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. 15, 1998
Filed:
Feb. 19, 1997
Applicant:
Inventor:
Kenshiro Arase, Kanagawa, JP;
Assignee:
Sony Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365200 ; 36523001 ;
Abstract
A semiconductor memory wherein memory cells are arranged in a matrix and word lines or bit lines have hierarchical structures, where the efficiency of redundancy is increased by replacing a defective memory cell existing in a column or row by a sub word line unit or a sub bit line unit.