MY188043A - Glass substrate for information recording medium - Google Patents

Glass substrate for information recording medium

Info

Publication number
MY188043A
MY188043A MYPI2016700695A MYPI2016700695A MY188043A MY 188043 A MY188043 A MY 188043A MY PI2016700695 A MYPI2016700695 A MY PI2016700695A MY PI2016700695 A MYPI2016700695 A MY PI2016700695A MY 188043 A MY188043 A MY 188043A
Authority
MY
Malaysia
Prior art keywords
recording medium
information recording
glass substrate
sio2
mgo
Prior art date
Application number
MYPI2016700695A
Inventor
Noriko Shimazu
Hiroshi Kajita
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 MY188043A publication Critical patent/MY188043A/en

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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

A glass substrate for an information recording medium of the present invention has a glass composition in which specific content ranges of constituent components are satisfied, and in mol%, the following conditions: SiO2+A12O3+B2O3: 67 to 82%; Li2O+Na2O+K2O: 8 to 20%; and MgO+CaO+SrO+BaO+ZnO: 10 to 28% are satisfied, and the following ratios: 0.85<SiO2/(SiO2+A12O3+B2O3)<0.95; 0.3<SLi2O/(Li2O+Na2O+K2O)<0.7; and 0.8<MgO/(MgO+CaO+SrO+BaO+ZnO)<0.99 are satisfied.
MYPI2016700695A 2013-08-30 2014-08-22 Glass substrate for information recording medium MY188043A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013179975 2013-08-30
PCT/JP2014/072008 WO2015029902A1 (en) 2013-08-30 2014-08-22 Glass substrate for information recording media

Publications (1)

Publication Number Publication Date
MY188043A true MY188043A (en) 2021-11-11

Family

ID=52586461

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2016700695A MY188043A (en) 2013-08-30 2014-08-22 Glass substrate for information recording medium

Country Status (5)

Country Link
JP (1) JP6052936B2 (en)
CN (1) CN105473520B (en)
MY (1) MY188043A (en)
SG (1) SG11201601369TA (en)
WO (1) WO2015029902A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7165655B2 (en) * 2017-06-09 2022-11-04 Hoya株式会社 Glass for information recording medium substrate, information recording medium substrate, information recording medium and glass spacer for recording/reproducing device
JP2023503879A (en) 2019-11-26 2023-02-01 コーニング インコーポレイテッド Magnesium aluminosilicate glass with high fracture toughness
US11951713B2 (en) 2020-12-10 2024-04-09 Corning Incorporated Glass with unique fracture behavior for vehicle windshield
US12122714B2 (en) 2020-12-10 2024-10-22 Corning Incorporated Glass with unique fracture behavior for vehicle windshield
EP4303197A4 (en) * 2021-03-05 2025-04-09 Hoya Corporation GLASS FOR MAGNETIC RECORDING CARRIER SUBSTRATE OR GLASS SPACER FOR USE IN MAGNETIC RECORDING/REPRODUCING DEVICE, MAGNETIC RECORDING CARRIER SUBSTRATE, MAGNETIC RECORDING MEDIUM, GLASS SPACER FOR USE IN MAGNETIC RECORDING/REPRODUCING DEVICE, AND MAGNETIC RECORDING/REPRODUCING DEVICE

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69902839T2 (en) * 1998-04-28 2003-05-28 Asahi Glass Co., Ltd. Flat glass and substrate glass for electronics
JP3995902B2 (en) * 2001-05-31 2007-10-24 Ｈｏｙａ株式会社 Glass substrate for information recording medium and magnetic information recording medium using the same
JP4530618B2 (en) * 2002-09-27 2010-08-25 コニカミノルタオプト株式会社 Glass composition and glass substrate
JP4430001B2 (en) * 2005-11-01 2010-03-10 湖州大享玻璃制品有限公司 Li2O-Al2O3-SiO2-MgO-K2O-F-based crystalline glass and crystallized glass, and method for producing the crystalline glass and crystallized glass
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
JP5613164B2 (en) * 2009-09-28 2014-10-22 Hoya株式会社 Glass substrate for information recording medium and information recording medium
US8394516B2 (en) * 2010-10-29 2013-03-12 Hoya Corporation Glass substrate for magnetic recording medium and magnetic recording medium
JP5737043B2 (en) * 2011-07-29 2015-06-17 旭硝子株式会社 Substrate glass and glass substrate

Also Published As

Publication number Publication date
JPWO2015029902A1 (en) 2017-03-02
JP6052936B2 (en) 2016-12-27
SG11201601369TA (en) 2016-03-30
CN105473520B (en) 2018-11-06
CN105473520A (en) 2016-04-06
WO2015029902A1 (en) 2015-03-05

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