JP6515042B2 - 弾性波デバイス - Google Patents
弾性波デバイス Download PDFInfo
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- JP6515042B2 JP6515042B2 JP2016011698A JP2016011698A JP6515042B2 JP 6515042 B2 JP6515042 B2 JP 6515042B2 JP 2016011698 A JP2016011698 A JP 2016011698A JP 2016011698 A JP2016011698 A JP 2016011698A JP 6515042 B2 JP6515042 B2 JP 6515042B2
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- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 3
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- 229910052707 ruthenium Inorganic materials 0.000 description 3
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- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
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- 239000010703 silicon Substances 0.000 description 1
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- 239000010937 tungsten Substances 0.000 description 1
- 239000011787 zinc oxide Substances 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
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/205—Constructional features of resonators consisting of piezoelectric or electrostrictive material having multiple resonators
-
- 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
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02086—Means for compensation or elimination of undesirable effects
- H03H9/02125—Means for compensation or elimination of undesirable effects of parasitic elements
-
- 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
- H03H9/13—Driving means, e.g. electrodes, coils for networks consisting of piezoelectric or electrostrictive materials
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/171—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator implemented with thin-film techniques, i.e. of the film bulk acoustic resonator [FBAR] type
- H03H9/172—Means for mounting on a substrate, i.e. means constituting the material interface confining the waves to a volume
- H03H9/173—Air-gaps
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/171—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator implemented with thin-film techniques, i.e. of the film bulk acoustic resonator [FBAR] type
- H03H9/172—Means for mounting on a substrate, i.e. means constituting the material interface confining the waves to a volume
- H03H9/175—Acoustic mirrors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/54—Filters comprising resonators of piezo-electric or electrostrictive material
- H03H9/58—Multiple crystal filters
- H03H9/60—Electric coupling means therefor
- H03H9/605—Electric coupling means therefor consisting of a ladder configuration
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/70—Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
- H03H9/703—Networks using bulk acoustic wave devices
- H03H9/706—Duplexers
Description
前記アンテナ端子と受信端子との間に接続された受信フィルタと、を備えるデュプレクサであって、前記送信フィルタ及び前記受信フィルタの少なくとも一方は、前記第1共振器と前記第2共振器を備えるラダー型フィルタである構成とすることができる。
第1の条件:第1共振器P3aの共振周波数は分割前の並列共振器P3と同じで、第2共振器P3bの共振周波数は第1共振器P3aよりも0.33MHz小さくした。第1共振器P3a及び第2共振器P3bの容量値は分割前の並列共振器P3の2倍とした。
第2の条件:第1共振器P3aと第2共振器P3bの共振周波数は分割前の並列共振器P3と同じとした。第1共振器P3aの容量値は分割前の並列共振器P3と同じで、第2共振器P3bの容量値は第1共振器P3aの0.975倍とした。
20 第2共振器
30 基板
32 下部電極
34 圧電体
36 上部電極
38 質量負荷膜
42、42a 空隙
44 共振領域
46 島状パターン
48 開口パターン
52 領域
54 音響反射膜
56 音響インピーダンスの低い膜
58 音響インピーダンスの高い膜
60 インダクタ
62 送信フィルタ
64 受信フィルタ
100〜400 弾性波デバイス
500 ラダー型フィルタ
600 デュプレクサ
Claims (4)
- 通過帯域の信号が入力される入力端子と前記信号が出力される出力端子との間に複数の共振器が接続されたフィルタを有する弾性波デバイスであって、
前記複数の共振器の少なくとも1つは、
第1圧電体と、前記第1圧電体のc軸又は分極軸の方向で前記第1圧電体を挟んだ第1下部電極及び第1上部電極と、を含む第1共振器と、
前記入力端子と前記第1共振器との間に前記第1共振器に直列に接続され、第2圧電体と、前記第1共振器と前記c軸又は分極軸の同じ方向で電気的に接続される電極が同電位となるように前記第2圧電体を挟んだ第2下部電極及び第2上部電極と、を含み、前記第1共振器よりも低い反共振周波数を有する第2共振器と、を備え、
前記第2共振器の電気機械結合係数は前記第1共振器よりも小さく、
前記第1共振器は、空隙又は音響反射膜上で前記第1圧電体を挟んで前記第1下部電極と前記第1上部電極とが対向する領域であり、前記第2共振器は、空隙又は音響反射膜上で前記第2圧電体を挟んで前記第2下部電極と前記第2上部電極とが対向する領域である共振領域を有し、
前記第1共振器の前記共振領域の面積と前記第2共振器の前記共振領域の面積とは同じ大きさであり、
前記第2共振器の前記共振領域以外で前記第2圧電体を挟んで第2下部電極と前記第2上部電極とが対向する領域の面積は、前記第1共振器の前記共振領域以外で前記第1圧電体を挟んで前記第1下部電極と前記第1上部電極とが対向する領域の面積よりも大きい、弾性波デバイス。 - 前記入力端子と前記出力端子との間の経路に一端が接続し他端がグランドに接続して設けられた1又は複数の並列共振器のうちの最も前記出力端子側に位置する並列共振器は、前記第1共振器と前記第2共振器に分割されている、請求項1記載の弾性波デバイス。
- アンテナ端子と送信端子の間に接続された送信フィルタと、
前記アンテナ端子と受信端子との間に接続された受信フィルタと、を備えるデュプレクサであって、
前記送信フィルタ及び前記受信フィルタの少なくとも一方は、前記第1共振器と前記第2共振器を備えるラダー型フィルタである、請求項1または2記載の弾性波デバイス。 - 前記送信フィルタはラダー型フィルタであって、
前記送信フィルタを構成する1又は複数の並列共振器のうちの最も前記アンテナ端子側に位置する並列共振器は、前記第1共振器と前記第2共振器に分割されている、請求項3記載の弾性波デバイス。
Priority Applications (2)
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JP2016011698A JP6515042B2 (ja) | 2016-01-25 | 2016-01-25 | 弾性波デバイス |
US15/409,881 US11038486B2 (en) | 2016-01-25 | 2017-01-19 | Acoustic wave device |
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JP2016011698A JP6515042B2 (ja) | 2016-01-25 | 2016-01-25 | 弾性波デバイス |
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JP2017135463A JP2017135463A (ja) | 2017-08-03 |
JP6515042B2 true JP6515042B2 (ja) | 2019-05-15 |
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Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7017364B2 (ja) | 2017-10-18 | 2022-02-08 | 太陽誘電株式会社 | ラダー型フィルタ、圧電薄膜共振器およびその製造方法 |
JP7037336B2 (ja) * | 2017-11-16 | 2022-03-16 | 太陽誘電株式会社 | 弾性波デバイスおよびその製造方法、フィルタ並びにマルチプレクサ |
KR20200030478A (ko) | 2018-09-12 | 2020-03-20 | 스카이워크스 글로벌 피티이. 엘티디. | 벌크 음향파 공진기를 위한 리세스 프레임 구조체 |
KR102139768B1 (ko) * | 2018-10-12 | 2020-07-31 | 삼성전기주식회사 | 체적 음향 공진기를 포함하는 필터 |
SG10202004451PA (en) | 2019-05-23 | 2020-12-30 | Skyworks Global Pte Ltd | Film bulk acoustic resonator including recessed frame with scattering sides |
US11601112B2 (en) * | 2019-05-24 | 2023-03-07 | Skyworks Global Pte. Ltd. | Bulk acoustic wave/film bulk acoustic wave resonator and filter for wide bandwidth applications |
US11601113B2 (en) | 2019-05-24 | 2023-03-07 | Skyworks Global Pte. Ltd. | Bulk acoustic wave/film bulk acoustic wave resonator and filter for wide bandwidth applications |
Family Cites Families (13)
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JP2000261281A (ja) * | 1999-03-09 | 2000-09-22 | Tdk Corp | 圧電バルク振動子 |
US6483229B2 (en) * | 2001-03-05 | 2002-11-19 | Agilent Technologies, Inc. | Method of providing differential frequency adjusts in a thin film bulk acoustic resonator (FBAR) filter and apparatus embodying the method |
JP4373949B2 (ja) * | 2004-04-20 | 2009-11-25 | 株式会社東芝 | 薄膜圧電共振器及びその製造方法 |
US20050248420A1 (en) * | 2004-05-07 | 2005-11-10 | Qing Ma | Forming integrated plural frequency band film bulk acoustic resonators |
JP2006319796A (ja) * | 2005-05-13 | 2006-11-24 | Toshiba Corp | 薄膜バルク波音響共振器 |
DE102005028927B4 (de) | 2005-06-22 | 2007-02-15 | Infineon Technologies Ag | BAW-Vorrichtung |
WO2007000929A1 (ja) * | 2005-06-29 | 2007-01-04 | Matsushita Electric Industrial Co., Ltd. | 圧電共振器、圧電フィルタ、それを用いた共用器及び通信機器 |
JP5036435B2 (ja) * | 2006-09-01 | 2012-09-26 | 太陽誘電株式会社 | 弾性波デバイス、フィルタおよび分波器 |
US7548140B2 (en) * | 2007-04-16 | 2009-06-16 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Bulk acoustic wave (BAW) filter having reduced second harmonic generation and method of reducing second harmonic generation in a BAW filter |
JP5200716B2 (ja) * | 2008-07-14 | 2013-06-05 | 株式会社村田製作所 | 分波器 |
JP5360432B2 (ja) * | 2011-01-27 | 2013-12-04 | 株式会社村田製作所 | 圧電デバイス |
JP5918522B2 (ja) * | 2011-12-12 | 2016-05-18 | 太陽誘電株式会社 | フィルタおよびデュプレクサ |
JP6333540B2 (ja) * | 2013-11-11 | 2018-05-30 | 太陽誘電株式会社 | 圧電薄膜共振子、フィルタ、及び分波器 |
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2016
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US20170214388A1 (en) | 2017-07-27 |
US11038486B2 (en) | 2021-06-15 |
JP2017135463A (ja) | 2017-08-03 |
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