JP5510465B2 - 圧電デバイス、圧電デバイスの製造方法 - Google Patents
圧電デバイス、圧電デバイスの製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 118
- 238000000034 method Methods 0.000 title claims description 77
- 238000005530 etching Methods 0.000 claims description 218
- 239000010409 thin film Substances 0.000 claims description 144
- 239000000758 substrate Substances 0.000 claims description 67
- 239000013078 crystal Substances 0.000 claims description 55
- 239000010408 film Substances 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 37
- 230000015572 biosynthetic process Effects 0.000 claims description 33
- 238000005468 ion implantation Methods 0.000 claims description 24
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000011800 void material Substances 0.000 claims description 10
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical group CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 claims description 7
- 238000005304 joining Methods 0.000 claims description 7
- 229910052697 platinum Inorganic materials 0.000 claims description 7
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 6
- 238000004544 sputter deposition Methods 0.000 description 6
- 238000007740 vapor deposition Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000005360 phosphosilicate glass Substances 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052735 hafnium Inorganic materials 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- PSHMSSXLYVAENJ-UHFFFAOYSA-N dilithium;[oxido(oxoboranyloxy)boranyl]oxy-oxoboranyloxyborinate Chemical compound [Li+].[Li+].O=BOB([O-])OB([O-])OB=O PSHMSSXLYVAENJ-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- OBTSLRFPKIKXSZ-UHFFFAOYSA-N lithium potassium Chemical compound [Li].[K] OBTSLRFPKIKXSZ-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-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
- 238000010248 power generation Methods 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
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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
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- 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
- H03H9/173—Air-gaps
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- H10N30/01—Manufacture or treatment
- H10N30/07—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base
- H10N30/072—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base by laminating or bonding of piezoelectric or electrostrictive bodies
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- H10N30/875—Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/56—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
- G01C19/5783—Mountings or housings not specific to any of the devices covered by groups G01C19/5607 - G01C19/5719
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- H—ELECTRICITY
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- 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
- H03H2003/021—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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- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Description
前記圧電薄膜の表面に形成される第2の電極の膜厚をB、
前記エッチング調整層の膜厚をC、
前記第1の電極のエッチングレートをα、
前記第2の電極のエッチングレートをβ、
前記エッチング調整層のエッチングレートをγ、としたとき、
前記調整層形成工程は、
A/α +B/β = C/γ
の式を満たす膜厚と材質で前記エッチング調整層を形成する。
犠牲層が除去された複数の圧電デバイスを個別の圧電デバイスに分割する分割工程を有する。
10 圧電薄膜
100 イオン注入層
20、21、22 下部電極
30、31 犠牲層
40 支持層
41、42 支持層
50 支持基板
60 上部電極
61A、61B バンプパッド
62A、62B バンプ
63A、63B 配線
70 レジスト膜
71、72 エッチング窓
80 空隙層
81 孔部
82、83 開口部
84 孔部
85 空隙層
90、91 エッチング調整層
Claims (15)
- 圧電薄膜と、前記圧電薄膜の裏面に形成された第1の電極と、前記第1の電極の裏面に接合する支持体と、前記第1の電極と前記支持体との間に形成された空隙層とを備える圧電デバイスであって、
前記圧電薄膜に直接又は前記第1の電極を介して導通するよう前記圧電薄膜の一部又は前記第1の電極の一部に接触し、前記第1の電極よりもエッチングレートの低い導電性のエッチング調整層を備え、
前記圧電薄膜には、前記圧電薄膜を貫通して前記空隙層に連通する孔部と、前記エッチング調整層を前記圧電薄膜の表面側に露出させる開口部と、が形成された、圧電デバイス。 - 圧電薄膜と、前記圧電薄膜の裏面に形成された第1の電極と、前記第1の電極の裏面に接合する支持体と、前記第1の電極と前記支持体との間に形成された空隙層とを備える圧電デバイスの製造方法であって、
前記空隙層となる空間に犠牲層を形成する犠牲層形成工程と、
前記第1の電極の表面を正面視したときに前記第1の電極の一部と重なる領域に、前記第1の電極よりもエッチングレートの低い導電性のエッチング調整層を形成する調整層形成工程と、
前記圧電薄膜および前記エッチング調整層をエッチングし、前記犠牲層の一部を前記圧電薄膜の表面側に露出させる孔部と、前記圧電薄膜の一部又は前記第1の電極の一部に接触する前記エッチング調整層または前記第1の電極の一部を前記圧電薄膜の表面側に露出させる開口部とを同時に形成する露出工程と、
前記孔部を介して前記犠牲層を除去する犠牲層除去工程と、
を有する圧電デバイスの製造方法。 - 圧電単結晶基板にイオンを注入することで、イオン注入層を形成するイオン注入工程と、
前記イオン注入層が形成された前記圧電単結晶基板と前記支持体とを接合する接合工程と、
前記圧電単結晶基板から単結晶の前記圧電薄膜を剥離し、単結晶の前記圧電薄膜を前記第1の電極の表面に形成する剥離形成工程と、を有する、請求項2に記載の圧電デバイスの製造方法。 - 前記圧電薄膜の材質は、タンタル酸リチウム又はニオブ酸リチウムである、請求項2または請求項3に記載の圧電デバイスの製造方法。
- 前記調整層形成工程は、前記エッチング調整層を前記圧電薄膜の前記裏面側に形成する、請求項2〜請求項4のいずれかに記載の圧電デバイスの製造方法。
- 前記調整層形成工程は、前記エッチング調整層を前記第1の電極の前記支持体側に形成する、請求項5に記載の圧電デバイスの製造方法。
- 前記調整層形成工程は、前記エッチング調整層を、前記圧電薄膜と前記第1の電極との間に形成する、請求項5に記載の圧電デバイスの製造方法。
- 前記調整層形成工程は、前記エッチング調整層を導電性材料で形成する、請求項5〜請求項7のいずれかに記載の圧電デバイスの製造方法。
- 前記調整層形成工程は、前記エッチング調整層を、前記第1の電極よりエッチングレートの低い材料で形成する、請求項5〜請求項8のいずれかに記載の圧電デバイスの製造方法。
- 前記調整層形成工程は、前記エッチング調整層を、金属材料で形成する、請求項7又は請求項9に記載の圧電デバイスの製造方法。
- 前記調整層形成工程は、前記エッチング調整層を、Al、Cu、Ni、Cr、Ptのいずれかを含む金属材料で形成する、請求項10に記載の圧電デバイスの製造方法。
- 前記調整層形成工程は、前記エッチング調整層を前記圧電薄膜の表面上に形成する、請求項2〜請求項4のいずれかに記載の圧電デバイスの製造方法。
- 前記圧電薄膜の前記裏面に形成される前記第1の電極の膜厚をA、
前記圧電薄膜の表面に形成される第2の電極の膜厚をB、
前記エッチング調整層の膜厚をC、
前記第1の電極のエッチングレートをα、
前記第2の電極のエッチングレートをβ、
前記エッチング調整層のエッチングレートをγ、としたとき、
前記調整層形成工程は、
A/α +B/β = C/γ
の式を満たす膜厚と材質で前記エッチング調整層を形成する、請求項12に記載の圧電デバイスの製造方法。 - 前記調整層形成工程は、膜厚と材質が前記第1の電極および前記第2の電極と等しい前記エッチング調整層を形成する、請求項13に記載の圧電デバイスの製造方法。
- 前記犠牲層除去工程までを、複数の圧電デバイスが同時形成可能なマルチ状態で行い、
前記犠牲層が除去された複数の圧電デバイスを個別の圧電デバイスに分割する分割工程を有する、請求項2〜請求項14のいずれかに記載の圧電デバイスの製造方法。
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KR101856060B1 (ko) | 2011-12-01 | 2018-05-10 | 삼성전자주식회사 | 체적 음향 공진기 |
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US20140231382A1 (en) | 2014-08-21 |
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