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. 25, 2002
Filed:
Sep. 22, 2000
Applicant:
Inventor:
Teruhiko Amano, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 2/900 ;
U.S. Cl.
CPC ...
G11C 2/900 ;
Abstract
A row including a defective memory cell is replaced by a row of redundant memory cell, independently in each of a pair of memory blocks on opposing sides of a pair of row decoders . A redundancy determining circuit for performing the replacement is provided for each memory block, and in the redundancy determining circuit , a plurality of fuse boxes are arranged. Accordingly, as the fuses are laid-out in efficient manner, a semiconductor memory device is provided in which the circuits can be effectively arranged on the chip.