JP2009510884A - 薄膜バルク音響(baw)共振器におけるまたはそれに関連する改良 - Google Patents
薄膜バルク音響(baw)共振器におけるまたはそれに関連する改良 Download PDFInfo
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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
- H03H9/02—Details
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02086—Means for compensation or elimination of undesirable effects
- H03H9/02118—Means for compensation or elimination of undesirable effects of lateral leakage between adjacent 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
- H03H9/0211—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
- H03H9/15—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
- H03H9/15—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
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
J.Kaitila他による「Spurious Resonance Free Bulk Acoustic Wave Resonators」、IEEE Ultrasonics Symposium、Honolulu、2003、84ページ
Claims (17)
- 第1および第2の層ならびにその間に介在する圧電層を備え、前記第1および第2の層がそれぞれ第1および第2の金属の重なり合う領域を電極として使用するために備え、前記第1の層がさらに誘電体の領域を前記重なり合いの領域の外側に、少なくとも部分的に前記第1の金属領域を囲んで備えるバルク音響(BAW)共振器であって、前記誘電体が前記第1の金属領域の質量と異なる質量を有するバルク音響(BAW)共振器。
- 前記誘電体と前記第1の金属の領域の質量の違いが5%〜15%の間であることを特徴とする請求項1に記載のBAW共振器。
- 前記誘電体の質量が前記第1の金属領域の質量より小さいことを特徴とする請求項2に記載のBAW共振器。
- 前記第1の金属領域がプラチナからなり、前記誘電体が五酸化タンタルからなることを特徴とする請求項3に記載のBAW共振器。
- 前記第1の金属領域がモリブデンからなり、前記誘電体が二酸化珪素からなることを特徴とする請求項3に記載のBAW共振器。
- 前記誘電体の質量が前記第1の金属領域の質量より大きいことを特徴とする請求項2に記載のBAW共振器。
- 前記第1の金属領域がアルミニウムからなり、前記誘電体が五酸化タンタルからなることを特徴とする請求項6に記載のBAW共振器。
- 前記誘電体が前記第1の金属領域と同じ厚さを有することを特徴とする請求項1から7のいずれか一項に記載のBAW共振器。
- 前記第2の層が誘電体の領域を前記重なり合いの領域の外側に少なくとも部分的に前記第2の金属領域を取り囲んで備えることを特徴とする請求項1から8のいずれか一項に記載のBAW共振器。
- 前記誘電体の領域が前記第1の金属領域から間隔を置いて配置されている請求項1から9のいずれか一項に記載のBAW共振器。
- 前記共振器が強固に装着されたバルク音響共振器(SBAR)からなることを特徴とする請求項1から10のいずれか一項に記載のBAW共振器。
- 前記共振器が膜バルク音響共振器(FBAR)からなることを特徴とする請求項1から10のいずれか一項に記載のBAW共振器。
- 請求項1から12のいずれか一項に記載の複数のBAW共振器を備えるフィルタ。
- 請求項1から12のいずれか一項に記載の複数のBAW共振器を備えるフィルタを含む無線周波数器機。
- 複数のバルク音響(BAW)共振器を備え、前記各BAW共振器の各々が第1および第2の層ならびにその間に介在する圧電層を備え、前記第1および第2の層がそれぞれ第1および第2の金属の重なり合う領域を電極として使用するために備えるフィルタの通過帯域で挿入損失を減少させる方法であって、前記方法が前記第1の層において誘電体の領域を前記重なり合いの領域の外側に、少なくとも部分的に前記第1の金属領域を囲んで形成するステップを備え、前記誘電体が前記第1の金属領域の質量と異なる質量を有する方法。
- 前記誘電体を前記第1の金属領域と同じ厚さを有するように形成するステップを特徴とする請求項14に記載の方法。
- 前記誘電体と前記第1の金属領域の質量の違いが5%〜15%の間であることを特徴とする請求項15または16に記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05109109 | 2005-09-30 | ||
PCT/IB2006/053534 WO2007036897A2 (en) | 2005-09-30 | 2006-09-28 | Improvements in or relating to thin-film bulk-acoustic wave (baw) resonators |
Publications (1)
Publication Number | Publication Date |
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JP2009510884A true JP2009510884A (ja) | 2009-03-12 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2008532959A Pending JP2009510884A (ja) | 2005-09-30 | 2006-09-28 | 薄膜バルク音響(baw)共振器におけるまたはそれに関連する改良 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8008993B2 (ja) |
EP (1) | EP1935093A2 (ja) |
JP (1) | JP2009510884A (ja) |
CN (1) | CN101278479B (ja) |
WO (1) | WO2007036897A2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015160716A1 (en) * | 2014-04-13 | 2015-10-22 | Texas Instruments Incorporated | Temperature compensated bulk acoustic wave resonator with a high coupling coefficient |
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Also Published As
Publication number | Publication date |
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US8008993B2 (en) | 2011-08-30 |
EP1935093A2 (en) | 2008-06-25 |
WO2007036897A3 (en) | 2007-07-05 |
WO2007036897A2 (en) | 2007-04-05 |
CN101278479B (zh) | 2011-04-13 |
US20090153268A1 (en) | 2009-06-18 |
CN101278479A (zh) | 2008-10-01 |
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