Patent ID: 7067430

Claim:
A method of forming a silicon-germanium layer on an insulator, comprising: preparing a silicon substrate; depositing a layer of silicon-germanium on the silicon substrate to form a silicon/silicon-germanium portion having a SiGe/silicon interface; implanting hydrogen ions into the silicon substrate between about 200 Å to 1 μm below the silicon-germanium/silicon interface; preparing an insulator substrate; bonding the silicon/silicon-germanium portion to the insulator substrate with the silicon-germanium layer in contact with the insulator substrate to form a couplet; thermally annealing the couplet in a first thermal annealing step to split the couplet into a silicon portion and a silicon-germanium-on-insulator portion; patterning and etching the silicon-germanium-on-insulator portion to remove portions of the silicon and SiGe layers; etching the silicon-germanium-on-insulator portion to remove the remaining silicon layer; thermally annealing the silicon-germanium-on-insulator portion in a second annealing step to form a relaxed SiGe layer; and depositing a layer of strained silicon about the SiGe layer.