WO2008123445A1 - 垂直磁気記録媒体およびその製造方法 - Google Patents

垂直磁気記録媒体およびその製造方法 Download PDF

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Publication number
WO2008123445A1
WO2008123445A1 PCT/JP2008/056171 JP2008056171W WO2008123445A1 WO 2008123445 A1 WO2008123445 A1 WO 2008123445A1 JP 2008056171 W JP2008056171 W JP 2008056171W WO 2008123445 A1 WO2008123445 A1 WO 2008123445A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic recording
peak
layer
vertical magnetic
manufacturing
Prior art date
Application number
PCT/JP2008/056171
Other languages
English (en)
French (fr)
Inventor
Teiichiro Umezawa
Masafumi Ishiyama
Kenji Ayama
Tokichiro Sato
Original Assignee
Hoya Corporation
Hoya Magnetics Singapore Pte. Ltd
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 Corporation, Hoya Magnetics Singapore Pte. Ltd filed Critical Hoya Corporation
Priority to US12/594,092 priority Critical patent/US8309239B2/en
Publication of WO2008123445A1 publication Critical patent/WO2008123445A1/ja
Priority to US13/164,186 priority patent/US20110244119A1/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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/667—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers including a soft magnetic layer
    • 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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/672—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having different compositions in a plurality of magnetic layers, e.g. layer compositions having differing elemental components or differing proportions of elements
    • 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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/676—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
    • 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
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • G11B5/727—Inorganic carbon protective coating, e.g. graphite, diamond like carbon or doped carbon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

　基体１０、磁気記録層２２、媒体保護層２６を備える、本発明の垂直磁気記録ディスク１００において、磁気記録層２２は、粒界部が形成されたグラニュラー構造の強磁性層であり、媒体保護層２６は、含有する窒素（Ｎ）と炭素（Ｃ）の原子量比（Ｎ／Ｃ）が０．０５０～０．１５０であり、かつ、波長５１４．５ｎｍのアルゴンイオンレーザ光により媒体保護層２６を励起して得られるラマンスペクトルから蛍光を除いたスペクトルの１３５０ｃｍ－１付近に現れるＤピークＤｈと１５２０ｃｍ－１付近に現れるＧピークＧｈとをガウス関数により波形分離したときのピーク比Ｄｈ／Ｇｈが０．７０～０．９５であることを特徴としている（図１０）。    
PCT/JP2008/056171 2007-03-30 2008-03-28 垂直磁気記録媒体およびその製造方法 WO2008123445A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/594,092 US8309239B2 (en) 2007-03-30 2008-03-28 Perpendicular magnetic recording medium and method of manufacturing the same
US13/164,186 US20110244119A1 (en) 2007-03-30 2011-06-20 Perpendicular magnetic recording medium and method of manufacturing the same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007-095746 2007-03-30
JP2007-095748 2007-03-30
JP2007095746 2007-03-30
JP2007095748 2007-03-30

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/164,186 Division US20110244119A1 (en) 2007-03-30 2011-06-20 Perpendicular magnetic recording medium and method of manufacturing the same

Publications (1)

Publication Number Publication Date
WO2008123445A1 true WO2008123445A1 (ja) 2008-10-16

Family

ID=39830930

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/056171 WO2008123445A1 (ja) 2007-03-30 2008-03-28 垂直磁気記録媒体およびその製造方法

Country Status (2)

Country Link
US (2) US8309239B2 (ja)
WO (1) WO2008123445A1 (ja)

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WO2009119635A1 (ja) * 2008-03-28 2009-10-01 Hoya株式会社 垂直磁気記録媒体の製造方法および垂直磁気記録媒体
JP2011138582A (ja) * 2009-12-28 2011-07-14 Wd Media Singapore Pte Ltd 垂直磁気記録媒体の製造方法

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JP5117895B2 (ja) 2008-03-17 2013-01-16 ダブリュディ・メディア・シンガポール・プライベートリミテッド 磁気記録媒体及びその製造方法
JP2009238299A (ja) 2008-03-26 2009-10-15 Hoya Corp 垂直磁気記録媒体および垂直磁気記録媒体の製造方法
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JP5574414B2 (ja) 2010-03-29 2014-08-20 ダブリュディ・メディア・シンガポール・プライベートリミテッド 磁気ディスクの評価方法及び磁気ディスクの製造方法
JP5645476B2 (ja) 2010-05-21 2014-12-24 ダブリュディ・メディア・シンガポール・プライベートリミテッド 垂直磁気ディスク
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Publication number Publication date
US20110244119A1 (en) 2011-10-06
US8309239B2 (en) 2012-11-13
US20100112379A1 (en) 2010-05-06

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