JP6993400B2 - 弾性表面波素子 - Google Patents
弾性表面波素子 Download PDFInfo
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- JP6993400B2 JP6993400B2 JP2019501269A JP2019501269A JP6993400B2 JP 6993400 B2 JP6993400 B2 JP 6993400B2 JP 2019501269 A JP2019501269 A JP 2019501269A JP 2019501269 A JP2019501269 A JP 2019501269A JP 6993400 B2 JP6993400 B2 JP 6993400B2
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- dielectric layer
- surface acoustic
- acoustic wave
- wave element
- substrate
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- 238000010897 surface acoustic wave method Methods 0.000 title claims description 54
- 239000000758 substrate Substances 0.000 claims description 43
- 239000013078 crystal Substances 0.000 claims description 10
- 229910013641 LiNbO 3 Inorganic materials 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 62
- 239000010408 film Substances 0.000 description 27
- 229910052751 metal Inorganic materials 0.000 description 24
- 239000002184 metal Substances 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000011241 protective layer Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000012447 hatching Effects 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910016570 AlCu Inorganic materials 0.000 description 1
- 229910003327 LiNbO3 Inorganic materials 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02543—Characteristics of substrate, e.g. cutting angles
- H03H9/02559—Characteristics of substrate, e.g. cutting angles of lithium niobate or lithium-tantalate substrates
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02614—Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves
- H03H9/02629—Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves of the edges
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14538—Formation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14538—Formation
- H03H9/14541—Multilayer finger or busbar electrode
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/25—Constructional features of resonators using surface acoustic waves
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Description
[1.1 弾性表面波素子の構造]
弾性表面波素子は、例えば、入力された高周波信号をフィルタリングして出力する弾性表面波フィルタを構成する素子として用いられる。
上記構成を有する弾性表面波素子10は、ラブ波を利用した弾性表面波素子である比較例に比べて、比帯域のばらつきを抑制することができる。この理解を容易にするために、比較例における弾性表面波素子の構成を説明する。
以上、本発明の実施の形態に係る弾性表面波素子について説明したが、本発明は、上記実施の形態に限定されるものではない。上記実施の形態における任意の構成要素を組み合わせて実現される別の実施の形態や、上記実施の形態に対して本発明の主旨を逸脱しない範囲で当業者が思いつく各種変形を施して得られる変形例や、本発明に係る弾性表面波素子を内蔵した各種フィルタおよび各種機器も本発明に含まれる。
101 基板
101a 主面
103 第2誘電体層
104 保護層
121 IDT電極
121a、121b 櫛形電極
122 第1誘電体層
211、212、213、214、215 金属膜
Claims (4)
- LiNbO3圧電単結晶を含む基板と、前記基板上に設けられた第1誘電体層と、前記第1誘電体層上に設けられたIDT電極と、前記IDT電極を覆うように前記第1誘電体層上に設けられた第2誘電体層とを備え、
前記第1誘電体層は、酸化ケイ素を含み、
前記LiNbO 3 圧電単結晶のYカット角は、100°以上160°以下であり、
前記IDT電極に高周波信号が入力された場合に前記基板にレイリー波を発生させることで、前記基板において前記高周波信号を伝搬する
弾性表面波素子。 - 前記第2誘電体層は、酸化ケイ素を含む
請求項1に記載の弾性表面波素子。 - 前記第1誘電体層は前記第2誘電体層よりも厚みが薄い
請求項1または2に記載の弾性表面波素子。 - 前記IDT電極に高周波信号が入力され、前記弾性表面波素子にて前記レイリー波を発生させた場合に、前記レイリー波の振動の最大振幅の発生位置が、前記第2誘電体層内に存在する
請求項1~3のいずれか1項に記載の弾性表面波素子。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017031360 | 2017-02-22 | ||
JP2017031360 | 2017-02-22 | ||
PCT/JP2018/005286 WO2018155305A1 (ja) | 2017-02-22 | 2018-02-15 | 弾性表面波素子 |
Publications (2)
Publication Number | Publication Date |
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JPWO2018155305A1 JPWO2018155305A1 (ja) | 2019-11-07 |
JP6993400B2 true JP6993400B2 (ja) | 2022-01-13 |
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JP2019501269A Active JP6993400B2 (ja) | 2017-02-22 | 2018-02-15 | 弾性表面波素子 |
Country Status (5)
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US (1) | US11863155B2 (ja) |
JP (1) | JP6993400B2 (ja) |
KR (1) | KR102304886B1 (ja) |
CN (1) | CN110313130B (ja) |
WO (1) | WO2018155305A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016117483A1 (ja) * | 2015-01-22 | 2016-07-28 | 株式会社村田製作所 | 弾性波装置の製造方法、および弾性波装置 |
DE102019124861A1 (de) * | 2019-09-16 | 2021-03-18 | RF360 Europe GmbH | Filterchip und SAW-Resonator erster Art |
WO2021079830A1 (ja) * | 2019-10-24 | 2021-04-29 | 京セラ株式会社 | 弾性波装置 |
WO2022044869A1 (ja) * | 2020-08-27 | 2022-03-03 | 株式会社村田製作所 | 弾性波装置 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS529389A (en) * | 1975-07-14 | 1977-01-24 | Toshiba Corp | Surface acoustic wave device |
DE2631671A1 (de) * | 1975-07-14 | 1977-02-03 | Tokyo Shibaura Electric Co | Vorrichtung fuer elastische oberflaechenwellen |
JPS59156013A (ja) * | 1983-02-25 | 1984-09-05 | Hiroshi Shimizu | 高結合弾性表面波圧電基板 |
JP3894917B2 (ja) * | 2003-11-12 | 2007-03-22 | 富士通メディアデバイス株式会社 | 弾性境界波デバイス及びその製造方法 |
US7795788B2 (en) * | 2004-10-26 | 2010-09-14 | Kyocera Corporation | Surface acoustic wave element and communication device |
JP2008067289A (ja) | 2006-09-11 | 2008-03-21 | Fujitsu Media Device Kk | 弾性波デバイスおよびフィルタ |
JP2008078739A (ja) | 2006-09-19 | 2008-04-03 | Fujitsu Media Device Kk | 弾性波デバイスおよびフィルタ |
DE112011104653B4 (de) * | 2010-12-29 | 2016-07-21 | Murata Manufacturing Co., Ltd. | Oberflächenschallwellen-Bauelement |
JP5766457B2 (ja) * | 2011-02-09 | 2015-08-19 | 太陽誘電株式会社 | 弾性波デバイス及びその製造方法 |
DE102011011377B4 (de) * | 2011-02-16 | 2016-05-25 | Epcos Ag | Mit akustischen Wellen arbeitendes Bauelement |
JP5182459B2 (ja) * | 2011-06-23 | 2013-04-17 | パナソニック株式会社 | ラダー型弾性波フィルタ及びこれを用いたアンテナ共用器 |
JP6198536B2 (ja) * | 2013-09-11 | 2017-09-20 | スカイワークスフィルターソリューションズジャパン株式会社 | 弾性波素子とこれを用いた電子機器 |
US9496846B2 (en) * | 2013-02-15 | 2016-11-15 | Skyworks Filter Solutions Japan Co., Ltd. | Acoustic wave device and electronic apparatus including same |
DE102014105860A1 (de) * | 2014-04-25 | 2015-10-29 | Epcos Ag | Elektroakustisches Bauelement und Kristallschnitte für elektroakustische Bauelemente |
WO2015191719A1 (en) * | 2014-06-10 | 2015-12-17 | Massachusetts Institute Of Technology | Unreleased coupled mems resonators and transmission filters |
US20170155373A1 (en) * | 2015-11-30 | 2017-06-01 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Surface acoustic wave (saw) resonator structure with dielectric material below electrode fingers |
-
2018
- 2018-02-15 CN CN201880012879.8A patent/CN110313130B/zh active Active
- 2018-02-15 KR KR1020197021875A patent/KR102304886B1/ko active IP Right Grant
- 2018-02-15 WO PCT/JP2018/005286 patent/WO2018155305A1/ja active Application Filing
- 2018-02-15 JP JP2019501269A patent/JP6993400B2/ja active Active
-
2019
- 2019-08-14 US US16/540,096 patent/US11863155B2/en active Active
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Publication number | Publication date |
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US11863155B2 (en) | 2024-01-02 |
WO2018155305A1 (ja) | 2018-08-30 |
KR102304886B1 (ko) | 2021-09-24 |
CN110313130A (zh) | 2019-10-08 |
JPWO2018155305A1 (ja) | 2019-11-07 |
CN110313130B (zh) | 2023-02-28 |
US20190372551A1 (en) | 2019-12-05 |
KR20190096425A (ko) | 2019-08-19 |
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