Cancellation of redundant elements with a cancel bank

Details Cancellation of redundant elements with a cancel bank Cancellation of redundant elements with a cancel bank

1997-08-22

1999-01-05

Le, Vu A.

Static information storage and retrieval

Read/write circuit

Having fuse element

36523002, 365200, G11C 700

Patent

active

058569502

ABSTRACT:
The cancellation of a redundant element of an integrated circuit with a cancel bank is disclosed. In one embodiment, a fuse or antifuse bank is coupled to the redundant element and permanently programmed to respond to the address of a defective primary element. If the redundant element is found to be defective, the fuse or antifuse bank is canceled, and a result the redundant element is also canceled. A cancel line of the fuse or antifuse bank, along with the cancel line of each of a plurality of other fuse or antifuse banks, is coupled to a cancel bank. The cancel bank comprises a multiplexer and a plurality of cancel antifuses less in number than the number of fuse or antifuse banks. The cancel antifuses are selectively enabled such that the fuse or antifuse bank coupled to the defective redundant element may be canceled.

REFERENCES:
patent: 4322158 (1982-03-01), Frias et al.
patent: 5264725 (1993-11-01), Mullarkey et al.
patent: 5557848 (1996-09-01), Povey
patent: 5642316 (1997-06-01), Tran et al.
patent: 5689463 (1997-11-01), Murakami et al.
patent: 5732031 (1998-03-01), Morgan

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