JPWO2008099680A1 - 抵抗ペーストおよび積層セラミックコンデンサ - Google Patents
抵抗ペーストおよび積層セラミックコンデンサ Download PDFInfo
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- 239000003985 ceramic capacitor Substances 0.000 title claims abstract description 58
- 238000000280 densification Methods 0.000 claims abstract description 124
- 229910052751 metal Inorganic materials 0.000 claims abstract description 64
- 239000002184 metal Substances 0.000 claims abstract description 64
- 230000001737 promoting effect Effects 0.000 claims abstract description 58
- 239000000203 mixture Substances 0.000 claims abstract description 30
- 239000011521 glass Substances 0.000 claims abstract description 26
- 230000009471 action Effects 0.000 claims abstract description 21
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 15
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 15
- 239000000919 ceramic Substances 0.000 claims description 52
- 239000002131 composite material Substances 0.000 claims description 22
- 230000002401 inhibitory effect Effects 0.000 claims description 22
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 17
- 238000010304 firing Methods 0.000 claims description 16
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 15
- 229910052758 niobium Inorganic materials 0.000 claims description 14
- 230000001629 suppression Effects 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 229910052738 indium Inorganic materials 0.000 claims 1
- 150000002739 metals Chemical class 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 99
- 239000000843 powder Substances 0.000 description 22
- 238000006467 substitution reaction Methods 0.000 description 17
- 238000012360 testing method Methods 0.000 description 15
- 238000007747 plating Methods 0.000 description 14
- 239000004020 conductor Substances 0.000 description 11
- 229910006404 SnO 2 Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910000990 Ni alloy Inorganic materials 0.000 description 5
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000804 electron spin resonance spectroscopy Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
Description
2,22 セラミック層
3,23 セラミック積層体
4,5,26,27 内部電極
6,7,28,29 外部電極
8,30 抵抗電極層
9 めっき電極層
12 焼付け電極層
24,25 ビア導体
31 導電電極層
後で実験例1〜5について説明するが、まず、これら実験例1〜5に共通する条件について以下に説明する。
実験例1では、抵抗ペーストにおいて、ITOの一部を、表1に示すように、Ni、Cu、Mo、NbおよびCrの各々で置換した場合について評価した。
実験例2では、抵抗ペーストにおいて、ITOの一部を、表2に示すように、Al2O3、TiO2、ZrO2およびZnO2の各々で置換した場合について評価した。
実験例3では、抵抗ペーストにおいて、ITOの一部を、表3〜表8に示すように、実験例1で評価した緻密化促進金属としてのNiおよびCuで置換するとともに、緻密化抑制金属としてのMo、CrおよびNbで置換することによって、緻密化を制御した場合について評価した。
実験例4では、抵抗ペーストにおいて、ITOの一部を、表9〜表12に示すように、実験例2で評価した緻密化促進酸化物としてのAl2O3およびTiO2で置換するとともに、緻密化抑制酸化物としてのZrO2およびZnO2で置換することによって、緻密化を制御した場合について評価した。
実験例5では、実験例3において評価したITOを緻密化促進/抑制金属で置換した低抵抗ペーストと実験例4において評価したITOを緻密化促進/抑制酸化物で置換した高抵抗ペーストとを混合することにより、抵抗ペーストの焼結体の比抵抗、すなわち積層セラミックコンデンサのESRを容易に調整できることを確認した。
Claims (6)
- In−Sn複合酸化物とガラスフリットと有機ビヒクルとを含む、抵抗ペーストであって、
当該抵抗ペーストを焼成して得られる焼結体の緻密化を促進する作用を有する緻密化促進金属としてのNiおよびCuから選ばれる少なくとも1種と、前記緻密化を抑制する作用を有する緻密化抑制金属としてのMo、CrおよびNbから選ばれる少なくとも1種とをさらに含む、抵抗ペースト。 - In−Sn複合酸化物とガラスフリットと有機ビヒクルとを含む、抵抗ペーストであって、
前記In−Sn複合酸化物(ITO)と、当該抵抗ペーストを焼成して得られる焼結体の緻密化を促進する作用を有する緻密化促進金属(Mp)としてのNiおよびCuから選ばれる少なくとも1種と、前記緻密化を抑制する作用を有する緻密化抑制金属(Mc)としてのMo、CrおよびNbから選ばれる少なくとも1種との組成比(ITO,Mp,Mc)を体積%で表したとき、添付の図5において、点A(95,5,0)、点B(92.5,5,2.5)、点C(55,30,15)、点D(50,40,10)、および点E(70,30,0)を結ぶ多角形で囲まれた領域(ただし、線分AB、BC、CD、DEおよびEA上も含む。)にある組成比をもって、前記緻密化促進金属と前記緻密化抑制金属とをさらに含む、抵抗ペースト。 - In−Sn複合酸化物とガラスフリットと有機ビヒクルとを含む、抵抗ペーストであって、
当該抵抗ペーストを焼成して得られる焼結体の緻密化を促進する作用を有する緻密化促進酸化物としてのAl2O3およびTiO2から選ばれる少なくとも1種と、前記緻密化を抑制する作用を有する緻密化抑制酸化物としてのZrO2およびZnO2から選ばれる少なくとも1種とをさらに含む、抵抗ペースト。 - In−Sn複合酸化物とガラスフリットと有機ビヒクルとを含む、抵抗ペーストであって、
前記In−Sn複合酸化物(ITO)と、当該抵抗ペーストを焼成して得られる焼結体の緻密化を促進する作用を有する緻密化促進酸化物(Op)としてのAl2O3およびTiO2から選ばれる少なくとも1種と、前記緻密化を抑制する作用を有する緻密化抑制酸化物(Oc)としてのZrO2およびZnO2から選ばれる少なくとも1種との組成比(ITO,Op,Oc)を体積%で表したとき、添付の図6において、点F(78,22,0)、点G(68,22,10)、点H(55,30,15)、点K(50,40,10)、および点L(70,30,0)を結ぶ多角形で囲まれた領域(ただし、線分FG、GH、HK、KLおよびLF上も含む。)にある組成比をもって、前記緻密化促進酸化物と前記緻密化抑制酸化物とをさらに含む、抵抗ペースト。 - 請求項1または2に記載の抵抗ペーストと請求項3または4に記載の抵抗ペーストとを混合した、抵抗ペースト。
- 複数のセラミック層が積層されてなる、セラミック積層体と、
前記セラミック積層体の内部に形成された、内部電極と、
前記セラミック積層体の外表面上に形成されかつ前記内部電極の特定のものと電気的に接続された、外部電極と
を備え、
前記外部電極は、抵抗電極層と前記抵抗電極層上に形成される導電電極層とを備え、
前記抵抗電極層は、請求項1ないし5のいずれかに記載の抵抗ペーストの焼結体からなる、
積層セラミックコンデンサ。
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