The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2002
Filed:
Oct. 23, 2001
Applicant:
Inventor:
Atsushi Fujiwara, Osaka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 ; G11C 8/00 ;
U.S. Cl.
CPC ...
G11C 7/00 ; G11C 8/00 ;
Abstract
The semiconductor memory device, provided with a secondary regular memory region for storing a rewrite program and the like in addition to a primary regular memory region for storing data, includes a spare block decoder for enabling selection of a spare memory block and a register section for holding a signal that activates the spare block decoder. Whether the spare memory block is used as the secondary regular memory region or as a spare memory block for redundancy defect replacement is controlled with the signal held in the register section. In this way, the secondary regular memory region is provided without increasing the area.