DE69802571T2 - Verbundener Körper aus Aluminiumnitrid-Serienkeramiken, Verfahren zum Verbinden von Aluminiumnitrid-Serienkeramiken und Verbindungsmittel - Google Patents

Verbundener Körper aus Aluminiumnitrid-Serienkeramiken, Verfahren zum Verbinden von Aluminiumnitrid-Serienkeramiken und Verbindungsmittel

Info

Publication number
DE69802571T2
DE69802571T2 DE69802571T DE69802571T DE69802571T2 DE 69802571 T2 DE69802571 T2 DE 69802571T2 DE 69802571 T DE69802571 T DE 69802571T DE 69802571 T DE69802571 T DE 69802571T DE 69802571 T2 DE69802571 T2 DE 69802571T2
Authority
DE
Germany
Prior art keywords
aluminum nitride
nitride series
series ceramics
body made
connected body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE69802571T
Other languages
English (en)
Other versions
DE69802571D1 (de
Inventor
Tsuneaki Ohashi
Tsutomu Imai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Application granted granted Critical
Publication of DE69802571D1 publication Critical patent/DE69802571D1/de
Publication of DE69802571T2 publication Critical patent/DE69802571T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64Burning or sintering processes
    • C04B35/645Pressure sintering
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B37/00Joining burned ceramic articles with other burned ceramic articles or other articles by heating
    • C04B37/003Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts
    • C04B37/005Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts consisting of glass or ceramic material
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656Aspects 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
    • C04B2235/6562Heating rate
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/658Atmosphere during thermal treatment
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/04Ceramic interlayers
    • C04B2237/06Oxidic interlayers
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/04Ceramic interlayers
    • C04B2237/06Oxidic interlayers
    • C04B2237/064Oxidic interlayers based on alumina or aluminates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/04Ceramic interlayers
    • C04B2237/08Non-oxidic interlayers
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/10Glass interlayers, e.g. frit or flux
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32Ceramic
    • C04B2237/36Non-oxidic
    • C04B2237/366Aluminium nitride
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/70Forming laminates or joined articles comprising layers of a specific, unusual thickness
    • C04B2237/708Forming laminates or joined articles comprising layers of a specific, unusual thickness of one or more of the interlayers
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/76Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc
    • C04B2237/765Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc at least one member being a tube
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/25Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256Heavy metal or aluminum or compound thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Products (AREA)
  • Resistance Heating (AREA)
DE69802571T 1997-01-30 1998-01-28 Verbundener Körper aus Aluminiumnitrid-Serienkeramiken, Verfahren zum Verbinden von Aluminiumnitrid-Serienkeramiken und Verbindungsmittel Expired - Lifetime DE69802571T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2980897 1997-01-30
JP33829597A JP3604888B2 (ja) 1997-01-30 1997-11-25 窒化アルミニウム質セラミックス基材の接合体、窒化アルミニウム質セラミックス基材の接合体の製造方法及び接合剤

Publications (2)

Publication Number Publication Date
DE69802571D1 DE69802571D1 (de) 2002-01-03
DE69802571T2 true DE69802571T2 (de) 2002-08-01

Family

ID=26368051

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69802571T Expired - Lifetime DE69802571T2 (de) 1997-01-30 1998-01-28 Verbundener Körper aus Aluminiumnitrid-Serienkeramiken, Verfahren zum Verbinden von Aluminiumnitrid-Serienkeramiken und Verbindungsmittel

Country Status (6)

Country Link
US (1) US6261708B1 (de)
EP (1) EP0856499B1 (de)
JP (1) JP3604888B2 (de)
KR (1) KR100300646B1 (de)
DE (1) DE69802571T2 (de)
TW (1) TW434201B (de)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100305684B1 (ko) * 1999-02-06 2001-09-24 한종웅 내화재용 질화 알루미늄 분말의 제조방법
JP2002057207A (ja) * 2000-01-20 2002-02-22 Sumitomo Electric Ind Ltd 半導体製造装置用ウェハ保持体およびその製造方法ならびに半導体製造装置
JP4529690B2 (ja) * 2000-01-20 2010-08-25 住友電気工業株式会社 半導体製造装置用ウェハ保持体およびその製造方法ならびに半導体製造装置
JP2001253777A (ja) * 2000-03-13 2001-09-18 Ibiden Co Ltd セラミック基板
JP3976993B2 (ja) * 2000-08-01 2007-09-19 日本碍子株式会社 セラミックス基材の接合方法、セラミックス基材の接合体およびセラミックスヒーター
CN100486933C (zh) 2001-04-13 2009-05-13 住友电气工业株式会社 陶瓷接合体、基片支承构造体及基片处理装置
JP2003048784A (ja) * 2001-08-06 2003-02-21 Nhk Spring Co Ltd 窒化物セラミックスを備えた複合材とその製造方法
US6754062B2 (en) 2002-02-27 2004-06-22 Praxair S.T. Technology, Inc. Hybrid ceramic electrostatic clamp
US6699571B1 (en) 2002-03-27 2004-03-02 Morgan Advanced Ceramics, Inc. Devices and methods for mounting components of electronic circuitry
JP3534738B2 (ja) * 2002-03-28 2004-06-07 日本碍子株式会社 セラミックサセプターの取付構造、セラミックサセプターの支持構造およびセラミックサセプター用支持部材
JP3520074B2 (ja) * 2002-03-28 2004-04-19 日本碍子株式会社 セラミックサセプターの取付構造、セラミックサセプターの支持構造およびセラミックサセプターの支持部材
JP4026759B2 (ja) 2002-11-18 2007-12-26 日本碍子株式会社 加熱装置
JP4111013B2 (ja) * 2003-03-11 2008-07-02 住友電気工業株式会社 半導体製造装置用ウェハ保持体およびそれを搭載した半導体製造装置
JP2006527162A (ja) * 2003-06-13 2006-11-30 ジョー−ワン ハン、 セラミックス接合方法:反応拡散接合
US7488543B2 (en) * 2003-06-13 2009-02-10 Tokuyama Corporation Aluminum nitride conjugate body and method of producing the same
JP4518370B2 (ja) * 2003-07-10 2010-08-04 日本碍子株式会社 セラミックサセプターの支持構造
EP1690845A4 (de) * 2003-10-31 2009-04-01 Tokuyama Corp Aluminiumnitrid-verbundkörper und herstellungsverfahren dafür
KR100666039B1 (ko) * 2003-12-05 2007-01-10 동경 엘렉트론 주식회사 정전척
JP4787568B2 (ja) * 2004-11-16 2011-10-05 日本碍子株式会社 接合剤、窒化アルミニウム接合体及びその製造方法
TW200633947A (en) 2005-02-16 2006-10-01 Ngk Insulators Ltd Joined body and manufacturing method for the same
US7126093B2 (en) 2005-02-23 2006-10-24 Ngk Insulators, Ltd. Heating systems
TWI308908B (en) * 2005-12-27 2009-04-21 Ngk Insulators Ltd Aluminum nitride composite body, and manufacturing method of the same
KR20080109779A (ko) * 2006-03-29 2008-12-17 가부시끼가이샤 도꾸야마 질화알루미늄 소결체의 접합 방법 및 질화알루미늄 접합체
TW200823166A (en) * 2006-11-27 2008-06-01 Tokuyama Corp Process for manufacturing body in which aluminum nitride bodies are joined
JP5111954B2 (ja) * 2007-06-22 2013-01-09 新光電気工業株式会社 静電チャック及びその製造方法
DE102008040260A1 (de) * 2007-07-13 2009-01-15 Frauenhofer-Gesellschaft Diffusionsgefügtes keramisches Bauteil und Verfahren zu seiner Herstellung
JP5487413B2 (ja) * 2009-09-08 2014-05-07 太平洋セメント株式会社 セラミックス接合体及びその製造方法
JP5486345B2 (ja) * 2009-09-30 2014-05-07 太平洋セメント株式会社 セラミックス焼結体の製造方法
JP6078450B2 (ja) 2012-10-26 2017-02-08 日本碍子株式会社 半導体製造装置用部材及びその製法
KR102020682B1 (ko) * 2013-05-09 2019-09-11 주식회사 미코 세라믹 히터 및 이를 제조하는 방법
JP6335080B2 (ja) * 2013-12-27 2018-05-30 日本碍子株式会社 接合材組成物、窒化アルミニウム接合体及びその製法
KR102276101B1 (ko) 2013-12-27 2021-07-13 엔지케이 인슐레이터 엘티디 접합재 조성물, 질화알루미늄 접합체 및 그 제법
JP6370062B2 (ja) * 2014-02-28 2018-08-08 日本特殊陶業株式会社 窒化アルミニウム接合体およびその製造方法
JP6219229B2 (ja) * 2014-05-19 2017-10-25 東京エレクトロン株式会社 ヒータ給電機構
JP6556323B2 (ja) * 2016-02-26 2019-08-07 京セラ株式会社 セラミック接合体
KR102209156B1 (ko) * 2016-07-20 2021-01-28 니혼도꾸슈도교 가부시키가이샤 반도체 제조장치용 부품의 제조방법 및 반도체 제조장치용 부품
US20190304813A1 (en) * 2016-07-20 2019-10-03 Ngk Spark Plug Co., Ltd. Component for semiconductor production device
JP6490296B2 (ja) 2016-07-20 2019-03-27 日本特殊陶業株式会社 半導体製造装置用部品
JP2018142409A (ja) * 2017-02-27 2018-09-13 古河電気工業株式会社 超電導線材の接続構造
JP6959201B2 (ja) 2018-08-29 2021-11-02 日本碍子株式会社 セラミックヒータ
CN109133964A (zh) * 2018-09-26 2019-01-04 北京无线电测量研究所 异种陶瓷连接方法
KR102242589B1 (ko) * 2020-09-09 2021-04-21 주식회사 미코세라믹스 세라믹 히터
JP2023030646A (ja) * 2021-08-23 2023-03-08 日本碍子株式会社 AlN接合体

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347089A (en) * 1981-07-29 1982-08-31 Sri International Method for bonding silicon nitride
US5165983A (en) * 1984-09-30 1992-11-24 Kabushiki Kaisha Toshiba Method for production of aluminum nitride ceramic plate
DE3534886A1 (de) * 1984-09-30 1986-04-03 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa Verfahren zum herstellen von aluminiumnitrid-keramik-platten
US5024883A (en) * 1986-10-30 1991-06-18 Olin Corporation Electronic packaging of components incorporating a ceramic-glass-metal composite
JPH02124778A (ja) 1988-11-04 1990-05-14 Hitachi Metals Ltd AlNセラミックス同志の接合体及びこれを用いた放熱装置
US5051397A (en) * 1988-11-25 1991-09-24 Hitachi, Ltd. Joined body of high-temperature oxide superconductor and method of joining oxide superconductors
DE69210499T2 (de) * 1991-02-26 1996-12-05 Daihen Corp Verfahren zum verbinden von keramikteilen und einsetzmaterial für das hitzeverkleben
JP2713688B2 (ja) * 1993-11-17 1998-02-16 日本碍子株式会社 セラミックス接合体の製造方法
US5541145A (en) * 1993-12-22 1996-07-30 The Carborundum Company/Ibm Corporation Low temperature sintering route for aluminum nitride ceramics
JP2783980B2 (ja) * 1994-09-01 1998-08-06 日本碍子株式会社 接合体およびその製造方法
DE69601670T2 (de) * 1995-07-19 1999-11-11 Tokuyama Corp Aluminiumnitrid-Verbindungsstruktur

Also Published As

Publication number Publication date
JPH10273370A (ja) 1998-10-13
EP0856499A2 (de) 1998-08-05
US6261708B1 (en) 2001-07-17
DE69802571D1 (de) 2002-01-03
TW434201B (en) 2001-05-16
JP3604888B2 (ja) 2004-12-22
EP0856499B1 (de) 2001-11-21
EP0856499A3 (de) 1998-12-30
KR100300646B1 (ko) 2001-11-22
KR19980070861A (ko) 1998-10-26

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