Patent ID: 8652932

Claim:
A method of fabricating a semiconductor device comprising: forming an epitaxial semiconductor material on sidewalls of at least one fin structure that is present on a substrate surface, wherein the at least one fin structure has a first composition that is different from a second composition of the epitaxial semiconductor material; forming a replacement gate structure on a channel portion of the at least one fin structure; forming an interlevel dielectric layer over an exposed portion of the at least one fin structure, wherein the interlevel dielectric layer has an upper surface that is coplanar with an upper surface of the replacement gate structure; removing the replacement gate structure with an etch that is selective to at least the at least one fin structure, the epitaxial semiconductor material and the interlevel dielectric layer, wherein removing the replacement gate structure provides a first opening to the at least one fin structure; removing an exposed portion of the epitaxial semiconductor material with an anisotropic etch to provide a second opening that terminates on the substrate surface; and forming a functional gate structure filling at least a portion of the first opening and the second opening.