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:
Sep. 29, 2026
Filed:
Aug. 23, 2023
Fujifilm Corporation, Tokyo, JP;
Hiroyuki Kobayashi, Kanagawa, JP;
Seigo Nakamura, Kanagawa, JP;
Shinya Sugimoto, Kanagawa, JP;
Tsutomu Sasaki, Kanagawa, JP;
FUJIFILM CORPORATION, Tokyo, JP;
Abstract
A piezoelectric element includes a substrate, a first electrode, a first piezoelectric film, a second electrode, a second piezoelectric film, and a third electrode, in which both the first piezoelectric film and the second piezoelectric film have spontaneous polarizations aligned in a film thickness direction and directions of the spontaneous polarizations are the same, and in a case where in a hysteresis curve of one piezoelectric film, a coercive voltage Vcf, a coercive voltage Vcf, |Vcf−Vcf|=ΔVcf, and the larger of an absolute value of Vcfand an absolute value of Vcfis denoted by Vcf, and in a hysteresis curve of the other piezoelectric film, a coercive voltage Vcr, a coercive voltage Vcr, |Vcr−Vcr|=ΔVcr, and the larger of an absolute value of Vcrand an absolute value Vcris denoted by Vcr, ΔVcr<ΔVcf−0.2 and Vcr<Vcf−0.2 are satisfied.