Patent ID: 9443982
Filing Date: 2016-09-13
CPC Classification: H01L

Claim Text:
1. A semiconductor structure comprising: an epitaxial semiconductor channel material structure extending from a topmost surface of a bottom source/drain region, said epitaxial semiconductor channel material structure having a bottom portion of a first thickness and an upper portion of a second thickness that is less than the first thickness; a first functional gate structure located on one side of the epitaxial semiconductor channel material structure; a second functional gate structure located on another side of the epitaxial semiconductor channel material structure; a top source/drain region extending from a sidewall of said top portion of said epitaxial semiconductor channel material structure and contacting exposed portions of a topmost surface of said lower portion of said epitaxial semiconductor channel material structure; a bottom air gap spacer located between a bottommost surface of said first and second functional gate structures and said topmost surface of said bottom source/drain region; and a top air gap spacer located between a topmost surface of said first and second functional gate structures and a surface of said top source/drain region.