Patent ID: 6972247

Claim:
A method of fabricating a strained semiconductor-on-insulator (SSOI) comprising the steps of: forming a second crystalline semiconductor layer that is strained on a surface of a first crystalline semiconductor layer, said first crystalline semiconductor layer is located atop an insulating layer of a preformed silicon-on-insulator (SOI) substrate, said insulating layer is a crystalline or non-crystalline oxide or nitride that is highly resistant to Ge diffusion; subjecting the preformed SOI substrate containing the second crystalline semiconductor layer to a first annealing step at a first temperature that is sufficient to relax the strain in the second crystalline semiconductor layer; performing an amorphization ion implantation to create a buried amorphized region comprising the entirety of the first crystalline semiconductor layer and a lower portion of the second crystalline semiconductor layer; subjecting the preformed SOI substrate containing the second crystalline semiconductor layer and the buried amorphized region to a second annealing step at a second temperature sufficient to recrystallize the buried amorphized region resulting in said first crystalline semiconductor layer recrystallizing in a strained state; and selectively removing the second crystalline semiconductor layer providing a strained semiconductor-on-insulator substrate.