PH12021552252A1 - Non-magnetic substrate for magnetic disk, and magnetic disk - Google Patents

Non-magnetic substrate for magnetic disk, and magnetic disk

Info

Publication number
PH12021552252A1
PH12021552252A1 PH1/2021/552252A PH12021552252A PH12021552252A1 PH 12021552252 A1 PH12021552252 A1 PH 12021552252A1 PH 12021552252 A PH12021552252 A PH 12021552252A PH 12021552252 A1 PH12021552252 A1 PH 12021552252A1
Authority
PH
Philippines
Prior art keywords
thickness
substrate
main body
magnetic
metal film
Prior art date
Application number
PH1/2021/552252A
Other languages
English (en)
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 PH12021552252A1 publication Critical patent/PH12021552252A1/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Metallurgy (AREA)
  • Ceramic Engineering (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
PH1/2021/552252A 2017-03-31 2018-04-02 Non-magnetic substrate for magnetic disk, and magnetic disk PH12021552252A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017070232 2017-03-31
PCT/JP2018/014169 WO2018182046A1 (ja) 2017-03-31 2018-04-02 磁気ディスク用非磁性基板及び磁気ディスク

Publications (1)

Publication Number Publication Date
PH12021552252A1 true PH12021552252A1 (en) 2022-05-02

Family

ID=63676296

Family Applications (2)

Application Number Title Priority Date Filing Date
PH1/2021/552252A PH12021552252A1 (en) 2017-03-31 2018-04-02 Non-magnetic substrate for magnetic disk, and magnetic disk
PH12019502068A PH12019502068B1 (en) 2017-03-31 2019-09-12 Non-magnetic substrate for magnetic disk, and magnetic disk

Family Applications After (1)

Application Number Title Priority Date Filing Date
PH12019502068A PH12019502068B1 (en) 2017-03-31 2019-09-12 Non-magnetic substrate for magnetic disk, and magnetic disk

Country Status (7)

Country Link
US (4) US11031036B2 (https=)
JP (5) JP6574537B2 (https=)
CN (2) CN112002351B (https=)
MY (1) MY192572A (https=)
PH (2) PH12021552252A1 (https=)
SG (2) SG11201908015QA (https=)
WO (1) WO2018182046A1 (https=)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
PH12021552252A1 (en) * 2017-03-31 2022-05-02 Hoya Corp Non-magnetic substrate for magnetic disk, and magnetic disk
WO2019004484A1 (ja) 2017-06-30 2019-01-03 Hoya株式会社 磁気ディスク用基板及び磁気ディスク
MY208527A (en) 2018-08-07 2025-05-14 Hoya Corp Substrate for magnetic disk and magnetic disk
CN117242520A (zh) * 2021-04-30 2023-12-15 豪雅株式会社 生产环形物体的方法、成膜装置、环形物体和硬盘驱动装置

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4882236A (en) * 1988-02-10 1989-11-21 Olin Corporation Rigid magnetic recording disks and method of producing same
JPH0757233A (ja) * 1993-08-19 1995-03-03 Hitachi Ltd 磁気記録媒体
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
JPH09198640A (ja) 1996-01-16 1997-07-31 Kobe Steel Ltd 磁気ディスク
SG84541A1 (en) * 1998-08-19 2001-11-20 Hoya Corp 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 (ja) * 2001-06-28 2003-01-17 Asahi Glass Co Ltd 磁気ディスク用ガラス基板及びその製造方法
JP2003263713A (ja) * 2002-03-08 2003-09-19 Canon Inc 円筒状磁気記録媒体およびその作製方法
WO2005093720A1 (ja) 2004-03-25 2005-10-06 Hoya Corporation 磁気ディスク用ガラス基板
JP2005322364A (ja) 2004-05-11 2005-11-17 Fuji Electric Device Technology Co Ltd 垂直磁気記録媒体用ディスク基板、該基板を用いた垂直磁気記録媒体、および、それらの製造方法
JP2005346880A (ja) * 2004-06-07 2005-12-15 Toshiba Corp 磁気記録再生装置
JP2006085887A (ja) * 2004-08-16 2006-03-30 Showa Denko Kk 磁気記録媒体用シリコン基板及びその製造方法並びに磁気記録媒体
US7573674B1 (en) * 2004-12-23 2009-08-11 Maxtor Corporation Storage disk having increased damping characteristics in a disk drive
JP2006260700A (ja) * 2005-03-18 2006-09-28 Fujitsu Ltd 磁気記録媒体及び磁気記録装置
JP2006302358A (ja) 2005-04-18 2006-11-02 Kobe Steel Ltd 磁気記録媒体用Ａｌ合金基板および磁気記録媒体
JP2007066390A (ja) * 2005-08-30 2007-03-15 Konica Minolta Opto Inc 磁気記録媒体用基板、及び磁気記録媒体用基板の製造方法
JP4665886B2 (ja) * 2006-10-27 2011-04-06 富士電機デバイステクノロジー株式会社 垂直磁気記録媒体、垂直磁気記録媒体用基板、および、それらの製造方法
JP2009160831A (ja) * 2008-01-08 2009-07-23 Fujifilm Corp パターンローラの製作方法
JP2010118111A (ja) 2008-11-12 2010-05-27 Toshiba Storage Device Corp 磁気記憶装置
AU2010357211B2 (en) * 2010-07-09 2013-09-19 Micro Motion, Inc. A vibrating meter including an improved meter case
WO2014050241A1 (ja) * 2012-09-28 2014-04-03 Hoya株式会社 磁気ディスク用ガラス基板、磁気ディスク、磁気ディスク用ガラス基板の製造方法
SG10201706182XA (en) * 2012-09-28 2017-09-28 Hoya Corp Magnetic-disk glass substrate and magnetic disk
CN107886972B (zh) * 2012-12-29 2019-12-06 Hoya株式会社 磁盘用玻璃基板和磁盘
US9595286B2 (en) 2013-03-01 2017-03-14 Hoya Corporation Glass substrate for magnetic disk and magnetic disk
JP5762612B1 (ja) 2014-09-27 2015-08-12 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、磁気ディスクの製造方法
JP6001815B1 (ja) 2014-12-31 2016-10-05 Hoya株式会社 磁気ディスク用基板の製造方法、及び研削用砥石
JP2016126808A (ja) 2014-12-31 2016-07-11 Hoya株式会社 磁気ディスク用基板の製造方法、及び端面研磨処理装置
JP2017199442A (ja) 2016-04-25 2017-11-02 旭硝子株式会社 磁気記録媒体用基板の製造方法、磁気記録媒体用基板の梱包体
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
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
PH12021552252A1 (en) * 2017-03-31 2022-05-02 Hoya Corp Non-magnetic substrate for magnetic disk, and magnetic disk
WO2019004484A1 (ja) * 2017-06-30 2019-01-03 Hoya株式会社 磁気ディスク用基板及び磁気ディスク

Also Published As

Publication number Publication date
US11031036B2 (en) 2021-06-08
PH12019502068A1 (en) 2020-10-26
US20240282337A1 (en) 2024-08-22
US20210264943A1 (en) 2021-08-26
JP6574537B2 (ja) 2019-09-11
US20200035268A1 (en) 2020-01-30
JP7465332B2 (ja) 2024-04-10
JP2019215951A (ja) 2019-12-19
WO2018182046A1 (ja) 2018-10-04
JP2022028852A (ja) 2022-02-16
CN112002351A (zh) 2020-11-27
US12548594B2 (en) 2026-02-10
US20230121742A1 (en) 2023-04-20
JP7646914B2 (ja) 2025-03-17
JP6983842B2 (ja) 2021-12-17
CN110326042A (zh) 2019-10-11
JPWO2018182046A1 (ja) 2019-11-07
US11955151B2 (en) 2024-04-09
CN110326042B (zh) 2020-09-11
US11545178B2 (en) 2023-01-03
PH12019502068B1 (en) 2020-10-26
JP7191185B2 (ja) 2022-12-16
SG11201908015QA (en) 2019-10-30
MY192572A (en) 2022-08-29
JP2024075787A (ja) 2024-06-04
SG10202111088SA (en) 2021-11-29
CN112002351B (zh) 2022-02-08
JP2023027179A (ja) 2023-03-01

Similar Documents

Publication Publication Date Title
PH12019502068B1 (en) Non-magnetic substrate for magnetic disk, and magnetic disk
PH12021552253A1 (en) Substrate for magnetic disk, and magnetic disk
GB2543194A (en) Thin film coating on mechanical face seals
IN2015DN03924A (https=)
SG11201807645SA (en) Supporting sheet and composite sheet for protective film formation
MY189095A (en) Grain-oriented electrical steel sheet and method for manufacturing grain-oriented electrical steel sheet
MY169200A (en) Magnetic-disk glass substrate, magnetic disk and method for manufacturing magnetic-disk glass substrate
MY165594A (en) Glass substrate for magnetic disk and magnetic disk
MY168621A (en) Magnetic-disk glass substrate
MX2019011429A (es) Lamina de acero con tratamiento superficial.
IN2014DE00802A (https=)
IN2014DE02341A (https=)
MX2019010840A (es) Material enchapado y metodo de fabricacion del mismo.
MY196778A (en) Fine copper particles, method for producing fine copper particles and method for producing sintered body
MY201888A (en) Hard disk substrate and hard disk device including the hard disk substrate
MY168096A (en) Magnetic-disk glass substrate, magnetic-disk glass substrate intermediate, and method for manufacturing magnetic-disk glass substrate
MX2021002578A (es) Bobinas continuas que contienen una capa de pelicula fina anodizada y sistemas y metodos para fabricar las mismas.
MX2019001159A (es) Un vastago de piston de cilindro y su metodo de fabricacion.
US9662870B2 (en) Dispensing jig and devices including same
JP2019215951A5 (https=)
IN2014DE02938A (https=)
MY200881A (en) Transparent Conductive Oxide Having An Embedded Film
WO2021061237A3 (en) Magnetic recording apparatus comprising disk with reduced thickness and reduced disk flatness
MY164342A (en) Coated Shaped Metal Material
WO2020212281A3 (fr) Composant horloger de type came