JP6967008B2 - 圧電薄膜素子 - Google Patents
圧電薄膜素子 Download PDFInfo
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- JP6967008B2 JP6967008B2 JP2018548361A JP2018548361A JP6967008B2 JP 6967008 B2 JP6967008 B2 JP 6967008B2 JP 2018548361 A JP2018548361 A JP 2018548361A JP 2018548361 A JP2018548361 A JP 2018548361A JP 6967008 B2 JP6967008 B2 JP 6967008B2
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- thin film
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- platinum metal
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- 239000010409 thin film Substances 0.000 title claims description 232
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 199
- 229910052451 lead zirconate titanate Inorganic materials 0.000 claims description 151
- 229910020684 PbZr Inorganic materials 0.000 claims description 59
- 239000000203 mixture Substances 0.000 claims description 59
- 239000002019 doping agent Substances 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 35
- 239000013078 crystal Substances 0.000 claims description 33
- 238000000224 chemical solution deposition Methods 0.000 claims description 23
- 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 claims description 23
- 239000000758 substrate Substances 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 159
- 229910052697 platinum Inorganic materials 0.000 description 67
- 239000010936 titanium Substances 0.000 description 56
- 150000001875 compounds Chemical class 0.000 description 28
- 238000000151 deposition Methods 0.000 description 28
- 230000008021 deposition Effects 0.000 description 26
- 239000002243 precursor Substances 0.000 description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 20
- 229910052710 silicon Inorganic materials 0.000 description 20
- 239000010703 silicon Substances 0.000 description 20
- 238000004544 sputter deposition Methods 0.000 description 19
- 150000002500 ions Chemical class 0.000 description 17
- 239000011572 manganese Substances 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 10
- 239000000126 substance Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000010955 niobium Substances 0.000 description 7
- 239000012790 adhesive layer Substances 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 6
- 229910052761 rare earth metal Inorganic materials 0.000 description 6
- 238000004528 spin coating Methods 0.000 description 6
- 238000002441 X-ray diffraction Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000000197 pyrolysis Methods 0.000 description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 5
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000000137 annealing Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 4
- 229910052741 iridium Inorganic materials 0.000 description 4
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000005546 reactive sputtering Methods 0.000 description 4
- 229910052707 ruthenium Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000007641 inkjet printing Methods 0.000 description 3
- 229910052746 lanthanum Inorganic materials 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910002659 PbMg1/3Nb2/3O3 Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- QAKZFDCCFWBSGH-UHFFFAOYSA-N [Ru].[Sr] Chemical compound [Ru].[Sr] QAKZFDCCFWBSGH-UHFFFAOYSA-N 0.000 description 2
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 229910000457 iridium oxide Inorganic materials 0.000 description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 150000003057 platinum Chemical class 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000004549 pulsed laser deposition Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000002233 thin-film X-ray diffraction Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- 238000010146 3D printing Methods 0.000 description 1
- 241000877463 Lanio Species 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004121 SrRuO Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 238000000089 atomic force micrograph Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229910001195 gallium oxide Inorganic materials 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002493 microarray Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 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
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000002424 x-ray crystallography Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14201—Structure of print heads with piezoelectric elements
- B41J2/14233—Structure of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1607—Production of print heads with piezoelectric elements
- B41J2/161—Production of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
- B41J2/1642—Manufacturing processes thin film formation thin film formation by CVD [chemical vapor deposition]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/07—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base
- H10N30/074—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base by depositing piezoelectric or electrostrictive layers, e.g. aerosol or screen printing
- H10N30/077—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base by depositing piezoelectric or electrostrictive layers, e.g. aerosol or screen printing by liquid phase deposition
- H10N30/078—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base by depositing piezoelectric or electrostrictive layers, e.g. aerosol or screen printing by liquid phase deposition by sol-gel deposition
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/704—Piezoelectric or electrostrictive devices based on piezoelectric or electrostrictive films or coatings
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/853—Ceramic compositions
- H10N30/8548—Lead-based oxides
- H10N30/8554—Lead-zirconium titanate [PZT] based
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14201—Structure of print heads with piezoelectric elements
- B41J2/14233—Structure of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
- B41J2002/14266—Sheet-like thin film type piezoelectric element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/03—Specific materials used
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/06—Forming electrodes or interconnections, e.g. leads or terminals
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
- H10N30/2047—Membrane type
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
- H10N30/877—Conductive materials
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Semiconductor Memories (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Compositions Of Oxide Ceramics (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Description
HT−Pt上でのPZT薄膜配向制御層の形成
白金電極は、アルゴン雰囲気下(流量50sccm)、450℃及び500℃の温度に下から加熱したケイ素基材(ターゲット−基材距離50mm)上に、直径250nm及び厚さ4mmの白金ターゲット(純度99.99%)をRFマグネトロンスパッタリング(500W DCカソード出力にて約1分間)することによって堆積させた。堆積速度は11.8Å/sであり、チャンバー圧力は3.8mTorrであった。
Claims (15)
- 第1の電極、第2の電極、及びそれらの間の1つ以上の圧電薄膜を含む圧電薄膜素子であって、前記第1の電極が、50nmを超える平均結晶粒度を有する白金金属電極であり、前記白金金属電極に隣接している圧電薄膜が、複数の圧電薄膜層を有する積層体を含み、前記白金金属電極に接触している圧電薄膜層が、PbZrxTi1−xO3の組成またはほぼPbZrxTi1−xO3である組成(式中、0<x≦0.60)のジルコン酸チタン酸鉛(PZT)を含み、90%以上の擬立方晶{100}配向度を有する、圧電薄膜素子。
- 前記白金金属電極に接触している前記PZT薄膜層が、PbZrxTi1−xO3の組成またはほぼPbZrxTi1−xO3である組成(式中、0<x≦0.40)を有する、請求項1に記載の圧電薄膜素子。
- 前記白金金属電極が、100nmを超える平均結晶粒度を有する、請求項1または2に記載の圧電薄膜素子。
- 前記白金金属電極に接触している前記PZT薄膜層が、ドナードーパント、アクセプタードーパント、または等原子価ドーパントのうちの1種以上でドーピングされている、請求項1〜3のいずれか1項に記載の圧電薄膜素子。
- 前記白金金属電極に接触している前記PZT薄膜層が、10nm〜200nmの厚さを有する、請求項1〜4のいずれか1項に記載の圧電薄膜素子。
- 前記複数の圧電薄膜層が、前記白金金属電極に接触している前記PZT薄膜層上に形成された、PbZrxTi1−xO3の組成またはほぼPbZrxTi1−xO3である組成(式中、0<x≦0.60)のジルコン酸チタン酸鉛(PZT)を含む1つ以上の圧電薄膜層を含む、請求項1〜5のいずれか1項に記載の圧電薄膜素子。
- 前記複数の圧電薄膜層が、前記白金金属電極に接触している前記PZT薄膜層上に形成された、PbZr0.52Ti0.48O3の組成またはほぼPbZr0.52Ti0.48O3である組成のジルコン酸チタン酸鉛(PZT)を含む1つ以上の圧電薄膜層を含む、請求項1〜6のいずれか1項に記載の圧電薄膜素子。
- 前記白金金属電極に隣接している前記圧電薄膜が、90%以上の擬立方晶{100}配向度を有する、請求項1〜7のいずれか1項に記載の圧電薄膜素子。
- 前記白金金属電極が、優先(111)配向を有する、請求項1〜8のいずれか1項に記載の圧電薄膜素子。
- 第1の電極、第2の電極、及びそれらの間の1つ以上の圧電薄膜を含む圧電薄膜素子を製造する方法であって、450℃または450℃超の所定の温度に加熱した基材上に白金金属電極を形成することと、前記白金金属電極上に、圧電薄膜層の積層体を含む圧電薄膜を形成することとを含み、前記圧電薄膜を形成することは、10mol%〜40mol%の所定の過剰な鉛含有量を有する溶液を使用した化学溶液堆積によって、前記白金金属電極に接触している圧電薄膜層を形成することを含み、これにより、前記白金金属電極に接触している前記圧電薄膜層が、PbZrxTi1−xO3の組成またはほぼPbZrxTi1−xO3である組成(式中、0<x≦0.60)のジルコン酸チタン酸鉛を含み、90%以上の擬立方晶{100}配向度を有する、方法。
- 前記白金金属電極に接触している前記圧電薄膜層を形成することでは、10mol%〜40mol%の所定の過剰な鉛含有量を有する溶液を使用し、これにより、前記白金金属電極に接触している前記圧電薄膜層が、PbZrxTi1−xO3の組成またはほぼPbZrxTi1−xO3である組成(式中、0<x≦0.40)のジルコン酸チタン酸鉛を含む、請求項10に記載の方法。
- 前記化学溶液堆積では、12mol%〜20mol%の所定の過剰な鉛含有量を有する溶液を使用する、請求項10または請求項11に記載の方法。
- 前記化学溶液堆積では、前記白金金属電極に接触している前記圧電薄膜層中にドナードーパント、アクセプタードーパント、または等原子価ドーパントのうちの1種以上をもたらす溶液を使用する、請求項10〜12のいずれか1項に記載の方法。
- 前記白金金属電極に接触している前記PZT薄膜層上に、化学溶液堆積によって、PbZrxTi1−xO3の組成またはほぼPbZrxTi1−xO3である組成(式中、0<x≦0.60)のジルコン酸チタン酸鉛(PZT)を含む1つ以上の圧電薄膜層を形成することをさらに含み、これにより、前記圧電薄膜が、90%以上の擬立方晶{100}配向度を有する、請求項10〜13のいずれか1項に記載の方法。
- 前記白金金属電極に接触している前記PZT薄膜層上に、化学溶液堆積によって、PbZrxTi1−xO3の組成またはほぼPbZrxTi1−xO3である組成(式中、0.40≦x≦0.60)のジルコン酸チタン酸鉛(PZT)を含む1つ以上の圧電薄膜層を形成することをさらに含み、これにより、前記圧電薄膜が、90%以上の擬立方晶{100}配向度を有する、請求項10〜14のいずれか1項に記載の方法。
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