Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

2008-07-10

2009-11-03

Le, Thong Q (Department: 2827)

Static information storage and retrieval

Read/write circuit

Bad bit

C365S230030, C365S189040, C365S189140, C365S189070

Reexamination Certificate

active

07613056

ABSTRACT:
In a semiconductor memory device provided with a redundancy circuit for conducting a repair of defective memory cells, the memory cell defects which are unevenly distributed can be efficiently repaired.The semiconductor memory device has a plurality of memory blocks, and the memory block includes a plurality of segments. A redundancy memory block which substitutes for defective data of a segment is physically provided to each of the plurality of memory blocks. A block address of the redundancy memory block is logically allocated to the plurality of memory blocks in common.

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