DE68917903T2 - Magneto-optischer Aufzeichnungsträger. - Google Patents

Magneto-optischer Aufzeichnungsträger.

Info

Publication number
DE68917903T2
DE68917903T2 DE1989617903 DE68917903T DE68917903T2 DE 68917903 T2 DE68917903 T2 DE 68917903T2 DE 1989617903 DE1989617903 DE 1989617903 DE 68917903 T DE68917903 T DE 68917903T DE 68917903 T2 DE68917903 T2 DE 68917903T2
Authority
DE
Germany
Prior art keywords
magneto
optical recording
recording media
media
optical
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
DE1989617903
Other languages
English (en)
Other versions
DE68917903D1 (de
Inventor
Yasuaki C O Sony Magnet Nakane
Shuichi C O Sony Magn Igarashi
Sakuya Tamada
Susumu C O Sony Magne Sakamoto
Teruo C O Sony Magnetic Chiba
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
Publication of DE68917903D1 publication Critical patent/DE68917903D1/de
Application granted granted Critical
Publication of DE68917903T2 publication Critical patent/DE68917903T2/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
    • 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
    • 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
DE1989617903 1989-03-15 1989-12-21 Magneto-optischer Aufzeichnungsträger. Expired - Lifetime DE68917903T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1062724A JP2880723B2 (ja) 1989-03-15 1989-03-15 光磁気ディスク

Publications (2)

Publication Number Publication Date
DE68917903D1 DE68917903D1 (de) 1994-10-06
DE68917903T2 true DE68917903T2 (de) 1995-04-27

Family

ID=13208599

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1989617903 Expired - Lifetime DE68917903T2 (de) 1989-03-15 1989-12-21 Magneto-optischer Aufzeichnungsträger.

Country Status (3)

Country Link
EP (1) EP0387420B1 (de)
JP (1) JP2880723B2 (de)
DE (1) DE68917903T2 (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5914198A (en) * 1989-06-05 1999-06-22 Hitachi, Ltd. Magneto-optical recording medium having dielectric layers with different indices of refraction
JP2763419B2 (ja) * 1991-07-08 1998-06-11 シャープ株式会社 光磁気記録媒体
JPH0562266A (ja) * 1991-09-05 1993-03-12 Shin Etsu Chem Co Ltd 光磁気記録媒体の製造方法
JP2960824B2 (ja) * 1992-09-30 1999-10-12 ティーディーケイ株式会社 光磁気記録媒体
JP2999895B2 (ja) * 1992-12-10 2000-01-17 シャープ株式会社 光磁気記録媒体
JPH10275369A (ja) 1997-01-31 1998-10-13 Canon Inc 情報記録媒体の製造方法および該方法による情報記録媒体
JP6691512B2 (ja) 2017-06-23 2020-04-28 富士フイルム株式会社 磁気記録媒体
WO2019065200A1 (ja) 2017-09-29 2019-04-04 富士フイルム株式会社 磁気テープおよび磁気記録再生装置
WO2019065199A1 (ja) 2017-09-29 2019-04-04 富士フイルム株式会社 磁気テープおよび磁気記録再生装置
US11514943B2 (en) 2018-03-23 2022-11-29 Fujifilm Corporation Magnetic tape and magnetic tape device
US11361793B2 (en) 2018-03-23 2022-06-14 Fujifilm Corporation Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device
US11361792B2 (en) 2018-03-23 2022-06-14 Fujifilm Corporation Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device
US11514944B2 (en) 2018-03-23 2022-11-29 Fujifilm Corporation Magnetic tape and magnetic tape device
JP6830931B2 (ja) 2018-07-27 2021-02-17 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気テープ装置
JP6784738B2 (ja) 2018-10-22 2020-11-11 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気テープ装置
JP7042737B2 (ja) 2018-12-28 2022-03-28 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気テープ装置
JP6830945B2 (ja) 2018-12-28 2021-02-17 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気テープ装置
JP7003073B2 (ja) 2019-01-31 2022-01-20 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気テープ装置
JP6778804B1 (ja) 2019-09-17 2020-11-04 富士フイルム株式会社 磁気記録媒体および磁気記録再生装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414650A (en) * 1980-06-23 1983-11-08 Sharp Kabushiki Kaisha Magneto-optic memory element
CA1224270A (en) * 1983-09-16 1987-07-14 Junji Hirokane Magneto-optic memory element
JPS62285255A (ja) * 1986-06-04 1987-12-11 Konica Corp 光磁気記録媒体
CA1303739C (en) * 1987-06-02 1992-06-16 Fred W. Spong Magneto-optic records

Also Published As

Publication number Publication date
EP0387420A2 (de) 1990-09-19
JP2880723B2 (ja) 1999-04-12
JPH02240845A (ja) 1990-09-25
DE68917903D1 (de) 1994-10-06
EP0387420A3 (de) 1991-05-08
EP0387420B1 (de) 1994-08-31

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: PATENTANWAELTE MUELLER & HOFFMANN, 81667 MUENCHEN