公开(公告)号：US11832522B2

公开(公告)日：2023-11-28

申请号：US17205062

申请日：2021-03-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Fumiya Kurokawa ,  Shinsuke Ikeuchi ,  Yoichi Mochida ,  Seiji Umezawa ,  Nobuyoshi Adachi ,  Yutaka Kishimoto

IPC: H10N30/20 ,  H10N30/88 ,  H10N30/30 ,  H10N30/853 ,  H10N30/04

CPC classification number: H10N30/2041 ,  H10N30/304 ,  H10N30/8542 ,  H10N30/88 ,  H10N30/04

Abstract: A piezoelectric transducer includes beam portions each with a fixed end portion and extending in a direction away from the fixed end portion. A base portion is connected to the fixed end portion of each of the beam portions. The beam portions extends in a same plane, and respective extending directions of at least two beam portions are different from each other. The beam portions each include a single crystal piezoelectric layer having a polarization axis in a same direction, an upper electrode layer, and a lower electrode layer. A polarization axis has a polarization component in the plane. An axial direction of an orthogonal axis that is orthogonal to the polarization axis and extends in the above-described plane intersects with an extending direction of each of the plurality of beam portions.

公开(公告)号：US12275040B2

公开(公告)日：2025-04-15

申请号：US17507845

申请日：2021-10-22

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Seiji Umezawa ,  Shinsuke Ikeuchi ,  Fumiya Kurokawa ,  Nobuyoshi Adachi ,  Masayuki Suzuki

IPC: B06B1/06

Abstract: A piezoelectric device includes a substrate, a piezoelectric element, and a lid. The piezoelectric element includes a base portion and a membrane portion. The base portion is on a first main surface and has an annular outer shape when viewed from a normal direction of the first main surface. The membrane portion is at an inner side portion of the base portion when viewed from the normal direction. The lid is on the first main surface, covers the piezoelectric element, and is spaced apart from the piezoelectric element on the first main surface side. In the substrate, a first through hole extending from the first main surface to a second main surface is facing the membrane portion. The membrane portion includes a through slit.

公开(公告)号：US20220241817A1

公开(公告)日：2022-08-04

申请号：US17724523

申请日：2022-04-20

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shinsuke Ikeuchi ,  Seiji Umezawa ,  Fumiya Kurokawa ,  Masayuki Suzuki

IPC: B06B1/06 ,  H01L41/053 ,  H01L41/113 ,  H01L41/187

Abstract: A piezoelectric device includes an outer base, a protruding base, and only one cantilevered portion. A protruding base includes a protrusion and a tip portion. The protrusion protrudes from an internal circumferential surface of the outer base toward a center of a ring shape. The tip portion is connected to the protrusion and located at the center. The cantilevered portion is connected to the tip portion, and extends while being spaced apart from the protrusion. The cantilevered portion includes a fixed end portion and a free periphery. The fixed end portion is connected to the tip portion. The free periphery is located along the internal circumferential surface. The protrusion is located between a first end and a second end of the free periphery.

公开(公告)号：US12262176B2

公开(公告)日：2025-03-25

申请号：US18109900

申请日：2023-02-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Seiji Umezawa ,  Shinsuke Ikeuchi ,  Masayuki Suzuki ,  Matti Liukku ,  Ville-Pekka Rytkönen ,  Anssi Blomqvist ,  Ville Kaajakari

IPC: H04R17/02

Abstract: A transducer includes a first connection portion connecting a first tip and a second tip to each other. The first connection portion is surrounded by a split slit connecting a center of the first tip, a center of a base, and a center of the second tip, the first tip, and the second tip.

公开(公告)号：US12138658B2

公开(公告)日：2024-11-12

申请号：US17894217

申请日：2022-08-24

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Fumiya Kurokawa ,  Yasuhiro Aida ,  Shinsuke Ikeuchi ,  Seiji Umezawa ,  Masayuki Suzuki

IPC: B06B1/02 ,  G10K11/02

Abstract: An ultrasonic transducer includes first and second acoustic transducers and a housing with a bottomed tubular shape. The second acoustic transducer includes an annular section supporting a second membrane section and contacting an entire periphery of the second membrane section, and an acoustic matching plate facing the second membrane section and spaced apart from the second membrane section. The acoustic matching plate is connected to a surrounding wall portion defining a sealed space with the housing. An ultrasonic transmission path sandwiched between the first membrane section and the second membrane section is provided in the sealed space. A maximum inner width of the ultrasonic transmission path is smaller than a maximum inner width of the surrounding wall portion.

公开(公告)号：US11979713B2

公开(公告)日：2024-05-07

申请号：US17853979

申请日：2022-06-30

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Seiji Umezawa ,  Matti Liukku ,  Ville-Pekka Rytkönen ,  Anssi Blomqvist ,  Shinsuke Ikeuchi ,  Fumiya Kurokawa ,  Masayuki Suzuki

IPC: H04R17/02 ,  H10N30/853

CPC classification number: H04R17/02 ,  H10N30/8542

Abstract: A piezoelectric device includes a connecting section connecting a pair of beam sections adjacent to each other. The connecting section is connected to one of the pair of beam sections at a first end portion. The connecting section is connected to another of the pair of beam sections at a second end portion. The second end portion faces the first end portion in a direction in which the pair of beam sections are aligned. A second coupling portion is located along a first coupling portion. The connecting section includes only one first end portion. The connecting section includes only one second end portion. Each of the first end portion and the second end portion is closer to a tip end portion than to a fixed end portion of each of the pair of beam sections.

公开(公告)号：US11856365B2

公开(公告)日：2023-12-26

申请号：US17830501

申请日：2022-06-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shinsuke Ikeuchi ,  Seiji Umezawa ,  Masayuki Suzuki ,  Fumiya Kurokawa

IPC: H04R17/02 ,  H10N30/853

CPC classification number: H04R17/02 ,  H04R2400/01 ,  H10N30/8542

Abstract: A transducer includes a base, beams, and a coupler. The beams each include a piezoelectric layer, a first electrode layer, and a second electrode layer. The coupler is fitted in slits between adjacent beams to define a connection between the beams. The coupler extends from an upper portion of the base into each of the slits without a break. A Young's modulus of the material of the coupler is lower than a Young's modulus of the material of the piezoelectric layer. A maximum thickness of the coupler in the upper portion of the base in the direction of the central axis of the base is greater than a thickness of each of the beams.