公开(公告)号：US20210135645A1

公开(公告)日：2021-05-06

申请号：US17072089

申请日：2020-10-16

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Junpei YASUDA ,  Kenichi UESAKA ,  Tomohisa KOMURA ,  Kentaro FUNAHASHI ,  Shizuka KAWAMURA

IPC: H03H7/01 ,  H04B1/00

Abstract: A multiplexer includes a first filter circuit including a pass band that is a first frequency band, a second filter circuit including a pass band that is a second frequency band, and an additional circuit. The first filter circuit includes a first terminal connected to a common terminal and a second terminal connected to a first input/output terminal. The second filter circuit includes a third terminal connected to the common terminal and a fourth terminal connected to a second input/output terminal. The additional circuit is connected to the fourth terminal and one of the first and second terminals and includes a series-arm circuit on a series-arm path connecting the fourth terminal to the one of the terminals and a parallel-arm circuit on a parallel-arm path connecting the series-arm path to the ground. The parallel-arm circuit includes only an inductor, a capacitor, or an LC parallel-arm resonant circuit in series with the parallel-arm path.

公开(公告)号：US20140197903A1

公开(公告)日：2014-07-17

申请号：US14217924

申请日：2014-03-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichi UESAKA

IPC: H03H9/64 ,  H03H9/02

CPC classification number: H03H9/725 ,  H01L2224/16225 ,  H01L2924/181 ,  H03H9/02535 ,  H03H9/0542 ,  H03H9/0576 ,  H03H9/059 ,  H03H9/64 ,  H03H9/6483 ,  H03H9/706 ,  H01L2924/00012

Abstract: A signal separation device is a duplexer in which a reception frequency band is located at higher frequencies than a transmission frequency band. A series arm of a ladder transmission filter includes a plurality of series arm resonators, and parallel arms respectively include parallel arm resonators. The parallel arm resonators include the parallel arm resonators having resonant frequencies lower than those of the series arm resonators and the parallel arm resonator that has a resonant frequency which is located within the reception frequency band and which is higher than the resonant frequency of the series arm resonators and that has a lower capacitance than the series arm resonators and the parallel arm resonators.

Abstract translation: 信号分离装置是其中接收频带位于比发送频带更高的频率的双工器。 梯形发送滤波器的串联臂包括多个串联臂谐振器，并且并联臂分别包括并联臂谐振器。 并联臂谐振器包括谐振频率低于串联臂谐振器和并联臂谐振器的并联臂谐振器，其具有位于接收频带内并且高于串联臂的谐振频率的谐振频率 谐振器，并且具有比串联臂谐振器和并联臂谐振器更低的电容。

公开(公告)号：US20190165765A1

公开(公告)日：2019-05-30

申请号：US16183773

申请日：2018-11-08

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichi UESAKA

IPC: H03H11/06 ,  H03H11/34

Abstract: A filter device includes a terminal, a switch that includes a common terminal and selection terminals and switches a connection of the common terminal to one of the selection terminals, a series arm resonator, and filter circuits. The filter circuits are connected to one end of the series arm resonator. The common terminal is connected to the terminal. One of the selection terminals is connected between one end of the series arm resonator and the filter circuits. Another one of the selection terminals is connected to the other end of the series arm resonator.

公开(公告)号：US20130300519A1

公开(公告)日：2013-11-14

申请号：US13943963

申请日：2013-07-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Daisuke TAMASAKI ,  Kenichi UESAKA

IPC: H03H9/72 ,  H03H9/64

CPC classification number: H03H9/64 ,  H01L41/1873 ,  H03H9/02559 ,  H03H9/02834 ,  H03H9/14541 ,  H03H9/54 ,  H03H9/6483 ,  H03H9/725

Abstract: A surface acoustic wave filter device uses a Rayleigh wave as a main mode, and includes a ladder type surface acoustic wave filter unit. A thickness of a dielectric layer in a surface acoustic wave resonator configuring a series arm resonator is different from thickness of a dielectric layer in a surface acoustic wave resonator configuring a parallel arm resonator. A propagation orientation of a surface acoustic wave in the surface acoustic wave resonator configuring the series arm resonator is different from a propagation orientation of a surface acoustic wave in the surface acoustic wave resonator configuring the parallel arm resonator.

Abstract translation: 表面声波滤波装置使用瑞利波作为主模式，并且包括梯型声表面波滤波器单元。 构成串联臂谐振器的表面声波谐振器中的介电层的厚度与构成并联臂谐振器的表面声波谐振器中的电介质层的厚度不同。 构成串联臂谐振器的声表面波谐振器中的声表面波的传播方向与构成并联臂谐振器的表面声波谐振器中的表面声波的传播方向不同。

公开(公告)号：US20240223157A1

公开(公告)日：2024-07-04

申请号：US18607633

申请日：2024-03-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichi UESAKA

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

CPC classification number: H03H9/14541 ,  H03H9/02661 ,  H03H9/6483

Abstract: An acoustic wave filter device includes series arm resonators and parallel arm resonators. A parallel arm resonator that has the highest resonant frequency has a reflector wavelength that is the same or substantially the same as an IDT wavelength and has an IDT-reflector gap that is about 0.5 times the reflector wavelength. The remaining parallel arm resonators each have a reflector wavelength longer than the IDT wavelength and have an IDT-reflector gap shorter than about 0.5 times the reflector wavelength.

公开(公告)号：US20220094325A1

公开(公告)日：2022-03-24

申请号：US17542803

申请日：2021-12-06

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichi UESAKA

IPC: H03H9/02 ,  H03H9/56

Abstract: An acoustic wave device includes a dielectric film covering an IDT electrode. The IDT electrode includes first and second edge regions and first and second high acoustic velocity regions. The first and second edge regions are low acoustic velocity regions. The first and second high acoustic velocity regions are on outer sides of an intersecting width region where first and second electrode fingers are adjacent to each other in an acoustic wave propagation direction. A thickness of the dielectric film on the first and second edge regions is greater than that of the dielectric film on the first and second high acoustic velocity regions.

公开(公告)号：US20190035754A1

公开(公告)日：2019-01-31

申请号：US16150354

申请日：2018-10-03

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichi UESAKA

IPC: H01L23/00 ,  H01L23/498 ,  H03H9/25 ,  H01L41/09 ,  H01L41/25 ,  H01L23/538 ,  H01L23/28

Abstract: An elastic wave element includes a vibrator, an electrode pad, a UBM portion including a first end surface joined to the electrode pad, and a bump joined to a second end surface of the UBM portion. Joint terminals are defined by joining the electrode pad, the UBM portion, and the bump. A shortest distance between a specified joint terminal and remaining joint terminals is an inter-bump distance of the specified joint terminal. Second end surfaces of first and second joint terminal have areas greater than areas of second end surfaces of remaining joint terminals. The inter-bump distance of the first joint terminal is longer than the shortest inter-bump distance of the joint terminals and is the longest of the inter-bump distances. The second joint terminal is spaced the longest inter-bump distance from the first joint terminal.

公开(公告)号：US20180102758A1

公开(公告)日：2018-04-12

申请号：US15828462

申请日：2017-12-01

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichi UESAKA

IPC: H03H9/10 ,  H03H9/05 ,  H03H9/02 ,  H03H9/25 ,  H01L23/544

CPC classification number: H03H9/1085 ,  H01L23/544 ,  H01L2223/54406 ,  H01L2224/16225 ,  H01L2924/1815 ,  H03H9/02559 ,  H03H9/059 ,  H03H9/25

Abstract: An elastic wave device includes an elastic wave element mounted on a mounting substrate, with the elastic wave element being sealed by a sealing resin layer. The elastic wave element is bonded to electrode lands on the mounting substrate using bumps. Recessed portions are provided on a surface of the sealing resin layer on a side opposite to the side facing the mounting substrate. A ratio D/H between a depth of the recessed portions, and a distance of a portion of the sealing resin layer from the surface to a second main surface of a piezoelectric substrate, is no less than about 1/3.

公开(公告)号：US20210281245A1

公开(公告)日：2021-09-09

申请号：US17170971

申请日：2021-02-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichi UESAKA

IPC: H03H9/64 ,  H03H9/00 ,  H03H9/145 ,  H03H9/25 ,  H03H9/72

Abstract: An acoustic wave filter device includes first and second terminals, a longitudinally coupled resonator coupled between the first terminal and the second terminal, and an inductor connected between a path and a ground potential, the path connecting the first terminal and the longitudinally coupled resonator to each other. The longitudinally coupled resonator includes at least one first IDT electrode coupled to the first terminal, and at least one second IDT electrode connected to the second terminal. A total capacitance value of the at least one first IDT electrode is smaller than a total capacitance value of the at least one second IDT electrode.

公开(公告)号：US20210281244A1

公开(公告)日：2021-09-09

申请号：US17178301

申请日：2021-02-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichi UESAKA

IPC: H03H9/64 ,  H03H9/72 ,  H03H9/25

Abstract: An acoustic wave filter device includes first and second terminals, an inductor connected to the first terminal, and a longitudinally coupled resonator coupled between the inductor and the second terminal. The longitudinally coupled resonator includes at least one first IDT electrode coupled to the first terminal, and at least one second IDT electrode connected to the second terminal. A total capacitance value of the at least one first IDT electrode is greater than a total capacitance value of the at least one second IDT electrode.