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, 2011
Filed:
Aug. 08, 2006
Yasunari Hosoi, Fukuyama, JP;
Shigeo Ohnishi, Fukuyama, JP;
Yasushi Ogimoto, Hihashi-yamato, JP;
Takashi Oka, Taito-ku, JP;
Naoto Nagaosa, Shinjyuku-ku, JP;
Yoshinori Tokura, Nerima-ku, JP;
Yasunari Hosoi, Fukuyama, JP;
Shigeo Ohnishi, Fukuyama, JP;
Yasushi Ogimoto, Hihashi-yamato, JP;
Takashi Oka, Taito-ku, JP;
Naoto Nagaosa, Shinjyuku-ku, JP;
Yoshinori Tokura, Nerima-ku, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
National Science and Technology, Tokyo, JP;
Abstract
A variable resistance element comprises a variable resistor of strongly-correlated material sandwiched between two metal electrodes, and the electric resistance between the metal electrodes varies when a voltage pulse is applied between the metal electrodes. Such a switching operation as the ratio of electric resistance between low and high resistance states is high can be attained by designing the metal electrodes and variable resistor appropriately based on a definite switching operation principle. Material and composition of the first electrode and variable resistor are set such that metal insulator transition takes place on the interface of the first electrode in any one of two metal electrodes and the variable resistor by applying a voltage pulse. Two-phase coexisting phase of metal and insulator phases can be formed in the vicinity of the interface between the variable resistor and first electrode by the work function difference between the first electrode and variable resistor.