Patent ID: 9576964
Date: 2017-02-21
CPC Classifications: H01L

Claim:
1. A semiconductor structure comprising: a trench capacitor embedded in a stack of a semiconductor substrate and an insulator layer and comprising an inner electrode, a node dielectric, and an outer electrode; and an integrated fin and strap structure located on said insulator layer and comprising a semiconductor fin and an epitaxial semiconductor strap structure, wherein said epitaxial semiconductor strap structure is epitaxially aligned to said semiconductor fin and extends below a top surface of said insulator layer, wherein said epitaxial semiconductor strap structure includes a non-recessed pillar portion in direct physical contact with a sidewall surface of said semiconductor fin and having a first height, and a recessed pillar portion located under said non-recessed pillar portion and having a second height that is less than the first height, said epitaxial semiconductor strap structure is spaced apart from a topmost surface of said inner electrode by a polycrystalline semiconductor material portion, said polycrystalline semiconductor material portion has a non-uniform vertical thickness and a non-planar top surface and is present on an entirety of said topmost surface of said inner electrode.