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:
Aug. 14, 2007
Filed:
Oct. 22, 2003
Applicants:
Takeshi Kijima, Matsumoto, JP;
Yasuaki Hamada, Suwa, JP;
Eiji Natori, Chino, JP;
Koji Ohashi, Chino, JP;
Inventors:
Takeshi Kijima, Matsumoto, JP;
Yasuaki Hamada, Suwa, JP;
Eiji Natori, Chino, JP;
Koji Ohashi, Chino, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A ferroelectric film is formed by an oxide that is described by a general formula ABNbO. An A element includes at least Pb, and a B element includes at least one of Zr, Ti, V, W, Hf and Ta. The ferroelectric film includes Nb within the range of: 0.05≦x<1. The ferroelectric film can be used for any of ferroelectric memories of 1T1C, 2T2C and simple matrix types.