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:
Jan. 20, 2026
Filed:
Feb. 14, 2024
Seiko Epson Corporation, Tokyo, JP;
Masanori Mikoshiba, Shimosuwa-machi, JP;
Motoki Takabe, Shiojiri, JP;
Harunobu Koike, Matsumoto, JP;
Kei Kiyose, Shinagawa-ku, JP;
Yasuhiro Itayama, Kai, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid ejecting head includes a substrate having pressure chambers in communication with nozzles through which a liquid is ejected, a vibration plate on the substrate, and a piezoelectric actuator including a first electrode, a piezoelectric layer, and a second electrode stacked in a first direction on the vibration plate. The piezoelectric layer of the piezoelectric actuator has an active portion that overlaps the pressure chamber, the first electrode, and the second electrode when viewed in the first direction and a non-active portion that does not overlap at least one of the first electrode and the second electrode when viewed in the first direction. A piezoelectric material forming the piezoelectric layer has a larger crystal grain size in the non-active portion than in the active portion.