Patent ID: 8349665

Claim:
A method of operating a fuse device including a fuse unit which includes a cathode, an anode, and a fuse link connecting the cathode and the anode, and a transistor including at least a first portion of the fuse unit, the method comprising: applying a programming current to the fuse unit; measuring a drain current of the transistor, wherein the fuse link is a gate of the transistor, the transistor further includes a source and a drain on a substrate at an each side of the fuse link, and at least one of the source and the drain has a fuse structure including, two regions located apart from each other, and a link region which has a width less than each of the two regions and the link region is located between the two regions; and applying another programming current to at least one of the source and the drain having the fuse structure, prior to the measuring of the drain current.