CA1209262A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
CA1209262A
CA1209262A CA000438300A CA438300A CA1209262A CA 1209262 A CA1209262 A CA 1209262A CA 000438300 A CA000438300 A CA 000438300A CA 438300 A CA438300 A CA 438300A CA 1209262 A CA1209262 A CA 1209262A
Authority
CA
Canada
Prior art keywords
magnetic
layer
recording medium
magnetic recording
bismuth
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
CA000438300A
Other languages
English (en)
French (fr)
Inventor
Kenichi Baba
Kenji Yazawa
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of CA1209262A publication Critical patent/CA1209262A/en
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
    • 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/851—Coating a support with a magnetic layer by sputtering
    • 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
    • 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
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12931—Co-, Fe-, or Ni-base components, alternative to each other
    • 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
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less

Landscapes

  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Thin Magnetic Films (AREA)
CA000438300A 1982-10-12 1983-10-04 Magnetic recording medium Expired CA1209262A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP57178749A JPS5968815A (ja) 1982-10-12 1982-10-12 磁気記録媒体
JP178749/82 1982-10-12

Publications (1)

Publication Number Publication Date
CA1209262A true CA1209262A (en) 1986-08-05

Family

ID=16053913

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000438300A Expired CA1209262A (en) 1982-10-12 1983-10-04 Magnetic recording medium

Country Status (7)

Country Link
US (1) US4539264A (OSRAM)
JP (1) JPS5968815A (OSRAM)
CA (1) CA1209262A (OSRAM)
DE (1) DE3336987A1 (OSRAM)
FR (1) FR2534403B1 (OSRAM)
GB (1) GB2129832A (OSRAM)
NL (1) NL8303487A (OSRAM)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60154323A (ja) * 1984-01-20 1985-08-14 Sony Corp 磁気記録媒体
JPS60157715A (ja) * 1984-01-26 1985-08-19 Tdk Corp 磁気記録媒体
JPS60160015A (ja) * 1984-01-31 1985-08-21 Sony Corp 磁気記録媒体
JPS61158025A (ja) * 1984-12-28 1986-07-17 Canon Inc 磁気記録媒体
US4816351A (en) * 1985-02-26 1989-03-28 Canon Kabushiki Kaisha Magnetic recording medium
JPS63237210A (ja) * 1987-03-25 1988-10-03 Sony Corp 磁気記録媒体
EP0421120B1 (en) * 1989-10-05 1996-10-30 International Business Machines Corporation Thin film magnetic storage medium and method for the manufacture thereof
JPH06162493A (ja) * 1992-11-18 1994-06-10 Nec Ibaraki Ltd 磁気ディスク用基板
US5399386A (en) * 1992-12-29 1995-03-21 International Business Machines Corporation In-situ texturing of a thin film magnetic medium

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1458353A (OSRAM) * 1973-01-17 1976-12-15
US4307156A (en) * 1978-06-13 1981-12-22 Nippon Electric Co., Ltd. Magnetic record member
JPS6052889B2 (ja) * 1979-06-20 1985-11-21 三菱電機株式会社 放電加工用電源装置
US4254189A (en) * 1979-07-05 1981-03-03 Memorex Corporation Disc having substrate, intermediate layer and magnetically sensitive layer wherein intermediate layer has melting point less than annealing temperature of substrate but higher than processing temperature of magnetically sensitive layer
JPS5634139A (en) * 1979-08-22 1981-04-06 Ulvac Corp Magnetic recording medium
JPS5634150A (en) * 1979-08-25 1981-04-06 Hitachi Maxell Ltd Manufacture of magnetic recording medium
DE3046564A1 (de) * 1979-12-10 1981-09-17 Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa "verfahren und vorrichtung zur vakuum-bedampfung"
JPS56143519A (en) * 1980-04-08 1981-11-09 Tdk Corp Magnetic recording medium and manufacturing device
DE3212907C2 (de) * 1981-04-06 1985-10-24 Olympus Optical Co., Ltd., Tokio/Tokyo Magnetband sowie Verfahren zu dessen Herstellung
CA1188796A (en) * 1981-04-14 1985-06-11 Kenji Yazawa Magnetic recording medium
US4450186A (en) * 1981-08-20 1984-05-22 Matsushita Electric Industrial Co., Ltd. Method and device for manufacturing magnetic recording medium

Also Published As

Publication number Publication date
GB2129832A (en) 1984-05-23
JPH044649B2 (OSRAM) 1992-01-29
NL8303487A (nl) 1984-05-01
GB8326882D0 (en) 1983-11-09
JPS5968815A (ja) 1984-04-18
FR2534403A1 (fr) 1984-04-13
FR2534403B1 (fr) 1987-03-20
US4539264A (en) 1985-09-03
DE3336987A1 (de) 1984-04-19

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Legal Events

Date Code Title Description
MKEX Expiry