CN112513985B - 磁盘用基板以及磁盘 - Google Patents

磁盘用基板以及磁盘 Download PDF

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Publication number
CN112513985B
CN112513985B CN201980051118.8A CN201980051118A CN112513985B CN 112513985 B CN112513985 B CN 112513985B CN 201980051118 A CN201980051118 A CN 201980051118A CN 112513985 B CN112513985 B CN 112513985B
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CN
China
Prior art keywords
substrate
magnetic disk
less
flatness
glass
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN201980051118.8A
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English (en)
Chinese (zh)
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CN112513985A (zh
Inventor
江田伸二
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
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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
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Priority to CN202310841992.XA priority Critical patent/CN116798456A/zh
Publication of CN112513985A publication Critical patent/CN112513985A/zh
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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)
CN201980051118.8A 2018-08-07 2019-08-07 磁盘用基板以及磁盘 Active CN112513985B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310841992.XA CN116798456A (zh) 2018-08-07 2019-08-07 磁盘用基板以及磁盘

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2018-148923 2018-08-07
JP2018148923 2018-08-07
JP2019-009901 2019-01-24
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

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CN202310841992.XA Division CN116798456A (zh) 2018-08-07 2019-08-07 磁盘用基板以及磁盘

Publications (2)

Publication Number Publication Date
CN112513985A CN112513985A (zh) 2021-03-16
CN112513985B true CN112513985B (zh) 2023-07-28

Family

ID=69414888

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201980051118.8A Active CN112513985B (zh) 2018-08-07 2019-08-07 磁盘用基板以及磁盘
CN202310841992.XA Pending CN116798456A (zh) 2018-08-07 2019-08-07 磁盘用基板以及磁盘

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN202310841992.XA Pending CN116798456A (zh) 2018-08-07 2019-08-07 磁盘用基板以及磁盘

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
WO2023136242A1 (ja) * 2022-01-11 2023-07-20 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
JP2022010156A (ja) 2022-01-14
JP2025166243A (ja) 2025-11-05
JP7286735B2 (ja) 2023-06-05
US20210256999A1 (en) 2021-08-19
JP2023106546A (ja) 2023-08-01
US20260065934A1 (en) 2026-03-05
CN112513985A (zh) 2021-03-16
US20240296867A1 (en) 2024-09-05
US20230253012A1 (en) 2023-08-10
JPWO2020032146A1 (ja) 2021-05-13
US11640833B2 (en) 2023-05-02
SG11202100827XA (en) 2021-03-30
JP7545526B2 (ja) 2024-09-04
CN116798456A (zh) 2023-09-22
MY208527A (en) 2025-05-14
WO2020032146A1 (ja) 2020-02-13
JP6975862B2 (ja) 2021-12-01
US12475924B2 (en) 2025-11-18
JP2024157052A (ja) 2024-11-06
US12020735B2 (en) 2024-06-25
JP7733785B2 (ja) 2025-09-03

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