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. 05, 2011
Filed:
Apr. 30, 2009
Hironobu Kazama, Matsumoto, JP;
Yuka Yonekura, Chino, JP;
Koji Sumi, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid jet head includes a flow passage forming substrate formed of a crystal substrate provided with a pressure generating chamber communicating with nozzle openings, and a piezoelectric element including a lower electrode, a piezoelectric layer, and an upper electrode, which are provided on the flow passage forming substrate to change pressure in the pressure generating chamber. The piezoelectric layer has a thickness of 5 μm or less and is formed of perovskite type crystals, and the distance between a diffraction peak position A of an X-ray derived from a surface () of the flow passage forming substrate and a diffraction peak position B of an X-ray derived from a surface () of the piezoelectric layer is within the range of 2θ=25.487±0.1°.