HK77789A - Thin film magnetic recording media - Google Patents

Thin film magnetic recording media

Info

Publication number
HK77789A
HK77789A HK777/89A HK77789A HK77789A HK 77789 A HK77789 A HK 77789A HK 777/89 A HK777/89 A HK 777/89A HK 77789 A HK77789 A HK 77789A HK 77789 A HK77789 A HK 77789A
Authority
HK
Hong Kong
Prior art keywords
thin film
magnetic recording
recording media
film magnetic
media
Prior art date
Application number
HK777/89A
Other languages
English (en)
Inventor
James E Opfer
Bangalore R Natarajan
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of HK77789A publication Critical patent/HK77789A/xx

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
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/656—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing Co
    • 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
    • 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
    • G11B5/7373—Non-magnetic single underlayer comprising chromium
    • 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
    • G11B5/73917—Metallic substrates, i.e. elemental metal or metal alloy substrates
    • G11B5/73919—Aluminium or titanium elemental or alloy substrates
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/928—Magnetic property
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12611—Oxide-containing component
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12826—Group VIB metal-base component
    • Y10T428/12847—Cr-base component
    • Y10T428/12854—Next to Co-, Fe-, or Ni-base component
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y10T428/24975—No layer or component greater than 5 mils thick

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Magnetic Record Carriers (AREA)
HK777/89A 1983-11-03 1989-09-28 Thin film magnetic recording media HK77789A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/549,331 US4610911A (en) 1983-11-03 1983-11-03 Thin film magnetic recording media

Publications (1)

Publication Number Publication Date
HK77789A true HK77789A (en) 1989-10-06

Family

ID=24192555

Family Applications (1)

Application Number Title Priority Date Filing Date
HK777/89A HK77789A (en) 1983-11-03 1989-09-28 Thin film magnetic recording media

Country Status (5)

Country Link
US (1) US4610911A (xx)
EP (1) EP0145157B1 (xx)
JP (1) JPH0827926B2 (xx)
DE (1) DE3476596D1 (xx)
HK (1) HK77789A (xx)

Families Citing this family (47)

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US4659605A (en) * 1984-05-16 1987-04-21 Richardson Chemical Company Electroless deposition magnetic recording media process and products produced thereby
US4816351A (en) * 1985-02-26 1989-03-28 Canon Kabushiki Kaisha Magnetic recording medium
JP2662777B2 (ja) * 1985-04-15 1997-10-15 日立マクセル株式会社 磁気記録媒体およびその製造方法
US5082747A (en) * 1985-11-12 1992-01-21 Hedgcoth Virgle L Magnetic recording disk and sputtering process and apparatus for producing same
US4758474A (en) * 1985-11-20 1988-07-19 Nec Corporation Magnetic recording member
JPS62137720A (ja) * 1985-12-10 1987-06-20 Denki Kagaku Kogyo Kk 磁気記録媒体
JP2506652B2 (ja) * 1986-02-10 1996-06-12 松下電器産業株式会社 磁気記録媒体
US4786553A (en) * 1986-03-28 1988-11-22 Hitachi, Ltd. Magnetic recording medium
JPS62236116A (ja) * 1986-04-08 1987-10-16 Denki Kagaku Kogyo Kk 磁気記録媒体
US4654276A (en) * 1986-04-29 1987-03-31 International Business Machines Corporation Magnetic recording medium with an underlayer and a cobalt-based magnetic layer
US4652499A (en) * 1986-04-29 1987-03-24 International Business Machines Magnetic recording medium with a chromium alloy underlayer and a cobalt-based magnetic layer
US4749628A (en) * 1986-04-29 1988-06-07 International Business Machines Corporation Multilayered vertical magnetic recording medium
US4752344A (en) * 1986-12-22 1988-06-21 International Business Machines Corporation Magnetic layer and method of manufacture
US4789598A (en) * 1987-01-20 1988-12-06 International Business Machines Corporation Thin film medium for horizontal magnetic recording having an improved cobalt-based alloy magnetic layer
JP2561655B2 (ja) * 1987-01-29 1996-12-11 株式会社日立製作所 面内磁気記録媒体
US4740430A (en) * 1987-02-18 1988-04-26 American Telephone And Telegraph Company, At&T Bell Laboratories Magneto-optic memory
US4786564A (en) * 1987-02-25 1988-11-22 Komag, Inc. Method for manufacturing a magnetic disk having reduced bit shift, minimized noise, increased resolution and uniform magnetic characteristics, and the resulting disk
US5153044A (en) * 1987-02-25 1992-10-06 Komag, Inc. Magnetic disk for longitudinal recording comprising an amorphous intermediate layer
US4778582A (en) * 1987-06-02 1988-10-18 International Business Machines Corporation Process for making a thin film metal alloy magnetic recording disk with a hydrogenated carbon overcoat
DE3726464A1 (de) * 1987-08-08 1989-02-16 Basf Ag Verfahren zur herstellung magnetischer aufzeichnungstraeger
US5023148A (en) * 1987-12-30 1991-06-11 Seagate Technology, Inc. Tine film cobalt-containing recording medium
JPH02161617A (ja) * 1988-03-15 1990-06-21 Ulvac Corp 面内記録型磁気記録体の製造方法
US4929514A (en) * 1988-03-22 1990-05-29 Hewlett-Packard Company Thin film media for high density longitudinal magnetic recording
JP2555683B2 (ja) * 1988-04-04 1996-11-20 日本ビクター株式会社 磁気記録媒体
US4935278A (en) * 1988-04-28 1990-06-19 International Business Machines Corporation Thin film magnetic recording disk and fabrication process
US5143794A (en) * 1988-08-10 1992-09-01 Hitachi, Ltd. Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus
US4902583A (en) * 1989-03-06 1990-02-20 Brucker Charles F Thick deposited cobalt platinum magnetic film and method of fabrication thereof
JP2513893B2 (ja) * 1989-04-26 1996-07-03 日立金属株式会社 磁気記録媒体
US5066552A (en) * 1989-08-16 1991-11-19 International Business Machines Corporation Low noise thin film metal alloy magnetic recording disk
US4960609A (en) * 1989-11-13 1990-10-02 International Business Machines Corporation Process for bonding lubricant to a thin film magnetic recording disk
US5316844A (en) * 1990-04-16 1994-05-31 Hoya Electronics Corporation Magnetic recording medium comprising an aluminum alloy substrate, now magnetic underlayers, magnetic layer, protective layer, particulate containing protective layer and lubricant layer
US5004652A (en) * 1990-08-15 1991-04-02 Hmt Technology Corporation High-coercivity thin-film recording medium and method
US5180640A (en) * 1990-10-01 1993-01-19 Komag, Inc. Magnetic recording medium comprising a magnetic alloy layer of cobalt nickel, platinum and chromium formed directly on a nickel alloy amorphous underlayer
US5149409A (en) * 1991-01-11 1992-09-22 International Business Machines Corporation Process for fabricating thin film metal alloy magnetic recording disks to selectively variable coercivities
JPH04265511A (ja) * 1991-02-19 1992-09-21 Sony Corp 磁気記録媒体
JP2566700B2 (ja) * 1991-04-08 1996-12-25 インターナショナル・ビジネス・マシーンズ・コーポレイション 薄膜記憶媒体上に潤滑剤を結合する方法
US5432012A (en) * 1992-06-30 1995-07-11 Hmt Technology Corporation Thin-film medium with compositional gradient
US5750230A (en) * 1992-11-20 1998-05-12 Hitachi, Ltd. Magnetic recording media and magnetic recording system using the same
US5723198A (en) * 1993-06-11 1998-03-03 Hitachi, Ltd. Multi-layered magnetic recording medium and magnetic recording system employing the same
US5441788A (en) * 1993-11-03 1995-08-15 Hewlett-Packard Company Method of preparing recording media for a disk drive and disk drive recording media
US6146737A (en) * 1998-09-18 2000-11-14 Hmt Technology Corporation Magnetic recording medium having a nitrogen-containing barrier layer
US6340521B1 (en) 1998-11-09 2002-01-22 Seagate Technology Llc Magnetic recording medium with protective barrier layer
JP3773104B2 (ja) * 2001-12-11 2006-05-10 富士電機デバイステクノロジー株式会社 磁気記録媒体およびその製造方法
US6808783B1 (en) 2002-01-17 2004-10-26 Maxtor Corporation Storage media with non-uniform properties
WO2004068472A1 (en) * 2003-01-27 2004-08-12 Fujitsu Limited Magnetic recording medium and magnetic storage apparatus
US7592079B1 (en) 2003-07-03 2009-09-22 Seagate Technology Llc Method to improve remanence-squareness-thickness-product and coercivity profiles in magnetic media

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US3150939A (en) * 1961-07-17 1964-09-29 Ibm High density record carrier
US3138479A (en) * 1961-12-20 1964-06-23 Burroughs Corp Method for the electroless deposition of high coercive magnetic film
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DE2250460C3 (de) * 1972-10-14 1981-09-10 Ibm Deutschland Gmbh, 7000 Stuttgart Magnetischer Aufzeichnungsträger
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Also Published As

Publication number Publication date
JPH0827926B2 (ja) 1996-03-21
DE3476596D1 (en) 1989-03-09
US4610911A (en) 1986-09-09
JPS60111323A (ja) 1985-06-17
EP0145157A1 (en) 1985-06-19
EP0145157B1 (en) 1989-02-01

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