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. 14, 2025
Filed:
Mar. 09, 2023
Seiko Epson Corporation, Tokyo, JP;
Daisuke Nagano, Matsumoto, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
A piezoelectric device includes: a substrate having a plurality of recesses; a vibration plate provided on one side of the substrate; and a piezoelectric actuator including layers of first electrodes, a piezoelectric layer, and a second electrode provided in this order on the vibration plate side, and the piezoelectric actuator has a plurality of active portions including the first electrode, the second electrode, and the piezoelectric layer held between the first electrode and the second electrode, the first electrode serves as an individual electrode individually provided for each active portion, the second electrode serves as a common electrode shared by the plurality of active portions, and the second electrode includes a first end portion serving as a reference and a protruding portion protruding from an end portion of the active portion beyond the first end portion toward a coupling electrode electrically coupled to the first electrode.