DE69721353D1 - Glaskeramisches Substrat für magnetische Platte - Google Patents

Glaskeramisches Substrat für magnetische Platte

Info

Publication number
DE69721353D1
DE69721353D1 DE69721353T DE69721353T DE69721353D1 DE 69721353 D1 DE69721353 D1 DE 69721353D1 DE 69721353 T DE69721353 T DE 69721353T DE 69721353 T DE69721353 T DE 69721353T DE 69721353 D1 DE69721353 D1 DE 69721353D1
Authority
DE
Germany
Prior art keywords
ceramic substrate
glass ceramic
magnetic disc
disc
magnetic
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 - Fee Related
Application number
DE69721353T
Other languages
English (en)
Other versions
DE69721353T2 (de
Inventor
Katsuhiko Yamaguchi
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.)
Ohara Inc
Original Assignee
Ohara Inc
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 Ohara Inc filed Critical Ohara Inc
Application granted granted Critical
Publication of DE69721353D1 publication Critical patent/DE69721353D1/de
Publication of DE69721353T2 publication Critical patent/DE69721353T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/0018—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents
    • C03C10/0027—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents containing SiO2, Al2O3, Li2O as main constituents
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/0036—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents
    • C03C10/0045—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents containing SiO2, Al2O3 and MgO as main constituents
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73911—Inorganic substrates
    • G11B5/73921—Glass or ceramic substrates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Glass Compositions (AREA)
  • Magnetic Record Carriers (AREA)
DE69721353T 1996-02-02 1997-02-03 Glaskeramisches Substrat für magnetische Platte Expired - Fee Related DE69721353T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4037496 1996-02-02
JP4037496 1996-02-02

Publications (2)

Publication Number Publication Date
DE69721353D1 true DE69721353D1 (de) 2003-06-05
DE69721353T2 DE69721353T2 (de) 2004-04-08

Family

ID=12578886

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69721353T Expired - Fee Related DE69721353T2 (de) 1996-02-02 1997-02-03 Glaskeramisches Substrat für magnetische Platte

Country Status (8)

Country Link
US (2) US5866489A (de)
EP (1) EP0788093B1 (de)
KR (1) KR100188901B1 (de)
CN (1) CN1086679C (de)
DE (1) DE69721353T2 (de)
MY (1) MY115524A (de)
SG (1) SG52914A1 (de)
TW (1) TW366331B (de)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3416033B2 (ja) * 1996-09-05 2003-06-16 株式会社オハラ 磁気ヘッド用結晶化ガラス基板およびその製造方法
US6120922A (en) * 1997-04-28 2000-09-19 Goto; Naoyuki Glass-ceramic substrate for a magnetic information storage medium
US6383645B1 (en) * 1998-03-23 2002-05-07 Kabushiki Kaisha Ohara Glass-ceramic substrate for an information storage medium
US6395368B1 (en) * 1998-08-10 2002-05-28 Kabushiki Kaisha Ohara Glass-ceramic substrate for a magnetic information storage medium
SG84541A1 (en) * 1998-08-19 2001-11-20 Hoya Corp Glass substrate for magnetic recording medium, magnetic recording medium, and method of manufacturing the same
JP2000203880A (ja) * 1998-09-11 2000-07-25 Ohara Inc 情報記憶媒体用ガラスセラミックス基板及びその製造方法、並びに情報記憶媒体ディスク
WO2000048172A2 (en) * 1999-02-12 2000-08-17 General Electric Company Data storage media
JP3959588B2 (ja) * 1999-05-13 2007-08-15 日本板硝子株式会社 情報記録媒体用ガラス基板、情報記録媒体用ガラス基板の製造方法及び情報記録媒体
JP4337176B2 (ja) 1999-07-06 2009-09-30 コニカミノルタオプト株式会社 ガラス組成
JP4831854B2 (ja) 1999-07-06 2011-12-07 コニカミノルタオプト株式会社 結晶化ガラス組成物
JP4158282B2 (ja) 1999-07-06 2008-10-01 コニカミノルタオプト株式会社 磁気ディスク用結晶化ガラス基板
JP4849702B2 (ja) 1999-07-06 2012-01-11 コニカミノルタオプト株式会社 結晶化ガラス
JP2001026445A (ja) 1999-07-14 2001-01-30 Minolta Co Ltd ガラス組成
JP2001026452A (ja) 1999-07-14 2001-01-30 Minolta Co Ltd ガラス組成
JP4265035B2 (ja) 1999-07-14 2009-05-20 コニカミノルタオプト株式会社 結晶化ガラス組成物
JP4207316B2 (ja) 1999-07-14 2009-01-14 コニカミノルタオプト株式会社 結晶化ガラス組成物
JP2001026454A (ja) 1999-07-14 2001-01-30 Minolta Co Ltd ガラス組成
JP2001026458A (ja) 1999-07-14 2001-01-30 Minolta Co Ltd ガラス組成
JP4265036B2 (ja) 1999-07-14 2009-05-20 コニカミノルタオプト株式会社 結晶化ガラス組成物
JP2001026451A (ja) 1999-07-14 2001-01-30 Minolta Co Ltd ガラス組成
JP2001026456A (ja) 1999-07-14 2001-01-30 Minolta Co Ltd ガラス組成
JP2001026440A (ja) 1999-07-14 2001-01-30 Minolta Co Ltd ガラス組成
JP4284763B2 (ja) 1999-07-14 2009-06-24 コニカミノルタオプト株式会社 ガラス組成
JP2001026446A (ja) 1999-07-14 2001-01-30 Minolta Co Ltd ガラス組成
JP3107304B1 (ja) * 1999-08-10 2000-11-06 株式会社オハラ 光フィルター用ガラスセラミックス及び光フィルター
US6677259B2 (en) * 1999-08-10 2004-01-13 Kabushiki Kaisha Ohara Glass-ceramics for a light filter
US6426311B1 (en) * 2000-02-01 2002-07-30 Kabushiki Kaisha Ohara Glass-ceramics
JP2001287931A (ja) 2000-04-03 2001-10-16 Minolta Co Ltd ガラス組成
JP2001287934A (ja) 2000-04-03 2001-10-16 Minolta Co Ltd ガラス組成
JP4300676B2 (ja) 2000-04-03 2009-07-22 コニカミノルタオプト株式会社 ガラス組成物
JP4224925B2 (ja) 2000-04-03 2009-02-18 コニカミノルタオプト株式会社 ガラス組成物
JP2001287967A (ja) 2000-04-03 2001-10-16 Minolta Co Ltd ガラス組成
JP4273625B2 (ja) 2000-04-03 2009-06-03 コニカミノルタオプト株式会社 ガラス組成物
JP4273624B2 (ja) 2000-04-03 2009-06-03 コニカミノルタオプト株式会社 ガラス組成物
JP4273623B2 (ja) 2000-04-03 2009-06-03 コニカミノルタオプト株式会社 ガラス組成物
JP4207358B2 (ja) 2000-04-03 2009-01-14 コニカミノルタオプト株式会社 ガラス組成
CN1103326C (zh) * 2000-11-16 2003-03-19 湖北新华光信息材料股份有限公司 一种化学钢化玻璃磁盘基板制作方法
EP1427541B1 (de) * 2001-04-19 2010-11-17 SABIC Innovative Plastics IP B.V. Zentrifugalbeschichtungsverfahren
TW200724506A (en) * 2005-10-07 2007-07-01 Ohara Kk Inorganic composition
JP4467597B2 (ja) 2007-04-06 2010-05-26 株式会社オハラ 無機組成物物品
JP5516396B2 (ja) * 2008-10-01 2014-06-11 旭硝子株式会社 研磨スラリー、その製造方法、研磨方法および磁気ディスク用ガラス基板の製造方法
CN106458715B (zh) * 2014-05-16 2022-11-25 义获嘉伟瓦登特公司 包含SiO2作为主晶相的玻璃陶瓷
ES2983090T3 (es) * 2015-08-25 2024-10-21 Ivoclar Vivadent Ag Vitrocerámica de silicato de litio y cuarzo alfa
CN112939469B (zh) * 2021-03-23 2022-03-08 成都光明光电股份有限公司 微晶玻璃和微晶玻璃制品

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4480044A (en) * 1984-02-01 1984-10-30 Corning Glass Works High expansion glass-ceramic articles
JP2516553B2 (ja) * 1993-05-19 1996-07-24 株式会社オハラ 磁気ディスク用結晶化ガラスおよびその製造方法
US5391522A (en) * 1993-05-19 1995-02-21 Kabushiki Kaisya Ohara Glass-ceramic for magnetic disks and method for manufacturing the same
US5626935A (en) * 1993-05-19 1997-05-06 Kabushiki Kaisya Ohara Magnetic disk substrate and method for manufacturing the same
EP0729924B1 (de) * 1993-05-19 2000-01-26 Kabushiki Kaisha Ohara Glaskeramik für Magnetplatten-Substrate
JP2959363B2 (ja) * 1993-12-09 1999-10-06 株式会社オハラ 磁気ディスク用着色結晶化ガラス
JP2799544B2 (ja) * 1994-04-28 1998-09-17 株式会社オハラ 情報記録ディスク用結晶化ガラス
US5744208A (en) * 1994-06-24 1998-04-28 Corning Incorporated Glass-ceramics containing lithium disilicate and tridymite
US5582363A (en) * 1995-07-06 1996-12-10 Davis; Don Aircraft instrument panel cover
JPH10158034A (ja) * 1996-10-04 1998-06-16 S Ii C Kk 情報記録ディスク基板用結晶化ガラス

Also Published As

Publication number Publication date
US5866489A (en) 1999-02-02
US5985777A (en) 1999-11-16
KR970061805A (ko) 1997-09-12
TW366331B (en) 1999-08-11
SG52914A1 (en) 1998-09-28
MY115524A (en) 2003-07-31
EP0788093A1 (de) 1997-08-06
DE69721353T2 (de) 2004-04-08
CN1167736A (zh) 1997-12-17
EP0788093B1 (de) 2003-05-02
KR100188901B1 (ko) 1999-06-01
CN1086679C (zh) 2002-06-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee