Patent ID: 9059207
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A fin field effect transistor (finFET) comprising: a fin structure located on a substrate, the fin structure comprising a channel portion and source and drain extension regions separated from one another by the channel portion, wherein the channel portion and the source and drain extension regions are composed of a single first semiconductor material, and the source and drain extension regions have a first width and the channel portion has a second width smaller than the first width such that sidewalls of the channel portion are offset from sidewalls of the source and drain extension regions; an epitaxially grown semiconductor layer of a second semiconductor material that is different from the first semiconductor material present on the sidewalls of the channel portion, wherein the epitaxially grown semiconductor layer has a thickness that is the first width less the second width, and the second semiconductor material has a different lattice dimension than the first semiconductor material; and a functional gate structure straddling the channel portion of the fin structure and in contact with the epitaxially grown semiconductor layer.