Patent ID: 7190044

Claim:
A fuse of a semiconductor device, comprising: a first insulating layer; a fuse layer on said first insulating layer, said fuse layer including a first block, a second block, a third block, a fourth block, a connecting block connecting said first and fourth blocks, said second and third blocks being between said first and fourth blocks, the connecting block being between said second and third blocks but not connected to said second and third blocks, said first, second, third, and fourth blocks being not connected to one another except said first and fourth blocks being connected by said connecting block; a second insulating layer on said fuse layer, said second insulating layer including a plurality of via plugs; and a top metal layer on said second insulating layer and connected to said plurality of via plugs, said top metal layer including a heat buffer block, said heat buffer block being coupled to said second and third blocks but not being coupled to said first and fourth blocks.