Patent ID: 9406748
Filing Date: 2016-08-02
CPC Classification: B82Y,H01L

Claim Text:
1. A method of forming a semiconductor structure, said method comprising: providing at least one fin stack structure on an insulator layer, said at least one fin stack structure comprising, from bottom to top, a first semiconductor fin portion, a dielectric fin portion, a second semiconductor fin portion and a hard mask fin portion; forming at least one sacrificial gate structure on a portion of said at least one fin stack structure; removing said hard mask fin portion and said dielectric fin portion that are not located beneath said at least one sacrificial gate structure; forming an epitaxial semiconductor material structure from exposed surfaces of said first semiconductor fin portion and said second semiconductor fin portion not covered by said at least one sacrificial gate structure; removing said at least one sacrificial gate structure; removing remaining portions of said hard mask fin portion and remaining portions of said dielectric fin portion that were previously located beneath said at least one sacrificial gate structure; and recessing said insulating layer, wherein after said recessing said insulator layer, said first semiconductor fin portion and said second semiconductor fin portion are suspended and are stacked one atop the other.