Patent ID: 8633707

Claim:
A fuse structure, comprising: a first dielectric layer having a first conductive via and a first conductive line disposed in a first cavity formed in said first dielectric layer, said first conductive via and said first conductive line having a first liner disposed along at least vertical surfaces of said first cavity, said first conductive via being in electrical contact with and extending vertically from a bottom of said first conductive line; a second dielectric layer above said first dielectric layer, said second dielectric layer having a second conductive via and a second conductive line disposed in a second cavity formed in said second dielectric layer, said second conductive via and said second conductive line having a second liner disposed along at least vertical surfaces of said second cavity, said second conductive via being in electrical contact with and extending from a bottom of said second conductive line, said second conductive via being in electrical contact with said first conductive line; wherein at least a portion of said first liner has a thickness less than said second liner, and wherein said second conductive line laterally extends around said second conductive via such that said second conductive line is wider in all directions than at least a diameter of an upper portion of said first conductive via.