Patent ID: 6987289
Filing Date: 2006-01-17
Classification: H01L

Abstract:
1. A method of manufacturing a fin-type field effect transistor (FinFET), said method comprising: patterning a rectangular sacrificial mandrel on a hard-mask overlying a semiconductor layer; forming sidewalls along the vertical surfaces of said mandrel; removing said mandrel; etching portions of said hard-mask not protected by said sidewalls; removing said sidewalls; etching portions of said semiconductor layer not protected by said hard-mask sidewalls to leave a freestanding rectangular loop of semiconductor material having two longer fins and two shorter sections, wherein said longer fins are perpendicular to said shorter sections; patterning a rectangular gate conductor over central sections of said two longer fins, wherein said gate conductor intersects to said two longer fins; doping portions of said semiconductor material not covered by said gate conductor to form source and drain regions in portions of said fins that extend beyond said gate; forming insulating sidewalls along said gate conductor comprising a gate structure; covering said gate conductor and said semiconductor material with a conductive contact material; forming a contact mask over a portion of said conductive contact material that is above source and drain regions of a first fin of said two longer fins; and selectively etching regions of said conductive contact material and said semiconductor material not protected by said contact mask, wherein said selective etching process leaves said conductive contact material on source and drain regions of said first fin, and wherein said selective etching process removes source and drain regions of a second fin of said two longer fins.