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:
Mar. 24, 2026
Filed:
Mar. 29, 2023
Seiko Epson Corporation, Tokyo, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
An ultrasonic sensor includes: a substrate having a first surface and a second surface at an opposite side from the first surface, the substrate having an opening penetrating the substrate from the first surface to the second surface; a vibration plate covering a first surface side of the opening; piezoelectric elements provided at a surface of the vibration plate at an opposite side from the opening and each including a first electrode, a piezoelectric layer, and a second electrode; and an elastic layer in contact with the vibration plate in the opening, in which a portion in which the first electrode, the piezoelectric layer, and the second electrode overlap is defined as an active portion, and a plurality of the active portions face the one opening, and a thickness of the elastic layer is equal to or larger than half a thickness of the substrate and less than the thickness of the substrate, and the thickness of the elastic layer in each of the active portions is uniform.