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:
Jan. 01, 2013
Filed:
Sep. 30, 2009
Shunsaku Muraoka, Osaka, JP;
Takeshi Takagi, Kyoto, JP;
Satoru Mitani, Osaka, JP;
Koji Katayama, Nara, JP;
Shunsaku Muraoka, Osaka, JP;
Takeshi Takagi, Kyoto, JP;
Satoru Mitani, Osaka, JP;
Koji Katayama, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A method of driving a variable resistance element includes: a writing step performed by applying a writing voltage pulse having a first polarity to a variable resistance layer to change a resistance state of the layer from high to low; and an erasing step performed by applying an erasing voltage pulse having a second polarity to the layer to change the state from low to high. Here, |Vw|>|Vw| where Vwrepresents a voltage value of the writing voltage pulse for first to N-th writing steps (N≧1) and Vwrepresents a voltage value of the writing voltage pulse for (N+1)-th and subsequent writing steps, and |Ve|>|Ve| where Verepresents a voltage value of the erasing voltage pulse for first to M-th erasing steps (M≧1) and Verepresents a voltage value of the erasing voltage pulse for (M+1)-th and subsequent erasing steps. The (N+1)-th writing step follows the M-th erasing step.