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:
Sep. 08, 1998
Filed:
Feb. 08, 1996
Applicant:
Inventors:
Chikahiro Nakai, Yokohama, JP;
Hiroyuki Koinuma, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365200 ; 3652257 ; 36523003 ;
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.