Patent ID: 9397233
Filing Date: 2016-07-19
CPC Classification: H01L

Claim Text:
1. An integrated circuit deep trench capacitor structure, comprising: a first capacitor plate formed from a doped SOI semiconductor layer that is separated from a substrate layer by a buried insulator layer; a trench oxide layer that is located in a first trench opening formed in the doped SOI semiconductor layer and adjacent to the first capacitor plate, where the first trench opening exposes the buried isolation layer; and a second capacitor plate that is located in a second trench opening formed in the trench oxide layer and buried isolation layer to expose a portion of the substrate layer, the second capacitor plate comprising a doped semiconductor layer that is located adjacent to the trench oxide layer and that is tied to the substrate layer; where the first and second capacitor plates are separated from one another by the trench oxide layer and where the second trench opening is positioned inside the first trench opening.