Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

1996-02-08

1998-09-08

Nguyen, Tan T.

Static information storage and retrieval

Read/write circuit

Bad bit

3652257, 36523003, G11C 700

Patent

active

058055126

ABSTRACT:
A semiconductor memory device has one redundant memory cell block selection fuse circuit block for replacing a plurality of normal memory cell blocks with one or more redundant memory cell blocks. The number of the redundant memory cell block selection fuse circuit blocks is thereby reduced enough to restrain an increase in chip area. A lesser number of normal word lines than the number of normal word lines possessed by one normal memory cell block controlled by one normal decoder are set as a minimum replace unit, and a degree of replacing freedom can be improved.

REFERENCES:
patent: 5033024 (1991-07-01), O'Connell et al.
patent: 5293348 (1994-03-01), Abe
patent: 5325334 (1994-06-01), Roh et al.
patent: 5416740 (1995-05-01), Fujita et al.
patent: 5495447 (1996-02-01), Butler et al.
patent: 5519657 (1996-05-01), Arimoto
patent: 5581508 (1996-12-01), Sasaki et al.

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