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公开(公告)号：US11722121B2
公开(公告)日：2023-08-08
申请号：US16485759
申请日：2018-02-14
申请人： KYOCERA Corporation
发明人： Tetsuya Kishino , Motoki Ito
CPC分类号： H03H9/25 , H03H9/02559 , H03H9/14541
摘要： An acoustic wave element includes an IDT electrode including electrode fingers, a first substrate on an upper surface of which the IDT electrode is located, which has a thickness of less than 2 times a repetition interval of the electrode fingers and is configured by a piezoelectric crystal, a second substrate bonded to a lower surface of the first substrate, and configured by an Si single crystal having a plane orientation of a (100) plane or (110) plane or a plane equal to them, in which substrate a crystal axis of the Si single crystal parallel to a substrate surface of Si single crystal is inclined at any angle of 25° to 65°, 115° to 155°, 205° to 245°, and 295° to 345° relative to a direction of propagation of an acoustic wave when viewed from the upper surface of the superposed first substrate.
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公开(公告)号：US11689182B2
公开(公告)日：2023-06-27
申请号：US16628568
申请日：2018-07-05
申请人： KYOCERA Corporation
发明人： Naofumi Kasamatsu , Masahisa Shimozono , Tetsuya Kishino , Masaki Nanbu , Hongnian Li , Tatsuya Doumoto
CPC分类号： H03H9/14541 , H03H9/02559 , H03H9/14502 , H03H9/25 , H03H9/6483
摘要： An acoustic wave element 1 according to the present disclosure includes a piezoelectric substrate 2 and an IDT electrode 3 on the piezoelectric substrate 2. The IDT electrode 3 includes a multilayer structure of a first layer 35 comprised of Al containing 10% or less of a sub-component and a second layer 37 comprised of a CuAl2 alloy. The second layer 37 enables the acoustic wave element 1 to have excellent electric power resistance.
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公开(公告)号：US11362639B2
公开(公告)日：2022-06-14
申请号：US16629900
申请日：2018-07-27
申请人： KYOCERA Corporation
发明人： Motoki Ito , Tetsuya Kishino
摘要： An acoustic wave device includes a substrate 3, a multilayer film 5 on the substrate 3, an LT layer 7 which is located on the multilayer film and is configured by a single crystal of LiTaO3, and an IDT electrode 19 on the LT layer 7. In the multilayer film 7, a differential value D obtained by subtracting a total value of values each obtained by multiplying a density and thickness of a film having a slower acoustic velocity than a transverse wave acoustic velocity of the LT layer 7 from a total value of values each obtained by multiplying a density and thickness of a film having a faster acoustic velocity than the transverse wave acoustic velocity of the LT layer 7 is negative, and a thickness of the LT layer 7 is less than 2p where a pitch of electrode fingers in the IDT electrode 19 is “p”.
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公开(公告)号：US11626857B2
公开(公告)日：2023-04-11
申请号：US16631744
申请日：2018-07-23
申请人： KYOCERA Corporation
发明人： Soichiro Nozoe , Tetsuya Kishino
摘要： An acoustic wave element includes an IDT electrode including a plurality of electrode fingers and exciting a surface acoustic wave, a first substrate including an upper surface on which the IDT electrode is located, the first substrate being configured by a piezoelectric crystal, and a second substrate bonded to a side where a lower surface of the first substrate is located. Either of a first region which continues from the lower surface of the first substrate toward a side where the upper surface is located or a second region which continues from the lower surface of the first substrate toward a side where the second substrate is located is a low resistance region having a resistance value of 5×103Ω to 5×107Ω.
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公开(公告)号：US10998880B2
公开(公告)日：2021-05-04
申请号：US16089684
申请日：2017-03-29
申请人： KYOCERA Corporation
发明人： Tetsuya Kishino , Tsuyoshi Nakai
摘要： An acoustic wave element includes an IDT electrode includes pluralities of electrode fingers, and reflector electrodes on the two sides of the IDT electrode. The IDT electrode includes a major part and at least one end part which is located between the major part and one of the reflector electrodes and is arranged along a direction of propagation of an acoustic wave together with the major part. the at least one end part includes a pitch of the plurality of electrode fingers substantially the same as a pitch of the plurality of electrode fingers in the major part, is electrically connected in parallel with respect to the major part, and is divided into two or more sections which are electrically connected in series with each other.
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公开(公告)号：US10389391B2
公开(公告)日：2019-08-20
申请号：US16072585
申请日：2017-01-27
申请人： KYOCERA Corporation
发明人： Motoki Ito , Tetsuya Kishino , Tsuyoshi Nakai
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.
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公开(公告)号：US10833649B2
公开(公告)日：2020-11-10
申请号：US16096200
申请日：2017-04-26
申请人： KYOCERA Corporation
发明人： Masaya Kawaguchi , Tetsuya Kishino
摘要： In an IDT electrode of an acoustic wave element which includes first electrode fingers and second electrode fingers connected to potentials which are different from each other and arranged spaced apart from each other, the first electrode fingers includes first tip parts, and either of the first electrode fingers and the second electrode fingers includes, at a tip area extending along a direction of propagation of an acoustic wave and overlapping with the first tip parts, increase sections in which electrode volumes per unit lengths in a direction of extension of the first electrode fingers and the second electrode fingers are larger in comparison with that of the center area in which the electrode fingers intersect.
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公开(公告)号：US09912319B2
公开(公告)日：2018-03-06
申请号：US14896334
申请日：2014-03-27
申请人： KYOCERA Corporation
CPC分类号： H03H9/76 , H03H9/0038 , H03H9/02755 , H03H9/542 , H03H9/6406 , H03H9/6483 , H03H9/6489 , H03H9/725 , H04B7/24 , H04L5/14
摘要： A branching 1 filter has an antenna terminal 3 which receives signal waves and disturbance waves, a transmission filter 11 which is connected to the antenna terminal 3, a reception filter 13 which is connected to the antenna terminal 3 and receives a portion of the signal waves and has, as a passband, a frequency range higher than a passband of the transmission filter 11, and a disturbance wave resonator which is connected to the antenna terminal 3 and to the ground and positioned closer to the antenna terminal 3 side than the transmission filter 11 and the reception filter 13. The disturbance wave resonator 15 is connected to antenna terminal 3 at a position closer to the antenna terminal 3 side than the transmission filter 11 and the reception filter 13. A resonance frequency of the disturbance wave resonator 15 is within a frequency range smaller than the passband of the transmission filter and includes a frequency range of the disturbance waves.
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公开(公告)号：US11336254B2
公开(公告)日：2022-05-17
申请号：US16305646
申请日：2017-05-30
申请人： KYOCERA Corporation
发明人： Daisuke Yamamoto , Tetsuya Kishino
摘要： A composite substrate 10 includes a first substrate 10 comprised of a piezoelectric single crystal and a second substrate 20 comprised of a silicon single crystal bonded to the first substrate 10. In the second substrate, a planar orientation is (111), and ψ of Euler angles (φ, θ, ψ) is offset from 0°. Due to this, a bulk wave spurious is reduced in a specific frequency band.
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公开(公告)号：US10333487B2
公开(公告)日：2019-06-25
申请号：US15500474
申请日：2015-07-30
申请人： KYOCERA CORPORATION
发明人： Tetsuya Kishino
摘要： An acoustic wave element of the present invention includes a piezoelectric substrate, an excitation electrode which is arranged on the piezoelectric substrate and includes a plurality of electrode fingers, and two reflectors arranged on the piezoelectric substrate, each of which includes a plurality of reflection electrode fingers, which sandwich the excitation electrode therebetween in the propagation direction of an acoustic wave. The excitation electrode includes a main region in the center vicinity of the line of the plurality of electrode fingers in which the intervals between the centers of the plurality of electrode fingers are uniformly a first interval. In the reflector, at least one of the reflection electrode fingers shifts to the excitation electrode side relative to virtual electrode finger positions which are repeatedly set at the first intervals from the electrode fingers in the main region.
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