Patent ID: 7786549

Claim:
An antifuse structure comprising: a first metal segment having a first end and being adapted to be softened upon exposure to pulsed laser energy; a second metal segment having a second end and being adapted to be softened upon exposure to pulsed laser energy; the first and second ends defining a fuse gap between them, wherein the fuse gap is filled with a dielectric material that also surrounds the fuse gap, and that is selected from the group consisting of polyimide and porous silicate; and at least one of the first and second ends having at least one corner along the end facing the fuse gap; wherein the first and second metal segments are structured and arranged to soften upon exposure to pulsed laser energy and are structured and arranged to move into physical contact with one another through the dielectric material to form an electrical connection upon application of a voltage potential between the metal segments, the corner enhancing the electric field due to the potential gradient around the corner.