Patent ID: 7592671

Claim:
A semiconductor structure comprising: a doped Si-containing crystalline semiconductor substrate; a relaxed SiGe alloy layer on the substrate, said relaxed SiGe alloy layer including a Ge content up to 99 atomic percent, a measured degree of relaxation of about 10% or greater, a surface region that is metastable and has a defect density of about 1E5 defects/cm 3 or greater; a high-quality buried oxide layer on the relaxed SiGe alloy layer, said high-quality buried oxide having a leakage current of about 1 microAmp or less and a breakdown field of about 2 Megavolts or greater; a strained Si-containing semiconductor layer having a dopant concentration of about 1E15 atoms/cm 3 or greater on the high-quality buried oxide layer, wherein the relaxed SiGe alloy layer and the strained Si-containing semiconductor layer have an identical crystallographic orientation selected from (100), (110) or (111)and both said strained Si-containing semiconductor layer and said high-quality buried oxide layer are patterned; and at least one complementary metal oxide semiconductor device located on a surface of said strained Si-containing semiconductor layer.