| US 7,579,673 B2 | ||
| Semiconductor device having electrical fuse | ||
| Hiroaki Ohkubo, Kanagawa (Japan); and Yasutaka Nakashiba, Kanagawa (Japan) | ||
| Assigned to NEC Electronics Corporation, Kanagawa (Japan) | ||
| Filed on Aug. 21, 2006, as Appl. No. 11/506,860. | ||
| Claims priority of application No. 2005-243346 (JP), filed on Aug. 24, 2005. | ||
| Prior Publication US 2007/0045783 A1, Mar. 01, 2007 | ||
| Int. Cl. H01L 23/58 (2006.01) | ||
| U.S. Cl. 257—665 [257/530] | 17 Claims |
| 1. A semiconductor device comprising:
a semiconductor substrate, and an electrical fuse provided on said semiconductor substrate,
wherein said electrical fuse includes:
a first fuse link,
a second fuse link coupled to said first fuse link,
a first current inlet/outlet terminal and a second current inlet/outlet terminal respectively provided at an end and the other
end of said first fuse link,
a third current inlet/outlet terminal and a fourth current inlet/outlet terminal respectively provided at an end and the other
end of said second fuse link, and
a decision unit which is coupled to said first current inlet/outlet terminal, said second current inlet/outlet terminal, said
third current inlet/outlet terminal, and said fourth current inlet/outlet terminal,
wherein said decision unit is configured to decide whether both of said first fuse link and said second fuse link are disconnected
and output a signal indicating that said electric fuse is disconnected when both of said first fuse link and said second fuse
link are decided to be disconnected, and to decide whether one of said first fuse link and said second fuse link is connected
and output a signal indicating that said electric fuse is connected when one of said first fuse link and said second fuse
link is decided to be connected.
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