JP5125728B2 - 弾性波素子と、これを用いた共振器、フィルタ、及び電子機器 - Google Patents
弾性波素子と、これを用いた共振器、フィルタ、及び電子機器 Download PDFInfo
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- JP5125728B2 JP5125728B2 JP2008116806A JP2008116806A JP5125728B2 JP 5125728 B2 JP5125728 B2 JP 5125728B2 JP 2008116806 A JP2008116806 A JP 2008116806A JP 2008116806 A JP2008116806 A JP 2008116806A JP 5125728 B2 JP5125728 B2 JP 5125728B2
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- piezoelectric substrate
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- dielectric layer
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- 239000000758 substrate Substances 0.000 claims description 54
- 230000001902 propagating effect Effects 0.000 claims description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 7
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical group [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000003989 dielectric material Substances 0.000 claims 1
- 244000126211 Hericium coralloides Species 0.000 description 15
- 238000010586 diagram Methods 0.000 description 13
- 230000008878 coupling Effects 0.000 description 12
- 238000010168 coupling process Methods 0.000 description 12
- 238000005859 coupling reaction Methods 0.000 description 12
- 230000005855 radiation Effects 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- UKDIAJWKFXFVFG-UHFFFAOYSA-N potassium;oxido(dioxo)niobium Chemical compound [K+].[O-][Nb](=O)=O UKDIAJWKFXFVFG-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 1
- LAJZODKXOMJMPK-UHFFFAOYSA-N tellurium dioxide Chemical compound O=[Te]=O LAJZODKXOMJMPK-UHFFFAOYSA-N 0.000 description 1
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Description
以下、本発明の実施の形態1における弾性波素子について図面を参照しながら説明する。図1は、実施の形態1における弾性波素子の断面模式図である。
0.085λ/a<h<0.095λ/aの場合、H/λ>-0.0018θ+0.1909
0.095λ/a<h<0.105λ/aの場合、H/λ>-0.0014θ+0.1376
0.0105λ/a<h<0.115λ/aの場合、H/λ>-0.0013θ+0.1017
0.115λ/a<h<0.125λ/aの場合、H/λ>-0.0011θ+0.0754
0.125λ/a<h<0.135λ/aの場合、H/λ>-0.0009θ+0.0536
である。
7 圧電基板
8 櫛歯電極
9 第1誘電体層
10 第2誘電体層
Claims (4)
- 圧電基板と、
前記圧電基板の上に設けられた櫛歯電極と、
前記圧電基板の上に前記櫛歯電極を覆うように設けられた第1誘電体層と、
前記第1誘電体層の上に設けられた第2誘電体層を備え、
前記第2誘電体層を伝搬するバルク波のうち横波の速度Vsは前記櫛歯電極において励振される横波主体の弾性波の速度Vより速く、かつ、
前記櫛歯電極において励振される弾性波の速度Vは、前記圧電基板を伝搬するバルク波のうち最も遅い横波の速度Vbより遅く、かつ
前記圧電基板における回転Y板のカット角が15度以上25度以下であり、
前記圧電基板は、ニオブ酸リチウムであり、前記第1誘電体は酸化ケイ素であり、
前記圧電基板の回転Y板のカット角をθ(度)、前記櫛歯電極の密度の銅密度に対する比をa、前記櫛歯電極において励振される横波主体の弾性波の波長をλ、前記櫛歯電極の膜厚をh、前記第1誘電体層の膜厚をHとすると、
0.085λ/a<h<0.095λ/aの場合、H/λ>-0.0018θ+0.1909
0.095λ/a<h<0.105λ/aの場合、H/λ>-0.0014θ+0.1376
0.105λ/a<h<0.115λ/aの場合、H/λ>-0.0013θ+0.1017
0.115λ/a<h<0.125λ/aの場合、H/λ>-0.0011θ+0.0754
0.125λ/a<h<0.135λ/aの場合、H/λ>-0.0009θ+0.0536
を満たし、
かつ、前記第2誘電体層の厚みは1λ以上である弾性波素子。 - 請求項1の弾性波素子を用いた共振器。
- 請求項1の弾性波素子を用いたフィルタ。
- 請求項3に記載のフィルタと、
前記フィルタに接続された半導体集積回路素子と、
前記半導体集積回路素子に接続された再生装置とを備えた電子機器。
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JP2008116806A JP5125728B2 (ja) | 2008-04-28 | 2008-04-28 | 弾性波素子と、これを用いた共振器、フィルタ、及び電子機器 |
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JP2008116806A JP5125728B2 (ja) | 2008-04-28 | 2008-04-28 | 弾性波素子と、これを用いた共振器、フィルタ、及び電子機器 |
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JP2009267904A JP2009267904A (ja) | 2009-11-12 |
JP5125728B2 true JP5125728B2 (ja) | 2013-01-23 |
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Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5299521B2 (ja) * | 2009-12-15 | 2013-09-25 | 株式会社村田製作所 | 弾性境界波装置 |
JP5579429B2 (ja) * | 2009-12-15 | 2014-08-27 | 太陽誘電株式会社 | 弾性波素子、通信モジュール、通信装置 |
JP2011135245A (ja) * | 2009-12-24 | 2011-07-07 | Panasonic Corp | 弾性波デバイスとこれを用いた電子機器、及び弾性波デバイスの製造方法 |
DE112010005279B4 (de) * | 2010-02-17 | 2017-03-30 | Murata Manufacturing Co., Ltd. | Vorrichtung für elastische Wellen |
DE102010034121A1 (de) | 2010-08-12 | 2012-02-16 | Epcos Ag | Mit akustischen Wellen arbeitendes Bauelement mit reduziertem Temperaturgang der Frequenzlage und Verfahren zur Herstellung |
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JP4356613B2 (ja) * | 2003-02-10 | 2009-11-04 | 株式会社村田製作所 | 弾性境界波装置 |
JP4178328B2 (ja) * | 2005-04-25 | 2008-11-12 | 株式会社村田製作所 | 弾性境界波装置 |
JP2007267366A (ja) * | 2006-02-28 | 2007-10-11 | Fujitsu Media Device Kk | 弾性境界波素子、共振器およびフィルタ |
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