained layer in a strained state to a desired thickness on a matching layer on a donor substrate, wherein the matching layer has a matching lattice parameter that is sufficiently different than the lattice parameter of the strained layer so that the strained layer remains in the strained state; growing a strain retention layer of strained SiC on the strained layer to retain the strained layer in a strained state during transfer of the strained layer to form the semiconductor wafer; providing a weakened region in the matching layer; bonding the strain retention layer to an insulating or semi-insulating layer; and transferring a part of the matching layer, the strain retention layer and the strained layer to the insulating or semi-insulating layer thus forming a semiconducting layer having strained layers thereon.