JP7766206B2 - 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置 - Google Patents

磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置

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Publication number
JP7766206B2
JP7766206B2 JP2024545730A JP2024545730A JP7766206B2 JP 7766206 B2 JP7766206 B2 JP 7766206B2 JP 2024545730 A JP2024545730 A JP 2024545730A JP 2024545730 A JP2024545730 A JP 2024545730A JP 7766206 B2 JP7766206 B2 JP 7766206B2
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Japan
Prior art keywords
glass
less
magnetic recording
content
mol
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JP2024545730A
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English (en)
Japanese (ja)
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JPWO2024053741A1 (https=
JPWO2024053741A5 (https=
Inventor
秀造 徳光
和明 橋本
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.)
Hoya Corp
Original Assignee
Hoya Corp
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Publication date
Application filed by Hoya Corp filed Critical Hoya Corp
Publication of JPWO2024053741A1 publication Critical patent/JPWO2024053741A1/ja
Publication of JPWO2024053741A5 publication Critical patent/JPWO2024053741A5/ja
Priority to JP2025180075A priority Critical patent/JP2026021401A/ja
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Publication of JP7766206B2 publication Critical patent/JP7766206B2/ja
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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
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • 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
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • 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)
JP2024545730A 2022-09-08 2023-09-08 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置 Active JP7766206B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2025180075A JP2026021401A (ja) 2022-09-08 2025-10-27 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2022143093 2022-09-08
JP2022143093 2022-09-08
PCT/JP2023/032919 WO2024053741A1 (ja) 2022-09-08 2023-09-08 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2025180075A Division JP2026021401A (ja) 2022-09-08 2025-10-27 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置

Publications (3)

Publication Number Publication Date
JPWO2024053741A1 JPWO2024053741A1 (https=) 2024-03-14
JPWO2024053741A5 JPWO2024053741A5 (https=) 2025-05-02
JP7766206B2 true JP7766206B2 (ja) 2025-11-07

Family

ID=90191306

Family Applications (2)

Application Number Title Priority Date Filing Date
JP2024545730A Active JP7766206B2 (ja) 2022-09-08 2023-09-08 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置
JP2025180075A Pending JP2026021401A (ja) 2022-09-08 2025-10-27 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP2025180075A Pending JP2026021401A (ja) 2022-09-08 2025-10-27 磁気記録媒体基板用ガラス、磁気記録媒体基板および磁気記録再生装置

Country Status (4)

Country Link
EP (1) EP4585575A1 (https=)
JP (2) JP7766206B2 (https=)
CN (1) CN119836403A (https=)
WO (1) WO2024053741A1 (https=)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000313634A (ja) 1999-02-25 2000-11-14 Nippon Sheet Glass Co Ltd ガラス組成物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
JP2010254549A (ja) 2009-04-02 2010-11-11 Asahi Glass Co Ltd 情報記録媒体基板用ガラス、情報記録媒体用ガラス基板および磁気ディスク
WO2017204224A1 (ja) 2016-05-27 2017-11-30 旭硝子株式会社 磁気記録媒体用ガラス、磁気記録媒体用ガラス基板および磁気ディスク
WO2018088563A1 (ja) 2016-11-14 2018-05-17 Hoya株式会社 磁気記録媒体基板用ガラス、磁気記録媒体基板、磁気記録媒体および磁気記録再生装置用ガラススペーサ
WO2019221102A1 (ja) 2018-05-16 2019-11-21 Hoya株式会社 磁気記録媒体基板用ガラス、磁気記録媒体基板、磁気記録媒体、磁気記録再生装置用ガラススペーサおよび磁気記録再生装置
WO2021015240A1 (ja) 2019-07-22 2021-01-28 Hoya株式会社 磁気記録媒体基板用ガラス、磁気記録媒体基板、磁気記録媒体、磁気記録再生装置用ガラススペーサおよび磁気記録再生装置
JP2021086643A (ja) 2019-11-25 2021-06-03 日本電気硝子株式会社 磁気記録媒体用ガラス基板及びそれを用いた磁気記録装置
WO2021117897A1 (ja) 2019-12-13 2021-06-17 Hoya株式会社 磁気記録媒体基板用または磁気記録再生装置用ガラススペーサ用のガラス、磁気記録媒体基板、磁気記録媒体、磁気記録再生装置用ガラススペーサおよび磁気記録再生装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3995902B2 (ja) 2001-05-31 2007-10-24 Ｈｏｙａ株式会社 情報記録媒体用ガラス基板及びそれを用いた磁気情報記録媒体
EP2465828A4 (en) 2009-08-10 2014-03-26 Hoya Corp GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM SUBSTRATE AND METHOD FOR PRODUCING THE SAME, AND MAGNETIC RECORDING MEDIUM

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000313634A (ja) 1999-02-25 2000-11-14 Nippon Sheet Glass Co Ltd ガラス組成物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
JP2010254549A (ja) 2009-04-02 2010-11-11 Asahi Glass Co Ltd 情報記録媒体基板用ガラス、情報記録媒体用ガラス基板および磁気ディスク
WO2017204224A1 (ja) 2016-05-27 2017-11-30 旭硝子株式会社 磁気記録媒体用ガラス、磁気記録媒体用ガラス基板および磁気ディスク
WO2018088563A1 (ja) 2016-11-14 2018-05-17 Hoya株式会社 磁気記録媒体基板用ガラス、磁気記録媒体基板、磁気記録媒体および磁気記録再生装置用ガラススペーサ
JP2020121920A (ja) 2016-11-14 2020-08-13 Hoya株式会社 磁気記録媒体基板用ガラス、磁気記録媒体基板、磁気記録媒体および磁気記録再生装置用ガラススペーサ
WO2019221102A1 (ja) 2018-05-16 2019-11-21 Hoya株式会社 磁気記録媒体基板用ガラス、磁気記録媒体基板、磁気記録媒体、磁気記録再生装置用ガラススペーサおよび磁気記録再生装置
WO2021015240A1 (ja) 2019-07-22 2021-01-28 Hoya株式会社 磁気記録媒体基板用ガラス、磁気記録媒体基板、磁気記録媒体、磁気記録再生装置用ガラススペーサおよび磁気記録再生装置
JP2021086643A (ja) 2019-11-25 2021-06-03 日本電気硝子株式会社 磁気記録媒体用ガラス基板及びそれを用いた磁気記録装置
WO2021117897A1 (ja) 2019-12-13 2021-06-17 Hoya株式会社 磁気記録媒体基板用または磁気記録再生装置用ガラススペーサ用のガラス、磁気記録媒体基板、磁気記録媒体、磁気記録再生装置用ガラススペーサおよび磁気記録再生装置

Also Published As

Publication number Publication date
EP4585575A1 (en) 2025-07-16
CN119836403A (zh) 2025-04-15
JPWO2024053741A1 (https=) 2024-03-14
JP2026021401A (ja) 2026-02-10
WO2024053741A1 (ja) 2024-03-14

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