MY208527A - Substrate for magnetic disk and magnetic disk - Google Patents

Substrate for magnetic disk and magnetic disk

Info

Publication number
MY208527A
MY208527A MYPI2021000408A MYPI2021000408A MY208527A MY 208527 A MY208527 A MY 208527A MY PI2021000408 A MYPI2021000408 A MY PI2021000408A MY PI2021000408 A MYPI2021000408 A MY PI2021000408A MY 208527 A MY208527 A MY 208527A
Authority
MY
Malaysia
Prior art keywords
magnetic disk
substrate
disk
gpa
thickness
Prior art date
Application number
MYPI2021000408A
Other languages
English (en)
Inventor
Shinji Eda
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 MY208527A publication Critical patent/MY208527A/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • 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
    • 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
    • G11B5/73917—Metallic substrates, i.e. elemental metal or metal alloy 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
    • G11B5/62—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
    • G11B5/73917—Metallic substrates, i.e. elemental metal or metal alloy substrates
    • G11B5/73919—Aluminium or titanium elemental or alloy substrates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Metallurgy (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Glass Compositions (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)
MYPI2021000408A 2018-08-07 2019-08-07 Substrate for magnetic disk and magnetic disk MY208527A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2018148923 2018-08-07
JP2019009901 2019-01-24
PCT/JP2019/031269 WO2020032146A1 (ja) 2018-08-07 2019-08-07 磁気ディスク用基板及び磁気ディスク

Publications (1)

Publication Number Publication Date
MY208527A true MY208527A (en) 2025-05-14

Family

ID=69414888

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2021000408A MY208527A (en) 2018-08-07 2019-08-07 Substrate for magnetic disk and magnetic disk

Country Status (6)

Country Link
US (4) US11640833B2 (https=)
JP (5) JP6975862B2 (https=)
CN (2) CN112513985B (https=)
MY (1) MY208527A (https=)
SG (1) SG11202100827XA (https=)
WO (1) WO2020032146A1 (https=)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
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MY208527A (en) 2018-08-07 2025-05-14 Hoya Corp Substrate for magnetic disk and magnetic disk
JP7037600B2 (ja) * 2020-07-03 2022-03-16 株式会社Uacj 磁気ディスク用基板及び当該磁気ディスク用基板を用いた磁気ディスク
JP6985487B1 (ja) * 2020-12-08 2021-12-22 株式会社Uacj 磁気ディスク基板および磁気ディスク
JPWO2023100893A1 (https=) * 2021-12-01 2023-06-08
JP7717846B2 (ja) * 2022-01-11 2025-08-04 古河電気工業株式会社 磁気ディスク用基板及びこれを用いた磁気ディスク
JP7113157B1 (ja) * 2022-03-30 2022-08-04 古河電気工業株式会社 磁気ディスク及び磁気ディスク用基板
CN120937077A (zh) * 2023-03-31 2025-11-11 豪雅株式会社 信息记录介质用盘、盘中间体及信息记录介质用基板
WO2025143137A1 (ja) * 2023-12-27 2025-07-03 Hoya株式会社 情報記録媒体用ディスク

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Also Published As

Publication number Publication date
US20210256999A1 (en) 2021-08-19
JP2024157052A (ja) 2024-11-06
US12475924B2 (en) 2025-11-18
US20240296867A1 (en) 2024-09-05
JPWO2020032146A1 (ja) 2021-05-13
CN112513985A (zh) 2021-03-16
JP2022010156A (ja) 2022-01-14
CN116798456A (zh) 2023-09-22
JP7545526B2 (ja) 2024-09-04
WO2020032146A1 (ja) 2020-02-13
JP7286735B2 (ja) 2023-06-05
JP2023106546A (ja) 2023-08-01
US20260065934A1 (en) 2026-03-05
JP6975862B2 (ja) 2021-12-01
US11640833B2 (en) 2023-05-02
SG11202100827XA (en) 2021-03-30
JP7733785B2 (ja) 2025-09-03
CN112513985B (zh) 2023-07-28
JP2025166243A (ja) 2025-11-05
US20230253012A1 (en) 2023-08-10
US12020735B2 (en) 2024-06-25

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