Semiconductor storage device having a user region and a...

Details Semiconductor storage device having a user region and a... Semiconductor storage device having a user region and a...

2006-12-20

2009-02-17

Yoha, Connie C (Department: 2827)

Static information storage and retrieval

Read/write circuit

Bad bit

C365S230030, C365S230060

Reexamination Certificate

active

07492650

ABSTRACT:
The present invention provides a semiconductor storage device that requires no specialized circuit or the like for reading redundancy data from a redundancy region, and that is capable of freely changing the arrangement of the redundancy region in the memory array area. A semiconductor storage device of the present invention includes a memory array configured as shown below. The memory array includes a user region which is composed of given page units and where user data is stored, and a redundancy region which is composed of the same given page units and where redundancy data is stored. The area in the memory array can be used either as the user region or as the redundancy region.

REFERENCES:
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patent: 6131139 (2000-10-01), Kikuchi et al.
patent: 6414885 (2002-07-01), Nagamatsu et al.
patent: 6438044 (2002-08-01), Fukuda
patent: 6442083 (2002-08-01), Hotaka
patent: 1 416 389 (2004-05-01), None
patent: 8-235028 (1996-09-01), None
patent: WO 86/04727 (1986-08-01), None

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