KR100950391B1 - 압전 박막 공진기 및 필터 - Google Patents
압전 박막 공진기 및 필터 Download PDFInfo
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- KR100950391B1 KR100950391B1 KR20080045475A KR20080045475A KR100950391B1 KR 100950391 B1 KR100950391 B1 KR 100950391B1 KR 20080045475 A KR20080045475 A KR 20080045475A KR 20080045475 A KR20080045475 A KR 20080045475A KR 100950391 B1 KR100950391 B1 KR 100950391B1
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- lower electrode
- film
- piezoelectric
- piezoelectric thin
- resonator
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- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 1
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- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
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- 239000010453 quartz Substances 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- 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
-
- 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
- H03H9/174—Membranes
-
- 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
- H03H9/0211—Means for compensation or elimination of undesirable effects of reflections
-
- 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
- H03H9/02133—Means for compensation or elimination of undesirable effects of stress
-
- 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
- H03H9/132—Driving means, e.g. electrodes, coils for networks consisting of piezoelectric or electrostrictive materials characterized by a particular shape
-
- 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
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
Claims (12)
- 기판 상에 설치된 하부 전극과,상기 기판상 및 상기 하부 전극 상에 설치된 압전막과,상기 압전막을 사이에 두고 상기 하부 전극과 대향하는 부분을 갖도록 상기 압전막 상에 설치된 상부 전극과,상기 하부 전극과 상기 상부 전극이 대향하는 부분의 상기 하부 전극 중 적어도 일부의 외주의 상기 기판 상에 상기 하부 전극을 따라서 설치된 부가막을 구비하고, 상기 압전막은 상기 부가막을 덮도록 설치되어 있는 것을 특징으로 하는 압전 박막 공진기.
- 삭제
- 제1항에 있어서, 상기 부가막은 상기 하부 전극과 동일한 재료의 막인 것을 특징으로 하는 압전 박막 공진기.
- 제1항에 있어서, 상기 하부 전극과 상기 상부 전극이 대향하는 부분 아래의 상기 기판과 상기 하부 전극 사이에 돔 형상의 팽창부를 갖는 공극이 형성되어 있는 것을 특징으로 하는 압전 박막 공진기.
- 제4항에 있어서, 상기 하부 전극에는 상기 공극에 통하는 구멍부가 형성되어 있는 것을 특징으로 하는 압전 박막 공진기.
- 제1항에 있어서, 상기 하부 전극과 상기 상부 전극이 대향하는 부분 아래의 상기 기판에 공극이 형성되어 있는 것을 특징으로 하는 압전 박막 공진기.
- 제4항에 있어서, 상기 하부 전극과 상기 상부 전극이 대향하는 부분은 상기 공극을 상기 기판에 투영한 영역에 포함되는 것을 특징으로 하는 압전 박막 공진기.
- 제1항에 있어서, 상기 하부 전극과 상기 상부 전극이 대향하는 부분의 응력은 압축 응력인 것을 특징으로 하는 압전 박막 공진기.
- 제1항에 있어서, 상기 하부 전극과 상기 상부 전극이 대향하는 부분은 타원형인 것을 특징으로 하는 압전 박막 공진기.
- 제1항에 있어서, 상기 하부 전극과 상기 상부 전극이 대향하는 부분은 비평행으로 이루어지는 다각형인 것을 특징으로 하는 압전 박막 공진기.
- 제1항에 있어서, 상기 압전막은 (002) 방향을 메인축으로 하는 배향성을 나타내는 질화알루미늄 또는 산화아연인 것을 특징으로 하는 압전 박막 공진기.
- 제1항에 기재된 압전 박막 공진기를 구비하는 것을 특징으로 하는 필터.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPJP-P-2007-00131094 | 2007-05-17 | ||
JP2007131094A JP5080858B2 (ja) | 2007-05-17 | 2007-05-17 | 圧電薄膜共振器およびフィルタ |
Publications (2)
Publication Number | Publication Date |
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KR20080101765A KR20080101765A (ko) | 2008-11-21 |
KR100950391B1 true KR100950391B1 (ko) | 2010-03-29 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR20080045475A KR100950391B1 (ko) | 2007-05-17 | 2008-05-16 | 압전 박막 공진기 및 필터 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7737806B2 (ko) |
JP (1) | JP5080858B2 (ko) |
KR (1) | KR100950391B1 (ko) |
CN (1) | CN101309074B (ko) |
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JP5319491B2 (ja) * | 2009-10-22 | 2013-10-16 | 太陽誘電株式会社 | 圧電薄膜共振子 |
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US9070861B2 (en) * | 2011-02-15 | 2015-06-30 | Fujifilm Dimatix, Inc. | Piezoelectric transducers using micro-dome arrays |
JP5815329B2 (ja) | 2011-08-22 | 2015-11-17 | 太陽誘電株式会社 | 弾性波デバイス |
JP2014135568A (ja) * | 2013-01-08 | 2014-07-24 | Chiba Univ | 圧電薄膜共振器およびフィルタ |
US9437802B2 (en) * | 2013-08-21 | 2016-09-06 | Fujifilm Dimatix, Inc. | Multi-layered thin film piezoelectric devices and methods of making the same |
US9525119B2 (en) | 2013-12-11 | 2016-12-20 | Fujifilm Dimatix, Inc. | Flexible micromachined transducer device and method for fabricating same |
EP3255689B1 (en) | 2015-02-04 | 2019-12-04 | Sumitomo Chemical Company Limited | Method for manufacturing niobate-system ferroelectric thin film device |
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JP6605216B2 (ja) | 2015-03-26 | 2019-11-13 | 住友化学株式会社 | 強誘電体薄膜積層基板、強誘電体薄膜素子、および強誘電体薄膜積層基板の製造方法 |
JP6605215B2 (ja) | 2015-03-26 | 2019-11-13 | 住友化学株式会社 | 強誘電体薄膜積層基板、強誘電体薄膜素子、および強誘電体薄膜積層基板の製造方法 |
JP2016184692A (ja) * | 2015-03-26 | 2016-10-20 | 住友化学株式会社 | 強誘電体薄膜素子の製造方法 |
JP6566682B2 (ja) | 2015-03-30 | 2019-08-28 | 住友化学株式会社 | 強誘電体薄膜素子の製造方法 |
US11736088B2 (en) | 2016-11-15 | 2023-08-22 | Global Communication Semiconductors, Llc | Film bulk acoustic resonator with spurious resonance suppression |
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US11764750B2 (en) * | 2018-07-20 | 2023-09-19 | Global Communication Semiconductors, Llc | Support structure for bulk acoustic wave resonator |
CN109150127B (zh) * | 2018-07-27 | 2022-10-28 | 开元通信技术(厦门)有限公司 | 薄膜体声波谐振器及其制作方法、滤波器 |
JP7190313B2 (ja) * | 2018-10-04 | 2022-12-15 | 太陽誘電株式会社 | 圧電薄膜共振器、フィルタおよびマルチプレクサ |
JP7278305B2 (ja) * | 2018-11-05 | 2023-05-19 | 京セラ株式会社 | 弾性波装置、分波器および通信装置 |
US11817839B2 (en) | 2019-03-28 | 2023-11-14 | Global Communication Semiconductors, Llc | Single-crystal bulk acoustic wave resonator and method of making thereof |
CN111786654B (zh) * | 2019-04-04 | 2023-01-06 | 中芯集成电路(宁波)有限公司上海分公司 | 体声波谐振器及其制造方法和滤波器、射频通信系统 |
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JP5080858B2 (ja) | 2012-11-21 |
US7737806B2 (en) | 2010-06-15 |
JP2008288819A (ja) | 2008-11-27 |
KR20080101765A (ko) | 2008-11-21 |
US20080284543A1 (en) | 2008-11-20 |
CN101309074A (zh) | 2008-11-19 |
CN101309074B (zh) | 2012-01-11 |
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