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US 2011/0085396 A1Published application
Repair fuse device
AssigneeHynix Semiconductor Inc.
InventorsHYUNG SEOK BANG, HYUN KOO CHOI
Life of this patent
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Abstract
A repair fuse device is provided. The repair fuse device remarkably reduces the number of the enable fuse cuttings by making initial states of all repair fuse sets to a repair state, cutting an address fuse corresponding to a defective cell, and cutting an enable fuse corresponding to a defective redundancy cell.
Claims10
A repair fuse device comprising:
- a repair fuse unit including an address fuse to be cut in correspondence with a defective main cell and an enable fuse to be cut in correspondence with a defective redundancy cell, the repair fuse unit being configured to output a first selection signal corresponding to the cutting of the address fuse and a second selection signal corresponding to the cutting of the enable fuse;
- and
- a repair unit configured to repair the defective main cell and normal main cells using normal redundancy cells according to an received address, the first selection signal, the second selection signal and matching information.
Dependencies are inferred from the claim text.