JP2020087497A - 磁気記録媒体とその製造方法 - Google Patents

磁気記録媒体とその製造方法 Download PDF

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Publication number
JP2020087497A
JP2020087497A JP2018225870A JP2018225870A JP2020087497A JP 2020087497 A JP2020087497 A JP 2020087497A JP 2018225870 A JP2018225870 A JP 2018225870A JP 2018225870 A JP2018225870 A JP 2018225870A JP 2020087497 A JP2020087497 A JP 2020087497A
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JP
Japan
Prior art keywords
magnetic
recording medium
layer
particles
medium according
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.)
Pending
Application number
JP2018225870A
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English (en)
Japanese (ja)
Other versions
JP2020087497A5 (https=
Inventor
笹栗　大助
Daisuke Sasakuri
大助 笹栗
西村　直樹
Naoki Nishimura
直樹 西村
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP2018225870A priority Critical patent/JP2020087497A/ja
Priority to PCT/JP2019/044806 priority patent/WO2020110768A1/ja
Publication of JP2020087497A publication Critical patent/JP2020087497A/ja
Publication of JP2020087497A5 publication Critical patent/JP2020087497A5/ja
Pending legal-status Critical Current

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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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/712—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the surface treatment or coating of magnetic particles
    • 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/852—Orientation in a magnetic field

Landscapes

  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
JP2018225870A 2018-11-30 2018-11-30 磁気記録媒体とその製造方法 Pending JP2020087497A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2018225870A JP2020087497A (ja) 2018-11-30 2018-11-30 磁気記録媒体とその製造方法
PCT/JP2019/044806 WO2020110768A1 (ja) 2018-11-30 2019-11-15 磁気記録媒体とその製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018225870A JP2020087497A (ja) 2018-11-30 2018-11-30 磁気記録媒体とその製造方法

Publications (2)

Publication Number Publication Date
JP2020087497A true JP2020087497A (ja) 2020-06-04
JP2020087497A5 JP2020087497A5 (https=) 2022-01-06

Family

ID=70853191

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018225870A Pending JP2020087497A (ja) 2018-11-30 2018-11-30 磁気記録媒体とその製造方法

Country Status (2)

Country Link
JP (1) JP2020087497A (https=)
WO (1) WO2020110768A1 (https=)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05250651A (ja) * 1992-03-03 1993-09-28 Fujitsu Ltd 垂直磁気記録媒体
JP2001006151A (ja) * 1999-06-23 2001-01-12 Fuji Photo Film Co Ltd 磁気記録媒体
JP2008140460A (ja) * 2006-11-30 2008-06-19 Toshiba Corp 垂直磁気記録媒体及び磁気記録再生装置
JP2011029620A (ja) * 2009-06-24 2011-02-10 Univ Of Tokyo 磁性薄膜の製造方法、磁性薄膜及び磁性体
WO2018062478A1 (ja) * 2016-09-30 2018-04-05 Ｄｏｗａエレクトロニクス株式会社 イプシロン型鉄酸化物磁性粒子及びその製造方法、磁性粒子から構成される磁性粉ならびに磁性塗料および磁気記録媒体
JP2018110045A (ja) * 2016-12-28 2018-07-12 マクセルホールディングス株式会社 磁気記録媒体
WO2018203468A1 (ja) * 2017-05-01 2018-11-08 ソニー株式会社 磁気記録媒体
JP2018181396A (ja) * 2017-04-20 2018-11-15 マクセルホールディングス株式会社 高記録密度用磁気記録媒体及びその記録再生機構

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05250651A (ja) * 1992-03-03 1993-09-28 Fujitsu Ltd 垂直磁気記録媒体
JP2001006151A (ja) * 1999-06-23 2001-01-12 Fuji Photo Film Co Ltd 磁気記録媒体
JP2008140460A (ja) * 2006-11-30 2008-06-19 Toshiba Corp 垂直磁気記録媒体及び磁気記録再生装置
JP2011029620A (ja) * 2009-06-24 2011-02-10 Univ Of Tokyo 磁性薄膜の製造方法、磁性薄膜及び磁性体
WO2018062478A1 (ja) * 2016-09-30 2018-04-05 Ｄｏｗａエレクトロニクス株式会社 イプシロン型鉄酸化物磁性粒子及びその製造方法、磁性粒子から構成される磁性粉ならびに磁性塗料および磁気記録媒体
JP2018110045A (ja) * 2016-12-28 2018-07-12 マクセルホールディングス株式会社 磁気記録媒体
JP2018181396A (ja) * 2017-04-20 2018-11-15 マクセルホールディングス株式会社 高記録密度用磁気記録媒体及びその記録再生機構
WO2018203468A1 (ja) * 2017-05-01 2018-11-08 ソニー株式会社 磁気記録媒体

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WO2020110768A1 (ja) 2020-06-04

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