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:
Sep. 01, 2009
Filed:
Apr. 23, 2007
Tsunenori Shiimoto, Kanagawa, JP;
Nobumichi Okazaki, Kanagawa, JP;
Hironobu Mori, Nagasaki, JP;
Tomohito Tsushima, Tokyo, JP;
Tsunenori Shiimoto, Kanagawa, JP;
Nobumichi Okazaki, Kanagawa, JP;
Hironobu Mori, Nagasaki, JP;
Tomohito Tsushima, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A method of driving a storage device including a variable resistance element in which resistance value is changed reversibly between a high resistance state and a low resistance state by applying voltages with different polarities between two electrodes is provided. The storage device includes a plurality of memory cells formed of the variable resistance elements. The method includes the step of applying voltages more than once in combination to the memory cell when the variable resistance element is changed from the low resistance state to the high resistance state.