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:
Apr. 15, 2014
Filed:
Sep. 15, 2011
Applicants:
Takashi Yamauchi, Kanagawa, JP;
Shosuke Fujii, Kanagawa, JP;
Reika Ichihara, Kanagawa, JP;
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 23/52 (2006.01); H01L 29/00 (2006.01); H01L 47/00 (2006.01); H01L 29/02 (2006.01); H01L 29/04 (2006.01); H01L 29/06 (2006.01); G11C 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
According to one embodiment, a nonvolatile variable resistance device includes a first electrode, a second electrode, a first layer, and a second layer. The second electrode includes a metal element. The first layer is arranged between the first electrode and the second electrode and includes a semiconductor element. The second layer is inserted between the second electrode and the first layer and includes the semiconductor element. The percentage of the semiconductor element being unterminated is higher in the second layer than in the first layer.