Patent ID: 8889495

Claim:
A method of forming a semiconductor structure comprising: forming a trench in a single crystalline semiconductor material layer comprising a first semiconductor material and located in a semiconductor substrate, wherein surfaces of said trench consist of single crystalline sidewall surfaces of said first semiconductor material and a single crystalline bottom surface of said first semiconductor material; epitaxially depositing a single crystalline semiconductor alloy of said first semiconductor material and a second semiconductor material different from said first semiconductor material directly on said single crystalline sidewall surfaces and said single crystalline bottom surface of said trench, said single crystalline semiconductor alloy having a single crystalline crystallographic structure that is in epitaxial alignment with a single crystalline structure of said single crystalline semiconductor material layer; and patterning said single crystalline semiconductor material layer and said single crystalline semiconductor alloy to form a first semiconductor fin comprising said first semiconductor material and a second semiconductor fin comprising said single crystalline semiconductor alloy, respectively.