Patent ID: 7737502

Claim:
A strained Si/SGOI structure comprising: an active device region comprising a relaxed SiGe layer present on a buried insulating layer, in which the buried insulating layer is continuously extending across an entire width of a semiconductor substrate, a strained Si layer is located atop the relaxed SiGe layer, wherein the sidewalls of the relaxed SiGe layer are recessed to provide a void at each sidewall of the relaxed SiGe layer that is not filled with any material, a raised source/drain region located atop a portion of said strained Si layer, and a stack comprising at least a gate dielectric and a gate polySi located on another portion of the strained Si layer; and a raised trench oxide region surrounding said active device region, wherein an upper surface of the raised trench oxide region is raised above an upper surface of the raised source/drain region.