Patent ID: 9748359
Date: 2017-08-29
CPC Classifications: H01L

Claim:
1. A semiconductor structure comprising: at least one semiconductor fin extending upward from a surface of a substrate; a bottom source/drain structure located at the footprint, and on each side, of the at least one semiconductor fin; a bottom dielectric spacer composed of silicon, nitrogen and at least one of boron and carbon located on each bottom source/drain structure; a functional gate structure located on each side of the at least one semiconductor fin and above the bottom dielectric spacer; a top dielectric spacer located on each functional gate structure and contacting a sidewall of a portion of the at least one semiconductor fin; and a top source/drain structure extending from each sidewall of an upper portion of the at least one semiconductor fin, wherein the bottom source/drain structure comprises, from bottom to top, a first region and a second region, wherein the second region of the bottom source/drain structure is composed of a doped semiconductor material that further contains at least one of boron atoms and carbon atoms present therein.