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. 26, 2005
Filed:
Jul. 08, 2003
LI Xin-shan, Nagano-ken, JP;
Tsutomu Nishiwaki, Nagano-ken, JP;
Li Xin-Shan, Nagano-ken, JP;
Tsutomu Nishiwaki, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A piezoelectric liquid-jet head apparatus, which provides a nearly uniform piezoelectric element and enables ejection of liquid at maximum output, is disclosed. The piezoelectric liquid-jet head has a piezoelectric elementprovided on one surface of a passage forming substratevia a vibration plate. The piezoelectric liquid jet head includes: a zirconium oxide layerformed on the surface of the passage forming substratea cerium oxide layerformed on the zirconium oxide layera superconductor layerformed on the cerium oxide layerand composed of a yttrium-barium-copper-oxygen-based material (YBCO); a lower electrodeformed on the superconductor layerand composed of strontium ruthenate; and a piezoelectric layerwhich is a single crystal epitaxially grown on the lower electrode