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. 22, 2009
Filed:
Dec. 10, 2007
Koji Kohara, Yokohama, JP;
Koji Kohara, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor integrated circuit is disclosed, which includes a plurality of memory circuits in which defective columns are relievable, mounted on one chip, each of the memory circuits having a multi-bit structure, a plurality of comparison circuit which are connected to output sides of the respective memory circuits, and compare multi-bit memory data items output from the associated memory circuits with multi-bit expected data, a logic circuit which consolidates multi-bit comparison results output from the comparison circuits, a replacement analysis circuit which is shared between the memory circuits, performs replacement analysis by processing multi-bit data output from the logic circuit, and generates relief information to relief the memory circuits, and a nonvolatile storage circuit which stores the relief information, and performs relief for the memory circuits by using the relief information.