SG108964A1 - Perpendicular magnetic recording medium - Google Patents

Perpendicular magnetic recording medium

Info

Publication number
SG108964A1
SG108964A1 SG200404303A SG200404303A SG108964A1 SG 108964 A1 SG108964 A1 SG 108964A1 SG 200404303 A SG200404303 A SG 200404303A SG 200404303 A SG200404303 A SG 200404303A SG 108964 A1 SG108964 A1 SG 108964A1
Authority
SG
Singapore
Prior art keywords
recording medium
magnetic recording
perpendicular magnetic
medium
recording
Prior art date
Application number
SG200404303A
Other languages
English (en)
Inventor
Kong Kim
Osakabe Kinobu
Horikawa Junichi
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 SG108964A1 publication Critical patent/SG108964A1/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
    • G11B5/73—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
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
    • G11B5/7369—Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
    • G11B5/737—Physical structure of underlayer, e.g. texture
    • 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
SG200404303A 2003-07-25 2004-07-23 Perpendicular magnetic recording medium SG108964A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003279861A JP4169663B2 (ja) 2003-07-25 2003-07-25 垂直磁気記録媒体

Publications (1)

Publication Number Publication Date
SG108964A1 true SG108964A1 (en) 2005-02-28

Family

ID=34074759

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200404303A SG108964A1 (en) 2003-07-25 2004-07-23 Perpendicular magnetic recording medium

Country Status (3)

Country Link
US (1) US7993765B2 (ja)
JP (1) JP4169663B2 (ja)
SG (1) SG108964A1 (ja)

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Also Published As

Publication number Publication date
JP2005044464A (ja) 2005-02-17
US7993765B2 (en) 2011-08-09
US20050019608A1 (en) 2005-01-27
JP4169663B2 (ja) 2008-10-22

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