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MY174496A - Magnetic-disk glass substrate, method for manufacturing magnetic-disk glass substrate, and magnetic disk - Google Patents

Magnetic-disk glass substrate, method for manufacturing magnetic-disk glass substrate, and magnetic disk

Info

Publication number
MY174496A
MY174496A MYPI2016700734A MYPI2016700734A MY174496A MY 174496 A MY174496 A MY 174496A MY PI2016700734 A MYPI2016700734 A MY PI2016700734A MY PI2016700734 A MYPI2016700734 A MY PI2016700734A MY 174496 A MY174496 A MY 174496A
Authority
MY
Malaysia
Prior art keywords
magnetic
glass substrate
disk
disk glass
manufacturing
Prior art date
Application number
MYPI2016700734A
Inventor
Katsuyuki Iwata
Kazuaki Hashimoto
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 MY174496A publication Critical patent/MY174496A/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
    • 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
    • C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
    • C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
    • C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
    • 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/078—Glass compositions containing silica with 40% to 90% silica, by weight containing an oxide of a divalent metal, e.g. an oxide of zinc
    • 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

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Ceramic Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Surface Treatment Of Glass (AREA)
  • Glass Compositions (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

A magnetic-disk glass substrate contains Li2O in an amount of 0.1 to 1 mol% as a glass composition. A fracture toughness valueKIC [MPa?m1/2] of this glass substrate is greater than or equal to 1 [MPa?m1/2].A compressive stress layer is provided on a surface of the glass substrate by chemical strengthening, and a depth D [?m] of the compressive stress layer satisfies D?57 ? KIC-1.6 and D?20 [?m].This glass substrate can be obtained by adjusting conditions of chemical strengthening processing.
MYPI2016700734A 2013-09-18 2014-09-08 Magnetic-disk glass substrate, method for manufacturing magnetic-disk glass substrate, and magnetic disk MY174496A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013193476 2013-09-18

Publications (1)

Publication Number Publication Date
MY174496A true MY174496A (en) 2020-04-23

Family

ID=52688948

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2016700734A MY174496A (en) 2013-09-18 2014-09-08 Magnetic-disk glass substrate, method for manufacturing magnetic-disk glass substrate, and magnetic disk

Country Status (5)

Country Link
JP (1) JP6209615B2 (en)
CN (1) CN105431904B (en)
MY (1) MY174496A (en)
SG (1) SG11201601613PA (en)
WO (1) WO2015041301A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101689376B (en) * 2007-09-28 2012-07-11 Hoya株式会社 Glass substrate for magnetic disk, process for producing the glass substrate, and magnetic disk
JP2010080015A (en) * 2008-09-27 2010-04-08 Hoya Corp Glass material for manufacturing glass substrate for magnetic disk, method of manufacturing glass substrate for magnetic disk, and method of manufacturing magnetic disk
JP2011201711A (en) * 2010-03-24 2011-10-13 Hoya Corp Display cover glass and display
JP5975654B2 (en) * 2011-01-27 2016-08-23 Hoya株式会社 Manufacturing method of glass substrate for magnetic disk and manufacturing method of magnetic disk
JP5829447B2 (en) * 2011-07-22 2015-12-09 株式会社オハラ Crystallized glass and crystallized glass substrate for information recording medium

Also Published As

Publication number Publication date
JP6209615B2 (en) 2017-10-04
CN105431904A (en) 2016-03-23
SG11201601613PA (en) 2016-04-28
JPWO2015041301A1 (en) 2017-03-02
WO2015041301A1 (en) 2015-03-26
CN105431904B (en) 2018-08-28

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