Patent ID: 6972461
Filing Date: 2005-12-06
Classification: H01L,Y10S

Abstract:
1. A method of forming a field effect transistor comprising the steps of: providing a semiconductor wafer of a silicon having a device layer with a device layer lattice constant; forming an epitaxial layer of a second semiconductor material on said device layer of said semiconductor wafer, said second material having a second lattice constant greater than said device lattice constant in a direction perpendicular to said wafer and said device layer lattice constant in a channel direction parallel to said wafer; patterning said epitaxial layer of said second material to form at least one vertical side in said channel direction; growing an epitaxial semiconductor channel layer of silicon on said vertical side, said channel layer having said second lattice constant perpendicular to said wafer and said device lattice constant along said channel direction, whereby said channel layer has tensile strain perpendicular to said channel direction and to said wafer; forming a gate insulator in a body area of at least one vertical side of said channel; forming a gate electrode abutting said gate insulator; and forming source and drain electrodes in contact with opposite ends of said body area.