DE3681146D1 - Optisch-magnetischer aufzeichnungstraeger. - Google Patents

Optisch-magnetischer aufzeichnungstraeger.

Info

Publication number
DE3681146D1
DE3681146D1 DE8686116836T DE3681146T DE3681146D1 DE 3681146 D1 DE3681146 D1 DE 3681146D1 DE 8686116836 T DE8686116836 T DE 8686116836T DE 3681146 T DE3681146 T DE 3681146T DE 3681146 D1 DE3681146 D1 DE 3681146D1
Authority
DE
Germany
Prior art keywords
optical
magnetic recording
recording carrier
carrier
magnetic
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 - Lifetime
Application number
DE8686116836T
Other languages
English (en)
Inventor
Gotoh Akire
Umeda Jun-Ichi
Wakai Kunio
Ogihara Noriyuki
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26550228&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3681146(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP60272488A external-priority patent/JP2601796B2/ja
Priority claimed from JP60293094A external-priority patent/JP2587408B2/ja
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Application granted granted Critical
Publication of DE3681146D1 publication Critical patent/DE3681146D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • G11B11/10589—Details
    • G11B11/10591—Details for improving write-in properties, e.g. Curie-point temperature
    • 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
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
DE8686116836T 1985-12-05 1986-12-03 Optisch-magnetischer aufzeichnungstraeger. Expired - Lifetime DE3681146D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60272488A JP2601796B2 (ja) 1985-12-05 1985-12-05 光磁気記録媒体
JP60293094A JP2587408B2 (ja) 1985-12-27 1985-12-27 光磁気記録媒体

Publications (1)

Publication Number Publication Date
DE3681146D1 true DE3681146D1 (de) 1991-10-02

Family

ID=26550228

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686116836T Expired - Lifetime DE3681146D1 (de) 1985-12-05 1986-12-03 Optisch-magnetischer aufzeichnungstraeger.

Country Status (3)

Country Link
EP (1) EP0229292B2 (de)
KR (1) KR870006535A (de)
DE (1) DE3681146D1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63253555A (ja) * 1987-01-14 1988-10-20 ミネソタ　マイニング　アンド　マニユフアクチユアリング　カンパニー 安定な磁気光記録媒体
EP0331737B1 (de) * 1987-08-08 1996-06-05 Mitsui Petrochemical Industries, Ltd. Photomagnetisches speichermedium
US4950556A (en) * 1987-10-26 1990-08-21 Minnesota Mining And Manufacturing Company Magneto-optic recording medium
DE3803000A1 (de) * 1988-02-02 1989-08-10 Basf Ag Flaechenfoermiges, mehrschichtiges magneto-optisches aufzeichnungsmaterial
DE68928712T2 (de) * 1988-11-07 1998-10-15 Hitachi Maxell Magneto-optisches Speichermedium
DE3904611A1 (de) * 1989-02-16 1990-08-23 Hoechst Ag Magnetooptische schicht und verfahren zu ihrer herstellung
DE4008075A1 (de) * 1990-03-14 1991-09-19 Basf Ag Magnetooptische datenplatte
DE4029874A1 (de) * 1990-09-21 1992-03-26 Basf Ag Magnetooptische datenplatte mit pt-haltiger leseschicht
DE4137427C1 (de) * 1991-11-14 1993-01-14 Hoechst Ag, 6230 Frankfurt, De
JP3375694B2 (ja) * 1993-07-19 2003-02-10 パイオニア株式会社 光磁気ディスク及び光磁気ディスク再生装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3382791T2 (de) * 1982-12-15 1995-12-07 Sharp Kk Magneto-optischer Speicher.
JPH0670858B2 (ja) * 1983-05-25 1994-09-07 ソニー株式会社 光磁気記録媒体とその製法
CA1235485A (en) * 1984-01-20 1988-04-19 Kenji Yazawa Magnetic recording medium
DE3536210A1 (de) * 1984-10-11 1986-04-17 Hitachi, Ltd., Tokio/Tokyo Magnetooptisches aufzeichnungsmedium
JPH0618074B2 (ja) * 1984-10-25 1994-03-09 住友化学工業株式会社 磁気記録媒体
DE3611296C2 (de) * 1985-04-04 1996-09-12 Fuji Photo Film Co Ltd Magnetisches Aufzeichnungsmedium

Also Published As

Publication number Publication date
EP0229292B2 (de) 1998-09-02
KR870006535A (ko) 1987-07-13
EP0229292B1 (de) 1991-08-28
EP0229292A1 (de) 1987-07-22

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings
8339 Ceased/non-payment of the annual fee