SG10202111088SA - Non-magnetic substrate for magnetic disk, and magnetic disk - Google Patents

Non-magnetic substrate for magnetic disk, and magnetic disk

Info

Publication number
SG10202111088SA
SG10202111088SA SG10202111088SA SG10202111088SA SG10202111088SA SG 10202111088S A SG10202111088S A SG 10202111088SA SG 10202111088S A SG10202111088S A SG 10202111088SA SG 10202111088S A SG10202111088S A SG 10202111088SA SG 10202111088S A SG10202111088S A SG 10202111088SA
Authority
SG
Singapore
Prior art keywords
magnetic
magnetic disk
substrate
disk
magnetic substrate
Prior art date
Application number
SG10202111088SA
Inventor
Kinobu Osakabe
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 SG10202111088SA publication Critical patent/SG10202111088SA/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
    • G11B5/62—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
    • 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
    • G11B5/73913—Composites or coated substrates
    • G11B5/73915—Silicon compound based coating
    • 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
    • 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
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82—Disk carriers
SG10202111088SA 2017-03-31 2018-04-02 Non-magnetic substrate for magnetic disk, and magnetic disk SG10202111088SA (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017070232 2017-03-31

Publications (1)

Publication Number Publication Date
SG10202111088SA true SG10202111088SA (en) 2021-11-29

Family

ID=63676296

Family Applications (2)

Application Number Title Priority Date Filing Date
SG11201908015Q SG11201908015QA (en) 2017-03-31 2018-04-02 Non-magnetic substrate for magnetic disk, and magnetic disk
SG10202111088SA SG10202111088SA (en) 2017-03-31 2018-04-02 Non-magnetic substrate for magnetic disk, and magnetic disk

Family Applications Before (1)

Application Number Title Priority Date Filing Date
SG11201908015Q SG11201908015QA (en) 2017-03-31 2018-04-02 Non-magnetic substrate for magnetic disk, and magnetic disk

Country Status (7)

Country Link
US (3) US11031036B2 (en)
JP (4) JP6574537B2 (en)
CN (2) CN112002351B (en)
MY (1) MY192572A (en)
PH (1) PH12019502068B1 (en)
SG (2) SG11201908015QA (en)
WO (1) WO2018182046A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US11031036B2 (en) 2017-03-31 2021-06-08 Hoya Corporation Non-magnetic substrate for magnetic disk, and magnetic disk
MY196313A (en) * 2017-06-30 2023-03-24 Hoya Corp Substrate For Magnetic Disks, and Magnetic Disk
CN116798456A (en) * 2018-08-07 2023-09-22 Hoya株式会社 Magnetic disk substrate and magnetic disk
WO2022231013A1 (en) * 2021-04-30 2022-11-03 Hoya株式会社 Method for producing ring-shaped object, film-forming device, ring-shaped object, and hard disk drive device

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US5626943A (en) * 1994-06-02 1997-05-06 The Carborundum Company Ultra-smooth ceramic substrates and magnetic data storage media prepared therefrom
US5747135A (en) * 1995-12-08 1998-05-05 Aluminum Company Of America Thin film pretreatment for memory disks and associated methods
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US6383404B1 (en) * 1998-08-19 2002-05-07 Hoya Corporation Glass substrate for magnetic recording medium, magnetic recording medium, and method of manufacturing the same
US6316097B1 (en) * 1998-09-28 2001-11-13 Seagate Technology Llc Electroless plating process for alternative memory disk substrates
JP2003016633A (en) * 2001-06-28 2003-01-17 Asahi Glass Co Ltd Glass substrate for magnetic disk and method for manufacturing the same
JP2003263713A (en) * 2002-03-08 2003-09-19 Canon Inc Cylindrical magnetic recording medium and its manufacturing method
CN100538827C (en) * 2004-03-25 2009-09-09 Hoya株式会社 Glass substrate for disc
JP2005322364A (en) * 2004-05-11 2005-11-17 Fuji Electric Device Technology Co Ltd Disk substrate for vertical magnetic recording medium, vertical magnetic recording medium using substrate and manufacturing method thereof
JP2005346880A (en) 2004-06-07 2005-12-15 Toshiba Corp Magnetic recording and reproducing apparatus
WO2006019125A1 (en) 2004-08-16 2006-02-23 Showa Denko K.K. Silicon substrate for magnetic recording medium, method of manufacturing the silicon substrate, and magnetic recording medium
US7573674B1 (en) * 2004-12-23 2009-08-11 Maxtor Corporation Storage disk having increased damping characteristics in a disk drive
JP2006260700A (en) 2005-03-18 2006-09-28 Fujitsu Ltd Magnetic recording medium and magnetic recording apparatus
JP2006302358A (en) 2005-04-18 2006-11-02 Kobe Steel Ltd Aluminum alloy substrate for magnetic recording medium and magnetic recording medium
JP2007066390A (en) * 2005-08-30 2007-03-15 Konica Minolta Opto Inc Substrate for magnetic recording medium and method for manufacturing substrate for magnetic recording medium
JP4665886B2 (en) * 2006-10-27 2011-04-06 富士電機デバイステクノロジー株式会社 Perpendicular magnetic recording medium, perpendicular magnetic recording medium substrate, and manufacturing method thereof
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CN107256712B (en) * 2012-09-28 2020-04-14 Hoya株式会社 Glass substrate for magnetic disk, method for producing same, magnetic disk, and annular glass substrate
MY166438A (en) 2012-12-29 2018-06-27 Hoya Corp Glass substrate for magnetic disk and magnetic disk
US9595286B2 (en) 2013-03-01 2017-03-14 Hoya Corporation Glass substrate for magnetic disk and magnetic disk
JP5762612B1 (en) 2014-09-27 2015-08-12 株式会社Uacj Aluminum alloy plate for magnetic disk substrate, manufacturing method thereof, and manufacturing method of magnetic disk
MY183917A (en) 2014-12-31 2021-03-17 Hoya Corp Method for manufacturing magnetic-disk substrate, and grindstone for grinding
JP2016126808A (en) 2014-12-31 2016-07-11 Hoya株式会社 Method for manufacturing substrate for magnetic disk and end surface polishing device
JP2017199442A (en) 2016-04-25 2017-11-02 旭硝子株式会社 Method of manufacturing substrate for magnetic recording medium, and packing body of substrate for magnetic recording medium
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
JP6832179B2 (en) * 2017-02-03 2021-02-24 昭和電工株式会社 Magnetic recording medium board and hard disk drive
US11031036B2 (en) * 2017-03-31 2021-06-08 Hoya Corporation Non-magnetic substrate for magnetic disk, and magnetic disk
MY196313A (en) * 2017-06-30 2023-03-24 Hoya Corp Substrate For Magnetic Disks, and Magnetic Disk

Also Published As

Publication number Publication date
JPWO2018182046A1 (en) 2019-11-07
CN110326042A (en) 2019-10-11
JP6574537B2 (en) 2019-09-11
CN112002351A (en) 2020-11-27
JP2023027179A (en) 2023-03-01
JP7465332B2 (en) 2024-04-10
JP2019215951A (en) 2019-12-19
CN112002351B (en) 2022-02-08
MY192572A (en) 2022-08-29
JP2022028852A (en) 2022-02-16
US20210264943A1 (en) 2021-08-26
JP7191185B2 (en) 2022-12-16
PH12019502068A1 (en) 2020-10-26
US11031036B2 (en) 2021-06-08
US11955151B2 (en) 2024-04-09
US20200035268A1 (en) 2020-01-30
WO2018182046A1 (en) 2018-10-04
US11545178B2 (en) 2023-01-03
SG11201908015QA (en) 2019-10-30
US20230121742A1 (en) 2023-04-20
CN110326042B (en) 2020-09-11
JP6983842B2 (en) 2021-12-17
PH12019502068B1 (en) 2020-10-26

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