Semiconductor memory device for improving redundancy efficiency

Details Semiconductor memory device for improving redundancy efficiency Semiconductor memory device for improving redundancy efficiency

2005-08-23

2005-08-23

Phung, Anh (Department: 2824)

Static information storage and retrieval

Read/write circuit

Bad bit

C365S201000, C365S225700

Reexamination Certificate

active

06934203

ABSTRACT:
A semiconductor memory device including a plurality of normal cell blocks including a plurality of normal memory cells for storing data, a plurality of redundancy cell blocks, a plurality of redundancy memory cells for substituting for defective normal memory cells, and at least one ECC cell block including a plurality of ECC memory cells, for substituting for defective normal memory cells in response to a mode signal.

REFERENCES:
patent: 4768193 (1988-08-01), Takemae
patent: 6418068 (2002-07-01), Raynham
patent: 11-250695 (1999-09-01), None
patent: 2002-042488 (2002-02-01), None

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