JP4921863B2 - 圧電体素子およびインクジェット式記録ヘッド - Google Patents
圧電体素子およびインクジェット式記録ヘッド Download PDFInfo
- Publication number
- JP4921863B2 JP4921863B2 JP2006166229A JP2006166229A JP4921863B2 JP 4921863 B2 JP4921863 B2 JP 4921863B2 JP 2006166229 A JP2006166229 A JP 2006166229A JP 2006166229 A JP2006166229 A JP 2006166229A JP 4921863 B2 JP4921863 B2 JP 4921863B2
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- Prior art keywords
- film
- piezoelectric
- thin film
- width
- pzt
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- 239000010408 film Substances 0.000 claims description 309
- 239000010409 thin film Substances 0.000 claims description 170
- 239000013078 crystal Substances 0.000 claims description 120
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 47
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 21
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 21
- 229910052697 platinum Inorganic materials 0.000 claims description 17
- 239000010936 titanium Substances 0.000 claims description 17
- 238000002441 X-ray diffraction Methods 0.000 claims description 11
- ZBSCCQXBYNSKPV-UHFFFAOYSA-N oxolead;oxomagnesium;2,4,5-trioxa-1$l^{5},3$l^{5}-diniobabicyclo[1.1.1]pentane 1,3-dioxide Chemical group [Mg]=O.[Pb]=O.[Pb]=O.[Pb]=O.O1[Nb]2(=O)O[Nb]1(=O)O2 ZBSCCQXBYNSKPV-UHFFFAOYSA-N 0.000 claims description 9
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 229910003446 platinum oxide Inorganic materials 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052787 antimony Inorganic materials 0.000 claims description 4
- 229910052788 barium Inorganic materials 0.000 claims description 4
- 239000000470 constituent Substances 0.000 claims description 4
- 229910052712 strontium Inorganic materials 0.000 claims description 4
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- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
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- 239000000758 substrate Substances 0.000 description 51
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- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 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 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
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- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 4
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- 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 3
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- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
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- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 2
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- 229940046892 lead acetate Drugs 0.000 description 2
- 229910000464 lead oxide Inorganic materials 0.000 description 2
- UEGPKNKPLBYCNK-UHFFFAOYSA-L magnesium acetate Chemical compound [Mg+2].CC([O-])=O.CC([O-])=O UEGPKNKPLBYCNK-UHFFFAOYSA-L 0.000 description 2
- 235000011285 magnesium acetate Nutrition 0.000 description 2
- 239000011654 magnesium acetate Substances 0.000 description 2
- 229940069446 magnesium acetate Drugs 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910000484 niobium oxide Inorganic materials 0.000 description 2
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 2
- ZTILUDNICMILKJ-UHFFFAOYSA-N niobium(v) ethoxide Chemical compound CCO[Nb](OCC)(OCC)(OCC)OCC ZTILUDNICMILKJ-UHFFFAOYSA-N 0.000 description 2
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- 238000007254 oxidation reaction Methods 0.000 description 2
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
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- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/49—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates containing also titanium oxides or titanates
- C04B35/491—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates containing also titanium oxides or titanates based on lead zirconates and lead titanates, e.g. PZT
- C04B35/493—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates containing also titanium oxides or titanates based on lead zirconates and lead titanates, e.g. PZT containing also other lead compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62625—Wet mixtures
- C04B35/6264—Mixing media, e.g. organic solvents
-
- 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
- H10N30/076—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 vapour phase 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
- H10N30/01—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
- H10N30/20—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
- H10N30/2041—Beam type
- H10N30/2042—Cantilevers, i.e. having one fixed end
-
- 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
-
- 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
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Description
a+b+c=1、
0.10≦a≦0.55、
0.25≦b≦0.55、
0≦c≦0.5、
であることを特徴とする。
B':(50,50,0)
C':(25,25,50)
D':(10,40,50)
E':(10,45,40)
F':(35,45,20)
すなわち、前記圧電体膜を構成するPZT膜が、前記成分から構成されている。
この参考例1においては、まず、シリコン基板10上に下電極12として白金をスパッタ法で形成した。次に、圧電体薄膜14をゾルゲル法により形成した。ゾルは次のように調製した。酢酸鉛0.105モル、ジルコニウムアセチルアセトナート0.045モル、酢酸マグネシウム0.005モルと30ミリリットルの酢酸を、100℃に加熱して溶解させた。
シリコン基板上に下電極として金をスパッタ法で形成した。次に、圧電体薄膜をゾルゲル法により形成した。ゾルは次のように調製した。酢酸鉛0.105モル、ジルコニウムアセチルアセトナート0.030モル、酢酸マグネシウム0.007モルと30ミリリットルの酢酸を、100℃に加熱して溶解させた。
面方位(111)の配向度と、圧電ひずみ定数との関係は、以下の通りである。
50% 80pC/N
70% 120pC/N
90% 150pC/N
既述の参考例1,実施例1では、(100)の配向度が30%であることが好適であると説明した。ここで明らかなように、(111)の配向度を50%以上にすることにより、参考例1,実施例1と同様な電圧ひずみ定数を得て圧電特性を得ることができる。
(ここで、0.40≦X≦0.6,0≦Y≦0.1)
また、スパッタリング法によって、PZT膜を形成する場合の二成分系のPZT膜は、例えば、次の化学式で表わされる組成を有するものである。
(ここで、0.40≦X≦0.6,0≦Y≦0.3)
また、三成分系PZTの好ましい具体例としては、スパッタリング法では、前記二成分系のPZTに、例えば、第三成分(好適には、マグネシウムニオブ酸鉛である。)を添加した以下に示す化学式で表わされる組成を有するものが挙げられる。
(ここで、Aは、Mg,Co,Zn,Cd,Mn及びNiからなる群から選択される2価の金属またはY,Fe,Sc,Yb,Lu,In及びCrからなる群から選択される3価の金属を表す。また、Bは、Nb,Ta及びSbからなる群から選択される5価の金属、またはW及びTeからなる群から選択される6価の金属を表す。また、a,b,cをそれぞれモル比とした場合、a+b+c=1,0.10≦a≦0.55,0.25≦b≦0.55,0≦c≦0.5,0≦e≦0.3,0≦f≦0.15c,g=h=1/2,n=0であるが、但し、Aが3価の金属であり、かつBが6価の金属でなく、また、Aが2価の金属であり、かつBが5価の金属である場合、gは1/3であり、hは2/3であり、また、AはMg、BがNbの場合に限り、nは1を表す。)
三成分系のより好ましい具体例としては、マグネシウムニオブ酸鉛で、AがMgであり、BがNbであり、gが1/3、hが2/3であるものが挙げられる。
次に、この構造を備えた圧電体薄膜素子の製造方法について図面を参照して説明する。図6の(a)から(c)は、前述した圧電体薄膜素子の各製造工程に於ける断面図である。
先ず、特定成分のPZT焼結体をスパッタリングのターゲットとして用い、基板温度を200℃以下とし、Arガス100%雰囲気中で、RFマグネトロンスパッタリングにより、アモルファス、又はパイロクロア相からなるPZT膜の前駆体膜を基板上に形成する。
B:(50,50,0)
C:(25,25,50)
D:(10,40,50)
E:(10,45,40)
F:(35,45,20)
すなわち、10≦a≦50,20≦b≦55,0≦c≦50である。この範囲は、前記(I)式で説明した範囲の好適な範囲である。
この製造方法では、PZT膜を形成可能な金属成分の水酸化物の水和錯体、すなわちゾルを脱水処理してゲルとし、このゲルを加熱焼成して無機酸化物を調整する二つの方法について説明する。これらのゾルゲル法は、先に説明した参考例1及び実施例1とほぼ同様であるが、ここに改めて詳説することとする。
a.ゾル組成物の成膜工程
本参考例において、PZT膜を構成する金属成分のゾルは、PZT膜を形成可能な金属のアルコキシドまたはアセテートを、例えば酸で加水分解して調整することができる。本発明においては、ゾル中の金属の組成を制御することで、既述のPZT膜の組成を得ることができる。すなわち、チタン、ジルコニウム、鉛、さらには他の金属成分のそれぞれのアルコキシドまたはアセテートを出発原料とする。
次に、前述したゾル組成物の成膜工程で得た膜を焼成し、残留有機物を実質的に含まない非晶質の金属酸化物からなる多孔質ゲル薄膜を形成する。
次に、前述した工程bで得た多孔質ゲル薄膜を加熱焼成し、この膜を結晶質の金属酸化膜からなる膜に変換する。焼成は、多孔質ゲル薄膜を結晶質の金属酸化物からなる膜に変換するために必要な温度で行うが、結晶中にペロブスカイト型結晶が大部分を占めるまで行う必要はなく、ゲル薄膜が均一に結晶化された時点で終了させればよい。
次に、前述した工程a、b及びcを少なくとも1回以上繰り返し、結晶質の金属酸化物の膜を積層する。ここで、この繰り返し工程で得られる膜の膜厚、焼成温度、プレアニール条件は、下電極上に第1回の膜を形成した場合と同様である。
次に、工程dで得た膜に、焼成温度600〜1200℃、さらに好ましくは800〜1000℃の範囲でアニールを行う。焼成時間は、焼成温度や、使用する炉の形式によって変化するが、例えば、アニール炉を用いた場合、0.1〜5時間程度が好ましく、0.5〜2時間程度がより好ましい。また、RTA炉を用いた場合には、0.1〜10分程度が好ましく、0.5〜3分程度がより好ましい。
次に、もう一つのゾルゲル法を利用した圧電体薄膜素子の製造方法について説明する。
先ず、前述した工程a及びbを、少なくとも1回以上繰り返し、多孔質ゲル薄膜の積層膜を形成する。なお、工程a及びbにおいて形成される膜厚、焼成温度は、前述した製造工程(その1)に準じる。
次に、工程fで得た積層膜を焼成して、この積層膜を結晶質の金属酸化物からなる膜に変換する。この焼成は、積層膜を結晶質の金属酸化物からなる膜に変換するのに必要な温度で行うが、結晶中にペロブスカイト型結晶が大部分を占めるまで行う必要はなく、ゲル薄膜が均一に結晶化した時点で終了させればよい。また、この焼成の温度及び時間は、工程cとほぼ同じにすればよい。そしてまた、この焼成は、工程cと同様に、二段階に分けて行ってもよい。この工程により、多結晶質ゲル薄膜が複数枚積層された積層膜が、結晶質の薄膜に変換された。
次に、工程f及びc'を、少なくとも1回以上繰り返す。すなわち、この工程では、工程a及びbを少なくとも1回以上繰り返して、多孔質ゲル薄膜の積層膜を形成し、これを焼成して結晶質の金属酸化物からなる膜に変換する工程をさらに1回以上繰り返す。このようにして、結晶質の金属酸化膜からなる膜を複数枚積層した積層膜を形成する。なお、繰り返される工程a、b及びc'における種々の条件は、前述した条件と同様にした。
次に、参考例3に係る圧電体薄膜素子(発明品1)と、PZT膜を構成する結晶体の粒界が下電極の面に対して略垂直方向に存在していない以外は、発明品1と同様の構造を備えた圧電体薄膜素子(比較品1)との圧電ひずみ定数(pC/N)を測定したところ、発明品1の圧電ひずみ定数は、150pC/Nであり、比較品1の圧電ひずみ定数は、100pC/Nであった。
図10は、他の圧電体薄膜素子を構成する下電極の断面を示す走査型電子顕微鏡(SEM)写真である。なお、この参考例4では、既述の参考例3との相違点について説明し、参考例2と同様の構成及び工程に関しては、同一の符号を使用して、その詳細な説明は省略する。
次に、閉気孔(気孔)の径を制御することにより、圧電体薄膜中のクラックの発生を防止するようにした本発明の参考例について説明する。図1の点線部の断面拡大図を図12に示す。この図12に示すように、圧電体膜10中には、気孔20が存在しており、しかもその気孔は、角が丸く、結晶粒内、あるいは、結晶粒と結晶粒の間に、閉じこめられた閉気孔(個々の結晶粒は、図中に記載していない。)であり、その平均気孔径が、0.01〜0.1μmで且つ、面積密度が0.3〜5%である。
参考例5と同様にして、気孔の面積密度を変えて、アクチュエータを作成したところ、圧電体膜中のクラックの発生と上下電極間の電気リークは、表4に示すようになった。
III.次に、以上説明した圧電体薄膜素子を備えたインクジェット記録装置について説明する。このインクジェット式記録ヘッドを模式的に表す断面図を示す。図14は、本発明に係る圧電体薄膜素子を振動子として使用したインクジェット式記録ヘッドの一つのインク溜め部分を示す。
Claims (9)
- 下電極と、
前記下電極上に形成され、少なくともチタンを構成要素として含む多結晶体からなる圧電体薄膜と、
前記圧電体薄膜上に形成された上電極と、を有する圧電体素子であって、
前記圧電体薄膜の結晶粒が、前記下電極から前記上電極方向に延びる柱状であり、前記圧電体薄膜の結晶粒の膜面方向の幅と膜厚方向の幅の関係(膜面方向の幅/膜厚方向の幅)が、1/10〜1/3の範囲であり、
前記下電極は、プラチナおよび前記プラチナの収縮を抑制する酸化チタンを含むと共に、前記圧電体薄膜との密着性を向上させ、
前記下電極の結晶粒は、膜面方向の幅と膜厚方向の幅の関係(膜面方向の幅/膜厚方向の幅)が、1/10〜1/3の範囲であることを特徴とする圧電素子。 - 前記圧電体薄膜の結晶粒は、膜面方向の幅と膜厚方向の幅の関係(膜面方向の幅/膜厚方向の幅)が、1/6〜3/11の範囲であることを特徴とする請求項1に記載の圧電体素子。
- 前記圧電体薄膜は、菱面体晶の結晶構造を有することを特徴とする請求項1又は2に記載の圧電体素子。
- 前記圧電体薄膜は、X線回折薄膜法で測定した(100)、(110)、(111)、(210)および(211)の結晶面反射強度の総和に対する(100)の結晶面反射強度が、30%以上であることを特徴とする請求項3に記載の圧電体素子。
- 前記圧電体薄膜は、PZTから構成されることを特徴とする請求項1乃至4何れか一項に記載の圧電体素子。
- 前記圧電体薄膜は、さらに第三成分を含む三成分系のPZTから構成されることを特徴とする請求項5に記載の圧電体素子。
- 前記第三成分はマグネシウムニオブ酸鉛であることを特徴とする請求項6に記載の圧電体素子。
- 前記圧電体薄膜は、Ba、Sr、La、Nd、Nb、Ta、Sb、Bi、W、Mo、又はCaの何れか1つが添加されていることを特徴とする請求項5乃至7何れか一項に記載の圧電体素子。
- 請求項1乃至8何れか一項に記載の圧電体素子を備えたことを特徴とするインクジェット式記録ヘッド。
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- 1996-09-18 EP EP19990101630 patent/EP0928033B8/en not_active Expired - Lifetime
- 1996-09-18 DE DE69625713T patent/DE69625713T2/de not_active Expired - Lifetime
- 1996-09-19 US US08/716,610 patent/US6097133A/en not_active Expired - Lifetime
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1998
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1999
- 1999-11-01 US US09/431,088 patent/US6294860B1/en not_active Expired - Lifetime
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2006
- 2006-06-15 JP JP2006166231A patent/JP4618196B2/ja not_active Expired - Lifetime
- 2006-06-15 JP JP2006166230A patent/JP4572346B2/ja not_active Expired - Lifetime
- 2006-06-15 JP JP2006166227A patent/JP4424332B2/ja not_active Expired - Lifetime
- 2006-06-15 JP JP2006166228A patent/JP4424333B2/ja not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
US6294860B1 (en) | 2001-09-25 |
JP2006339663A (ja) | 2006-12-14 |
JP4618196B2 (ja) | 2011-01-26 |
DE69625713T2 (de) | 2003-08-07 |
EP0928033B8 (en) | 2003-05-28 |
EP0764992B1 (en) | 2000-08-23 |
DE69625713D1 (de) | 2003-02-13 |
JP2006324681A (ja) | 2006-11-30 |
JP4424333B2 (ja) | 2010-03-03 |
JP2006310877A (ja) | 2006-11-09 |
EP0928034A2 (en) | 1999-07-07 |
EP0928034B1 (en) | 2003-01-08 |
JP3890634B2 (ja) | 2007-03-07 |
US6387225B1 (en) | 2002-05-14 |
DE69623349T2 (de) | 2002-12-19 |
JP2006287254A (ja) | 2006-10-19 |
US6097133A (en) | 2000-08-01 |
JPH1081016A (ja) | 1998-03-31 |
EP0928033B1 (en) | 2002-08-28 |
EP0928033A3 (en) | 1999-08-04 |
JP4572346B2 (ja) | 2010-11-04 |
EP0928034A3 (en) | 1999-08-04 |
DE69609915T2 (de) | 2000-12-21 |
EP0764992A1 (en) | 1997-03-26 |
EP0928033A2 (en) | 1999-07-07 |
DE69609915D1 (de) | 2000-09-28 |
JP2006287255A (ja) | 2006-10-19 |
EP0928034B8 (en) | 2003-05-28 |
EP0764992B8 (en) | 2003-07-02 |
JP4424332B2 (ja) | 2010-03-03 |
DE69623349D1 (de) | 2002-10-02 |
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