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:
Aug. 26, 2014
Filed:
Jun. 11, 2012
Applicants:
Kiyotaro Itagaki, Naka-gun, JP;
Kunihiro Yamada, Yokkaichi, JP;
Yoshihisa Iwata, Yokohama, JP;
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
A control circuit is configured to set a drain-side select transistor and a source-side select transistor connected to a selected memory string to non-conductive states. The control circuit is configured to apply a first voltage to a non-selected word line connected to a gate of a non-selected memory cell in the selected memory string. The control circuit is configured to apply a second voltage to a selected word line connected to a gate of a selected memory cell in the selected memory string. The second voltage is smaller than the first voltage in an erasing operation.