Patent ID: 7314790

Claim:
A method for forming a silicon-containing semiconductor material comprising the steps of: providing a silicon-containing <110> layer; and creating a biaxial compressive strain in said silicon-containing <110> layer, wherein said creating a biaxial compressive strain comprises forming at least one porous Si layer having an uppermost surface in said <110> Si-containing layer; annealing the uppermost surface to create a non-porous surface layer; forming a crystalline epitaxial Si-containing layer having a <110> orientation on the non-porous surface layer thereby forming a transfer structure; bonding the transfer structure to a material that has a higher coefficient of thermal expansion than Si at a temperature that is elevated above the ultimate device operating temperature to provide a bonded structure; cooling the bonded structure so that a mechanically weak interface forms at said at least one porous Si layer thereby cleaving said bonded structure at said interface; and removing remaining portions of the least one porous Si layer from the cleaved structure.