Patent ID: 9741657
Date: 2017-08-22
CPC Classifications: H01L

Claim:
1. A through-silicon-via (TSV) structure formed within a trench located within a semiconductor structure, the TSV structure comprising: a first electrically conductive liner layer located within the trench and extending along a vertical length of a side wall of the trench, the first electrically conductive liner layer including substantially u-shaped structure such that a bottom surface of the substantially u-shaped structure is co-planar with a bottom surface of the semiconductor structure and exposed through the bottom surface of the semiconductor structure; a first electrically conductive structure located on the first electrically conductive liner layer, the first electrically conductive structure partially filling the trench; a second electrically conductive liner layer located on the first electrically conductive structure; a dielectric layer located on the second electrically conductive liner layer; a third electrically conductive liner layer located on the dielectric layer; and a second electrically conductive structure located on the third electrically conductive liner layer and filling a remaining opening of the trench.