SG11202100827XA - Substrate for magnetic disk and magnetic disk - Google Patents

Substrate for magnetic disk and magnetic disk

Info

Publication number
SG11202100827XA
SG11202100827XA SG11202100827XA SG11202100827XA SG11202100827XA SG 11202100827X A SG11202100827X A SG 11202100827XA SG 11202100827X A SG11202100827X A SG 11202100827XA SG 11202100827X A SG11202100827X A SG 11202100827XA SG 11202100827X A SG11202100827X A SG 11202100827XA
Authority
SG
Singapore
Prior art keywords
magnetic disk
substrate
disk
magnetic
Prior art date
Application number
SG11202100827XA
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 SG11202100827XA publication Critical patent/SG11202100827XA/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)
  • Paints Or Removers (AREA)
SG11202100827XA 2018-08-07 2019-08-07 Substrate for magnetic disk and magnetic disk SG11202100827XA (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
SG11202100827XA true SG11202100827XA (en) 2021-03-30

Family

ID=69414888

Family Applications (1)

Application Number Title Priority Date Filing Date
SG11202100827XA SG11202100827XA (en) 2018-08-07 2019-08-07 Substrate for magnetic disk and magnetic disk

Country Status (5)

Country Link
US (2) US11640833B2 (ja)
JP (3) JP6975862B2 (ja)
CN (2) CN112513985B (ja)
SG (1) SG11202100827XA (ja)
WO (1) WO2020032146A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11640833B2 (en) * 2018-08-07 2023-05-02 Hoya Corporation Substrate for magnetic disk and magnetic disk
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
CN118284935A (zh) * 2021-12-01 2024-07-02 日本电气硝子株式会社 磁记录介质用玻璃基板、磁记录介质用玻璃盘、磁记录介质和玻璃盘的制造方法

Family Cites Families (47)

* Cited by examiner, † Cited by third party
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EP1577275B1 (en) * 1998-03-13 2008-12-17 Hoya Corporation Crystallized glass for information recording medium, crystallized glass substrate, and information recording medium using the crystallized glass
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
US20030134734A1 (en) * 2001-08-08 2003-07-17 Shiro Nishimoto Press molding method for glass and manufacturing method for glass substrate using this method
WO2004039738A1 (ja) * 2002-10-29 2004-05-13 Hoya Corporation 化学強化用ガラス、情報記録媒体用基板、情報記録媒体及び情報記録媒体の製造方法
JP4039381B2 (ja) * 2004-03-25 2008-01-30 コニカミノルタオプト株式会社 ガラス組成物を用いた情報記録媒体用ガラス基板及びこれを用いた情報記録媒体
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JP2006114198A (ja) * 2004-09-17 2006-04-27 Showa Denko Kk 磁気記録媒体用シリコン基板及び磁気記録媒体
JP4780607B2 (ja) 2006-01-25 2011-09-28 Ｈｏｙａ株式会社 磁気ディスク用ガラス基板の製造方法、磁気ディスク用ガラス基板、及び磁気ディスクの製造方法。
US20080130171A1 (en) * 2006-11-30 2008-06-05 Francis Martin Behan Calcium aluminosilicate glasses for use as information recording medium substrates
US8349454B2 (en) * 2007-06-07 2013-01-08 Nippon Electric Glass Co., Ltd. Strengthened glass substrate and process for producing the same
JP2010257562A (ja) * 2009-03-30 2010-11-11 Hoya Corp 磁気ディスク用基板及びその製造方法
SG178243A1 (en) * 2010-04-27 2012-03-29 Asahi Glass Co Ltd Method for producing magnetic disk and method for producing glass substrate for information recording medium
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WO2012090364A1 (ja) * 2010-12-28 2012-07-05 コニカミノルタオプト株式会社 磁気記録媒体用ガラス基板の製造方法
TW201249974A (en) * 2011-05-20 2012-12-16 Ohara Kk Method for producing polished product
JP5755054B2 (ja) * 2011-05-20 2015-07-29 株式会社オハラ 基板の製造方法
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CN106098085B (zh) * 2012-09-28 2019-07-02 Hoya株式会社 磁盘用玻璃基板、磁盘以及圆环状的玻璃坯板
SG10201706182XA (en) 2012-09-28 2017-09-28 Hoya Corp Magnetic-disk glass substrate and magnetic disk
JP2014208570A (ja) * 2013-03-25 2014-11-06 日本電気硝子株式会社 強化ガラス基板及びその製造方法
JP6131154B2 (ja) * 2013-09-11 2017-05-17 Hoya株式会社 磁気記録媒体基板用ガラスおよび磁気記録媒体基板
JP2015069670A (ja) * 2013-09-30 2015-04-13 Hoya株式会社 磁気ディスク用ガラス基板の製造方法
SG10201912466TA (en) * 2015-03-31 2020-02-27 Hoya Corp Magnetic-disk substrate, magnetic disk, and method for manufacturing magnetic-disk substrate
JP6004129B1 (ja) * 2016-01-07 2016-10-05 旭硝子株式会社 磁気記録媒体用ガラス基板、磁気記録媒体
MY176729A (en) * 2016-04-27 2020-08-20 Furukawa Electric Co Ltd Substrate for a magnetic disk
JP7056558B2 (ja) * 2016-05-25 2022-04-19 Ａｇｃ株式会社 データ記憶媒体基板用ガラス、データ記憶媒体用ガラス基板および磁気ディスク
JP6574740B2 (ja) * 2016-07-08 2019-09-11 昭和電工株式会社 磁気記録媒体用基板およびハードディスクドライブ
TWI755466B (zh) * 2016-12-28 2022-02-21 日商東洋鋼鈑股份有限公司 硬碟用基板及使用其之硬碟裝置
JP6439082B1 (ja) * 2017-02-01 2018-12-19 株式会社Uacj アルミニウム合金製の磁気ディスク基板及びその製造方法
JP6832179B2 (ja) * 2017-02-03 2021-02-24 昭和電工株式会社 磁気記録媒体用基板およびハードディスクドライブ
JP6437583B2 (ja) * 2017-02-27 2018-12-12 株式会社Uacj 磁気ディスク基板用アルミニウム合金板及びその製造方法、ならびに、この磁気ディスク基板用アルミニウム合金板を用いた磁気ディスク
US11031036B2 (en) * 2017-03-31 2021-06-08 Hoya Corporation Non-magnetic substrate for magnetic disk, and magnetic disk
JP6389546B1 (ja) * 2017-05-12 2018-09-12 株式会社Uacj 磁気ディスク用アルミニウム合金基板及びその製造方法、ならびに、この磁気ディスク用アルミニウム合金基板を用いた磁気ディスク
MY196313A (en) * 2017-06-30 2023-03-24 Hoya Corp Substrate For Magnetic Disks, and Magnetic Disk
CN109423564A (zh) * 2017-08-28 2019-03-05 昭和电工株式会社 磁记录介质用铝合金基板、磁记录介质用基板、磁记录介质和硬盘驱动器
JP6402229B1 (ja) * 2017-09-28 2018-10-10 株式会社Uacj 磁気ディスク用アルミニウム合金基板及びその製造方法、ならびに、当該磁気ディスク用アルミニウム合金基板を用いた磁気ディスク
JP6427290B1 (ja) * 2017-11-22 2018-11-21 株式会社Uacj 磁気ディスク用アルミニウム合金基板及びその製造方法、ならびに、当該磁気ディスク用アルミニウム合金基板を用いた磁気ディスク
CN109928616A (zh) * 2017-12-15 2019-06-25 成都光明光电股份有限公司 玻璃组合物
SG11202006025YA (en) * 2017-12-27 2020-07-29 Kao Corp Method for producing aluminum platter
JP7011944B2 (ja) * 2018-01-19 2022-02-10 昭和電工株式会社 磁気記録媒体用アルミニウム合金基板、磁気記録媒体用基板、磁気記録媒体およびハードディスクドライブ
JP7011943B2 (ja) * 2018-01-19 2022-02-10 昭和電工株式会社 磁気記録媒体用アルミニウム合金基板とその製造方法、磁気記録媒体用基板、磁気記録媒体およびハードディスクドライブ
US11640833B2 (en) * 2018-08-07 2023-05-02 Hoya Corporation Substrate for magnetic disk and magnetic disk
JP6492219B1 (ja) * 2018-09-21 2019-03-27 株式会社Uacj 磁気ディスク用アルミニウム合金基板及びその製造方法、ならびに、当該磁気ディスク用アルミニウム合金基板を用いた磁気ディスク
JP2020107382A (ja) * 2018-12-28 2020-07-09 昭和電工株式会社 磁気記録媒体用基板、磁気記録媒体、ハードディスクドライブ
JP2022034298A (ja) * 2020-08-18 2022-03-03 株式会社東芝 ディスク装置

Also Published As

Publication number Publication date
US20230253012A1 (en) 2023-08-10
JPWO2020032146A1 (ja) 2021-05-13
US12020735B2 (en) 2024-06-25
WO2020032146A1 (ja) 2020-02-13
CN112513985B (zh) 2023-07-28
CN116798456A (zh) 2023-09-22
JP2022010156A (ja) 2022-01-14
US20210256999A1 (en) 2021-08-19
JP6975862B2 (ja) 2021-12-01
JP2023106546A (ja) 2023-08-01
JP7286735B2 (ja) 2023-06-05
US11640833B2 (en) 2023-05-02
CN112513985A (zh) 2021-03-16

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