KR20020060614A - 비환원성 유전체 세라믹 및 그를 이용한 세라믹 전자 부품 - Google Patents
비환원성 유전체 세라믹 및 그를 이용한 세라믹 전자 부품 Download PDFInfo
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- KR20020060614A KR20020060614A KR1020020001486A KR20020001486A KR20020060614A KR 20020060614 A KR20020060614 A KR 20020060614A KR 1020020001486 A KR1020020001486 A KR 1020020001486A KR 20020001486 A KR20020001486 A KR 20020001486A KR 20020060614 A KR20020060614 A KR 20020060614A
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- pyrochlore
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- 239000000919 ceramic Substances 0.000 title claims abstract description 135
- 230000001603 reducing effect Effects 0.000 claims abstract description 60
- 239000010949 copper Substances 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 12
- 238000002441 X-ray diffraction Methods 0.000 claims abstract description 10
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 6
- 239000013078 crystal Substances 0.000 claims description 76
- 239000004020 conductor Substances 0.000 claims description 36
- 229910000906 Bronze Inorganic materials 0.000 claims description 26
- 239000010974 bronze Substances 0.000 claims description 26
- 239000003985 ceramic capacitor Substances 0.000 claims description 19
- 239000011521 glass Substances 0.000 claims description 8
- 230000008859 change Effects 0.000 abstract description 19
- 239000012298 atmosphere Substances 0.000 abstract description 11
- 230000007935 neutral effect Effects 0.000 abstract description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 2
- 229910052721 tungsten Inorganic materials 0.000 abstract 2
- 239000010937 tungsten Substances 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 16
- 238000010304 firing Methods 0.000 description 12
- 238000009413 insulation Methods 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 101100513612 Microdochium nivale MnCO gene Proteins 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000010344 co-firing Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000005260 alpha ray Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
-
- 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
- C04B35/46—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
- C04B35/462—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
-
- 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
- C04B35/46—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
- C04B35/462—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
- 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
-
- 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
- C04B35/46—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
- C04B35/462—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
- 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
- C04B35/4682—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 based on BaTiO3 perovskite phase
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
- H01G4/1218—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates
- H01G4/1227—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates based on alkaline earth titanates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/129—Ceramic dielectrics containing a glassy phase, e.g. glass ceramic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/40—Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Capacitors (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
Description
Claims (13)
- 적어도 Ba, RE 및 Ti를 포함하는 텅스텐-청동(tungsten-bronze) 결정상: 및적어도 RE 및 Ti를 포함하는 파이로클로(pyrochlore) 결정상; 을 포함하고,상기 RE는 적어도 하나의 희토류 원소이고, X 선 회절에 의해 결정되는, a는 상기 텅스텐-청동 결정상에 할당된 최대 정점 강도이고, b는 상기 파이로클로 결정상에 할당된 최대 정점 강도일 때, 0.10 ≤b/(a+b) ≤0.90인 것을 특징으로 하는 비환원성 유전체 세라믹.
- 제 1항에 있어서, 상기 텅스텐-청동 결정상 및 상기 파이로클로 결정상이 주성분을 구성하고, 부성분으로서상기 주성분 중 Ti 100몰에 상대적인 Mn의 약 3 ~ 35몰;상기 주성분 100 중량부에 상대적인 B2O3를 포함하는 유리의 약 3 ~ 25중량부;상기 주성분 중 Ti 100몰에 상대적인 Cu의 0 ~ 약 25몰; 및상기 주성분 중 Ti 100몰에 상대적인 V의 0 ~ 약 25몰; 을 더 포함하는 것을 특징으로 하는 비환원성 유전체 세라믹.
- 제 2항에 있어서, 상기 텅스텐-청동 결정상은 BaNd2Ti4O12결정상 및BaNd2Ti5O14결정상 중 적어도 하나인 것을 특징으로 하는 비환원성 유전체 세라믹.
- 제 3항에 있어서, 상기 파이로클로 결정상은 Nd2Ti2O7결정상인 것을 특징으로 하는 비환원성 유전체 세라믹.
- 제 2항에 있어서, 상기 파이로클로 결정상은 Nd2Ti2O7결정상인 것을 특징으로 하는 비환원성 유전체 세라믹.
- 제 1항에 있어서, 상기 텅스텐-청동 결정상은 BaNd2Ti4O12결정상 및 BaNd2Ti5O14결정상 중 적어도 하나인 것을 특징으로 하는 비환원성 유전체 세라믹.
- 제 1항에 있어서, 파이로클로 결정상은 Nd2Ti2O7결정상인 것을 특징으로 하는 비환원성 유전체 세라믹.
- 제 1항에 따른 비환원성 유전체 세라믹을 포함하는 전자 부품체; 및상기 비환원성 유전체 세라믹과 접촉하는 도체; 를 포함하는 것을 특징으로 하는 세라믹 전자 부품.
- 제 8항에 있어서, 상기 도체는 단일 구리 및 구리 합금 중 하나를 포함하는 것을 특징으로 하는 세라믹 전자 부품.
- 제 1항에 따른 비환원성 유전체 세라믹을 포함하는 복수의 유전체 세라믹층; 및사이에 적어도 하나의 유전체 세라믹층을 가지고 내부 전극들로서 배치된 적어도 한 쌍의 도체; 를 포함하는 것을 특징으로 하는 모놀리식(monolithic) 세라믹 커패시터.
- 제 10항에 있어서, 상기 내부 전극들은 단일 구리 및 구리 합금 중 하나를 포함하는 것을 특징으로 하는 모놀리식 세라믹 커패시터.
- 제 1항에 따른 비환원성 유전체 세라믹을 포함하는 복수의 유전체 세라믹층들; 및상기 유전체 세라믹층들 내부에 인덕턴스 및 커패시턴스를 형성하는 내부 전극으로서 배치된 복수의 도체들; 을 포함하는 것을 특징으로 하는 모놀리식 LC 필터.
- 제 12항에 있어서, 상기 내부 전극들은 단일 구리 및 구리 합금 중 하나를 포함하는 것을 특징으로 하는 모놀리식 LC 필터.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPJP-P-2001-00002261 | 2001-01-10 | ||
JP2001002261A JP2002211975A (ja) | 2001-01-10 | 2001-01-10 | 非還元性誘電体セラミック、セラミック電子部品および積層セラミックコンデンサ |
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KR20020060614A true KR20020060614A (ko) | 2002-07-18 |
KR100417304B1 KR100417304B1 (ko) | 2004-02-05 |
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KR10-2002-0001486A KR100417304B1 (ko) | 2001-01-10 | 2002-01-10 | 비환원성 유전체 세라믹 및 그를 이용한 세라믹 전자 부품 |
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US (1) | US6599855B2 (ko) |
JP (1) | JP2002211975A (ko) |
KR (1) | KR100417304B1 (ko) |
CN (2) | CN1306524C (ko) |
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US20090258247A1 (en) * | 2008-04-11 | 2009-10-15 | Siemens Power Generation, Inc. | Anisotropic Soft Ceramics for Abradable Coatings in Gas Turbines |
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JP2003152490A (ja) * | 2001-11-16 | 2003-05-23 | Murata Mfg Co Ltd | 積層型lc複合部品 |
JP2004303947A (ja) * | 2003-03-31 | 2004-10-28 | Matsushita Electric Ind Co Ltd | 複合電子部品 |
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JP4553301B2 (ja) * | 2004-10-18 | 2010-09-29 | 双信電機株式会社 | 誘電体磁器組成物および電子部品 |
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JP2007197277A (ja) * | 2006-01-27 | 2007-08-09 | Kyocera Corp | 誘電体磁器組成物および誘電体磁器、ならびにemiフィルタ |
DE102006035204B4 (de) * | 2006-07-29 | 2009-10-15 | Atmel Duisburg Gmbh | Monolithisch integrierbare Schaltungsanordnung |
EP2513012B1 (en) | 2009-12-16 | 2016-10-12 | Skyworks Solutions, Inc. | Dielectric ceramic materials and associated methods |
CN102336569A (zh) * | 2010-07-28 | 2012-02-01 | 游钦禄 | 超低损耗微波介质陶瓷制备方法及在射频/微波电容器中的应用 |
CN102543430A (zh) * | 2012-01-12 | 2012-07-04 | 西安交通大学 | 焦绿石薄膜多层陶瓷电容器及其低温制备方法 |
US8685545B2 (en) | 2012-02-13 | 2014-04-01 | Siemens Aktiengesellschaft | Thermal barrier coating system with porous tungsten bronze structured underlayer |
JP5835012B2 (ja) | 2012-02-29 | 2015-12-24 | Tdk株式会社 | 誘電体磁器組成物および電子部品 |
CN103467097A (zh) * | 2013-08-29 | 2013-12-25 | 中国人民解放军国防科学技术大学 | 温度稳定型高介电常数微波介质陶瓷及其制备方法 |
KR101606978B1 (ko) * | 2014-04-21 | 2016-03-28 | 삼성전기주식회사 | 유전체 자기 조성물 및 이를 포함하는 적층 세라믹 커패시터 |
KR102171677B1 (ko) * | 2015-01-05 | 2020-10-29 | 삼성전기주식회사 | 유전체 자기 조성물, 유전체 재료 및 이를 포함하는 적층 세라믹 커패시터 |
US10315959B2 (en) | 2016-09-29 | 2019-06-11 | Skyworks Solutions, Inc. | Temperature compensated dielectric material |
JP7036022B2 (ja) | 2016-10-17 | 2022-03-15 | 昭栄化学工業株式会社 | セラミック電子部品用誘電体磁器組成物及びセラミック電子部品 |
KR20200141465A (ko) | 2018-04-11 | 2020-12-18 | 쇼에이 가가쿠 가부시키가이샤 | 유전체 자기 조성물 및 세라믹 전자 부품 |
EP3778531A4 (en) | 2018-04-11 | 2022-04-27 | Shoei Chemical Inc. | DIELECTRIC CERAMIC COMPOSITION AND CERAMIC ELECTRONIC COMPONENT |
CN108929109B (zh) * | 2018-06-28 | 2021-01-05 | 北京智罗盘智能电气有限公司 | 一种具有npo特性的高压陶瓷电容器材料及其制备方法 |
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JPS5520602A (en) | 1978-06-22 | 1980-02-14 | Mitsubishi Electric Corp | Dehydrator for sludge |
JPH07172912A (ja) * | 1993-11-04 | 1995-07-11 | Tokin Corp | 誘電体磁器材料 |
JP3450913B2 (ja) | 1993-12-02 | 2003-09-29 | 京セラ株式会社 | 誘電体磁器組成物 |
JP3531289B2 (ja) * | 1995-05-15 | 2004-05-24 | 大研化学工業株式会社 | マイクロ波誘電体磁器組成物 |
DE69701294T2 (de) * | 1996-03-08 | 2000-07-06 | Murata Mfg. Co., Ltd. | Keramisches Dielektrikum und dieses verwendendes monolithisches keramisches Elektronikbauteil |
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JP2000040636A (ja) | 1998-07-23 | 2000-02-08 | Taiyo Yuden Co Ltd | セラミックス電子部品 |
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JP2000243138A (ja) * | 1999-02-17 | 2000-09-08 | Daiken Kagaku Kogyo Kk | マイクロ波誘電体磁器組成物 |
US6441559B1 (en) * | 2000-04-28 | 2002-08-27 | Motorola, Inc. | Field emission display having an invisible spacer and method |
DE10035172B4 (de) * | 2000-07-19 | 2004-09-16 | Epcos Ag | Keramikmasse und Kondensator mit der Keramikmasse |
-
2001
- 2001-01-10 JP JP2001002261A patent/JP2002211975A/ja active Pending
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2002
- 2002-01-03 US US10/033,855 patent/US6599855B2/en not_active Expired - Lifetime
- 2002-01-10 CN CNB200510003977XA patent/CN1306524C/zh not_active Expired - Lifetime
- 2002-01-10 CN CN02101614A patent/CN1365121A/zh active Pending
- 2002-01-10 KR KR10-2002-0001486A patent/KR100417304B1/ko active IP Right Grant
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US20020132127A1 (en) | 2002-09-19 |
CN1632884A (zh) | 2005-06-29 |
CN1306524C (zh) | 2007-03-21 |
CN1365121A (zh) | 2002-08-21 |
JP2002211975A (ja) | 2002-07-31 |
KR100417304B1 (ko) | 2004-02-05 |
US6599855B2 (en) | 2003-07-29 |
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