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:
Feb. 02, 2016
Filed:
Mar. 05, 2014
Applicant:
Kabushiki Kaisha Toshiba, Minato-ku, Tokyo, JP;
Inventor:
Mariko Iizuka, Yokohama, JP;
Assignee:
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 29/00 (2006.01); G11C 11/00 (2006.01); G11C 7/00 (2006.01); G11C 11/16 (2006.01);
U.S. Cl.
CPC ...
G11C 29/702 (2013.01); G11C 11/16 (2013.01);
Abstract
A semiconductor memory device includes: a bank including a normal area including normal columns, and a redundancy area including redundancy columns and to be replaced with a failure column of the normal area; sense amplifiers connected to the normal area; and a redundancy sense amplifier connected to the redundancy area. A normal replacement unit is formed of normal columns allocated to each of the sense amplifiers. A redundancy replacement unit is formed of redundancy columns allocated to the redundancy sense amplifier. The redundancy replacement unit is smaller than the normal replacement unit.