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:
Feb. 10, 2015
Filed:
Jul. 26, 2013
Applicant:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/22 (2006.01); G11C 16/04 (2006.01); G11C 11/412 (2006.01);
U.S. Cl.
CPC ...
G11C 11/412 (2013.01);
Abstract
According to one embodiment, a semiconductor memory device includes a memory cell and a control circuit. The memory cell is such that a ferroelectric film is provided as a gate dielectric film. When data is stored in the memory cell, the control circuit applies a first voltage to the gate dielectric film and thereafter applies a second voltage, whose amplitude is smaller than that of the first voltage and whose polarity is opposite to that of the first voltage.