公开(公告)号：US20240082877A1

公开(公告)日：2024-03-14

申请号：US18274938

申请日：2021-02-03

Applicant: Suncall Corporation

Inventor： Satoru TAKASUGI

IPC: B06B1/06 ,  H10N30/03 ,  H10N30/063 ,  H10N30/87 ,  H10N30/88 ,  H10N39/00

CPC classification number: B06B1/0629 ,  H10N30/03 ,  H10N30/063 ,  H10N30/875 ,  H10N30/883 ,  H10N39/00

Abstract: An ultrasonic transducer of this invention includes a supporting plate with concave portions and waveguides opened to first and second surfaces, respectively, a flexible resin film fixed to the supporting plate, and piezoelectric elements fixed to the flexible resin film so that their center regions overlap with the corresponding concave portions and their peripheral regions overlap with the supporting plate in a plan view, a vibrating body formed by the piezoelectric element and the flexible resin film has a resonance frequency of the lowest flexural vibration mode higher than a driving frequency of the piezoelectric element, and the supporting plate is configured so that a resonance frequency of the lowest flexural vibration mode of the entire of the ultrasonic transducer is higher than the driving frequency of the piezoelectric element.

公开(公告)号：US20230034997A1

公开(公告)日：2023-02-02

申请号：US17788249

申请日：2020-01-30

Applicant: Suncall Corporation

Inventor： Satoru TAKASUGI

IPC: H01L41/113 ,  H01L41/193 ,  H01L41/047 ,  H01L41/053 ,  B06B1/06

Abstract: An ultrasonic transducer of this invention includes a rigid substrate with opening parts extending between bottom and top surfaces, a flexible resin film fixed to the top surface of the substrate to cover the opening parts, and piezoelectric elements fixed to a top surface of the resin film so as to overlap in a plan view with the opening parts, respectively. An arrangement pitch of the piezoelectric elements is preferably set to be equal to or less than 4.3 mm, and the piezoelectric element may have a rectangular shape in the plan view having longitudinal and lateral dimensions in the plan view with a maximum value of 4.0 mm or less, a circular shape in the plan view having a diameter of 4.0 mm or less, or an elliptical shape in the plan view having a major axis of 4.0 mm or less.

公开(公告)号：US20250041900A1

公开(公告)日：2025-02-06

申请号：US18713322

申请日：2021-11-25

Applicant: Suncall Corporation

Inventor： Satoru TAKASUGI

IPC: B06B3/00 ,  B06B1/06

Abstract: An ultrasonic transducer having a rigid supporting plate having first and second surfaces on one side and the other side in a thickness direction; a plurality of cavity portions opened to the first surface; a plurality of waveguides having first end portions on one side that are opened to bottom surfaces of the cavity portions and second end portions on the other side that are opened to the second surface; a flexible resin film fixed to the first surface of the supporting plate to cover the cavity portions; the cavity portions fixed to the flexible film resin film overlapped by piezoelectric elements in their center regions and overlapped by the first surface of the supporting plate in a plan view in their peripheral regions; and an air passage capable of introducing outside air into a plurality of sound passages formed by the pluralities of cavity portions and waveguides.