公开(公告)号：US20240380379A1

公开(公告)日：2024-11-14

申请号：US18781028

申请日：2024-07-23

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroya SUZUKI ,  Sunao YAMAZAKI ,  Toru YAMAJI

IPC: H03H9/13 ,  H03H9/05 ,  H03H9/17

Abstract: An acoustic wave device includes an element substrate, a piezoelectric layer, a functional electrode on the piezoelectric layer, and a mounting substrate. The element substrate includes a gap portion at a position overlapping at least a portion of the functional electrode as seen in a lamination direction of the element substrate and the piezoelectric layer, and the mounting substrate includes a ground electrode at a position overlapping the functional electrode in the lamination direction.

公开(公告)号：US20230017921A1

公开(公告)日：2023-01-19

申请号：US17953380

申请日：2022-09-27

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toru YAMAJI

IPC: H03H9/25 ,  H01L23/31 ,  H01L23/10 ,  H03H9/05 ,  H03H9/10 ,  H03H9/02

Abstract: An electronic component includes a mounting substrate, and first and second devices each including a functional element. The first device is spaced apart from and faces the mounting substrate. The second device is located on the mounting substrate and faces the first device. A functional element of the first device is located on a first surface facing the second device, in the first device. A functional element of the second device is located on a second surface facing the first device, in the second device.

公开(公告)号：US20210203306A1

公开(公告)日：2021-07-01

申请号：US17108039

申请日：2020-12-01

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Tetsu TAKAHASHI ,  Toru YAMAJI ,  Takuma KUZUSHITA

IPC: H03H9/64 ,  H03H9/25 ,  H03H9/02 ,  H03H9/145

Abstract: An acoustic wave filter includes a first resonance circuit including a first series arm resonator and a first capacitive element. The first series arm resonator is provided on a path connecting a first terminal and a second terminal. The first capacitive element is coupled in parallel with the first series arm resonator. The first series arm resonator includes a first divided resonator and a second divided resonator coupled in series with each other. The first resonance circuit includes a second resonance circuit including the first divided resonator and a second capacitive element coupled in parallel with the first divided resonator.

公开(公告)号：US20250112612A1

公开(公告)日：2025-04-03

申请号：US18960125

申请日：2024-11-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toru YAMAJI ,  Sunao YAMAZAKI ,  Hiroya SUZUKI

IPC: H03H9/02 ,  H03H9/05

Abstract: An acoustic wave device includes a piezoelectric layer, at least one pair of electrodes, and a protective film. The piezoelectric layer includes first and second major surfaces opposing each other in a first direction. The at least one pair of electrodes are on at least one of the first and second major surfaces. The protective film covers at least a portion of the pair of electrodes. The protective film includes a first-component insulative film including a first component and in contact with the pair of electrodes, and a second-component insulative film including a second component and located at the surface layer of the protective film. The first-component insulative film has a higher moisture resistance than the second-component insulative film. The second-component insulative film has a higher plasma resistance than the first-component insulative film.

公开(公告)号：US20250015781A1

公开(公告)日：2025-01-09

申请号：US18891039

申请日：2024-09-20

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Katsuya DAIMON ,  Akihiro IYAMA ,  Toru YAMAJI

IPC: H03H9/145 ,  H03H9/02 ,  H03H9/05

Abstract: An acoustic wave device includes a support, a piezoelectric layer on the support, an IDT electrode on the piezoelectric layer and including busbars and electrode fingers, and mass-added films on the electrode fingers. An acoustic reflection portion is provided in the support and overlaps at least a portion of the IDT electrode. d/p is about 0.5 or less. When viewed in an electrode finger orthogonal direction, a region in which the electrode fingers adjacent to each other overlap each other is an intersecting region including a central region, and first and second edge regions. At least a portion of the mass-added films overlaps the central region in plan view.

公开(公告)号：US20250015779A1

公开(公告)日：2025-01-09

申请号：US18897222

申请日：2024-09-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toru YAMAJI ,  Sunao YAMAZAKI ,  Hiroya SUZUKI

IPC: H03H9/13 ,  H03H9/02

Abstract: An acoustic wave device includes a support including a support substrate, a piezoelectric layer on the support in a first direction, a functional electrode on the piezoelectric layer, and a reinforcement film on the piezoelectric layer. The support includes a space portion that opens on a side of the piezoelectric layer, and an extended passage extending farther toward an outer side than an edge of the space portion in a second direction intersecting the first direction. A through-hole is provided at a position not overlapping the functional electrode in plan view in the first direction, communicates with the extended passage, and penetrates the piezoelectric layer. The reinforcement film is provided in a region between the through-hole and the space portion and overlaps at least a portion of a region where the piezoelectric layer and the extended passage overlap each other in the plan view.

公开(公告)号：US20240388275A1

公开(公告)日：2024-11-21

申请号：US18786653

申请日：2024-07-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toru YAMAJI ,  Takuma KUZUSHITA ,  Masato KYOYA

IPC: H03H9/05 ,  H03H9/10 ,  H03H9/145

Abstract: An acoustic wave device includes a piezoelectric substrate including a functional electrode on a first main surface of the piezoelectric substrate, a functional wire on the first main surface and connected to the functional electrode, and a connection wire on the first main surface, connected to the functional wire, and extending to an edge portion of the first main surface. An acoustic wave element chip is defined by the piezoelectric substrate, the functional electrode, the functional wire, and the connection wire. The acoustic wave device includes a mounting substrate on which the acoustic wave element chip is mounted and including a third main surface facing the first main surface of the piezoelectric substrate, and a mounting substrate wire on the third main surface. D1

公开(公告)号：US20210265970A1

公开(公告)日：2021-08-26

申请号：US17161723

申请日：2021-01-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toru YAMAJI ,  Tetsu TAKAHASHI

IPC: H03H9/02 ,  H03H9/145 ,  H03H9/64 ,  H03H9/25

Abstract: An acoustic wave device includes first and second acoustic wave elements. The first acoustic wave element is disposed on a piezoelectric substrate, and includes at least one first IDT electrode. The second acoustic wave element is disposed on the piezoelectric substrate, and includes at least one second IDT electrode. The first and second acoustic wave elements are adjacent to each other in the direction of acoustic wave propagation. A diffracting component that diffracts an acoustic wave is disposed between the first IDT electrode and the second IDT electrode. The diffracting component includes a gap that defines and functions as a slit to diffract an acoustic wave.