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:
May. 26, 2009
Filed:
May. 31, 2007
Tomohiro Kurozumi, Kyoto, JP;
Yasuhiro Agata, Osaka, JP;
Osamu Ichikawa, Osaka, JP;
Shintaro Nagai, Kanagawa, JP;
Tomohiro Kurozumi, Kyoto, JP;
Yasuhiro Agata, Osaka, JP;
Osamu Ichikawa, Osaka, JP;
Shintaro Nagai, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Each of a plurality of redundant memories includes a plurality of memory cells and is operable to be relieved when a defective cell exists. This plurality of redundant memories can operate independently of each other. A relief processing portion is shared by this plurality of redundant memories. A test circuit inspects the plurality of redundant memories. When the test circuit determines that a defective cell exists, the test circuit outputs relief information to relieve the defective cell. The relief processing portion has a plurality of defect relief portions each having a relief information storage portion operable to store the relief information and performs the processing of relieving the plurality of redundant memories.