JP2006311181A - 圧電薄膜共振器およびフィルタ - Google Patents
圧電薄膜共振器およびフィルタ Download PDFInfo
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- JP2006311181A JP2006311181A JP2005130989A JP2005130989A JP2006311181A JP 2006311181 A JP2006311181 A JP 2006311181A JP 2005130989 A JP2005130989 A JP 2005130989A JP 2005130989 A JP2005130989 A JP 2005130989A JP 2006311181 A JP2006311181 A JP 2006311181A
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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 elements; 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 elements; 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
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
- H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; 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 elements; 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
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
- H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
- H03H2003/0414—Resonance frequency
- H03H2003/0421—Modification of the thickness of an element
- H03H2003/0428—Modification of the thickness of an element of an electrode
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
- H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
- H03H2003/0414—Resonance frequency
- H03H2003/045—Modification of the area of an element
- H03H2003/0457—Modification of the area of an element of an electrode
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
【解決手段】 本発明は、基板(10)上に形成された下部電極(12)と、下部電極(12)上に形成された圧電薄膜(14)と、圧電薄膜(14)上に形成された上部電極(16)と、を具備し、圧電薄膜(14)を挟み上部電極(12)と下部電極(16)の重なるメンブレン領域(22)が楕円様状であり、下部電極(12)が、上部電極(16)の引き出し電極部(16b)および下部電極(12)の引き出し電極部(12b)以外の領域でメンブレン領域の外側に延在する圧電薄膜共振器およびフィルタである。
【選択図】 図3
Description
12 下部電極
12a メンブレン領域部
12b 引き出し電極部
12c 拡張部
14 圧電薄膜
16 上部電極
16a メンブレン領域部
16b 引き出し電極部
16c 拡張部
18、18a、28a 基板の空隙
20,20a 中心周波数調整膜
22 メンブレン領域
Claims (9)
- 基板上に形成された下部電極と、
該下部電極上に形成された圧電薄膜と、
該圧電薄膜上に形成された上部電極と、を具備し、
前記圧電薄膜を挟み前記上部電極と前記下部電極の重なるメンブレン領域が楕円様状であり、
前記下部電極が、前記上部電極の引き出し電極部および前記下部電極の引き出し電極部以外の領域で前記メンブレン領域の外側に延在する圧電薄膜共振器。 - 前記下部電極の前記メンブレン領域より外側に延在した幅が、前記下部電極の引き出し配電極の幅より広い請求項1記載の圧電薄膜共振器
- 前記基板の表面に前記メンブレン領域を含むように空隙領域が形成された請求項1または2記載の圧電薄膜共振器。
- 前記下部電極は、前記下部電極の引き出し電極部以外の領域で前記空隙領域の外側に延在している請求項3記載の圧電薄膜共振器。
- 基板上に形成された下部電極と、
該下部電極上に形成された圧電薄膜と、
該圧電薄膜上に形成された上部電極と、
該上部電極上に形成された中心周波数調整膜を具備し、
前記中心周波数調整膜は前記圧電薄膜を挟み前記上部電極と前記下部電極の重なるメンブレン領域より大きく、前記メンブレン領域を含むように形成された圧電薄膜共振器。 - 前記中心周波数調整膜が酸化シリコン膜、窒化シリコン膜、酸化アルミニウム膜または窒化アルミニウム膜である請求項5記載の圧電薄膜共振器。
- 前記中心周波数調整膜が、1nm以上200nm以下の膜厚を有する請求項5または6記載の圧電薄膜共振器。
- 前記圧電薄膜は、(002)方向を主軸とする配向性を有する窒化アルミニウムまたは酸化亜鉛である請求項1から7のいずれか一項記載の圧電薄膜共振器。
- 請求項1から8のいずれか一項記載の圧電薄膜共振器を複数組み合わせて構成されるフィルタ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005130989A JP4550658B2 (ja) | 2005-04-28 | 2005-04-28 | 圧電薄膜共振器およびフィルタ |
DE200610020230 DE102006020230A1 (de) | 2005-04-28 | 2006-04-27 | Piezoelektrischer Dünnfilmresonator und Filter, der diesen aufweist |
KR20060038205A KR100841166B1 (ko) | 2005-04-28 | 2006-04-27 | 압전 박막 공진기 및 필터 |
CN2006100781622A CN1855711B (zh) | 2005-04-28 | 2006-04-28 | 压电薄膜谐振器和具有其的滤波器 |
US11/413,104 US7368859B2 (en) | 2005-04-28 | 2006-04-28 | Piezoelectric thin-film resonator and filter having the same |
Applications Claiming Priority (1)
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JP2005130989A JP4550658B2 (ja) | 2005-04-28 | 2005-04-28 | 圧電薄膜共振器およびフィルタ |
Publications (2)
Publication Number | Publication Date |
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JP2006311181A true JP2006311181A (ja) | 2006-11-09 |
JP4550658B2 JP4550658B2 (ja) | 2010-09-22 |
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JP2005130989A Expired - Lifetime JP4550658B2 (ja) | 2005-04-28 | 2005-04-28 | 圧電薄膜共振器およびフィルタ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7368859B2 (ja) |
JP (1) | JP4550658B2 (ja) |
KR (1) | KR100841166B1 (ja) |
CN (1) | CN1855711B (ja) |
DE (1) | DE102006020230A1 (ja) |
Cited By (4)
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JP2008236367A (ja) * | 2007-03-20 | 2008-10-02 | Nippon Dempa Kogyo Co Ltd | 圧電薄膜振動子の製造方法及び圧電薄膜振動子 |
JP2009213037A (ja) * | 2008-03-06 | 2009-09-17 | Fujitsu Ltd | 圧電薄膜共振器、フィルタ、および通信装置 |
JP2010103963A (ja) * | 2008-09-29 | 2010-05-06 | Nippon Dempa Kogyo Co Ltd | 水晶振動片及び水晶振動子 |
US8854156B2 (en) | 2009-02-20 | 2014-10-07 | Ube Industries, Ltd. | Thin-film piezoelectric resonator and thin-film piezoelectric filter using the same |
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JPWO2006062082A1 (ja) * | 2004-12-07 | 2008-06-12 | 松下電器産業株式会社 | 薄膜弾性波共振子 |
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2006
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- 2006-04-27 DE DE200610020230 patent/DE102006020230A1/de not_active Withdrawn
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2008236367A (ja) * | 2007-03-20 | 2008-10-02 | Nippon Dempa Kogyo Co Ltd | 圧電薄膜振動子の製造方法及び圧電薄膜振動子 |
JP2009213037A (ja) * | 2008-03-06 | 2009-09-17 | Fujitsu Ltd | 圧電薄膜共振器、フィルタ、および通信装置 |
JP2010103963A (ja) * | 2008-09-29 | 2010-05-06 | Nippon Dempa Kogyo Co Ltd | 水晶振動片及び水晶振動子 |
US8854156B2 (en) | 2009-02-20 | 2014-10-07 | Ube Industries, Ltd. | Thin-film piezoelectric resonator and thin-film piezoelectric filter using the same |
Also Published As
Publication number | Publication date |
---|---|
CN1855711B (zh) | 2011-07-20 |
KR20060113513A (ko) | 2006-11-02 |
JP4550658B2 (ja) | 2010-09-22 |
US7368859B2 (en) | 2008-05-06 |
US20060244553A1 (en) | 2006-11-02 |
CN1855711A (zh) | 2006-11-01 |
DE102006020230A1 (de) | 2006-11-09 |
KR100841166B1 (ko) | 2008-06-24 |
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