JP2018006851A - 弾性波デバイスの製造方法及び弾性波デバイス - Google Patents
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- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
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- 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
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- H10N30/00—Piezoelectric or electrostrictive devices
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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
- H03H2003/023—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 membrane 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
- H03H2003/025—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 comprising an acoustic mirror
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- H—ELECTRICITY
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- 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
- H03H2003/027—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 microelectro-mechanical [MEMS] type
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- H10B12/03—Making the capacitor or connections thereto
- H10B12/033—Making the capacitor or connections thereto the capacitor extending over the transistor
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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
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- 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
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Abstract
Description
12 誘電体膜
13 開口
14 配線層
15 端面
16 保護膜
18 パッド電極
20 IDT
22 電極指
24 バスバー
26 櫛型電極
28 反射器
30 Ti層
32 Cu層
34 Cr層
36 Ti層
38 Au層
40〜40b レジスト膜
41 開口
42a〜42c バンプ
50 誘電体膜
51 開口
52 厚膜部
54 残渣物
60 突起部
100、110、200、210、400 弾性波共振器
120、130、220、230、300、310 ラダー型フィルタ
S1〜S4 直列共振器
P1〜P3 並列共振器
Claims (8)
- 圧電基板上に、櫛型電極と前記櫛型電極に接続された配線層とを形成する工程と、
前記圧電基板上に、前記櫛型電極及び前記配線層よりも厚い膜厚で前記櫛型電極と前記配線層とを覆う、他の元素がドープ又は非ドープの酸化シリコンからなる第1誘電体膜を形成する工程と、
前記第1誘電体膜上に、前記配線層上に開口を有する第2誘電体膜を形成する工程と、
前記配線層の端面と前記櫛型電極とを覆って前記第1誘電体膜が残存するように、前記第2誘電体膜の前記開口で露出した前記第1誘電体膜を、前記第2誘電体膜のエッチングレートが前記第1誘電体膜よりも遅くなるようなエッチング液を用いたウエットエッチングで除去する工程と、を備える弾性波デバイスの製造方法。 - 圧電基板上に、櫛型電極と前記櫛型電極に接続された配線層とを形成する工程と、
前記圧電基板上に、前記櫛型電極及び前記配線層よりも厚い膜厚で前記櫛型電極と前記配線層とを覆う、他の元素がドープ又は非ドープの酸化シリコンからなる第1誘電体膜を形成する工程と、
前記第1誘電体膜上に、酸化タンタル、酸化ニオブ、酸化タングステン、酸化チタン、酸化テルル、酸化アルミニウム、窒化シリコン、窒化アルミニウム、及び炭化シリコンのうちの少なくとも1種を含み、前記配線層上に開口を有する第2誘電体膜を形成する工程と、
前記配線層の端面と前記櫛型電極とを覆って前記第1誘電体膜が残存するように、前記第2誘電体膜の前記開口で露出した前記第1誘電体膜を、フッ酸系エッチング液を用いたウエットエッチングで除去する工程と、を備える弾性波デバイスの製造方法。 - 前記第2誘電体膜を形成する工程は、前記配線層上及び前記櫛型電極と前記配線層とが形成されていない領域上に前記開口を有する前記第2誘電体膜を形成し、
前記第1誘電体膜を除去する工程は、前記第1誘電体膜が前記配線層の端面を覆い且つ前記配線層の端面に沿って残存するように、前記第2誘電体膜の前記開口で露出した前記第1誘電体膜を除去する、請求項1または2記載の弾性波デバイスの製造方法。 - 前記第1誘電体膜を除去する工程は、前記櫛型電極及び前記配線層が形成されていない領域に前記第1誘電体膜が突起部として残存するように、前記第1誘電体膜を除去する、請求項3記載の弾性波デバイスの製造方法。
- 前記第2誘電体膜を形成する工程は、前記第1誘電体膜を除去することで形成される開口の周囲における厚さが他の部分よりも厚い厚膜部を有する前記第2誘電体膜を形成する、請求項1から4のいずれか一項記載の弾性波デバイスの製造方法。
- 前記第2誘電体膜を形成する工程は、前記第2誘電体膜に対してドライエッチングを行うことで側壁に残渣物が付着した前記厚膜部を有する前記第2誘電体膜を形成する、請求項5記載の弾性波デバイスの製造方法。
- 圧電基板と、
前記圧電基板上に設けられた櫛型電極と、
前記圧電基板上に設けられ、前記櫛型電極に接続された配線層と、
前記圧電基板上に設けられ、前記櫛型電極と前記配線層の端面とを覆い且つ前記配線層を露出する開口を有し、前記櫛型電極及び前記配線層よりも厚い膜厚を有する、他の元素がドープ又は非ドープの酸化シリコンからなる第1誘電体膜と、
前記第1誘電体膜上に設けられ、フッ酸系エッチング液を用いたウエットエッチングにおけるエッチングレートが前記第1誘電体膜よりも遅い第2誘電体膜と、を備える弾性波デバイス。 - 圧電基板と、
前記圧電基板上に設けられた櫛型電極と、
前記圧電基板上に設けられ、前記櫛型電極に接続された配線層と、
前記圧電基板上に設けられ、前記櫛型電極と前記配線層の端面とを覆い且つ前記配線層を露出する開口を有し、前記櫛型電極及び前記配線層よりも厚い膜厚を有する、他の元素がドープ又は非ドープの酸化シリコンからなる第1誘電体膜と、
前記第1誘電体膜上に設けられ、酸化タンタル、酸化ニオブ、酸化タングステン、酸化チタン、酸化テルル、酸化アルミニウム、窒化シリコン、窒化アルミニウム、及び炭化シリコンのうちの少なくとも1種を含む第2誘電体膜と、を備える弾性波デバイス。
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| US15/615,012 US10763813B2 (en) | 2016-06-28 | 2017-06-06 | Method of fabricating acoustic wave device |
| CN201710499132.7A CN107547060B (zh) | 2016-06-28 | 2017-06-27 | 制造声波装置的方法和声波装置 |
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| WO2019049830A1 (ja) * | 2017-09-05 | 2019-03-14 | 株式会社村田製作所 | フィルタ装置およびフィルタ装置の製造方法 |
| WO2021220887A1 (ja) * | 2020-04-27 | 2021-11-04 | 株式会社村田製作所 | 弾性波装置 |
| JP7055499B1 (ja) | 2021-05-24 | 2022-04-18 | 三安ジャパンテクノロジー株式会社 | 弾性波デバイスおよびその弾性波デバイスを備えるモジュール |
| WO2023100670A1 (ja) * | 2021-12-01 | 2023-06-08 | 株式会社村田製作所 | フィルタ装置 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107547060B (zh) | 2021-02-09 |
| US10763813B2 (en) | 2020-09-01 |
| JP6556103B2 (ja) | 2019-08-07 |
| CN107547060A (zh) | 2018-01-05 |
| US20170370791A1 (en) | 2017-12-28 |
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