Nonvolatile semiconductor memory device having redundant...

Details Nonvolatile semiconductor memory device having redundant... Nonvolatile semiconductor memory device having redundant...

2007-09-18

2007-09-18

Nguyen, Tuan T. (Department: 2824)

Static information storage and retrieval

Read/write circuit

Bad bit

C365S189070, C365S185090

Reexamination Certificate

active

11440733

ABSTRACT:
A nonvolatile semiconductor memory device including associating means for associating a faulty block with a redundant block, a block switching circuit for selecting the associated redundant block when a memory block is associated with the redundant block, an error detection circuit for detecting an error in an accessing operation to the memory block, a faulty block identification circuit for identifying the memory block having the detected error as a faulty block when the error is detected and associating the faulty block with the redundant block in the case where the redundant block which is not associated with the faulty block exists.

REFERENCES:
patent: 6298007 (2001-10-01), Santurkar et al.
patent: 7219271 (2007-05-01), Kleveland et al.
patent: 3-116497 (1991-05-01), None

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