DE3474225D1 - Perpendicular magnetic recording medium - Google Patents

Perpendicular magnetic recording medium

Info

Publication number
DE3474225D1
DE3474225D1 DE8484116314T DE3474225T DE3474225D1 DE 3474225 D1 DE3474225 D1 DE 3474225D1 DE 8484116314 T DE8484116314 T DE 8484116314T DE 3474225 T DE3474225 T DE 3474225T DE 3474225 D1 DE3474225 D1 DE 3474225D1
Authority
DE
Germany
Prior art keywords
recording medium
magnetic recording
perpendicular magnetic
medium
recording
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.)
Expired
Application number
DE8484116314T
Other languages
English (en)
Inventor
Akio Prof Ohtsubo
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.)
Bayer AG
Original Assignee
Bayer AG
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
Priority claimed from JP59005201A external-priority patent/JPS60150233A/ja
Priority claimed from JP23228984A external-priority patent/JPS60160016A/ja
Application filed by Bayer AG filed Critical Bayer AG
Application granted granted Critical
Publication of DE3474225D1 publication Critical patent/DE3474225D1/de
Expired legal-status Critical Current

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
    • 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
    • G11B5/716—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 two or more magnetic layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
DE8484116314T 1984-01-14 1984-12-27 Perpendicular magnetic recording medium Expired DE3474225D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59005201A JPS60150233A (ja) 1984-01-14 1984-01-14 垂直磁気記録媒体
JP23228984A JPS60160016A (ja) 1984-11-06 1984-11-06 垂直磁気記録媒体

Publications (1)

Publication Number Publication Date
DE3474225D1 true DE3474225D1 (en) 1988-10-27

Family

ID=26339105

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484116314T Expired DE3474225D1 (en) 1984-01-14 1984-12-27 Perpendicular magnetic recording medium

Country Status (4)

Country Link
US (1) US4643942A (de)
EP (1) EP0150498B1 (de)
KR (1) KR850005664A (de)
DE (1) DE3474225D1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0313063A3 (de) * 1987-10-23 1990-09-12 Kyodo Printing Co., Ltd. Magnetischer Aufzeichnungsträger
GB8817855D0 (en) * 1988-07-27 1988-09-01 Emi Plc Thorn Electromagnetic identification system
EP0646277A1 (de) * 1992-06-16 1995-04-05 The Regents Of The University Of California Supermagnetoresistive monofilm-legierungen
US5843565A (en) * 1996-10-31 1998-12-01 Ampex Corporation Particulate magnetic medium utilizing keeper technology and methods of manufacture
WO2003079332A1 (en) * 2002-03-18 2003-09-25 Hitachi Maxell, Ltd. Magnetic recording medium and magnetic recording cartridge
US6964811B2 (en) * 2002-09-20 2005-11-15 Hitachi Maxell, Ltd. Magnetic powder, method for producing the same and magnetic recording medium comprising the same
GB2422949B (en) * 2003-02-19 2007-05-30 Hitachi Maxell Magnetic recording medium
US7736765B2 (en) * 2004-12-28 2010-06-15 Seagate Technology Llc Granular perpendicular magnetic recording media with dual recording layer and method of fabricating same
US8110298B1 (en) 2005-03-04 2012-02-07 Seagate Technology Llc Media for high density perpendicular magnetic recording
US8119263B2 (en) * 2005-09-22 2012-02-21 Seagate Technology Llc Tuning exchange coupling in magnetic recording media
US8418483B2 (en) 2007-10-08 2013-04-16 Emerson Climate Technologies, Inc. System and method for calculating parameters for a refrigeration system with a variable speed compressor
US8697260B2 (en) * 2008-07-25 2014-04-15 Seagate Technology Llc Method and manufacture process for exchange decoupled first magnetic layer
US7867637B2 (en) * 2008-11-17 2011-01-11 Seagate Technology Llc Low coupling oxide media (LCOM)
US9142240B2 (en) 2010-07-30 2015-09-22 Seagate Technology Llc Apparatus including a perpendicular magnetic recording layer having a convex magnetic anisotropy profile

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3228881A (en) * 1963-01-04 1966-01-11 Chevron Res Dispersions of discrete particles of ferromagnetic metals
EP0043882A1 (de) * 1980-07-16 1982-01-20 Kodak-Pathe Magnetisches Aufzeichnungselement, Verfahren zu seiner Herstellung und seine Verwendung beim Aufzeichnen
JPS57183629A (en) * 1981-05-03 1982-11-12 Akio Otsubo Magnetic coat medium of vertical orientation and its production
JPS57195329A (en) * 1981-05-26 1982-12-01 Fuji Photo Film Co Ltd Magnetic recording medium
JPS5817539A (ja) * 1981-07-21 1983-02-01 Sony Corp 磁気記録媒体
JPS5891523A (ja) * 1981-11-25 1983-05-31 Konishiroku Photo Ind Co Ltd 磁気記録媒体
JPS58205928A (ja) * 1982-05-25 1983-12-01 Toshiba Corp 磁気記録媒体

Also Published As

Publication number Publication date
EP0150498B1 (de) 1988-09-21
KR850005664A (ko) 1985-08-28
EP0150498A2 (de) 1985-08-07
US4643942A (en) 1987-02-17
EP0150498A3 (en) 1987-09-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee