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公开(公告)号：US20190238111A1
公开(公告)日：2019-08-01
申请号：US16214968
申请日：2018-12-10
发明人： Masafumi IWAKI , Yoshio SATOH
CPC分类号： H03H9/02818 , H01L41/0477 , H03H9/02559 , H03H9/02637 , H03H9/14541 , H03H9/25 , H03H9/6483 , H03H9/6489 , H03H9/725
摘要： An acoustic wave device includes: a Y-cut X-propagation lithium tantalate substrate having a cut angle of 5° or greater and 18° or less; and a grating electrode that is formed of one or more metal films stacked on the lithium tantalate substrate, a number of the one or more metal films being n (n is a natural number), excites an acoustic wave, and meets a condition: 0.16 λ ≤ ∑ i = 1 n ( hi × ρ i ρ 0 ) ≤ 0.24 λ where ρi represents a density of each metal film of the one or more metal films, hi represents a film thickness of the each metal film, ρ0 represents a density of Mo, and λ represents a pitch.
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公开(公告)号：US20180254765A1
公开(公告)日：2018-09-06
申请号：US15973562
申请日：2018-05-08
发明人： Kenji INATE
CPC分类号： H03H9/6496 , H01L41/0477 , H03H9/02559 , H03H9/02645 , H03H9/02685 , H03H9/02795 , H03H9/02818 , H03H9/14552 , H03H9/25 , H03H9/6483 , H03H9/725
摘要： An elastic wave device includes a piezoelectric substrate, a first elastic wave element on the piezoelectric substrate and including at least one first interdigital transducer electrode and a first reflector in an area of the first interdigital transducer electrode at one side in a propagation direction of elastic waves, and a second elastic wave element on the piezoelectric substrate and including at least one second interdigital transducer electrode and a second reflector in an area of the second interdigital transducer electrode at one side in the propagation direction of elastic waves. The first and second reflectors are disposed side by side in the propagation direction. A reflection member, between the first and second reflectors, reflects elastic waves in at least a direction different from the propagation direction.
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公开(公告)号：US20170222619A1
公开(公告)日：2017-08-03
申请号：US15488567
申请日：2017-04-17
发明人： Hideki IWAMOTO , Keiji OKADA , Yuichi TAKAMINE , Tsutomu TAKAI
CPC分类号： H03H9/02818 , H03H9/02992 , H03H9/14541 , H03H9/1457 , H03H9/54
摘要： An elastic wave device includes a low acoustic velocity film, a piezoelectric film, and an IDT electrode, which are laminated on a high acoustic velocity material. In the IDT electrode, first electrode fingers, or second electrode fingers, or each of the first electrode fingers and the second electrode fingers, includes a wide width portion with a dimension in a width direction larger than a dimension at a center in a length direction and being provided closer to at least one of a side of a proximal end and a side of a distal end than a central region, at least one of a first busbar and a second busbar includes cavities arranged in a busbar length direction, and at least one of the first busbar and the second busbar includes an inner busbar portion which is positioned closer to a side of the first electrode fingers or a side of the second electrode fingers than the cavities are and which extends in the length direction of the first busbar and the second busbar, a central busbar portion that includes the cavities, and an outer busbar portion.
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公开(公告)号：US20170063329A1
公开(公告)日：2017-03-02
申请号：US14835679
申请日：2015-08-25
CPC分类号： H03H9/02574 , H03H3/08 , H03H9/02818 , H03H9/02866 , H03H9/6483
摘要： A surface acoustic wave (SAW) resonator includes a piezoelectric layer disposed over a substrate, and a plurality of electrodes disposed over the first surface of the piezoelectric layer. A layer is disposed between the substrate and the piezoelectric layer. A surface of the layer has a smoothness sufficient to foster atomic bonding between layer and the piezoelectric layer. A plurality of features provided on a surface of the substrate reflects acoustic waves and reduce the incidence of spurious modes in the piezoelectric layer.
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公开(公告)号：US20170005638A1
公开(公告)日：2017-01-05
申请号：US15265912
申请日：2016-09-15
发明人： Masanori OTAGAWA , Syunsuke KIDO , Hideki IWAMOTO
CPC分类号： H03H9/6489 , H03H9/02574 , H03H9/02818 , H03H9/54 , H03H9/6483 , H03H9/725
摘要： A SAW filter device defines a filter including a high acoustic velocity member, a low acoustic velocity film, a piezoelectric film, and an IDT electrode are stacked in this order. A comb capacitive electrode electrically coupled to the filter is provided on the piezoelectric film. Where λc is a wavelength determined by an electrode finger pitch of the comb capacitive electrode, and, among modes of an elastic wave generated by the comb capacitive electrode, VC-(P+SV) is an acoustic velocity of a P+SV wave, VC-SH is an acoustic velocity of a SH wave, and VC-HO is an acoustic velocity of, out of higher-order modes of a SH wave, a higher-order mode at the lowest frequency side, VC-(P+SV) fF-H, or VC-SH/λC fF-H.
摘要翻译： 定义了包括高声速构件，低声速膜，压电膜和IDT电极的SAW滤波器装置。 电耦合到滤波器的梳状电容电极设置在压电膜上。 其中λc是由梳状电容电极的电极指间距决定的波长，并且在由梳状电容电极产生的弹性波的模式中，VC-（P + SV）是P + SV波的声速， VC-SH是SH波的声速，VC-HO是在SH波的高阶模式中在最低频率侧的高阶模式的声速，VC-（P + SV ）
fF-H或VC- SH /λC fF-H。 -
公开(公告)号：US20160285431A1
公开(公告)日：2016-09-29
申请号：US15079259
申请日：2016-03-24
发明人： Norihiko NAKAHASHI , Koji MIYAMOTO
IPC分类号： H03H9/64
CPC分类号： H03H9/6483 , H03H9/0009 , H03H9/02818 , H03H9/02866 , H03H9/14541
摘要： A ladder-type surface acoustic wave filter includes interdigital transducer electrodes disposed on a LiTaO3 piezoelectric substrate, and series resonators and parallel resonators defined by the interdigital transducer electrodes, and utilizes a leaky wave that propagates on the LiTaO3 piezoelectric substrate. A bandwidth ratio indicating a bandwidth of a passband of the ladder-type surface acoustic wave filter is about 2.5% or greater, and a cutoff frequency due to bulk wave radiation of one of the parallel resonators, is in a frequency range higher than the passband.
摘要翻译： 梯形声表面波滤波器包括设置在LiTaO 3压电基片上的叉指式换能器电极，以及由指数式换能器电极限定的串联谐振器和并联谐振器，并利用在LiTaO3压电基片上传播的泄漏波。 表示梯型声表面波滤波器的通带的带宽的带宽比约为2.5％以上，并且由并联谐振器中的一个的体波辐射导致的截止频率处于高于通带的频率范围 。
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公开(公告)号：US20150333731A1
公开(公告)日：2015-11-19
申请号：US14809994
申请日：2015-07-27
IPC分类号： H03H9/25
CPC分类号： H03H9/25 , H01L41/047 , H03H9/02818 , H03H9/02992
摘要： An elastic wave device includes an interdigital transducer (IDT) electrode in contact with a piezoelectric substrate having a bus bar electrode region including one of a first bus bar electrode and a second bus bar electrode of the IDT electrode, an alternately disposed region where first electrode fingers are alternately disposed with second electrode fingers of the IDT electrode, and an intermediate region including one of the first electrode fingers and the second electrode fingers. A dielectric film is formed in at least part of the intermediate region and in contact with an upper surface of the IDT electrode. The dielectric film includes a medium in which an acoustic velocity of a transverse wave propagating in the dielectric film is lower than an acoustic velocity of a main elastic wave of the alternately disposed region. The dielectric film is not formed in the alternately disposed region.
摘要翻译： 弹性波装置包括与具有包括IDT电极的第一汇流条电极和第二汇流条电极之一的汇流条电极区域的压电基板相接触的指数间换能器（IDT）电极，交替设置的区域，其中第一电极 手指交替地设置有IDT电极的第二电极指，以及包括第一电极指和第二电极指中的一个的中间区。 电介质膜形成在中间区域的至少一部分中并与IDT电极的上表面接触。 电介质膜包括其中在电介质膜中传播的横波的声速低于交替设置区域的主弹性波的声速的介质。 电介质膜不形成在交替设置的区域中。
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公开(公告)号：US20150270824A1
公开(公告)日：2015-09-24
申请号：US14434370
申请日：2013-11-06
申请人： EPCOS AG
发明人： Wolfgang Sauer , Thomas Kauschke , Thomas Bauer
CPC分类号： H03H9/02905 , H03H3/02 , H03H3/08 , H03H9/02559 , H03H9/02818 , H03H9/14541 , H03H9/25 , H03H9/725 , Y10T29/42
摘要： An electroacoustic component is specified in which the disturbing contributions of undesired wave modes are reduced. For this purpose, a component comprises includes a piezo layer, an electrode layer and a separating layer. A main mode and a secondary mode are capable of propagation in the component. The separating layer has an opposite thickness dependence for the frequencies of the main mode and of the secondary mode.
摘要翻译： 规定了一种电声分量，其中不期望的波模的干扰贡献减小。 为此，组件包括压电层，电极层和分离层。 主模式和次模式能够在组件中传播。 分离层对于主模式和次模式的频率具有相反的厚度依赖性。
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9.发明授权公开(公告)号：US08610517B2
公开(公告)日：2013-12-17
申请号：US12917738
申请日：2010-11-02
CPC分类号： H03H9/02818 , G01P15/0975 , H01L2224/48091 , H03H9/02228 , H03H9/02897 , H03H9/0585 , H03H9/1092 , H03H2009/0019 , H01L2924/00014
摘要： A device, comprising a substrate having opposing first and second surfaces, a first surface acoustic wave resonator disposed on the first surface of the substrate, a second surface acoustic wave resonator disposed on the second surface of the substrate, a first adhesive layer sandwiched between the first surface acoustic wave resonator and the substrate, and a second adhesive layer sandwiched between the second surface acoustic wave resonator.
摘要翻译： 一种器件，包括具有相对的第一和第二表面的衬底，设置在衬底的第一表面上的第一表面声波谐振器，设置在衬底的第二表面上的第二表面声波谐振器，夹在衬底的第二表面之间的第一粘合剂层 第一表面声波谐振器和基板，以及夹在第二声表面波谐振器之间的第二粘合层。
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公开(公告)号：US08525607B2
公开(公告)日：2013-09-03
申请号：US13474361
申请日：2012-05-17
申请人： Steven Fry , Wayne Bolton , John Esterline
发明人： Steven Fry , Wayne Bolton , John Esterline
CPC分类号： H03B5/32 , H01L41/08 , H03B5/04 , H03B5/30 , H03H9/02086 , H03H9/02433 , H03H9/02818 , H03H9/205 , H03L1/02 , H03L1/028
摘要： A crystal oscillator having a plurality of quartz crystals that are manufactured so that the directional orientation of the acceleration sensitivity vector is essentially the same for each crystal. This enables convenient mounting of the crystals to a circuit assembly with consistent alignment of the acceleration vectors. The crystals are aligned with the acceleration vectors in an essentially anti-parallel relationship and can be coupled to the oscillator circuit in either a series or parallel arrangement. Mounting the crystals in this manner substantially cancels the acceleration sensitivity of the composite resonator and oscillator, rendering it less sensitive to vibrational forces and shock events.
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