JP4936087B2 - 積層正特性サーミスタ - Google Patents
積層正特性サーミスタ Download PDFInfo
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- JP4936087B2 JP4936087B2 JP2009509037A JP2009509037A JP4936087B2 JP 4936087 B2 JP4936087 B2 JP 4936087B2 JP 2009509037 A JP2009509037 A JP 2009509037A JP 2009509037 A JP2009509037 A JP 2009509037A JP 4936087 B2 JP4936087 B2 JP 4936087B2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
- H01C7/022—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient mainly consisting of non-metallic substances
- H01C7/023—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient mainly consisting of non-metallic substances containing oxides or oxidic compounds, e.g. ferrites
- H01C7/025—Perovskites, e.g. titanates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
- H01C7/021—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient formed as one or more layers or coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/18—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material comprising a plurality of layers stacked between terminals
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
- C04B2235/6025—Tape casting, e.g. with a doctor blade
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/652—Reduction treatment
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6582—Hydrogen containing atmosphere
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/661—Multi-step sintering
- C04B2235/662—Annealing after sintering
- C04B2235/663—Oxidative annealing
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/77—Density
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/79—Non-stoichiometric products, e.g. perovskites (ABO3) with an A/B-ratio other than 1
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- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
- C04B2237/32—Ceramic
- C04B2237/34—Oxidic
- C04B2237/345—Refractory metal oxides
- C04B2237/346—Titania or titanates
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- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/58—Forming a gradient in composition or in properties across the laminate or the joined articles
- C04B2237/586—Forming a gradient in composition or in properties across the laminate or the joined articles by joining layers or articles of the same composition but having different densities
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Thermistors And Varistors (AREA)
Description
3a〜3e 半導体セラミック層
4a〜4d 内部電極
5 保護層
6 有効層
Claims (4)
- 主成分がBaTiO3で形成されると共に半導体化剤を含有した半導体セラミック層と、内部電極とが交互に複数積層され、かつ最外層が半導体セラミック層で形成されたセラミック素体を有し、
前記最外層が保護層となる第1のセラミック部を形成し、
さらに、前記セラミック素体の厚み方向の最外に位置する内部電極層に挟まれた複数の前記半導体セラミック層を有効層とすると共に、少なくとも前記有効層を含む半導体セラミック層で第2のセラミック部を形成し、
前記第1のセラミック部は、前記第2のセラミック部に含有される半導体化剤よりも大きなイオン半径を有する半導体化剤を含有し、前記第1のセラミック部の空孔率が前記第2のセラミック部の空孔率よりも低減されていることを特徴とする積層正特性サーミスタ。 - 一対の前記第1のセラミック部のうち、少なくとも基板実装時に該基板と対面する前記第1のセラミック部の空孔にはガラス材が充填されていることを特徴とする請求項1記載の積層正特性サーミスタ。
- 前記第1のセラミック部の空孔率は、10%以下であることを特徴とする請求項1又は請求項2記載の積層正特性サーミスタ。
- 前記第1及び第2のセラミック部のそれぞれに含有される前記半導体化剤は、La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Y、Ho、Er、及びTmの群から各々選択された少なくとも一種であることを特徴とする請求項1乃至請求項3のいずれかに記載の積層正特性サーミスタ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009509037A JP4936087B2 (ja) | 2007-03-19 | 2008-03-18 | 積層正特性サーミスタ |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007070206 | 2007-03-19 | ||
JP2007070206 | 2007-03-19 | ||
JP2009509037A JP4936087B2 (ja) | 2007-03-19 | 2008-03-18 | 積層正特性サーミスタ |
PCT/JP2008/054997 WO2008123078A1 (ja) | 2007-03-19 | 2008-03-18 | 積層正特性サーミスタ |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2008123078A1 JPWO2008123078A1 (ja) | 2010-07-15 |
JP4936087B2 true JP4936087B2 (ja) | 2012-05-23 |
Family
ID=39830580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009509037A Active JP4936087B2 (ja) | 2007-03-19 | 2008-03-18 | 積層正特性サーミスタ |
Country Status (6)
Country | Link |
---|---|
US (1) | US7830240B2 (ja) |
JP (1) | JP4936087B2 (ja) |
CN (1) | CN101636798B (ja) |
DE (1) | DE112008000744B4 (ja) |
TW (1) | TW200903527A (ja) |
WO (1) | WO2008123078A1 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4970318B2 (ja) | 2007-06-12 | 2012-07-04 | Tdk株式会社 | 積層型ptcサーミスタ及びその製造方法 |
EP2015318B1 (en) | 2007-06-12 | 2012-02-29 | TDK Corporation | Stacked PTC thermistor and process for its production |
JP5304757B2 (ja) | 2010-09-06 | 2013-10-02 | Tdk株式会社 | セラミック積層ptcサーミスタ |
EP2774904B1 (en) * | 2011-11-01 | 2017-05-24 | Murata Manufacturing Co., Ltd. | Ptc thermistor and method for manufacturing ptc thermistor |
JP6107062B2 (ja) * | 2012-11-06 | 2017-04-05 | Tdk株式会社 | チップサーミスタ |
WO2014077004A1 (ja) | 2012-11-15 | 2014-05-22 | 株式会社村田製作所 | 正特性サーミスタおよびその製造方法 |
JP2015012052A (ja) * | 2013-06-27 | 2015-01-19 | 株式会社村田製作所 | セラミックサーミスタ |
CN104529434B (zh) * | 2014-12-19 | 2016-10-05 | 深圳顺络电子股份有限公司 | 一种片式陶瓷ptc热敏电阻表面保护层的制备方法 |
JP6777164B2 (ja) * | 2016-12-08 | 2020-10-28 | 株式会社村田製作所 | 多層セラミック基板及び電子装置 |
KR20220110858A (ko) * | 2016-12-23 | 2022-08-09 | 이보클라 비바덴트 아게 | 소결 거동이 조정된 다층 산화물 세라믹체 |
WO2019204430A1 (en) | 2018-04-17 | 2019-10-24 | Avx Corporation | Varistor for high temperature applications |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01293502A (ja) * | 1988-05-20 | 1989-11-27 | Murata Mfg Co Ltd | 正特性サーミスタ |
JPH0529104A (ja) * | 1991-07-19 | 1993-02-05 | Murata Mfg Co Ltd | Ptcサーミスタ |
JP3178083B2 (ja) * | 1992-05-07 | 2001-06-18 | 積水化成品工業株式会社 | チタン酸バリウム系セラミックス半導体およびその製造方法 |
JPH06302403A (ja) | 1993-04-16 | 1994-10-28 | Murata Mfg Co Ltd | 積層型半導体セラミック素子 |
JP2000082603A (ja) * | 1998-07-08 | 2000-03-21 | Murata Mfg Co Ltd | チップ型サ―ミスタおよびその製造方法 |
JP4108836B2 (ja) * | 1998-07-15 | 2008-06-25 | Tdk株式会社 | 誘電体磁器組成物 |
JP2000095562A (ja) * | 1998-07-24 | 2000-04-04 | Murata Mfg Co Ltd | 正特性サ―ミスタ用原料組成物、正特性サ―ミスタ用磁器、および正特性サ―ミスタ用磁器の製造方法 |
JP4269485B2 (ja) * | 2000-05-17 | 2009-05-27 | 宇部興産株式会社 | チタン酸バリウム鉛系半導体磁器組成物 |
JP3460683B2 (ja) | 2000-07-21 | 2003-10-27 | 株式会社村田製作所 | チップ型電子部品及びその製造方法 |
JP3636075B2 (ja) * | 2001-01-18 | 2005-04-06 | 株式会社村田製作所 | 積層ptcサーミスタ |
JP4211510B2 (ja) | 2002-08-13 | 2009-01-21 | 株式会社村田製作所 | 積層型ptcサーミスタの製造方法 |
JP4135651B2 (ja) * | 2003-03-26 | 2008-08-20 | 株式会社村田製作所 | 積層型正特性サーミスタ |
JP2005093574A (ja) | 2003-09-16 | 2005-04-07 | Murata Mfg Co Ltd | 積層型正特性サーミスタおよびその製造方法 |
WO2007034831A1 (ja) | 2005-09-20 | 2007-03-29 | Murata Manufacturing Co., Ltd. | 積層型正特性サーミスタ |
JP4710096B2 (ja) | 2005-09-20 | 2011-06-29 | 株式会社村田製作所 | 積層型正特性サーミスタ |
-
2008
- 2008-03-13 TW TW097108920A patent/TW200903527A/zh unknown
- 2008-03-18 DE DE112008000744.6T patent/DE112008000744B4/de active Active
- 2008-03-18 JP JP2009509037A patent/JP4936087B2/ja active Active
- 2008-03-18 CN CN2008800086202A patent/CN101636798B/zh active Active
- 2008-03-18 WO PCT/JP2008/054997 patent/WO2008123078A1/ja active Application Filing
-
2009
- 2009-09-18 US US12/562,969 patent/US7830240B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
TWI350547B (ja) | 2011-10-11 |
US7830240B2 (en) | 2010-11-09 |
US20100001828A1 (en) | 2010-01-07 |
TW200903527A (en) | 2009-01-16 |
DE112008000744B4 (de) | 2014-06-05 |
DE112008000744T5 (de) | 2010-02-04 |
JPWO2008123078A1 (ja) | 2010-07-15 |
CN101636798B (zh) | 2011-07-20 |
CN101636798A (zh) | 2010-01-27 |
WO2008123078A1 (ja) | 2008-10-16 |
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