MY169221A - Glass for magnetic recording medium substrate, glass substrate for magnetic recording medium, and their use - Google Patents

Glass for magnetic recording medium substrate, glass substrate for magnetic recording medium, and their use

Info

Publication number
MY169221A
MY169221A MYPI2014702850A MYPI2014702850A MY169221A MY 169221 A MY169221 A MY 169221A MY PI2014702850 A MYPI2014702850 A MY PI2014702850A MY PI2014702850 A MYPI2014702850 A MY PI2014702850A MY 169221 A MY169221 A MY 169221A
Authority
MY
Malaysia
Prior art keywords
recording medium
magnetic recording
glass
cao
substrate
Prior art date
Application number
MYPI2014702850A
Inventor
Matsumoto Naomi
Hashimoto Kazuaki
Original Assignee
Hoya Corp
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 Hoya Corp filed Critical Hoya Corp
Publication of MY169221A publication Critical patent/MY169221A/en

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

An aspect of the present invention relates to glass for a magnetic recording medium substrate, which comprises essential components in the form of Si02, LhO, Na2O, and one or more alkaline earth metal oxides selected from the group consisting of MgO, CaO, SrO, and BaO wherein a molar ratio of a content of CaO to a combined content ofMgO, CaO, SrO, and BaO (CaO/(MgO + CaO + SrO + BaO)) is equal to or less than 0.20, and which has a glass transition temperature of equal to or higher than 650?C. Figure 5.
MYPI2014702850A 2012-03-29 2013-03-13 Glass for magnetic recording medium substrate, glass substrate for magnetic recording medium, and their use MY169221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012076309 2012-03-29

Publications (1)

Publication Number Publication Date
MY169221A true MY169221A (en) 2019-03-19

Family

ID=49259521

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2014702850A MY169221A (en) 2012-03-29 2013-03-13 Glass for magnetic recording medium substrate, glass substrate for magnetic recording medium, and their use

Country Status (5)

Country Link
JP (1) JP6042875B2 (en)
CN (1) CN104246883B (en)
MY (1) MY169221A (en)
SG (1) SG11201406177YA (en)
WO (1) WO2013146256A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104303231A (en) * 2012-05-16 2015-01-21 Hoya株式会社 Glass for magnetic recording medium substrate and use for same
JP6131154B2 (en) * 2013-09-11 2017-05-17 Hoya株式会社 Glass for magnetic recording medium substrate and magnetic recording medium substrate
WO2019060474A1 (en) * 2017-09-21 2019-03-28 Corning Incorporated Transparent ion-exchangeable silicate glasses with high fracture toughness
JP7134397B2 (en) * 2018-02-28 2022-09-12 日本電気硝子株式会社 tempered glass and tempered glass
US20230162759A1 (en) * 2020-06-02 2023-05-25 Nippon Electric Glass Co., Ltd. Glass disk for magnetic recording medium and magnetic recording device using the same
CN116023025B (en) * 2023-01-19 2024-06-28 清远南玻节能新材料有限公司 Aluminoborosilicate glass for ion exchange and preparation method and application thereof
CN117342789B (en) * 2023-10-24 2025-11-04 青岛融合新材料科技有限公司 Multi-composite crystalline phase magnetic glass and its preparation method

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10226532A (en) * 1995-12-28 1998-08-25 Yamamura Glass Co Ltd Glass composition for magnetic disk substrate and magnetic disk substrate
US5972460A (en) * 1996-12-26 1999-10-26 Hoya Corporation Information recording medium
JP3412804B2 (en) * 1996-12-26 2003-06-03 Ｈｏｙａ株式会社 Information recording medium substrate
JP4161509B2 (en) * 1999-04-13 2008-10-08 旭硝子株式会社 Glass for information recording medium substrate and glass substrate for information recording medium
JP4017466B2 (en) * 2001-12-04 2007-12-05 岡本硝子株式会社 Heat resistant glass
JP3897170B2 (en) * 2002-01-21 2007-03-22 日本板硝子株式会社 Infrared emitter and optical amplification medium
JP4446683B2 (en) * 2002-05-24 2010-04-07 Ｈｏｙａ株式会社 Glass substrate for magnetic recording media
KR20050009703A (en) * 2002-06-03 2005-01-25 호야 가부시키가이샤 Substrate for information recording medium, information recording medium and process for producing the same
JP4726400B2 (en) * 2003-05-29 2011-07-20 コニカミノルタオプト株式会社 Manufacturing method of glass substrate
WO2010032766A1 (en) * 2008-09-16 2010-03-25 Hoya株式会社 Vertical magnetic recording medium and method for manufacturing the same
JP5699434B2 (en) * 2009-04-02 2015-04-08 旭硝子株式会社 Glass for information recording medium substrate, glass substrate for information recording medium and magnetic disk
EP2465828A4 (en) * 2009-08-10 2014-03-26 Hoya Corp Glass for magnetic recording medium substrate, magnetic recording medium substrate and method for producing same, and magnetic recording medium
JP5330307B2 (en) * 2010-03-31 2013-10-30 Ｈｏｙａ株式会社 Manufacturing method of glass blank, manufacturing method of magnetic recording medium substrate, and manufacturing method of magnetic recording medium
JP5528907B2 (en) * 2010-05-31 2014-06-25 Ｈｏｙａ株式会社 Glass substrate for heat-assisted recording medium
JP5837492B2 (en) * 2010-06-30 2015-12-24 Hoya株式会社 Glass substrate for information recording media

Also Published As

Publication number Publication date
CN104246883B (en) 2018-10-23
WO2013146256A1 (en) 2013-10-03
JP6042875B2 (en) 2016-12-14
JPWO2013146256A1 (en) 2015-12-10
CN104246883A (en) 2014-12-24
SG11201406177YA (en) 2014-11-27

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