公开(公告)号：US20190172996A1

公开(公告)日：2019-06-06

申请号：US16273191

申请日：2019-02-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shinsuke Ikeuchi ,  Yoichi Mochida ,  Kansho Yamamoto ,  Takuo Hada ,  Hideya Horiuchi

IPC: H01L41/257 ,  H01L41/107 ,  H01L41/047 ,  H01L41/083 ,  H01L41/29

Abstract: A piezoelectric transformer that includes a vibration portion assembly having an output electrode, an output-side intermediate electrode, an input-side intermediate electrode, and an input electrode. The vibration portion assembly includes n vibration portions. The input electrode includes one to n input electrode pieces. The output electrode includes one to n output electrode pieces. Wiring lines are arranged such that voltages of opposite phases can be respectively applied to a first input electrode piece group of the input electrode pieces corresponding to odd-numbered vibration portions, and a second input electrode piece group of the input electrode pieces corresponding to even-numbered vibration portions. The second output electrode piece and the first output-side intermediate electrode piece are superposed with each other in the thickness direction. The first output electrode piece is not superposed with either of the first and second output-side intermediate electrode pieces in the thickness direction.

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：US11195984B2

公开(公告)日：2021-12-07

申请号：US16243171

申请日：2019-01-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shinsuke Ikeuchi ,  Yoichi Mochida ,  Kansho Yamamoto ,  Takuo Hada ,  Hideya Horiuchi

IPC: H01L41/107 ,  H01L41/187 ,  H01L41/047 ,  H01L41/053 ,  H01L41/293 ,  H01L41/314 ,  H01L41/318 ,  H01L41/332

Abstract: A piezoelectric transformer that includes a base and an upper layer supported by the base. The upper layer includes a first piezoelectric layer that includes the portion of the upper layer that is interposed between an output electrode and an intermediate electrode, and a second piezoelectric layer that is superposed with the first piezoelectric layer and includes the portion of the upper layer interposed between the intermediate electrode and an input electrode in at least n vibration portions. Moreover, the input electrode includes multiple input electrode pieces and the output electrode includes multiple output electrode pieces. In addition, wiring lines are routed such that voltages of opposite phases can be respectively applied to a first input electrode piece group and a second input electrode piece group with the potential of the intermediate electrode serving as a reference.

公开(公告)号：US20190148619A1

公开(公告)日：2019-05-16

申请号：US16243171

申请日：2019-01-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shinsuke Ikeuchi ,  Yoichi Mochida ,  Kansho Yamamoto ,  Takuo Hada ,  Hideya Horiuchi

IPC: H01L41/107 ,  H01L41/047 ,  H01L41/053

Abstract: A piezoelectric transformer that includes a base and an upper layer supported by the base. The upper layer includes a first piezoelectric layer that includes the portion of the upper layer that is interposed between an output electrode and an intermediate electrode, and a second piezoelectric layer that is superposed with the first piezoelectric layer and includes the portion of the upper layer interposed between the intermediate electrode and an input electrode in at least n vibration portions. Moreover, the input electrode includes multiple input electrode pieces and the output electrode includes multiple output electrode pieces. In addition, wiring lines are routed such that voltages of opposite phases can be respectively applied to a first input electrode piece group and a second input electrode piece group with the potential of the intermediate electrode serving as a reference.

公开(公告)号：US11233190B2

公开(公告)日：2022-01-25

申请号：US16273191

申请日：2019-02-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shinsuke Ikeuchi ,  Yoichi Mochida ,  Kansho Yamamoto ,  Takuo Hada ,  Hideya Horiuchi

IPC: H01L41/257 ,  H01L41/047 ,  H01L41/107 ,  H02N2/18 ,  B06B1/06 ,  H01L41/083 ,  H01L41/29

Abstract: A piezoelectric transformer that includes a vibration portion assembly having an output electrode, an output-side intermediate electrode, an input-side intermediate electrode, and an input electrode. The vibration portion assembly includes n vibration portions. The input electrode includes one to n input electrode pieces. The output electrode includes one to n output electrode pieces. Wiring lines are arranged such that voltages of opposite phases can be respectively applied to a first input electrode piece group of the input electrode pieces corresponding to odd-numbered vibration portions, and a second input electrode piece group of the input electrode pieces corresponding to even-numbered vibration portions. The second output electrode piece and the first output-side intermediate electrode piece are superposed with each other in the thickness direction. The first output electrode piece is not superposed with either of the first and second output-side intermediate electrode pieces in the thickness direction.

公开(公告)号：US11018292B2

公开(公告)日：2021-05-25

申请号：US15795579

申请日：2017-10-27

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shinsuke Ikeuchi ,  Kansho Yamamoto ,  Takuo Hada ,  Yoichi Mochida ,  Hideya Horiuchi

IPC: H01L41/09 ,  H01L41/107 ,  H01L41/047 ,  H01L41/04 ,  H01L41/31 ,  H01L41/083 ,  H01L41/187 ,  H01L41/314 ,  H04R17/00

Abstract: A piezoelectric device that includes a base member having an opening therein and an upper layer supported by the base member. The upper layer includes a vibration portion at a location corresponding to the opening in the base member. The vibration portion includes a lower electrode, an intermediate electrode and an upper electrode that are spaced apart from one another in a thickness direction of the piezoelectric device. The upper layer includes a first piezoelectric layer disposed so as to be at least partially sandwiched between the lower electrode and the intermediate electrode, and a second piezoelectric layer disposed so as to overlap with the first piezoelectric layer and so as to be at least partially sandwiched between the intermediate electrode and the upper electrode. The first piezoelectric layer and the second piezoelectric layer are different in relative permittivity in the thickness direction of the piezoelectric device.