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. 28, 2015
Filed:
Mar. 10, 2010
Tsuyoshi Mita, Ashigarakami-gun, JP;
Tsuyoshi Mita, Ashigarakami-gun, JP;
FUJIFILM Corporation, , JP;
Abstract
A liquid ejection head includes: a flow channel unit having a plurality of pressure chambers arranged in a plane; and piezoelectric actuators which change volume of the plurality of pressure chambers so as to apply pressure to liquid inside the plurality of the pressure chambers respectively, wherein the piezoelectric actuators comprise: a diaphragm which constitutes one wall of the plurality of pressure chambers; a common electrode formed on a surface of the diaphragm; a piezoelectric layer formed on a surface of the common electrode; a plurality of ring-shaped individual electrodes formed on a surface of the piezoelectric layer and formed in regions which overlap respectively with marginal portions which are non-central portions of the plurality of pressure chambers, as viewed from a direction perpendicular to the plane; and central electrodes connected electrically to the common electrode, and formed so as not to make contact with the plurality of ring-shaped individual electrodes in inner regions of the plurality of ring-shaped individual electrodes, as viewed from the direction perpendicular to the plane.