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:
Dec. 10, 2013
Filed:
Nov. 17, 2011
Applicants:
Kazuhiko Kajigaya, Tokyo, JP;
Yasutoshi Yamada, Tokyo, JP;
Inventors:
Kazuhiko Kajigaya, Tokyo, JP;
Yasutoshi Yamada, Tokyo, JP;
Assignee:
Elpida Memory, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01); G11C 11/34 (2006.01); G11C 16/04 (2006.01); G11C 16/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed herein is a semiconductor device comprising a memory cell, a local bit line coupled to the memory cell, a global bit line provided correspondingly to the local bit line, and a bit line control circuit coupled between the local bit line and the global bit line. The bit line control circuit includes a restoring circuit that is activated in a refresh mode to refresh data of the memory cell while being in electrical isolation from the global bit line.