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:
Nov. 09, 2010
Filed:
Jan. 30, 2009
Tomohiro Kurozumi, Kyoto, JP;
Hironori Akamatsu, Osaka, JP;
Katsuji Satomi, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In a semiconductor memory device, a non-volatile element sectionstores information necessary for rescuing a main memory cell, as storage information, in a non-volatile element. When rescue information Sis newly outputted by a redundancy rescue section, a rescue determination sectiondetermines whether or not a main memory cell is to be rescued, based on storage information Sstored in the non-volatile element section, and the rescue information Swhich is newly outputted. The non-volatile element sectionrenews the storage information based on a determination result from the rescue determination section. Thus, on the assumption that power is turned off each time a voltage condition is changed, the semiconductor memory deviceis capable of determining whether or not the rescue is to be performed, based on results of testings performed under a plurality of voltage conditions.