Patent ID: 8993382
Filing Date: 2015-03-31
Classification: H01L

Abstract:
1. A method for forming a fin field-effect-transistor, the method comprising: forming a dummy fin structure on a semiconductor substrate; forming a dielectric layer on the semiconductor substrate, the dielectric layer surrounding the dummy fin structure; removing the dummy fin structure so that a cavity is formed within the dielectric layer, wherein the cavity exposes a portion of the semiconductor substrate thereby forming an exposed portion of the semiconductor substrate within the cavity; implanting a dopant into the exposed portion of the semiconductor substrate within the cavity thereby creating a dopant implanted exposed portion of the semiconductor substrate within the cavity, wherein the dopant is a punch-through stopper dopant; epitaxially growing a semiconductor layer within the cavity atop the dopant implanted exposed portion of the semiconductor substrate; and removing, after the semiconductor layer has been epitaxially grown, the dielectric layer to form a fin structure comprising the semiconductor layer, the fin structure atop the dopant implanted exposed portion of the semiconductor substrate.