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. 02, 2010
Filed:
Mar. 13, 2008
Applicants:
Atsushi Masumizu, Tokyo, JP;
Sadayuki Okuma, Tokyo, JP;
Inventors:
Atsushi Masumizu, Tokyo, JP;
Sadayuki Okuma, Tokyo, JP;
Assignee:
Elpida Memory, Inc., Chuo-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 17/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a semiconductor memory device, a repair circuit includes mode fuses to select one of plural repair modes corresponding to plural kinds of defects, respectively. The semiconductor memory device can repair a defective memory cell having operational margin defect without using redundancy memory cells.