JP4911201B2 - 弾性境界波装置 - Google Patents
弾性境界波装置 Download PDFInfo
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- JP4911201B2 JP4911201B2 JP2009160341A JP2009160341A JP4911201B2 JP 4911201 B2 JP4911201 B2 JP 4911201B2 JP 2009160341 A JP2009160341 A JP 2009160341A JP 2009160341 A JP2009160341 A JP 2009160341A JP 4911201 B2 JP4911201 B2 JP 4911201B2
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Images
Classifications
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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
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
-
- 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
- H03H3/08—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 resonators or networks using surface acoustic waves
-
- 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
- H03H9/0222—Details of interface-acoustic, boundary, pseudo-acoustic or Stonely 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
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02929—Means for compensation or elimination of undesirable effects of ageing changes of characteristics, e.g. electro-acousto-migration
-
- 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
- H03H9/05—Holders or supports
- H03H9/058—Holders or supports for surface acoustic wave devices
- H03H9/059—Holders or supports for surface acoustic wave devices consisting of mounting pads or bumps
-
- 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
- H03H9/05—Holders or supports
- H03H9/10—Mounting in enclosures
- H03H9/1064—Mounting in enclosures for surface acoustic wave [SAW] devices
- H03H9/1078—Mounting in enclosures for surface acoustic wave [SAW] devices the enclosure being defined by a foil covering the non-active sides of the SAW device
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/42—Piezoelectric device making
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10T29/49005—Acoustic transducer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/4908—Acoustic transducer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49789—Obtaining plural product pieces from unitary workpiece
- Y10T29/49798—Dividing sequentially from leading end, e.g., by cutting or breaking
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Signal Processing (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Description
.J.Campvell and W.R.Jones,IEEE Trans.Sonics and Ultrason.,Vol.SU−15(1968)pp.209−217)に開示されている方法を元に行ったものである。ここでは、SiO2とAuとの境界及びAuとLiNbO3との境界における変位と上下方向の応力を連続とし、短絡境界であるため電位を0とし、SiO2の厚みを所定の値とし、15°Y−X伝搬のLiNbO3の厚みを無限大として、境界波の変位分布とスプリアスモードの変位分布を求めた。
2…第1の媒質層
3…IDT
4,5…反射器
6…第2の媒質層
7…吸音層
7a…第1の吸音材料層
7b…第2の吸音材料層
21…弾性境界波装置
22…第1の媒質層
23…IDT
26…第2の媒質層
26a,26b…媒質材料層
31…弾性境界波装置
41,42…導体層
51…弾性境界波装置
52…配線電極
53,54…スルーホール電極
55…配線電極
61…弾性境界波装置
63…IDT
66…第2の媒質層
67…接続電極
68…第3の媒質層
69…配線電極
71…配線電極
72…配線電極
73…外部接続電極
74…保護膜
81…弾性境界波装置
82…熱伝導性材料層
83…エポキシ樹脂層
84,85…配線電極
86…保護膜
90…弾性境界波装置
91…弾性境界波装置チップ
91a,91b…電極
92a,92b…バンプ
93…セラミック基板
93a,93b…電極
94…保護膜
96…弾性境界波装置
97a,97b…導電ペースト
98a,98b…外部端子
99…補強樹脂層
101…ウエハー
102…IDT
103,104…反射器
105,106…配線電極
107…第2の媒質層
107a…上面
108…配線電極
109…吸音層
110…SiN膜
111,112…開口部
113,114…外部端子
121…第4の媒質層
121A…パターニングされた感光性樹脂薄膜
123…吸音層
124,125…開口部
126,127…外部接続端子
132,133…外部接続端子
134…吸音層
Claims (8)
- 第1の媒質層と第2の媒質層との境界を伝搬する弾性境界波を利用した弾性境界波装置であって、
第1の媒質層と、
前記第1の媒質層に積層された第2の媒質層と、
前記第1,第2の媒質層の境界に設けられた電極と、
を備え、
前記第2の媒質層は、第1の媒質材料層と前記第1の媒質材料層の上に積層された第2の媒質材料層とからなる2層構造を有し、
前記第2の媒質層の境界面とは反対側の面の直上に配されており、前記第2の媒質層の境界面とは反対側の面において変位を有し、弾性境界波装置の反共振周波数よりも高域側もしくは通過帯域よりも高域側に現れる、スプリアスとなるモードを減衰させる吸音層をさらに備えることを特徴とする、弾性境界波装置。 - 前記吸音層における横波の音速が、前記第2の媒質層の横波の音速よりも低速である、請求項1に記載の弾性境界波装置。
- 前記吸音層における縦波の音速が、前記第2の媒質層における縦波の音速よりも低速である、請求項1に記載の弾性境界波装置。
- 前記吸音層の横波の音速が、前記第2の媒質層における横波の音速の0.13倍以上、1.23倍以下の範囲にある、請求項1に記載の弾性境界波装置。
- 前記吸音層における音響インピーダンスが、前記第2の媒質層の音響インピーダンスの0.20倍〜5.30倍の範囲にある、請求項1〜4のいずれか1項に記載の弾性境界波装置。
- 前記吸音層が、樹脂、ガラス、セラミックス及び金属からなる群から選択された少なくとも1種により構成されている、請求項1〜5のいずれか1項に記載の弾性境界波装置。
- 前記吸音層が積層構造を有する、請求項1〜6のいずれか1項に記載の弾性境界波装置。
- 吸音層が複数の吸音材料層を積層してなる積層構造を有し、第2の媒質層に近い側の吸音材料層の音響特性インピーダンスが、該吸音材料層よりも第2の媒質層から隔てられた吸音材料層の音響インピーダンスと、第2の媒質層の音響インピーダンスとの間の中間の値を有する、請求項7に記載の弾性境界波装置。
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US (3) | US7486001B2 (ja) |
EP (1) | EP1635459B1 (ja) |
JP (2) | JP4419962B2 (ja) |
KR (2) | KR100821483B1 (ja) |
CN (1) | CN1788415B (ja) |
WO (1) | WO2005069486A1 (ja) |
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WO2005069486A1 (ja) * | 2004-01-19 | 2005-07-28 | Murata Manufacturing Co., Ltd. | 弾性境界波装置 |
EP2383888A3 (en) * | 2004-03-29 | 2012-08-01 | Murata Manufacturing Co., Ltd. | Boundary acoustic wave device manufacturing method and boundary acoustic wave device |
JP2006080493A (ja) * | 2004-08-12 | 2006-03-23 | Ricoh Microelectronics Co Ltd | 電極基板 |
JP2006279609A (ja) * | 2005-03-29 | 2006-10-12 | Fujitsu Media Device Kk | 弾性境界波素子、共振子およびラダー型フィルタ |
US7619347B1 (en) * | 2005-05-24 | 2009-11-17 | Rf Micro Devices, Inc. | Layer acoustic wave device and method of making the same |
WO2007007462A1 (ja) * | 2005-07-14 | 2007-01-18 | Murata Manufacturing Co., Ltd. | 弾性境界波装置及びその製造方法 |
JP4861664B2 (ja) * | 2005-09-07 | 2012-01-25 | ベックマン コールター, インコーポレイテッド | 攪拌装置及び攪拌装置を備えた分析装置 |
CN101305516B (zh) * | 2005-11-11 | 2012-08-22 | 株式会社村田制作所 | 声界面波装置的制造方法及声界面波装置 |
DE102005055871A1 (de) * | 2005-11-23 | 2007-05-24 | Epcos Ag | Elektroakustisches Bauelement |
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JPWO2005069486A1 (ja) | 2007-07-26 |
KR20060024399A (ko) | 2006-03-16 |
EP1635459B1 (en) | 2017-10-25 |
US8381386B2 (en) | 2013-02-26 |
WO2005069486A1 (ja) | 2005-07-28 |
US8677604B2 (en) | 2014-03-25 |
CN1788415B (zh) | 2012-09-12 |
CN1788415A (zh) | 2006-06-14 |
KR100821483B1 (ko) | 2008-04-10 |
EP1635459A4 (en) | 2011-03-30 |
KR100850861B1 (ko) | 2008-08-06 |
US7486001B2 (en) | 2009-02-03 |
JP2009225476A (ja) | 2009-10-01 |
US20130133179A1 (en) | 2013-05-30 |
KR20070110412A (ko) | 2007-11-16 |
US20090102318A1 (en) | 2009-04-23 |
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JP4419962B2 (ja) | 2010-02-24 |
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