Patent ID: 6893936

Claim:
A method for forming a strained Si 1-y Ge y layer above an insulator layer, the method comprising the steps of: forming a relaxed Si 1-x Ge x layer on a first crystalline semiconductor substrate; forming a strained Si 1-y Ge y layer on said relaxed Si 1-x Ge x layer; forming a Si 1-z Ge z layer on said strained Si 1-y Ge y layer; forming a hydrogen-rich defective layer in said relaxed Si 1-x Ge x layer; providing a second crystalline semiconductor substrate having an insulator layer thereover; bonding a top surface of said Si 1-z Ge z layer on said first substrate to said insulator layer on said second substrate; separating said relaxed Si 1-x Ge x layer at said hydrogen-rich defective layer to form a structure comprising said second substrate with said insulator layer, said Si 1-z Ge z layer on said insulator layer, said strained Si 1-y Ge y layer on said Si 1-z Ge z layer, and a portion of said relaxed Si 1-x Ge x layer on said strained Si 1-y Ge y layer; and removing said portion of said relaxed Si 1-x Ge x layer.