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:
Aug. 05, 2025
Filed:
Sep. 27, 2019
Nitto Denko Corporation, Ibaraki, JP;
Daisuke Nakamura, Ibaraki, JP;
Naoki Nagaoka, Ibaraki, JP;
Manami Kurose, Ibaraki, JP;
Hironobu Machinaga, Ibaraki, JP;
Taketo Ishikawa, Ibaraki, JP;
Takahiko Yanagitani, Tokyo, JP;
Takahiro Shimizu, Tokyo, JP;
NITTO DENKO CORPORATION, Ibaraki, JP;
Abstract
A piezoelectric device having a high conversion efficiency between electrical energy and mechanical energy is provided. The piezoelectric device has first electrode, a second electrode, and a piezoelectric layer provided between the first electrode and the second electrode, wherein the piezoelectric layer is formed of a ZnO-based material having a wurtzite crystal structure to which a metal that does not cause the piezoelectric layer to exhibit conductivity is added, and wherein a squared value of a electromechanical coupling coefficient in thickness vibration mode is 6.5% or more.