KR970061805A - 자기디스크용 결정화 유리기판 - Google Patents

자기디스크용 결정화 유리기판 Download PDF

Info

Publication number
KR970061805A
KR970061805A KR1019970003181A KR19970003181A KR970061805A KR 970061805 A KR970061805 A KR 970061805A KR 1019970003181 A KR1019970003181 A KR 1019970003181A KR 19970003181 A KR19970003181 A KR 19970003181A KR 970061805 A KR970061805 A KR 970061805A
Authority
KR
South Korea
Prior art keywords
crystallized glass
magnetic disks
crystal phase
glass substrate
sio
Prior art date
Application number
KR1019970003181A
Other languages
English (en)
Other versions
KR100188901B1 (ko
Inventor
가쓰히코 야마구치
Original Assignee
가지가와 히로시
가부시키가이샤 오하라
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 가지가와 히로시, 가부시키가이샤 오하라 filed Critical 가지가와 히로시
Publication of KR970061805A publication Critical patent/KR970061805A/ko
Application granted granted Critical
Publication of KR100188901B1 publication Critical patent/KR100188901B1/ko

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

Abstract

콘택트 레코딩방식에 적합한 10A 이하의 표면조도(粗度)와 높은 내마모성(耐磨耗性)을 가지는 자기(磁氣)디스크용 결정화(結晶化) 유리기판을 제공한다.
기판을 결정화 유리의 주결정상(主結晶相)이-크리스토발라이트(-SiO2) 및 2규산리튬(Li2O·2SiO2)이고, 이 결정상의 구성비율은

Description

자기디스크용 결정화 유리기판
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (2)

  1. 결정화(結晶化) 유리의 주결정상(主結晶相)이-크리스토발라이트(-SiO2) 및 2규산리튬(Li2O·2SiO2)이고, 이 결정상의 구성비율은-크리스토발라이트/2규산리튬이 0.25~0.35이고, 결정입자의 입경(粒徑)이 0.1~1.0㎛의 범위의 값을 가지고, 자기(磁氣)디스크기판의 연마하여 이루어지는 표면조도(粗度)(Ra)가 2~10A이고, 또한 마모도(Aa)가 5~15의 범위내인 것을 특징으로 하는 자기디스크용 결정화 유리기판.
  2. 청구항 1에 있어서, 상기 결정화 유리는 중량백분율로, SiO275~83%, Li2O 7~13%, Al2O31~5%, P2O51~3%, MgO 0.5~3%, ZnO 0.5~3%, K2O 0~5%, As2O3및/ 또는 Sb2O30~2%로 이루어지는 원(原)유리를 열처리함으로써 얻어지는 것을 특징으로 하는 자기디스크용 결정화 유리기판.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019970003181A 1996-02-02 1997-02-01 자기디스크용 결정화 유리기판 KR100188901B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4037496 1996-02-02
JP96-40374 1996-02-02

Publications (2)

Publication Number Publication Date
KR970061805A true KR970061805A (ko) 1997-09-12
KR100188901B1 KR100188901B1 (ko) 1999-06-01

Family

ID=12578886

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970003181A KR100188901B1 (ko) 1996-02-02 1997-02-01 자기디스크용 결정화 유리기판

Country Status (8)

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

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
AU2880100A (en) 1999-02-12 2000-08-29 General Electric Company Data storage media
US6440531B1 (en) * 1999-05-13 2002-08-27 Nippon Sheet Glass Co., Ltd Hydrofluoric acid etched substrate for information recording medium
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
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
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
JP2001026440A (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
JP2001026454A (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
JP2001026445A (ja) 1999-07-14 2001-01-30 Minolta Co Ltd ガラス組成
JP2001026446A (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
JP2001026451A (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
JP2001026456A (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
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
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
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
JP2001287934A (ja) 2000-04-03 2001-10-16 Minolta Co Ltd ガラス組成
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
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
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
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
JP2001287967A (ja) 2000-04-03 2001-10-16 Minolta Co Ltd 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
WO2002085537A2 (en) * 2001-04-19 2002-10-31 General Electric Company Spin coating process
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
CN101909816B (zh) * 2008-10-01 2013-01-23 旭硝子株式会社 研磨浆料、其制造方法、研磨方法及磁盘用玻璃基板的制造方法
KR20220016997A (ko) * 2014-05-16 2022-02-10 이보클라 비바덴트 아게 주 결정 상으로서 SiO₂를 가진 유리 세라믹
EP4273106A3 (de) * 2015-08-25 2024-01-24 Ivoclar Vivadent AG Lithiumsilikat-tiefquarz-glaskeramik
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
US5391522A (en) * 1993-05-19 1995-02-21 Kabushiki Kaisya Ohara Glass-ceramic for magnetic disks and method for manufacturing the same
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
US5626935A (en) * 1993-05-19 1997-05-06 Kabushiki Kaisya Ohara Magnetic disk substrate and method for manufacturing the same
EP0729924B1 (en) * 1993-05-19 2000-01-26 Kabushiki Kaisha Ohara Glass-ceramic for a magnetic disk 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
US5985777A (en) 1999-11-16
DE69721353D1 (de) 2003-06-05
SG52914A1 (en) 1998-09-28
US5866489A (en) 1999-02-02
CN1167736A (zh) 1997-12-17
MY115524A (en) 2003-07-31
KR100188901B1 (ko) 1999-06-01
DE69721353T2 (de) 2004-04-08
CN1086679C (zh) 2002-06-26
TW366331B (en) 1999-08-11
EP0788093B1 (en) 2003-05-02
EP0788093A1 (en) 1997-08-06

Similar Documents

Publication Publication Date Title
KR970061805A (ko) 자기디스크용 결정화 유리기판
US5567217A (en) Method for manufacturing a crystalized glass magnetic disk substrate
JP2736869B2 (ja) 磁気ディスク基板の製造方法
EP0945855A3 (en) Glass-ceramic substrate for a magnetic information storage medium
TW498059B (en) High rigidity glass-ceramic substrate for a magnetic information storage medium, method for manufacturing the same, and magnetic information storage disk using the same
CN1042827C (zh) 磁盘基片用的玻璃-陶瓷及其制法
JPH06295401A (ja) 磁気記憶装置およびそれに用いるディスク
JPH02247821A (ja) 磁気記憶装置用ディスク
JPH09208260A (ja) 磁気ディスク用結晶化ガラス基板
JPH0977531A (ja) ガラスセラミック製品およびその製造方法
EP0875886A3 (en) A glass-ceramic substrate for a magnetic information storage medium
JPH02187922A (ja) 磁気ディスク用基板およびその製造方法
JP4450460B2 (ja) 結晶化ガラスおよびその製造方法、ならびにそれを用いた情報記録媒体用基板、情報記録媒体および情報記録装置
JPH07300340A (ja) 情報記録ディスク用結晶化ガラス
US6034011A (en) Glass-ceramic substrate for a magnetic head and a method for manufacturing the same
MY133135A (en) Glass-ceramic substrate for a magnetic information storage medium.
EP0858974B1 (en) Glass for information recording medium substrate and glass substrate
JP2883328B2 (ja) 磁気ヘッド浮上量測定用模擬ディスク
US6191058B1 (en) Glass-ceramic substrate for a magnetic disk
KR960014071A (ko) 메모리 저장소자 제조용 미립자 캐나사이트 유리-세라믹
JPH044656B2 (ko)
JP2000313639A (ja) 結晶化ガラスおよびその製造方法、ならびにそれを用いた情報記録媒体用基板、情報記録媒体および情報記録装置
JPS6360127A (ja) 高硬度高膨張性結晶化ガラス
JP3152905B2 (ja) 磁気ディスク用結晶化ガラス基板
JP2001052334A (ja) 磁気ディスク用基板素材およびその製造法

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20041201

Year of fee payment: 9

LAPS Lapse due to unpaid annual fee