SG165301A1 - Perpendicular magnetic recording medium - Google Patents

Perpendicular magnetic recording medium

Info

Publication number
SG165301A1
SG165301A1 SG201002261-4A SG2010022614A SG165301A1 SG 165301 A1 SG165301 A1 SG 165301A1 SG 2010022614 A SG2010022614 A SG 2010022614A SG 165301 A1 SG165301 A1 SG 165301A1
Authority
SG
Singapore
Prior art keywords
magnetic recording
recording layer
underlayer
layer
soft magnetic
Prior art date
Application number
SG201002261-4A
Other languages
English (en)
Inventor
Takahiro Onoue
Original Assignee
Wd Media 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 Wd Media Singapore Pte Ltd filed Critical Wd Media Singapore Pte Ltd
Publication of SG165301A1 publication Critical patent/SG165301A1/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
    • G11B5/674—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 differing macroscopic or microscopic structures, e.g. differing crystalline lattices, varying atomic structures or differing roughnesses
    • 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
    • G11B5/73—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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82—Disk carriers
SG201002261-4A 2009-03-31 2010-03-31 Perpendicular magnetic recording medium SG165301A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009087759 2009-03-31
JP2010077948A JP5645443B2 (ja) 2009-03-31 2010-03-30 垂直磁気記録媒体

Publications (1)

Publication Number Publication Date
SG165301A1 true SG165301A1 (en) 2010-10-28

Family

ID=42784631

Family Applications (1)

Application Number Title Priority Date Filing Date
SG201002261-4A SG165301A1 (en) 2009-03-31 2010-03-31 Perpendicular magnetic recording medium

Country Status (3)

Country Link
US (1) US8895163B2 (ja)
JP (1) JP5645443B2 (ja)
SG (1) SG165301A1 (ja)

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Also Published As

Publication number Publication date
JP5645443B2 (ja) 2014-12-24
US8895163B2 (en) 2014-11-25
US20100247965A1 (en) 2010-09-30
JP2010257566A (ja) 2010-11-11

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