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. 07, 2009
Filed:
Mar. 29, 2006
Xin-shan LI, Nagano-ken, JP;
Koji Sumi, Nagano-ken, JP;
Masami Murai, Nagano-ken, JP;
Tsutomu Nishiwaki, Nagano-ken, JP;
Xin-Shan Li, Nagano-ken, JP;
Koji Sumi, Nagano-ken, JP;
Masami Murai, Nagano-ken, JP;
Tsutomu Nishiwaki, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
Disclosed are a piezoelectric element in which crystallinity of a piezoelectric layer is improved, and which has uniform characteristics of the piezoelectric layer, a liquid-jet head using the piezoelectric element as well as a liquid-jet apparatus. The piezoelectric element includes: a lower electrode provided to one surface side of a substrate; a piezoelectric layer which is made of a piezoelectric material containing lead (Pb), zirconium (Zr) and titanium (Ti), and which is provided above the lower electrode; and an upper electrode provided above the piezoelectric layer, and in the piezoelectric element, a relative permittivity of the piezoelectric layer is 750 to 1500 and a coercive electric field of the piezoelectric layer is 10 to 40 kV/cm.