公开(公告)号：US11936366B2

公开(公告)日：2024-03-19

申请号：US17186053

申请日：2021-02-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yoshinori Kameoka

IPC: H03H9/02 ,  H03H3/08 ,  H03H9/145 ,  H03H9/205 ,  H03H9/64 ,  H03H9/70 ,  H03H9/72 ,  H03H3/02 ,  H03H9/56

CPC classification number: H03H9/02992 ,  H03H3/08 ,  H03H9/14541 ,  H03H9/205 ,  H03H9/6433 ,  H03H9/6483 ,  H03H9/70 ,  H03H9/725 ,  H03H3/02 ,  H03H9/562

Abstract: An elastic wave device includes a piezoelectric substrate, and elastic wave elements on the piezoelectric substrate and including IDT electrodes, respectively. The IDT electrode of a first of the elastic wave elements includes first and second busbars, and the IDT electrode of a second of the elastic wave elements includes third and fourth busbars. The second busbar and the third busbar extend parallel or substantially parallel to each other, and are spaced by a gap in a direction perpendicular or substantially perpendicular to an elastic-wave propagating direction. Each of the second and third busbars includes first and second electrode layers at least a portion of which is laminated on the first electrode layer. The second electrode layer of the second busbar is cut in at least one location in a direction crossing the elastic-wave propagating direction.

公开(公告)号：US20230327643A1

公开(公告)日：2023-10-12

申请号：US18025126

申请日：2020-09-22

Applicant: HANGZHOU XINGHE TECHNOLOGY CO., LTD.

Inventor： Linping LI ,  Jinghao SHENG ,  Zhou JIANG

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

CPC classification number: H03H9/25 ,  H03H9/145 ,  H03H9/6433

Abstract: An acoustic resonator assembly and a filter are disclosed. The acoustic resonator assembly includes at least two acoustic resonators vertically connected to each other. The acoustic resonator includes: an acoustic mirror, a bottom electrode layer, a piezoelectric layer, and a top electrode layer that are arranged on a substrate. An active area of the acoustic resonator is defined by an overlapping area of the acoustic mirror, the bottom electrode layer, the piezoelectric layer, and the top electrode layer. The acoustic resonator further includes a support layer arranged on the substrate or the piezoelectric layer on a periphery of a projection of the acoustic mirror on the substrate. The at least two acoustic resonators are vertically connected to each other through the support layer. The filter significantly reduces the volume and the area of a device, improves design freedom and reduces design difficulty, enhances product performance and greatly reduces costs.

公开(公告)号：US09912318B2

公开(公告)日：2018-03-06

申请号：US14963315

申请日：2015-12-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuichi Takamine

IPC: H03H9/72 ,  H03H9/64 ,  H03H9/00 ,  H03H9/54 ,  H03H9/70 ,  H03H9/145

CPC classification number: H03H9/725 ,  H03H9/0028 ,  H03H9/0057 ,  H03H9/008 ,  H03H9/0085 ,  H03H9/14588 ,  H03H9/54 ,  H03H9/6433 ,  H03H9/6483 ,  H03H9/70

Abstract: In a filter device, first and second filter sections are connected in parallel between an input terminal and an output terminal. The first filter section is a longitudinally coupled resonator-type elastic wave filter including first and second inter-stage wiring lines with a two-stage cascading connection. The second filter section is a longitudinally coupled resonator-type elastic wave filter including third and fourth inter-stage wiring lines with a two-stage cascading connection. The phases of signals flowing in the third inter-stage wiring line and the second inter-stage wiring line are inverse. Terminal portions of an interdigital transducer electrode connected to the second inter-stage wiring line and an interdigital transducer electrode connected to the third inter-stage wiring line that are connected to a potential that is not a hot-side potential are connected by a virtual ground wiring line. A hot-side wiring portion that is adjacent to the virtual ground wiring line is disposed on an insulating film provided on the piezoelectric substrate.

公开(公告)号：US09806693B2

公开(公告)日：2017-10-31

申请号：US15051828

申请日：2016-02-24

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuichi Takamine

IPC: H03H9/72 ,  H03H9/64 ,  H03H9/00 ,  H03H9/46

CPC classification number: H03H9/725 ,  H03H9/0009 ,  H03H9/009 ,  H03H9/46 ,  H03H9/6433 ,  H03H9/6436 ,  H03H9/6479 ,  H03H9/6483

Abstract: A duplexer includes a transmission filter with a ladder circuit configuration and a reception filter including a ladder filter portion connected to an antenna terminal and a longitudinally coupled resonator-type surface acoustic wave filter. In the transmission filter, a coupling capacitor is connected between an end portion of an inductor nearer to parallel arm resonators and a wiring line connecting the series arm resonators of the ladder filter portion to each other in the reception filter.

公开(公告)号：US20170310301A1

公开(公告)日：2017-10-26

申请号：US15485375

申请日：2017-04-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Junpei YASUDA

IPC: H03H9/54 ,  H03H9/66 ,  H03H9/00 ,  H03H9/70 ,  H01L41/047

CPC classification number: H03H9/542 ,  H01L41/047 ,  H03H9/0004 ,  H03H9/6433 ,  H03H9/6483 ,  H03H9/66 ,  H03H9/70 ,  H03H9/72

Abstract: In an elastic wave filter device, a first filter including a first pass band and a second filter including a second pass band are common-connected at a common connection point. The first filter includes, on the common connection point side, a serial arm resonator, a parallel arm resonator, or a longitudinally coupled resonator-type elastic wave filter, and generates a fundamental wave and a high-order mode. A resonant frequency of the high-order mode on a higher frequency side relative to the first pass band of the first filter is smaller than the second pass band. On the common connection point side, a serial arm resonator in which the resonant frequency is not the highest, a parallel arm resonator, or a longitudinally coupled resonator-type elastic wave filter, is disposed.

公开(公告)号：US20170149410A1

公开(公告)日：2017-05-25

申请号：US15290098

申请日：2016-10-11

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yohei KONAKA

IPC: H03H9/56 ,  H03H9/70

CPC classification number: H03H9/6433 ,  H03H9/02905 ,  H03H9/02992 ,  H03H9/56 ,  H03H9/6473 ,  H03H9/6476 ,  H03H9/6489 ,  H03H9/70 ,  H03H9/725

Abstract: An elastic wave device includes first and second longitudinally coupled resonator elastic wave elements aligned on a piezoelectric substrate. A second reflector of the first longitudinally coupled resonator elastic wave element and a third reflector of the second longitudinally coupled resonator elastic wave element are adjacent to each other in an elastic wave propagation direction. A ground interconnection extends in a direction intersecting with the elastic wave propagation direction and in a region between the second reflector and the third reflector. A gap in one portion of the ground interconnection includes a different acoustic velocity portion where an acoustic velocity is different from an acoustic velocity in another portion of the ground interconnection.

公开(公告)号：US20170047905A1

公开(公告)日：2017-02-16

申请号：US15334465

申请日：2016-10-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Masato ARAKI ,  Katsuya DAIMON

IPC: H03H9/02 ,  H03H9/64 ,  H03H9/25

CPC classification number: H03H9/02535 ,  H03H9/02992 ,  H03H9/14532 ,  H03H9/14541 ,  H03H9/1457 ,  H03H9/25 ,  H03H9/64 ,  H03H9/6433

Abstract: An elastic wave device includes an IDT provided on a piezoelectric substrate. The IDT includes edge areas in which an elastic wave propagation velocity is slower than an elastic wave propagation velocity in a center area of an electrode finger intersecting region. The edge areas are provided on both sides of the center area in an intersecting width direction. The IDT includes a first section where the propagation velocity in the center area is relatively fast and a second section where the propagation velocity in the center area is relatively slow in the elastic wave propagation direction. In accordance with the propagation velocities in the center areas of the first and second sections, the widths and propagation velocities in the edge areas of the first and second sections excite a piston mode.

Abstract translation: 弹性波装置包括设置在压电基板上的IDT。 IDT包括其中弹性波传播速度比电极指交叉区域的中心区域中的弹性波传播速度慢的边缘区域。 边缘区域在相交宽度方向上设置在中心区域的两侧。 IDT包括中心区域的传播速度相对较快的第一部分和中心区域的传播速度在弹性波传播方向上较慢的第二部分。 根据第一和第二部分的中心区域的传播速度，第一和第二部分的边缘区域中的宽度和传播速度激发活塞模式。

公开(公告)号：US09559661B2

公开(公告)日：2017-01-31

申请号：US14941324

申请日：2015-11-13

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Shogo Inoue ,  Masafumi Iwaki ,  Jun Tsutsumi

IPC: H03H9/70 ,  H03H9/54 ,  H03H9/64 ,  H03H9/72

CPC classification number: H03H9/54 ,  H03H9/6433 ,  H03H9/70 ,  H03H9/706 ,  H03H9/725

Abstract: A duplexer includes: a transmit filter that is connected between an antenna terminal and a transmit terminal and has a plurality of acoustic wave resonators; a receive filter that is connected between the antenna terminal and a receive terminal and has a plurality of acoustic wave resonators; and a delay line or a longitudinal coupling type resonator that is connected in parallel with at least one of the plurality of acoustic wave resonators of the transmit filter and the plurality of acoustic wave resonators of the receive filter and has at least two IDTs (Interdigital Transducers).

Abstract translation: 双工器包括：发射滤波器，其连接在天线端子和发射端子之间，并具有多个声波谐振器; 连接在天线端子和接收端子之间并具有多个声波谐振器的接收滤波器; 以及与发射滤波器的多个声波谐振器和接收滤波器的多个声波谐振器中的至少一个并联连接的延迟线或纵向耦合型谐振器，并且具有至少两个IDT（互指数转换器 ）。

公开(公告)号：US20160380614A1

公开(公告)日：2016-12-29

申请号：US14939751

申请日：2015-11-12

Applicant: RF Micro Devices, Inc.

Inventor： Benjamin P. Abbott ,  Yiliu Wang

IPC: H03H9/64 ,  H03H9/25

CPC classification number: H03H9/02818 ,  H03H9/14582 ,  H03H9/25 ,  H03H9/6433 ,  H03H9/6496

Abstract: A surface acoustic wave (SAW) resonator is provided with reduced rattling at frequencies lower than the resonance value. The SAW resonator includes an interdigital transducer (IDT) on a piezoelectric substrate. The IDT includes a first set of interdigital electrodes distributed between and parallel to the first end of theIDT and the second end of the IDT and a second set of interdigital electrodes interleaved with the first plurality of interdigital electrodes. A first resonant cavity is formed a predetermined distance from the first end of the IDT, and a second resonant cavity is formed a predetermined distance from the second end of the IDT. Additionally, a radio frequency (RF) filter is provided that includes multipleSAW resonators that include the resonant cavities formed a predetermined distance from the first and second ends of the IDT. This RF filter may provide increased bandwidth and reduced insertion loss.

Abstract translation: 包括谐振腔的SAW谐振器与IDT的第一和第二端形成预定的距离。 该RF滤波器可以提供增加的带宽和降低的插入损耗。

公开(公告)号：US20160142040A1

公开(公告)日：2016-05-19

申请号：US15002522

申请日：2016-01-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Junpei Yasuda

IPC: H03H9/54 ,  H03H9/64

CPC classification number: H03H9/0576 ,  H03H9/0009 ,  H03H9/02818 ,  H03H9/02834 ,  H03H9/08 ,  H03H9/1085 ,  H03H9/542 ,  H03H9/64 ,  H03H9/6433 ,  H03H9/6483 ,  H03H9/706 ,  H03H9/725

Abstract: An elastic wave filter includes a transmission circuit provided on a first main surface of a first piezoelectric substrate and a reception circuit provided on a second main surface of a second piezoelectric substrate. A mounting board on which the elastic wave filter is mounted includes a first ground electrode opposed to the transmission circuit; a first rear surface ground electrode overlapped with the transmission circuit in plan view of a rear surface; a second ground electrode opposed to the reception circuit; a second rear surface ground electrode overlapped with the reception circuit in plan view of the rear surface; a line electrode used for connection between the first ground electrode and the second ground electrode; and a first via electrode and a second via electrode passing through the mounting board. An amount of heat transfer per unit time of the second via electrode is greater than an amount of heat transfer per unit time of the first via electrode.

Abstract translation: 弹性波滤波器包括设置在第一压电基板的第一主表面上的传输电路和设置在第二压电基板的第二主表面上的接收电路。 安装有弹性波滤波器的安装板包括与传输电路相对的第一接地电极; 在后表面的平面图中与传输电路重叠的第一后表面接地电极; 与接收电路相对的第二接地电极; 在后表面的平面图中与接收电路重叠的第二后表面接地电极; 用于连接在第一接地电极和第二接地电极之间的线电极; 以及通过安装板的第一通孔电极和第二通孔电极。 第二通孔电极的每单位时间的热传递量大于第一通孔电极的每单位时间的热传递量。