JP4963379B2 - 交互配列の縁部構造を利用した音響共振器の性能向上 - Google Patents
交互配列の縁部構造を利用した音響共振器の性能向上 Download PDFInfo
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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
- H03H9/24—Constructional features of resonators of material which is not piezoelectric, electrostrictive, or magnetostrictive
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- 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
-
- 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
- H03H9/02007—Details of bulk acoustic wave devices
-
- 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
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02086—Means for compensation or elimination of undesirable effects
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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
- H03H9/02—Details
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02086—Means for compensation or elimination of undesirable effects
- H03H9/02149—Means for compensation or elimination of undesirable effects of ageing changes of characteristics, e.g. electro-acousto-migration
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
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- 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
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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
- H03H9/02—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
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- H—ELECTRICITY
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- 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
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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
- 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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- 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
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Description
本出願は、「ACOUSTIC RESONATOR PERFORMANCE ENHANCEMENT USING SELECTIVE METAL ETCH」との名称で2004年6月14日に出願された米国特許出願第10/867540号明細書、「ACOUSTIC RESONATOR PERFORMANCE ENHANCEMENT USING FILLED RECESSED REGION」との名称で2005年4月6日に出願された米国特許出願第11/100311号明細書、「A THIN FILM BULK ACOUSTIC RESONATOR WITH A MASS LOADED PERIMETER」との名称で2004年10月1日に出願された米国特許出願第60/615225号明細書、および「A THIN FILM BULK ACOUSTIC RESONATOR WITH A MASS LOADED PERIMETER」との名称で2004年11月15日に出願された米国特許出願第10/990201号明細書に関連した出願であり、本発明の譲受人に譲渡されたものである。
44 凹部
36 第1の電極
40 FBAR
48 圧電材料の層
50 第2の電極
50a〜50e 第2の電極の辺
60、62 縁部
340 FBAR
342 基板
344 凹部
346 第1の電極
348 圧電材料の層
350 第2の電極
352 フォトマスク
354 追加の材料
360、362 縁部
Claims (27)
- 基板、
前記基板に隣接しかつ外側周辺を有する第1の電極、
前記第1の電極に隣接する圧電層、
前記圧電層に隣接しかつ外側周辺を有する第2の電極、および
前記第1の電極および前記第2の電極の一方に設けられている交互配列の縁部領域を備えており、
前記交互配列の縁部領域が、交互に配列された異なる音響インピーダンスを有する領域を備えており、音響共振器内で所定の波長の信号が反射して干渉し、Qを向上させるよう構成されている、音響共振器。 - 前記基板に凹部が形成されており、該凹部が凹部周辺を有している、請求項1に記載の音響共振器。
- 前記基板に音響ミラーが形成されており、前記第1の電極が、該音響ミラー上で橋渡しされている、請求項1に記載の音響共振器。
- 前記第2の電極に隣接するパッシベーション層をさらに備えている、請求項1から3のいずれか1項に記載の音響共振器。
- 前記交互配列の縁部領域が、相対的に切り欠かれている少なくとも1つの領域に隣接して、少なくとも1つの隆起した縁部を備えている、請求項1から4のいずれか1項に記載の音響共振器。
- 前記交互配列の縁部領域が、分布ブラッグ反射器である、請求項1から4のいずれか1項に記載の音響共振器。
- 前記交互配列の縁部領域の前記少なくとも1つの隆起した縁部が、誘電体、金属、金属合金、圧電材料、Mo、Pt、Al、Cu、W、Au、Ag、ポリイミド、BCB、SiO2、Si3N4、AlN、ZnO、LiNbO3、PZT、LiTaO3およびAl2O3含む群から選択される材料である、請求項5又は6に記載の音響共振器。
- 前記交互配列の縁部領域が、前記第2の電極の外側周辺に隣接して、前記凹部周辺の外側に位置している、請求項2及び4から7のいずれか1項に記載の音響共振器。
- 前記交互配列の縁部領域が、前記凹部周辺に重なっている、請求項2及び4から7のいずれか1項に記載の音響共振器。
- 前記交互配列の縁部領域が、前記凹部周辺の内側に位置している、請求項2及び4から7のいずれか1項に記載の音響共振器。
- 前記交互配列の縁部領域が、前記第1の電極および前記第2の電極の一方の外側周辺の実質的な部分を囲んで延びている、請求項2から10のいずれか1項に記載の音響共振器。
- 第1の電極、
前記第1の電極に隣接する圧電材料、
前記圧電材料の層に隣接しかつ外側周辺を有する第2の電極、および
前記第2の電極上に、前記外側周辺に隣接して構成されている交互配列の縁部領域を備えており、
前記交互配列の縁部領域が、交互に配列された異なる音響インピーダンスを有する領域を備えており、音響共振器内で所定の波長の信号が反射して干渉し、Qを向上させるよう構成されている、音響共振器。 - 基板をさらに備え、前記基板の第1の面に、凹部周辺を有する凹部が形成されており、前記第1の電極が、該凹部上で橋渡しされている、請求項12に記載の音響共振器。
- 音響ミラーが、前記基板の第1の面に形成されており、前記第1の電極が該音響ミラー上で橋渡しされている、請求項12に記載の音響共振器。
- 前記交互配列の縁部領域が、前記第2の電極上に、少なくとも1つの第1の隆起した縁部と第2の隆起した縁部とを備えており、該第1の隆起した縁部および該第2の隆起した縁部が、互いに隔置している、請求項12から14のいずれか1項に記載の音響共振器。
- 前記交互配列の縁部領域が、分布ブラッグ反射器である、請求項12から15のいずれか1項に記載の音響共振器。
- 前記第1のおよび第2の互いに隔置された隆起した縁部の幅が同じである、請求項15又は16に記載の音響共振器。
- 前記第1の縁部が、前記第2の縁部より幅広である、請求項15又は16に記載の音響共振器。
- 前記第1の縁部が、前記第2の電極より厚い、請求項15から18のいずれか1項に記載の音響共振器。
- 前記第1および第2の隆起した縁部の内側に、隆起した領域をさらに備えている、請求項15から19のいずれか1項に記載の音響共振器。
- 基板、
前記基板に隣接する第1の電極、
前記第1の電極に隣接する圧電材料の層、
前記圧電材料の層に隣接する第2の電極であって、前記第1の電極、前記圧電材料の層および当該第2の電極が、これら全体で外側端部および中心を有する音響膜を形成する、第2の電極、および
前記音響膜の外側端部に隣接する、当該音響膜内で横方向のモードの閉じ込めのための手段を備えており、
前記手段が交互配列の縁部領域であって、前記交互配列の縁部領域が、交互に配列された異なる音響インピーダンスを有する領域を備えており、音響共振器内で所定の波長の信号が反射して干渉し、Qを向上させるよう構成されている、音響共振器。 - 前記交互配列の縁部領域が、前記第2の電極上に、複数の隆起した縁部を備えており、該複数の隆起した縁部が、互いに隔置されている、請求項21に記載の音響共振器。
- 前記第2の電極上に設けられている前記隆起した縁部の少なくとも1つが、前記音響膜の端部の剛性を高め、これにより、前記共振器内でモードを閉じ込める、請求項22に記載の音響共振器。
- 基板を設け、
前記基板に隣接させて第1の電極を形成し、
前記第1の電極に隣接させて圧電層を形成し、
前記圧電層に隣接させて、電極材料を堆積させて第1の厚みまで第2の電極を形成し、
前記第2の電極上に第1のフォトマスクを堆積させ、
前記第2の電極上に、追加の材料を堆積させ、少なくとも1つの隆起した縁部を形成し、
前記フォトマスクを除去し、これにより、第2の電極上に交互配列の縁部領域が現れることを含み、
前記交互配列の縁部領域が、交互に配列された異なる音響インピーダンスを有する領域を備えており、音響共振器内で所定の波長の信号が反射して干渉し、Qを向上させるよう構成されている、音響共振器の製造方法。 - 前記第2の電極上に、追加の材料を堆積させ、複数の隆起した縁部を形成することをさらに含む、請求項24に記載の方法。
- 前記基板に凹部を形成することをさらに含む、請求項24又は25に記載の方法。
- 前記交互配列の縁部領域が、分布ブラッグ反射器である、請求項24から26のいずれか1項に記載の方法。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/159753 | 2005-06-23 | ||
| US11/159,753 US7388454B2 (en) | 2004-10-01 | 2005-06-23 | Acoustic resonator performance enhancement using alternating frame structure |
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| JP2007006501A JP2007006501A (ja) | 2007-01-11 |
| JP4963379B2 true JP4963379B2 (ja) | 2012-06-27 |
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|---|---|
| US (2) | US7388454B2 (ja) |
| JP (1) | JP4963379B2 (ja) |
| KR (1) | KR101280633B1 (ja) |
| GB (1) | GB2427773B (ja) |
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| US20100107389A1 (en) * | 2002-01-11 | 2010-05-06 | Avago Technologies Wireless Ip (Singapore) Pte. Ltd. | Method of fabricating an electrode for a bulk acoustic resonator |
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-
2005
- 2005-06-23 US US11/159,753 patent/US7388454B2/en not_active Expired - Lifetime
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- 2006-06-09 GB GB0611492A patent/GB2427773B/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| US20060071736A1 (en) | 2006-04-06 |
| US7388454B2 (en) | 2008-06-17 |
| US20080258842A1 (en) | 2008-10-23 |
| KR101280633B1 (ko) | 2013-07-01 |
| JP2007006501A (ja) | 2007-01-11 |
| GB2427773A (en) | 2007-01-03 |
| US7714684B2 (en) | 2010-05-11 |
| KR20060134866A (ko) | 2006-12-28 |
| GB2427773B (en) | 2009-07-15 |
| GB0611492D0 (en) | 2006-07-19 |
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