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:
Dec. 02, 2025
Filed:
Apr. 07, 2023
Denso Corporation, Kariya, JP;
Tomoya Jomori, Kariya, JP;
Ryuichiro Abe, Kariya, JP;
Daisuke Kobayashi, Kariya, JP;
Takahiro Higuchi, Kariya, JP;
Yutaka Hayakawa, Kariya, JP;
Minekazu Sakai, Kariya, JP;
Kazuaki Mawatari, Kariya, JP;
Yuji Koyama, Kariya, JP;
Masaaki Tanaka, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A piezoelectric element includes a plurality of vibration regions that are separated from each other by a slit, and the slit is formed to have a tapered portion that is tapered from a first surface of the vibration regions on an opposite side to a support to a second surface opposite to the first surface. An electrode film is positioned inside than the slit when being viewed from a normal direction orthogonal to the first surface, and an angle formed by a side surface of the tapered portion in the vibration region and a surface parallel to the first surface is in a range of 39 to 81 degrees.