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:
Oct. 06, 2026
Filed:
Mar. 15, 2023
Seiko Epson Corporation, Tokyo, JP;
Koji Ohashi, Matsumoto, JP;
Yasuaki Hamada, Chino, JP;
Kazuya Kitada, Matsumoto, JP;
Yoshiki Yano, Chino, JP;
Tsutomu Asakawa, Shiojiri, JP;
Masahiro Takeuchi, Chino, JP;
Yasuhiro Horiba, Shiojiri, JP;
Yasuhiro Itayama, Kai, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A piezoelectric element includes an adhesion layer formed at a vibration plate and containing titanium, a lower electrode formed at the adhesion layer, a diffusion reduction layer formed at the lower electrode and containing iridium, a seed layer formed at the diffusion reduction layer and containing bismuth, a piezoelectric layer formed at the seed layer and containing potassium, sodium, and niobium, and an upper electrode formed at the piezoelectric layer.