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
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 (en) 2018-08-07 2019-08-07 Substrate for magnetic disks, and magnetic disk

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 (en)
JP (3) JP6975862B2 (en)
CN (2) CN116798456A (en)
SG (1) SG11202100827XA (en)
WO (1) WO2020032146A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6985487B1 (en) * 2020-12-08 2021-12-22 株式会社Uacj Magnetic disk board and magnetic disk
WO2023100893A1 (en) * 2021-12-01 2023-06-08 日本電気硝子株式会社 Glass substrate for magnetic recording medium, glass disk for magnetic recording medium, method for manufacturing magnetic recording medium, and method for manufacturing glass disk

Family Cites Families (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991006948A1 (en) * 1989-10-27 1991-05-16 Kabushiki Kaisha Kobe Seiko Sho Method of producing magnetic recording medium
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
US7264894B2 (en) * 1998-03-13 2007-09-04 Hoya Corporation Crystallized glass for information recording medium, crystallized glass substrate, and information recording medium using the crystallized glass substrate
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
US20030134734A1 (en) * 2001-08-08 2003-07-17 Shiro Nishimoto Press molding method for glass and manufacturing method for glass substrate using this method
US7964298B2 (en) * 2002-10-29 2011-06-21 Hoya Corporation Glass for chemical strengthening, substrate for information recording media and information recording media
JP4039381B2 (en) * 2004-03-25 2008-01-30 コニカミノルタオプト株式会社 Glass substrate for information recording medium using glass composition and information recording medium using the same
US20080020238A1 (en) * 2004-03-31 2008-01-24 Hirotaka Tanaka Magentic Disk and Glass Substrate for Magnetic Disk
JP4780607B2 (en) * 2006-01-25 2011-09-28 Ｈｏｙａ株式会社 A method for manufacturing a glass substrate for a magnetic disk, a glass substrate for a magnetic disk, and a method for manufacturing a magnetic disk.
US20080130171A1 (en) * 2006-11-30 2008-06-05 Francis Martin Behan Calcium aluminosilicate glasses for use as information recording medium substrates
KR101451197B1 (en) * 2007-06-07 2014-10-15 니폰 덴키 가라스 가부시키가이샤 Hardened glass substrate, and method for production thereof
MY177073A (en) * 2010-04-27 2020-09-04 Agc Inc Method for producing magnetic disk, and glass substrate for information recording medium
WO2012005019A1 (en) * 2010-07-08 2012-01-12 旭硝子株式会社 Glass substrate end surface evaluation method, glass substrate end surface processing method, and glass substrate
WO2012090364A1 (en) * 2010-12-28 2012-07-05 コニカミノルタオプト株式会社 Method for manufacturing glass substrate for magnetic recording medium
WO2012160897A1 (en) * 2011-05-20 2012-11-29 株式会社オハラ Method for producing polished product
JP5755054B2 (en) * 2011-05-20 2015-07-29 株式会社オハラ Substrate manufacturing method
SG11201407592YA (en) * 2012-05-16 2015-01-29 Hoya Corp Glass for magnetic recording medium substrate and usage thereof
CN108428460B (en) 2012-09-28 2020-02-21 Hoya株式会社 Magnetic disk substrate
US9583128B2 (en) * 2012-09-28 2017-02-28 Hoya Corporation Magnetic-disk glass substrate and magnetic disk
JP2014208570A (en) * 2013-03-25 2014-11-06 日本電気硝子株式会社 Tempered glass substrate and method of manufacturing the same
JP2015069670A (en) * 2013-09-30 2015-04-13 Hoya株式会社 Production method of magnetic disk glass substrate
JP6499274B2 (en) * 2015-03-31 2019-04-10 Hoya株式会社 Magnetic disk substrate, magnetic disk, and method of manufacturing magnetic disk substrate
JP6004129B1 (en) * 2016-01-07 2016-10-05 旭硝子株式会社 Glass substrate for magnetic recording medium, magnetic recording medium
WO2017188320A1 (en) * 2016-04-27 2017-11-02 株式会社Uacj Substrate for magnetic disk
WO2017204143A1 (en) * 2016-05-25 2017-11-30 旭硝子株式会社 Glass for data storage medium substrates, glass substrate for data storage medium, and magnetic disk
TWI755466B (en) * 2016-12-28 2022-02-21 日商東洋鋼鈑股份有限公司 Substrate for hard disk and hard disk device using the same
MY176367A (en) * 2017-02-01 2020-08-04 Furukawa Electric Co Ltd Aluminum alloy magnetic disk substrate and method for producing same
JP6832179B2 (en) * 2017-02-03 2021-02-24 昭和電工株式会社 Magnetic recording medium board and hard disk drive
JP6437583B2 (en) * 2017-02-27 2018-12-12 株式会社Uacj Aluminum alloy plate for magnetic disk substrate, manufacturing method thereof, and magnetic disk using the aluminum alloy plate for magnetic disk substrate
SG10202111088SA (en) * 2017-03-31 2021-11-29 Hoya Corp Non-magnetic substrate for magnetic disk, and magnetic disk
JP6389546B1 (en) * 2017-05-12 2018-09-12 株式会社Uacj Aluminum alloy substrate for magnetic disk, manufacturing method thereof, and magnetic disk using the aluminum alloy substrate for magnetic disk
CN109423564A (en) * 2017-08-28 2019-03-05 昭和电工株式会社 Magnetic recording media aluminium alloy base plate, magnetic recording media substrate, magnetic recording media and hard disk drive
JP6402229B1 (en) * 2017-09-28 2018-10-10 株式会社Uacj Aluminum alloy substrate for magnetic disk, manufacturing method thereof, and magnetic disk using the aluminum alloy substrate for magnetic disk
US11447661B2 (en) * 2017-12-27 2022-09-20 Kao Corporation Method for producing aluminum platter
JP7011944B2 (en) * 2018-01-19 2022-02-10 昭和電工株式会社 Aluminum alloy substrate for magnetic recording medium, substrate for magnetic recording medium, magnetic recording medium and hard disk drive
JP7011943B2 (en) * 2018-01-19 2022-02-10 昭和電工株式会社 Aluminum alloy substrate for magnetic recording medium and its manufacturing method, substrate for magnetic recording medium, magnetic recording medium and hard disk drive
JP6492219B1 (en) * 2018-09-21 2019-03-27 株式会社Uacj Aluminum alloy substrate for magnetic disk, method of manufacturing the same, and magnetic disk using the aluminum alloy substrate for magnetic disk
JP2022034298A (en) * 2020-08-18 2022-03-03 株式会社東芝 Disc device

Also Published As

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

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