Trench liner fuse

A fuse structure comprising:

• a first metal line and a second metal line;
• a first metal pillar extending vertically from a top surface of the first metal line and a second metal pillar extending vertically from a top surface of the second metal line;
• a conductive link electrically connecting a top surface of the first metal pillar to a top surface of the second metal pillar,
• wherein both the first metal line and the second metal line are a different metal than both the first metal pillar and the second metal pillar,
• wherein both the first metal pillar and the second metal pillar are a different metal than the conductive link, and
• wherein the conductive link directly contacts a sidewall of the first metal pillar and a sidewall of the second metal pillar.

A fuse structure comprising:

• a first metal via and a second metal via;
• a first metal pillar extending vertically from a top surface of the first metal via and a second metal pillar extending vertically from a top surface of the second metal via, wherein both the first metal via and the second metal via are a different metal than both the first metal pillar and the second metal pillar;
• and
• a conductive link electrically connecting the first metal pillar to the second metal pillar, wherein both the first metal pillar and the second metal pillar are a different metal than the conductive link, and
• wherein the conductive link comprises a first cross-sectional dimension and a second cross-sectional dimension, wherein the first cross-sectional dimension is smaller than the second cross-sectional dimension, and wherein the first cross-sectional dimension is approximately located at a mid-point between the first metal pillar and the second metal pillar.