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:
Dec. 04, 2007
Filed:
Mar. 24, 2004
Applicants:
Takeshi Kijima, Matsumoto, JP;
Hiromu Miyazawa, Toyoshina-machi, JP;
Yasuaki Hamada, Suwa, JP;
Eiji Natori, Chino, JP;
Inventors:
Takeshi Kijima, Matsumoto, JP;
Hiromu Miyazawa, Toyoshina-machi, JP;
Yasuaki Hamada, Suwa, JP;
Eiji Natori, 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 wherein 5 to 40 mol % in total of at least one of Nb, V, and W is included in the B site of a Pb(Zr,Ti)Oferroelectric which includes at least four-fold coordinated Sior Gein the A site ion of a ferroelectric perovskite material in an amount of 1% or more. This enables to significantly improve reliability of the ferroelectric film.