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:
Jul. 05, 2016
Filed:
Jul. 15, 2014
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventors:
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01); G11C 29/00 (2006.01); H01L 21/66 (2006.01);
U.S. Cl.
CPC ...
G11C 29/808 (2013.01); G11C 29/846 (2013.01); G11C 29/848 (2013.01); H01L 22/20 (2013.01); H01L 2924/0002 (2013.01);
Abstract
A semiconductor memory includes a memory cell array that includes data cells of x bits and redundant cells of y bits for each word; a position-data storage unit that stores, for each word, defective-cell position data of defective cells of the data cells and the redundant cells; and a read circuit that reads data from cells of x bits based on the defective-cell position data stored in the position-data storage unit for a specified word of which address is specified as read address, the cells of x bits being formed by the data cells of x bits and the redundant cells of y bits of the specified word other than the defective cells.