公开(公告)号：US20130021116A1

公开(公告)日：2013-01-24

申请号：US13630069

申请日：2012-09-28

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Shinichi SOGOYA ,  Tetsuro OKUDA ,  Takuma KUZUSHITA

IPC: H03H9/64

CPC classification number: H03H9/6483 ,  H03H9/0222 ,  H03H9/14573 ,  H03H9/725

Abstract: An elastic wave device includes a piezoelectric substrate, an IDT electrode located on the piezoelectric substrate, and a capacitive electrode that is located on the piezoelectric substrate and is connected in series with the IDT electrode. The capacitive electrode includes a plurality of capacitive electrode portions, each of which includes a pair of mutually interdigitated comb-shaped electrodes. The plurality of capacitive electrode portions are connected with each other in parallel. The plurality of capacitive electrode portions are arranged such that an intersecting width direction D1 of the capacitive electrode portions is inclined with respect to an intersecting width direction D2 of the IDT electrode. The plurality of capacitive electrode portions are arrayed in an elastic-wave propagating direction D3 of the IDT electrode.

Abstract translation: 弹性波装置包括压电基板，位于压电基板上的IDT电极和位于压电基板上并与IDT电极串联连接的电容电极。 电容电极包括多个电容电极部，每个电容电极包括一对相互交错的梳状电极。 多个电容电极部彼此并联连接。 多个电容电极部分布置成使得电容电极部分的相交宽度方向D1相对于IDT电极的相交宽度方向D2倾斜。 多个电容电极部分以IDT电极的弹性波传播方向D3排列。

公开(公告)号：US20170194938A1

公开(公告)日：2017-07-06

申请号：US15468143

申请日：2017-03-24

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Akira MICHIGAMI ,  Koichiro KAWASAKI ,  Takuma KUZUSHITA

IPC: H03H9/64 ,  H03H9/72 ,  H03H9/60 ,  H03H9/145

CPC classification number: H03H9/64 ,  H03H9/02992 ,  H03H9/145 ,  H03H9/605 ,  H03H9/6483 ,  H03H9/725

Abstract: A ladder filter includes a piezoelectric substrate, an insulating film on the piezoelectric substrate, first and second electrodes provided on the piezoelectric substrate and including a pair of busbars and plurality of electrode fingers, a first line electrode at least a portion of which is defined by the busbar at one side of the first electrode, a second line electrode at least a portion of which is defined by the busbar at one side of the second electrode, and a third line electrode laminated on the second line electrode. The first line electrode and the second line electrode are electrically connected to different electric potentials. The first line electrode is separated from the second line electrode by a predetermined distance. At least a portion of the third line electrode is overlapped with at least a portion of the first line electrode with the insulating film interposed therebetween in a laminating direction.

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：US20170201228A1

公开(公告)日：2017-07-13

申请号：US15470950

申请日：2017-03-28

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuma KUZUSHITA

IPC: H03H9/13 ,  H03H9/205 ,  H03H9/54

CPC classification number: H03H9/13 ,  H03H9/14591 ,  H03H9/205 ,  H03H9/542 ,  H03H9/6483

Abstract: An elastic wave resonator includes series divided resonators on a piezoelectric substrate, first and second outer busbars, a first interstage busbar, first to fourth electrode fingers and first and second dummy electrode fingers. Third dummy electrode fingers are not provided at at least one of a side where the second electrode fingers are provided and a side where the third electrode fingers are provided or third dummy electrode fingers having a length smaller than lengths of the first and second dummy electrode fingers are provided at at least one of a side where the second electrode fingers are provided and a side where the third electrode fingers are provided. The third electrode fingers are arranged on an extension to which the second electrode fingers extend.

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：US20150155850A1

公开(公告)日：2015-06-04

申请号：US14615503

申请日：2015-02-06

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuma KUZUSHITA ,  Yasumasa TANIGUCHI ,  Takashi MIYAKE

IPC: H03H9/24

CPC classification number: H03H9/0576 ,  H03H7/463 ,  H03H9/0566 ,  H03H9/24 ,  H03H9/25 ,  H03H9/542 ,  H03H9/568 ,  H03H9/605 ,  H03H9/6483 ,  H03H9/706 ,  H03H9/725 ,  H03H2001/0085

Abstract: In an elastic wave filter device, an elastic wave filter element chip is mounted on a board. In the elastic wave filter element chip, a ladder filter including a plurality of series arm resonators and a plurality of parallel arm resonators are provided. In/on the board, a first inductor connected in parallel to the series arm resonator and a second inductor connected between the parallel arm resonators P1-P3 and a ground potential are provided. In/on the board, a shield electrode is located between the first inductor and the second inductor.

Abstract translation: 在弹性波滤波器装置中，弹性波滤波器元件芯片安装在板上。 在弹性波滤波器元件芯片中，设置有包括多个串联臂谐振器和多个并联臂谐振器的梯形滤波器。 在板上，提供与串联臂谐振器并联连接的第一电感器和连接在并联臂谐振器P1-P3和接地电位之间的第二电感器。 在板上，屏蔽电极位于第一电感器和第二电感器之间。