JPH05217233A - 光磁気記録媒体 - Google Patents

光磁気記録媒体

Info

Publication number
JPH05217233A
JPH05217233A JP4302608A JP30260892A JPH05217233A JP H05217233 A JPH05217233 A JP H05217233A JP 4302608 A JP4302608 A JP 4302608A JP 30260892 A JP30260892 A JP 30260892A JP H05217233 A JPH05217233 A JP H05217233A
Authority
JP
Japan
Prior art keywords
magneto
optical recording
recording medium
layer
medium according
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.)
Pending
Application number
JP4302608A
Other languages
English (en)
Japanese (ja)
Inventor
Michael-Joachim Dr Brekner
ミヒャエル‐ヨアヒム、ブレクナー
Egon Dr Hellstern
エゴン、ヘルシュテルン
Christoph Dr Weber
クリストフ、ウェバー
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.)
Hoechst AG
Original Assignee
Hoechst 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
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of JPH05217233A publication Critical patent/JPH05217233A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
    • 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
    • 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
    • G11B5/73923—Organic polymer substrates
    • 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
    • G11B5/73923—Organic polymer substrates
    • G11B5/73925—Composite or coated non-esterified 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
    • 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
    • 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

  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
JP4302608A 1991-11-14 1992-11-12 光磁気記録媒体 Pending JPH05217233A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4137427A DE4137427C1 (enExample) 1991-11-14 1991-11-14
DE4137427.4 1991-11-14

Publications (1)

Publication Number Publication Date
JPH05217233A true JPH05217233A (ja) 1993-08-27

Family

ID=6444775

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4302608A Pending JPH05217233A (ja) 1991-11-14 1992-11-12 光磁気記録媒体

Country Status (4)

Country Link
US (1) US5707728A (enExample)
EP (1) EP0542176B1 (enExample)
JP (1) JPH05217233A (enExample)
DE (2) DE4137427C1 (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5585989A (en) * 1993-11-30 1996-12-17 Sony Corporation Magnetic disc substrate and a magnetic disc using the same
DE19647954A1 (de) * 1996-11-20 1998-06-04 Hoechst Ag Biaxial orientierte Folie aus cycloolefinischen Polymeren, Verfahren zu deren Herstellung und deren Verwendung
US6545974B1 (en) 1998-11-18 2003-04-08 Seagate Technology Llc Disc media and methods for fabricating
US6335080B1 (en) 1999-01-04 2002-01-01 Seagate Technology Llc Magnetic disk media and disk drives utilizing polymeric disk substrates
TWI304814B (enExample) 2001-05-10 2009-01-01 Sumitomo Chemical Co

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB217516A (en) * 1923-01-05 1924-06-08 Lorenz Konrad Braren Improvements in screw making and turning lathes
DE3309483C3 (de) * 1982-03-17 2003-02-27 Canon Kk Magnetooptisches Aufzeichnungsmaterial und dessen Verwendung
US4670353A (en) * 1982-03-17 1987-06-02 Canon Kabushiki Kaisha Magnetooptical recording medium
US4614778A (en) * 1984-02-03 1986-09-30 Hirokazu Kajiura Random copolymer
DE3536210A1 (de) * 1984-10-11 1986-04-17 Hitachi, Ltd., Tokio/Tokyo Magnetooptisches aufzeichnungsmedium
KR870006535A (ko) * 1985-02-27 1987-07-13 나가이 아쯔시 광자기 기록 매체
JPS61255546A (ja) * 1985-05-09 1986-11-13 Kokusai Denshin Denwa Co Ltd <Kdd> 光磁気記録媒体
US4794560A (en) * 1985-09-30 1988-12-27 International Business Machines Corporation Eraseable self biasing thermal magneto-optic medium
US4649519A (en) * 1985-09-30 1987-03-10 International Business Machines Corporation Self biasing thermal magneto-optic medium
US4694358A (en) * 1985-10-28 1987-09-15 Kerdix, Inc. Magneto-optic recording structure and method
JPH07105082B2 (ja) * 1985-11-28 1995-11-13 ソニー株式会社 光磁気記録媒体
JPH0695404B2 (ja) * 1985-12-27 1994-11-24 ソニー株式会社 光磁気記録方法
DE3642161A1 (de) * 1986-12-10 1988-06-23 Philips Patentverwaltung Verfahren zur herstellung eines magneto-optischen speichers
US4740430A (en) * 1987-02-18 1988-04-26 American Telephone And Telegraph Company, At&T Bell Laboratories Magneto-optic memory
WO1988008192A1 (fr) * 1987-04-17 1988-10-20 Mitsui Petrochemical Industries, Ltd. Membrane d'enregistrement photomagnetique
DE68909520T2 (de) * 1988-07-07 1994-04-21 Oki Electric Ind Co Ltd Magneto-optisches Speichermedium.
CA2011590A1 (en) * 1989-03-07 1990-09-07 Koji Tsuzukiyama Optical recording media
FI81887C (fi) * 1989-03-08 1990-12-10 Tampella Oy Ab Mellanstyranordning foer bergborrningsmaskin.
CA2011384C (en) * 1989-03-09 1994-05-03 Shigenori Yanagi Track access control apparatus for optical disk apparatus
CA2017284C (en) * 1989-07-04 1995-10-03 Kazutomi Suzuki Optical recording medium
DE3922546A1 (de) * 1989-07-08 1991-01-17 Hoechst Ag Verfahren zur herstellung von cycloolefinpolymeren
CA2041032A1 (en) * 1990-04-24 1991-10-25 Kiyotaka Shindo Magnetooptical recording media

Also Published As

Publication number Publication date
US5707728A (en) 1998-01-13
EP0542176B1 (de) 1997-03-05
DE4137427C1 (enExample) 1993-01-14
EP0542176A3 (en) 1993-06-16
EP0542176A2 (de) 1993-05-19
DE59208108D1 (de) 1997-04-10

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