Patent ID: 8138035

Claim:
A method of fabricating an integrated circuit, comprising: providing a hybrid orientation substrate including an upper layer having a top surface with a first crystal orientation directly bonded over a lower substrate having a top surface with a second crystal orientation; regrowing a region of the upper layer using the crystalline structure of the lower substrate as a template, thereby giving the recrystallized region a top surface with the second crystal orientation; patterning the regrown region of the upper layer to form a first fin having a top surface with the second crystal orientation and a sidewall surface with the first crystal orientation; and patterning another region of the upper layer to form a second fin having a top surface with the first crystal orientation and a sidewall surface with the second crystal orientation; wherein the first fin sidewall surface defines a channel with a first carrier flow direction for a first FinFET, the second fin sidewall defines a channel with a second carrier flow direction for a second FinFET, and the second carrier flow direction is parallel or perpendicular to the first carrier flow direction.