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. 16, 2025
Filed:
May. 17, 2023
Rohm Co., Ltd., Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
A transducer includes a substrate containing silicon and a piezoelectric element disposed on the substrate. The substrate includes a film body including a first surface and a second surface facing in mutually opposite directions in a thickness direction of the substrate and a frame body surrounding the film body when the film body is viewed from the thickness direction. The piezoelectric element is disposed on the first surface of the film body. A part of an outer edge of the film body when viewed from the thickness direction forms a connection portion connected to the frame body, and a remaining part of the outer edge excluding the connection portion is separated from the frame body. The substrate includes a protrusion protruding in the thickness direction from a region including at least a part of the remaining part of the outer edge of the second surface.