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. 12, 2016
Filed:
Dec. 11, 2012
Panasonic Corporation, Osaka, JP;
Shunsaku Muraoka, Osaka, JP;
Satoru Mitani, Osaka, JP;
Takeshi Takagi, Kyoto, JP;
Koji Katayama, Nara, JP;
Abstract
A method of driving a variable resistance element comprises: before a first write step is performed, applying an initial voltage pulse of a first polarity to change a resistance value of a metal oxide layer from a resistance value corresponding to an initial state of the metal oxide layer to another resistance value; wherein when the resistance value corresponding to the initial state is R, the resistance value corresponding to a write state is RL, the resistance value corresponding to an erase state is RH, another resistance value is R, a maximum value of the current flowing when the initial voltage pulse is applied is IbRL, a maximum value of the current flowing when the write voltage pulse is applied is IRL, and a maximum value of the current flowing when the erase voltage pulse is applied is IRH, R>RH>R≧RL, and |IRL|>|IbRL| are satisfied.