Patent ID: 8921209

Claim:
A method of forming a strained semiconductor material comprising: epitaxially growing a cleave layer comprising a germanium containing material on a topmost surface of a first base semiconductor layer; forming a silicon layer on a topmost surface of the cleave layer, wherein the first base semiconductor layer, the cleave layer and the silicon layer form a host semiconductor substrate; contacting a strain inducing material layer selected from a metal or polymer to the silicon layer of the host semiconductor substrate, wherein the strain inducing material layer induces a strain in the silicon layer of the host semiconductor substrate; contacting a first handle substrate to an exposed surface of the strain inducing material layer; separating an entirety of the silicon layer of the host semiconductor substrate from the host semiconductor substrate along the topmost surface of the cleave layer, wherein said separating comprises a spalling process in which the first handle substrate is pulled in a direction away from the host semiconductor substrate to expose a surface of the silicon layer previously forming an interface with said cleaving layer; bonding a second handle substrate to the surface of the silicon layer previously forming an interface with said cleaving layer, wherein the bonding of the second handle substrate to the silicon layer retains the strain in the silicon layer that was induced by the strain inducing material layer; and removing the first handle substrate and the strain inducing material layer, wherein the silicon layer of the host semiconductor substrate provides a strained semiconductor layer that is bonded to the second handle substrate at said surface that previously formed an interface with said cleaving layer.