JP7635889B2 - 積層セラミックコンデンサ - Google Patents
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 description 34
- 239000000919 ceramic Substances 0.000 claims description 73
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 33
- 229910052802 copper Inorganic materials 0.000 claims description 32
- 239000010949 copper Substances 0.000 claims description 32
- 241000627951 Osteobrama cotio Species 0.000 claims description 24
- 229910002976 CaZrO3 Inorganic materials 0.000 claims description 12
- 229910002370 SrTiO3 Inorganic materials 0.000 claims description 11
- 229910002113 barium titanate Inorganic materials 0.000 claims description 11
- 239000000843 powder Substances 0.000 description 67
- 239000002184 metal Substances 0.000 description 25
- 229910052751 metal Inorganic materials 0.000 description 25
- 239000002002 slurry Substances 0.000 description 24
- 239000002994 raw material Substances 0.000 description 18
- 239000003960 organic solvent Substances 0.000 description 12
- 239000002270 dispersing agent Substances 0.000 description 11
- 239000002923 metal particle Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 9
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- UODXCYZDMHPIJE-UHFFFAOYSA-N menthanol Chemical compound CC1CCC(C(C)(C)O)CC1 UODXCYZDMHPIJE-UHFFFAOYSA-N 0.000 description 8
- 229910019096 CoTiO3 Inorganic materials 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 229910002367 SrTiO Inorganic materials 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920006318 anionic polymer Polymers 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 238000007606 doctor blade method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052712 strontium Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 2
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 2
- 229910052688 Gadolinium Inorganic materials 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229920001249 ethyl cellulose Polymers 0.000 description 2
- 235000019325 ethyl cellulose Nutrition 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- NLQFUUYNQFMIJW-UHFFFAOYSA-N dysprosium(III) oxide Inorganic materials O=[Dy]O[Dy]=O NLQFUUYNQFMIJW-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/46—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 titanium oxides or titanates
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- C04B35/465—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 titanium oxides or titanates based on titanates based on alkaline earth metal titanates
- C04B35/468—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 titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
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Description
次に、この発明による効果を確認するために実施した実験例について説明する。
1.誘電体層を構成するBaTiO3系セラミック原料の作製
出発原料として、主成分のBaCO3およびTiO2の各粉末を秤量し、ボールミルにより72時間混合した後、トップ温度1000℃で2時間熱処理し、熱処理粉末を得た。他方、副成分として、MnO、Dy2O3、MgO、SiO2およびBaCO3の各粉末を用意し、上記熱処理粉末に対し、副成分粉末が、100BaTiO3+0.5Mn+1.0Dy+1.0Mg+1.0Si+2.0Baの組成比となるように秤量し、これら副成分粉末を上記熱処理粉末に加えてボールミルにより24時間混合した後、乾燥させ、BaTiO3系セラミック原料粉末を得た。
後掲の表2に示す「ABO3酸化物」の粉末と上記誘電体層のためのBaTiO3系セラミック原料粉末とを、内部電極形成用導電性ペーストに含まれるセラミック粉末として用いた。
上記1で作製されたBaTiO3系セラミック原料粉末を含むセラミックスラリーを作製し、次いで、セラミックスラリーにドクターブレード法を適用して、セラミックグリーンシートを成形した。次いで、複数のセラミックグリーンシートのうち所定のセラミックグリーンシート上に、上記2で作製された内部電極形成用導電性ペーストをスクリーン印刷により塗布した。次いで、複数のセラミックグリーンシートを積層した後に圧着して、生の積層体を得た。次いで、生の積層体を焼成した。その後、焼結した積層体の端面に外部電極を形成し、試料となる積層セラミックコンデンサを作製した。
表2の試料1~6は、「評価」が「○」である。これら試料1~6では、内部電極がABO3酸化物としてCuTiO3、CoTiO3およびCrTiO3のいずれかを含んでいる。また、内部電極は、導電成分として、銅を含んでいる。
1.誘電体層を構成するCaZrO3系セラミック原料の作製
出発原料として、主成分のCaCO3およびZrO2の各粉末、ならびに副成分のMnO、SiO2およびMgOの各粉末を秤量し、ボールミルにより72時間混合した後、トップ温度1000℃で2時間熱処理し、CaZrO3系セラミック原料粉末を得た。
後掲の表3に示す「ABO3酸化物」の粉末と上記誘電体層のためのCaZrO3系セラミック原料粉末とを、内部電極形成用導電性ペーストに含まれるセラミック粉末として用いた。
上記1で作製されたCaZrO3系セラミック原料粉末を含むセラミックスラリーを作製し、次いで、セラミックスラリーにドクターブレード法を適用して、セラミックグリーンシートを成形した。以後、実験例1の場合と同様の工程を経て、試料となる積層セラミックコンデンサを作製した。
表3の試料11~16は、「評価」が「○」である。これら試料11~16では、内部電極がABO3酸化物としてCuTiO3、CoTiO3およびCrTiO3のいずれかを含んでいる。また、内部電極は、導電成分として、銅を含んでいる。
1.誘電体層を構成するSrTiO3系セラミック原料の作製
出発原料として、主成分のSrCO3およびTiO2の各粉末、ならびに副成分のMnO、SiO2およびMgOの各粉末を秤量し、ボールミルにより72時間混合した後、トップ温度1000℃で2時間熱処理し、SrTiO3系セラミック原料粉末を得た。
後掲の表4に示す「ABO3酸化物」の粉末と上記誘電体層のためのSrTiO3系セラミック原料粉末とを、内部電極形成用導電性ペーストに含まれるセラミック粉末として用いた。
上記1で作製されたSrTiO3系セラミック原料粉末を含むセラミックスラリーを作製し、次いで、セラミックスラリーにドクターブレード法を適用して、セラミックグリーンシートを成形した。以後、実験例1の場合と同様の工程を経て、試料となる積層セラミックコンデンサを作製した。
表4の試料21~26は、「評価」が「○」である。これら試料21~26では、内部電極がABO3酸化物としてCuTiO3、CoTiO3およびCrTiO3のいずれかを含んでいる。また、内部電極は、導電成分として、銅を含んでいる。
セラミックからなる積層された複数の誘電体層と、前記誘電体層間の複数の界面に沿ってそれぞれ配置された複数の内部電極と、を有する、積層体を備え、
前記内部電極は、CuTiO3、CoTiO3およびCrTiO3から選ばれる少なくとも1種を含む、
積層セラミックコンデンサ。
前記内部電極は、導電成分として銅を含む、<1>に記載の積層セラミックコンデンサ。
前記内部電極は、1μm以下の厚みを有する、<1>または<2>に記載の積層セラミックコンデンサ。
前記内部電極は、80%以上のカバレージを有する、<1>ないし<3>のいずれかに記載の積層セラミックコンデンサ。
前記誘電体層は、BaTiO3、SrTiO3およびCaZrO3から選ばれる少なくとも1種を主成分とするセラミックからなり、前記内部電極は、前記誘電体層に含まれるBaTiO3、SrTiO3およびCaZrO3から選ばれる少なくとも1種をさらに含む、<1>ないし<4>のいずれかに記載の積層セラミックコンデンサ。
2 積層体
3 誘電体層
4,5 内部電極
6,7 外部電極
Claims (5)
- セラミックからなる積層された複数の誘電体層と、前記誘電体層間の複数の界面に沿ってそれぞれ配置された複数の内部電極と、を有する、積層体を備え、
前記内部電極は、CuTiO3、CoTiO3およびCrTiO3から選ばれる少なくとも1種を含む、
積層セラミックコンデンサ。 - 前記内部電極は、導電成分として銅を含む、請求項1に記載の積層セラミックコンデンサ。
- 前記内部電極は、1μm以下の厚みを有する、請求項1に記載の積層セラミックコンデンサ。
- 前記内部電極は、80%以上のカバレージを有する、請求項1ないし3のいずれかに記載の積層セラミックコンデンサ。
- 前記誘電体層は、BaTiO3、SrTiO3およびCaZrO3から選ばれる少なくとも1種を主成分とするセラミックからなり、前記内部電極は、前記誘電体層に含まれるBaTiO3、SrTiO3およびCaZrO3から選ばれる少なくとも1種をさらに含む、請求項1ないし3のいずれかに記載の積層セラミックコンデンサ。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022102290 | 2022-06-26 | ||
| JP2022102290 | 2022-06-26 | ||
| PCT/JP2023/017696 WO2024004394A1 (ja) | 2022-06-26 | 2023-05-11 | 積層セラミックコンデンサ |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPWO2024004394A1 JPWO2024004394A1 (ja) | 2024-01-04 |
| JPWO2024004394A5 JPWO2024004394A5 (ja) | 2024-07-26 |
| JP7635889B2 true JP7635889B2 (ja) | 2025-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2024530348A Active JP7635889B2 (ja) | 2022-06-26 | 2023-05-11 | 積層セラミックコンデンサ |
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| Country | Link |
|---|---|
| US (1) | US12412700B2 (ja) |
| JP (1) | JP7635889B2 (ja) |
| KR (1) | KR20250002675A (ja) |
| CN (1) | CN118901112A (ja) |
| WO (1) | WO2024004394A1 (ja) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001284162A (ja) | 2000-03-31 | 2001-10-12 | Kyocera Corp | 導電性ペーストおよび積層型電子部品並びにその製法 |
| JP2013214698A (ja) | 2012-04-02 | 2013-10-17 | Samsung Electro-Mechanics Co Ltd | 内部電極用導電性ペースト組成物及びそれを含む積層セラミック電子部品 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3838071A (en) * | 1972-06-30 | 1974-09-24 | Du Pont | High adhesion silver-based metallizations |
| JP3877214B2 (ja) | 2003-09-30 | 2007-02-07 | Tdk株式会社 | 積層型電子部品および積層型電子部品の製造方法 |
| TW200616920A (en) * | 2004-09-01 | 2006-06-01 | Tdk Corp | Glass composition for thick-film resistor paste, thick-film resistor paste, thick-film resistor, and electronic device |
| JP2015083714A (ja) * | 2013-09-18 | 2015-04-30 | 株式会社村田製作所 | 複合粉末の製造方法およびこの製造方法により得られた複合粉末を用いた導電性厚膜ペーストおよび積層セラミック電子部品 |
| JP2016031807A (ja) | 2014-07-28 | 2016-03-07 | 住友金属鉱山株式会社 | 導電性ペースト及びその製造方法 |
| JP6437270B2 (ja) | 2014-10-21 | 2018-12-12 | 株式会社クラレ | ビニルアセタール系重合体樹脂組成物並びにそれを用いたフィルム、セラミックグリーンシート及び積層体 |
| JP6823976B2 (ja) | 2016-09-06 | 2021-02-03 | 太陽誘電株式会社 | 積層セラミックコンデンサおよびその製造方法 |
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- 2023-05-11 WO PCT/JP2023/017696 patent/WO2024004394A1/ja not_active Ceased
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001284162A (ja) | 2000-03-31 | 2001-10-12 | Kyocera Corp | 導電性ペーストおよび積層型電子部品並びにその製法 |
| JP2013214698A (ja) | 2012-04-02 | 2013-10-17 | Samsung Electro-Mechanics Co Ltd | 内部電極用導電性ペースト組成物及びそれを含む積層セラミック電子部品 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118901112A (zh) | 2024-11-05 |
| US20240222014A1 (en) | 2024-07-04 |
| JPWO2024004394A1 (ja) | 2024-01-04 |
| US12412700B2 (en) | 2025-09-09 |
| KR20250002675A (ko) | 2025-01-07 |
| WO2024004394A1 (ja) | 2024-01-04 |
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