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1. 发明申请

US20190036554A1 ACOUSTIC WAVE RESONATOR, ACOUSTIC WAVE FILTER, MULTIPLEXER, AND COMMUNICATION APPARATUS 审中-公开
公开(公告)号：US20190036554A1
公开(公告)日：2019-01-31
申请号：US16072585
申请日：2017-01-27
申请人： KYOCERA Corporation
发明人： Motoki ITO , Tetsuya KISHINO , Tsuyoshi NAKAI
IPC分类号： H04B1/00 , H03H9/02 , H03H9/145 , H03H9/25 , H03H9/64 , H03H9/72
CPC分类号： H04B1/0057 , H03H9/02559 , H03H9/02637 , H03H9/02685 , H03H9/02929 , H03H9/14582 , H03H9/25 , H03H9/6483 , H03H9/725
摘要： An SAW resonator includes a piezoelectric substrate, an IDT electrode, and a pair of reflectors. The IDT electrode includes pluralities of electrode fingers which are aligned on the piezoelectric substrate in a direction of propagation of a SAW. The pair of reflectors are located on the two sides of the pluralities of electrode fingers on the piezoelectric substrate in the direction of propagation. The IDT electrode includes a plurality of areas which includes pluralities of electrode fingers distributed to them and have different resonance frequencies from each other. The plurality of areas include at least three areas. The second highest resonance frequency among all areas is lower than an intermediate value between the lowest resonance frequency among all areas and the highest resonance frequency among all areas.

2. 发明申请

US20180212586A1 ELASTIC WAVE DEVICE 审中-公开
公开(公告)号：US20180212586A1
公开(公告)日：2018-07-26
申请号：US15924311
申请日：2018-03-19
申请人： Murata Manufacturing Co., Ltd.
发明人： Masakazu MIMURA
IPC分类号： H03H9/02 , H03H9/10 , H03H9/145 , H03H9/25
CPC分类号： H03H9/02889 , H01L41/0477 , H03H3/10 , H03H9/02559 , H03H9/02637 , H03H9/1092 , H03H9/145 , H03H9/14541 , H03H9/25
摘要： An elastic wave device includes an interdigital transducer electrode, a dielectric film, and a frequency adjustment film are disposed on a LiNbO3 substrate. When Euler Angles of the LiNbO3 substrate are within a range of about 0°±5°, within a range of about θ±1.5°, within a range of about 0°±10°, the interdigital transducer electrode includes a main electrode, a film thickness of the main electrode normalized by a wavelength determined in accordance with an electrode finger pitch of the interdigital transducer electrode is denoted as T, and a density ratio of a material of the main electrode to Pt is denoted as r, the film thickness of the main electrode and θ of the Euler Angles satisfy θ=−0.05°/(T/r−0.04)+31.35°.

3. 发明申请

US20180205362A1 ELASTIC WAVE DEVICE 审中-公开
公开(公告)号：US20180205362A1
公开(公告)日：2018-07-19
申请号：US15922961
申请日：2018-03-16
申请人： Murata Manufacturing Co., Ltd.
发明人： Yutaka KISHIMOTO , Masashi OMURA , Tetsuya KIMURA
IPC分类号： H03H9/02 , H03H9/05 , H03H9/145 , H03H9/25 , H03H3/08
CPC分类号： H03H9/02929 , H01L41/0477 , H01L41/29 , H01L41/312 , H03H3/02 , H03H3/08 , H03H9/02228 , H03H9/02559 , H03H9/02637 , H03H9/0561 , H03H9/058 , H03H9/145 , H03H9/175 , H03H9/25 , H03H2003/025
摘要： An elastic wave device includes a supporting substrate, an acoustic multilayer film on the supporting substrate, a piezoelectric substrate on the acoustic multilayer film, and an IDT electrode on the piezoelectric substrate. The acoustic multilayer film includes at least four acoustic impedance layers. The at least four acoustic impedance layers include at least one low acoustic impedance layer and at least one high acoustic impedance layer having an acoustic impedance higher than the low acoustic impedance layer. The elastic wave device further includes a bonding layer provided at any position in a range of from inside the acoustic impedance layer, which is the fourth acoustic impedance layer from the piezoelectric substrate side towards the supporting substrate side, to an interface between the acoustic multilayer film and the supporting substrate.

4. 发明申请

US20170373667A1 ELASTIC WAVE DEVICE 审中-公开
公开(公告)号：US20170373667A1
公开(公告)日：2017-12-28
申请号：US15617061
申请日：2017-06-08
申请人： Murata Manufacturing Co., Ltd.
发明人： Tomohiko MURASE
IPC分类号： H03H9/64 , H03H9/05 , H01L41/187 , H03H9/02 , H03H9/25 , H03H9/145
CPC分类号： H03H9/64 , H01L41/1873 , H03H9/02637 , H03H9/02992 , H03H9/059 , H03H9/1071 , H03H9/14541 , H03H9/25
摘要： An elastic wave device includes a piezoelectric substrate, IDT electrodes disposed on the piezoelectric substrate, a first wiring line, an insulating layer covering at least a portion of the first wiring line, a second wiring line at least a portion of which is disposed on the insulating layer to provide a three-dimensional crossing portion, a peripheral support including a cavity surrounding the IDT electrodes, the first and second wiring lines, and the insulating layer, a partition support disposed in the cavity, and a cover disposed on the peripheral support and the partition support to cover the cavity. The second wiring line includes a step portion electrically connecting a portion of the second wiring line located on the piezoelectric substrate and a portion of the second wiring line located on the insulating layer to each other. The partition support covers the step portion.

5. 发明申请

US20170359048A1 MULTIPLEXER AND RADIO-FREQUENCY (RF) FRONT-END MODULE 审中-公开
公开(公告)号：US20170359048A1
公开(公告)日：2017-12-14
申请号：US15599506
申请日：2017-05-19
申请人： Murata Manufacturing Co., Ltd.
发明人： Junpei YASUDA
IPC分类号： H03H9/02 , H03H9/25 , H03H9/64
CPC分类号： H03H9/02637 , H03H9/02992 , H03H9/145 , H03H9/25 , H03H9/6436 , H03H9/6483 , H03H9/725
摘要： A multiplexer includes a first filter disposed between an antenna common terminal and a first terminal, and a second filter that is disposed between the antenna common terminal and a second terminal and that has higher passband frequencies than the first filter. The second filter includes IDTs that are longitudinally coupled. Among IDT electrodes in the IDTs, first IDT electrodes are connected to the antenna common terminal side, and second IDT electrodes are connected to the second terminal side. The first and second IDT electrodes have different main pitches of the electrode fingers. At least one of the second IDT electrodes out of all of the electrode fingers has a maximum main pitch.

6. 发明申请

US20140049340A1 ACOUSTIC WAVE FILTER, DUPLEXER, AND MODULE 有权
标题翻译：声波滤波器，双工器和模块
公开(公告)号：US20140049340A1
公开(公告)日：2014-02-20
申请号：US13950600
申请日：2013-07-25
申请人： TAIYO YUDEN CO., LTD.
发明人： Shogo INOUE
IPC分类号： H03H9/72 , H03H9/64
CPC分类号： H03H9/25 , H03H9/02637 , H03H9/14538 , H03H9/6483 , H03H9/725
摘要： An acoustic wave filter includes: at least a parallel resonator, wherein at least one of the parallel resonator includes a piezoelectric substance, an IDT located on the piezoelectric substance, and reflectors located on the piezoelectric substance so as to sandwich the IDT, and a distance between a first electrode finger that is an electrode finger closest to the reflector among electrode fingers of the IDT and a second electrode finger that is an electrode finger closest to the IDT among electrode fingers of the reflector is less than 0.25(λIDT+λref) where a period of the electrode fingers of the IDT is λIDT and a period of the electrode fingers of the reflector is λref.
摘要翻译：声波滤波器包括：至少一个并联谐振器，其中并联谐振器中的至少一个包括压电体，位于压电体上的IDT和位于压电体上的反射器，以夹持IDT，在IDT的电极指中最靠近反射器的电极指的第一电极指和作为反射器的电极指中最靠近IDT的电极指的第二电极指小于0.25（λIDT+ lambdaref），其中 IDT的电极指的周期是λIDT，并且反射器的电极指的周期是lambdaref。

7. 发明授权

US08049583B2 Acoustic wave filter comprising a reflector having an oblique slit 失效
标题翻译：声波滤波器，包括具有倾斜狭缝的反射器
公开(公告)号：US08049583B2
公开(公告)日：2011-11-01
申请号：US12397719
申请日：2009-03-04
申请人： Kouta Ohkubo , Yasufumi Kaneda
发明人： Kouta Ohkubo , Yasufumi Kaneda
IPC分类号： H03H9/64 , H03H9/25
CPC分类号： H03H9/02637 , H03H9/0057 , H03H9/6473 , H03H9/6476
摘要： An acoustic wave filter includes a piezoelectric substrate, an IDT (interdigital transducer) formed on the piezoelectric substrate, and reflectors located at both sides of the IDT and composed of electrode fingers, at least one of the electrode fingers of at least one of the reflectors including at least one gap within a propagation path of an acoustic wave.
摘要翻译：声波滤波器包括压电基片，形成在压电基片上的IDT（叉指式换能器）和位于IDT两侧并由电极指构成的反射器，至少一个反射器的电极指中的至少一个包括在声波的传播路径内的至少一个间隙。

8. 发明申请

US20040169569A1 Weighted SAW reflector grating using dithered acoustic reflectors 失效
标题翻译：使用抖动声反射器的加权SAW反射器光栅
公开(公告)号：US20040169569A1
公开(公告)日：2004-09-02
申请号：US10377333
申请日：2003-02-28
发明人： David S. Yip
IPC分类号： H03H009/64
CPC分类号： H03H9/02685 , H03H9/02637
摘要： A reflective grating (36) for a SAW filter (10) or resonator. The reflective grating (36) is formed by selectively dithering grating grid lines (38) with respect to a uniform spaced grid of M number of grid lines (38) per each N wavelength (null) of the grating (36) (Nnull/M), where null is the wavelength of the center of the frequency band of interest, M and N are integers and M>N. M and N are selected so that the grating (36) does not have a net reflection when all of the grid lines (38) are uniformly spaced. By controlling the dithering pattern of the grid line in each sampling period of Nnull, any desired net distributed reflectivity from the grating can be implemented in both magnitude and phase.
摘要翻译：用于SAW滤波器（10）或谐振器的反射光栅（36）。反射光栅（36）通过相对于格栅（36）的每个N波长（λ）的M个格网线（38）的均匀隔开的网格选择性地抖动光栅格线（38）（Nλ/ M ），其中λ是感兴趣频带的中心的波长，M和N是整数，M> N。选择M和N，使得当所有格栅线（38）均匀间隔时，光栅（36）不具有净反射。通过控制Nlambda的每个采样周期中网格线的抖动模式，可以在幅度和相位两者中实现来自光栅的任何期望的净分布反射率。

9. 发明授权

US5831494A Dual track low-loss reflective saw filter 失效
标题翻译：双轨低损耗反射锯式过滤器
公开(公告)号：US5831494A
公开(公告)日：1998-11-03
申请号：US766480
申请日：1996-12-12
申请人： Leland P. Solie
发明人： Leland P. Solie
IPC分类号： H03H9/145 , H03H9/64
CPC分类号： H03H9/02842 , H03H9/14547 , H03H9/14558 , H03H9/6443 , H03H9/02637
摘要： A dual track, low signal loss surface acoustic wave filter includes tapered transducers and tapered reflectors within an axis of propagation for each track to achieve an improved pass band response associated with tapered transducers. The bandwidth of the filter is achieved by adjusting the taper of periodicity normal to the propagation axis. Each track includes reflector gratings mounted on the filter substrate for reflecting a surface acoustic wave propagating from a transducer mounted within each track back to the transducer. Input and output transducers are positioned between the reflectors within each track for providing a direct surface acoustic wave propagation path within the track between the transducers. Alternate parallel tracks have the reflector with an input transducer, and a reflector with an output transducers mounted in an offset alignment with a corresponding adjacent track reflector and transducer for constructively adding surface acoustic wave signals detected within the adjacent track. Both the reflectors and transducers within each track include a similar set of electrode fingers mounted on the substrate generally transverse to the longitudinal propagation axis. In addition, each finger set has adjacent fingers positioned such that a spacing between the adjacent fingers continuously increases or decreases monotonically from point to point transversely to the propagation axis, along the fingers, and the spacing between adjacent fingers along lines parallel to the axis of propagation are substantially equal.
摘要翻译：双轨，低信号损耗表面声波滤波器包括用于每个轨道的传播轴内的锥形换能器和锥形反射器，以实现与锥形换能器相关联的改进的通带响应。滤波器的带宽通过调整垂直于传播轴的周期的锥度来实现。每个轨道包括安装在过滤器基板上的反射器光栅，用于反射从安装在每个轨道内的换能器传播到传感器的表面声波。输入和输出换能器位于每个轨道内的反射器之间，以在换能器之间的轨道内提供直接的表面声波传播路径。替代的平行轨道具有带有输入换能器的反射器，以及具有输出换能器的反射器，其安装成与相应的相邻轨道反射器和换能器的偏移对准，用于建构性地添加在相邻轨道内检测到的表面声波信号。每个轨道内的反射器和换能器都包括安装在基底上的类似的一组电极指，大致横向于纵向传播轴线。此外，每个手指组具有相邻的手指定位成使得相邻手指之间的间隔沿着手指从横向于传播轴线的点到点单向连续地增加或减小，并且相邻手指之间的间隔沿着平行于传播基本相等。

10. 发明授权

US5406159A Surface acoustic wave gratings having selected reflectivity 失效
标题翻译：具有选择的反射率的表面声波光栅
公开(公告)号：US5406159A
公开(公告)日：1995-04-11
申请号：US152179
申请日：1993-11-11
申请人： Peter V. Wright
发明人： Peter V. Wright
IPC分类号： H03H9/02 , H01L41/08
CPC分类号： H03H9/02803 , H03H9/02637
摘要： An improved surface acoustic wave grating structure that utilizes four electrodes per 3.lambda./2 or 5.lambda./2 transduction length of a reflector grating structure that produces a desired net internal distributed reflectivity in both magnitude and phase.
摘要翻译：改进的表面声波光栅结构，其利用反射器光栅结构的每3λ/ 2或5λ/ 2转导长度的四个电极，其在幅度和相位上产生期望的净内部分布反射率。

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