JP2013038658A - 弾性波デバイス - Google Patents
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- 239000000758 substrate Substances 0.000 claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 9
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 6
- 238000010897 surface acoustic wave method Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 183
- 239000010410 layer Substances 0.000 description 46
- 238000000034 method Methods 0.000 description 18
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- 238000012986 modification Methods 0.000 description 9
- 239000010409 thin film Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000000206 photolithography Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 238000009751 slip forming Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 239000010948 rhodium Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910052741 iridium Inorganic materials 0.000 description 2
- 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 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052703 rhodium Inorganic materials 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- H03H9/02102—Means for compensation or elimination of undesirable effects of temperature influence
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- 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
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- H03H9/13—Driving means, e.g. electrodes, coils for networks consisting of piezoelectric or electrostrictive materials
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- 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
- H03H2003/021—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 the resonators or networks being of the air-gap type
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- 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
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- 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
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- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
【解決手段】基板10と、前記基板上に形成された下部電極12と、前記下部電極上に形成された少なくとも2層の圧電膜14と、前記少なくとも2層の圧電膜に挟まれた絶縁膜28と、前記少なくとも2層の圧電膜上に形成された上部電極16と、を具備し、前記下部電極と前記上部電極とが対向する領域における前記少なくとも2層の圧電膜のうち最上の圧電膜の外周51は、前記上部電極の外周53より内側に位置する弾性波デバイス。
【選択図】図1
Description
比較例1
共振周波数の温度係数 −29.6ppm/℃
反共振周波数の温度係数 −31.0ppm/℃
実施例1
共振周波数の温度係数 −18.3ppm/℃
反共振周波数の温度係数 −20.1ppm/℃
12 下部電極
14 圧電膜
14a 圧電膜(最下の圧電膜)
14b 圧電膜(最上の圧電膜)
16 上部電極
28 絶縁膜
30 空隙
50 共振領域
52、54 領域
51、55 圧電膜の外周
53 上部電極の外周
Claims (10)
- 基板と、
前記基板上に形成された下部電極と、
前記下部電極上に形成された少なくとも2層の圧電膜と、
前記少なくとも2層の圧電膜に挟まれた絶縁膜と、
前記少なくとも2層の圧電膜上に形成された上部電極と、
を具備し、
前記下部電極と前記上部電極とが対向する領域における前記少なくとも2層の圧電膜のうち最上の圧電膜の外周は、前記上部電極の外周より内側に位置することを特徴とする弾性波デバイス。 - 前記最上の圧電膜の外周が前記上部電極の外周より内側に形成された領域において、前記少なくとも2層の圧電膜のうち最下の圧電膜の外周は、前記上部電極の外周より外側に位置することを特徴とする請求項1記載の弾性波デバイス。
- 前記下部電極の下に空隙または音響反射膜が設けられ、
前記最上の圧電膜の外周が前記上部電極の外周より内側に形成された領域において、前記空隙または音響反射膜の外周は、前記上部電極の外周より外側に位置することを特徴とする請求項1または2記載の弾性波デバイス。 - 前記下部電極の下に空隙が設けられ、
前記最上の圧電膜の外周が前記上部電極の外周より内側に形成された領域において、前記空隙の外周は、前記上部電極の外周より外側に位置し、かつ前記最下の圧電膜の外周の内側に位置することを特徴とする請求項2記載の弾性波デバイス。 - 前記絶縁膜は、前記少なくとも2層の圧電膜の弾性定数の温度係数とは逆符号の弾性定数の温度係数を有することを特徴とする請求項1から4のいずれか一項記載の弾性波デバイス。
- 前記少なくとも2層の圧電膜は2層であり、前記絶縁膜は1層であることを特徴とする請求項1から5のいずれか一項記載の弾性波デバイス。
- 前記少なくとも2層の圧電膜は主に窒化アルミニウムを含み、前記絶縁膜は主に酸化シリコンを含むことを特徴とする請求項1から6のいずれか一項記載の弾性波デバイス。
- 前記上部電極が形成されている領域のうち前記下部電極が形成されていない領域の少なくとも一部の領域内の前記上部電極と前記基板との間には前記絶縁膜が形成されていないことを特徴とする請求項1から7のいずれか一項記載の弾性波デバイス。
- 複数の請求項1〜8のいずれか一項記載の弾性波デバイスを含む弾性波共振器を具備し、
前記複数の弾性波共振器の前記下部電極は互いに接続され、接続された下部電極上には、前記複数の弾性波共振器の前記最下の圧電膜および前記最下の圧電膜上の絶縁膜の少なくとも一方が互いに接続されるように形成されていることを特徴とする請求項1から8記載のいずれか一項記載の弾性波デバイス。 - 弾性表面波縦結合二重モードフィルタにより平衡出力を出力する受信用フィルタと、
少なくとも一つの請求項1〜9のいずれか一項記載の弾性波デバイスを含む弾性波共振器をラダー型に接続した送信用フィルタと、を有することを特徴とする弾性波デバイス。
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JP2011174290A JP5792554B2 (ja) | 2011-08-09 | 2011-08-09 | 弾性波デバイス |
SG2012053997A SG188037A1 (en) | 2011-08-09 | 2012-07-20 | Acoustic wave device |
US13/556,865 US9184725B2 (en) | 2011-08-09 | 2012-07-24 | Acoustic wave device |
CN201210282502.9A CN102931942B (zh) | 2011-08-09 | 2012-08-09 | 声波器件 |
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JP2011174290A JP5792554B2 (ja) | 2011-08-09 | 2011-08-09 | 弾性波デバイス |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017126900A (ja) * | 2016-01-14 | 2017-07-20 | 太陽誘電株式会社 | 圧電薄膜共振器、フィルタおよびデュプレクサ |
JP2017158161A (ja) * | 2016-03-04 | 2017-09-07 | 太陽誘電株式会社 | 圧電薄膜共振器、フィルタおよびデュプレクサ |
US9929715B2 (en) | 2013-06-10 | 2018-03-27 | Taiyo Yuden Co., Ltd. | Acoustic wave device |
JP2019016835A (ja) * | 2017-07-03 | 2019-01-31 | 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 |
US10666220B2 (en) | 2016-06-29 | 2020-05-26 | Taiyo Yuden Co., Ltd. | Acoustic wave device |
JP2022518658A (ja) * | 2019-12-31 | 2022-03-16 | 中芯集成電路(寧波)有限公司 | 薄膜圧電弾性波共振器及び製造方法並びにフィルタ |
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JP5792554B2 (ja) | 2015-10-14 |
US20130038405A1 (en) | 2013-02-14 |
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CN102931942A (zh) | 2013-02-13 |
SG188037A1 (en) | 2013-03-28 |
US9184725B2 (en) | 2015-11-10 |
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