DE69423404D1 - Magnetooptisches Aufzeichnungsmedium - Google Patents

Magnetooptisches Aufzeichnungsmedium

Info

Publication number
DE69423404D1
DE69423404D1 DE69423404T DE69423404T DE69423404D1 DE 69423404 D1 DE69423404 D1 DE 69423404D1 DE 69423404 T DE69423404 T DE 69423404T DE 69423404 T DE69423404 T DE 69423404T DE 69423404 D1 DE69423404 D1 DE 69423404D1
Authority
DE
Germany
Prior art keywords
magneto
recording medium
optical recording
optical
medium
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 - Fee Related
Application number
DE69423404T
Other languages
English (en)
Other versions
DE69423404T2 (de
Inventor
Tsutomu Tanaka
Haruhiko Izumi
Tomonori Ikeya
Keiji Shono
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Application granted granted Critical
Publication of DE69423404D1 publication Critical patent/DE69423404D1/de
Publication of DE69423404T2 publication Critical patent/DE69423404T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B11/10502—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 characterised by the transducing operation to be executed
    • G11B11/1053—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 characterised by the transducing operation to be executed to compensate for the magnetic domain drift or time shift
    • 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
    • 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
DE69423404T 1993-09-02 1994-04-07 Magnetooptisches Aufzeichnungsmedium Expired - Fee Related DE69423404T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5218708A JP2664330B2 (ja) 1993-09-02 1993-09-02 光磁気記録媒体

Publications (2)

Publication Number Publication Date
DE69423404D1 true DE69423404D1 (de) 2000-04-20
DE69423404T2 DE69423404T2 (de) 2000-12-07

Family

ID=16724187

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69423404T Expired - Fee Related DE69423404T2 (de) 1993-09-02 1994-04-07 Magnetooptisches Aufzeichnungsmedium

Country Status (4)

Country Link
US (1) US5663936A (de)
EP (1) EP0642126B1 (de)
JP (1) JP2664330B2 (de)
DE (1) DE69423404T2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3414823B2 (ja) * 1994-03-15 2003-06-09 富士通株式会社 光磁気記録媒体
JP2000228040A (ja) * 1999-02-04 2000-08-15 Sony Corp 光磁気記録媒体

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5778652A (en) * 1980-11-01 1982-05-17 Daido Steel Co Ltd Thermal magnetic recording carrier and thermal magnetic recording system
JPS5873030A (ja) * 1981-10-27 1983-05-02 Kokusai Denshin Denwa Co Ltd <Kdd> 光磁気記録媒体
JPS60243840A (ja) * 1984-05-18 1985-12-03 Fujitsu Ltd 光磁気記録体
US4801499A (en) * 1985-01-24 1989-01-31 Seiko Epson Corporation Optical recording medium
US4871614A (en) * 1986-07-09 1989-10-03 Canon Kabushiki Kaisha Opto-magnetic recording medium having three exchange-coupled magnetic layers
JPH0795377B2 (ja) * 1987-05-14 1995-10-11 三菱電機株式会社 光熱磁気記録媒体
US5248565A (en) * 1987-01-26 1993-09-28 Mitsubishi Denki Kabushiki Kaisha Optical-thermal magnetic storage medium
JPS63222351A (ja) * 1987-03-11 1988-09-16 Fujitsu Ltd 光磁気デイスク
US5400307A (en) * 1987-08-26 1995-03-21 Sony Corporation Magneto-optical recording medium with stacked layer structure
JPH01149246A (ja) * 1987-12-04 1989-06-12 Sony Corp 光磁気記録媒体
DE68926826T2 (de) * 1988-02-22 1996-12-12 Canon Kk Zweischichtiger magneto-optischer Aufzeichnungsträger mit einer Schicht niedriger Koerzitivkraft, bestehend aus Gd und mindestens Tb oder Dy
JPH01237945A (ja) * 1988-03-18 1989-09-22 Canon Inc 光磁気記録媒体
KR900008471A (ko) * 1988-11-07 1990-06-04 미다 가쓰시게 광자기 디스크
DE3904611A1 (de) * 1989-02-16 1990-08-23 Hoechst Ag Magnetooptische schicht und verfahren zu ihrer herstellung
US5168482A (en) * 1989-08-31 1992-12-01 Sony Corporation Magnetooptical recording and playback method employing multi-layer recording medium with record holding layer and playback layer
JPH03237635A (ja) * 1990-02-14 1991-10-23 Fuji Photo Film Co Ltd 光磁気記録媒体
CA2038785C (en) * 1990-03-27 1998-09-29 Atsushi Oyamatsu Magneto-optical recording medium
KR920005087A (ko) * 1990-08-17 1992-03-28 야마무라 가쯔미 광자기 기록 및 재생 방법과 장치
EP0482606B1 (de) * 1990-10-26 1995-08-16 Teijin Limited Magnetooptisches Aufzeichnungsmedium

Also Published As

Publication number Publication date
US5663936A (en) 1997-09-02
DE69423404T2 (de) 2000-12-07
EP0642126B1 (de) 2000-03-15
EP0642126A3 (de) 1995-03-15
EP0642126A2 (de) 1995-03-08
JP2664330B2 (ja) 1997-10-15
JPH0773520A (ja) 1995-03-17

Similar Documents

Publication Publication Date Title
DE69226041T2 (de) Magneto-optisches Aufzeichnungsmedium
DE69434923D1 (de) Aufzeichnungsmedium
DE69417806T2 (de) Magnetooptischer Aufzeichnungsträger
DE69323162D1 (de) Magnetooptischer Aufzeichnungsträger
DE69402216T2 (de) Magnetisches Aufzeichnungsmedium
DE69421234D1 (de) Magnetooptisches Aufzeichnungsmedium
DE69115426D1 (de) Magneto-optisches Aufzeichnungsmedium
DE69115963T2 (de) Magnetooptisches Aufzeichnungsmedium
DE69325352D1 (de) Magnetooptisches Aufzeichnungsmedium
DE69222988D1 (de) Magnetooptisches Aufzeichnungsmedium
DE69122977T2 (de) Magnetooptisches Aufzeichnungsmedium
DE69130441D1 (de) Magnetooptischer Aufzeichnungsträger
DE69421299D1 (de) Magneto-optisches Aufzeichnungsmedium
DE69322222T2 (de) Magnetooptischer Aufzeichnungsträger
DE69223468D1 (de) Magnetooptisches Aufzeichnungsmedium
DE69125919D1 (de) Magneto-optisches Aufzeichnungsmedium
DE69217302T2 (de) Magneto-optisches Aufzeichnungsmedium
DE69320751T2 (de) Magnetooptischer Aufzeichnungsträger
DE59208108D1 (de) Magnetooptisches Aufzeichnungsmedium
DE69224947T2 (de) Magnetooptisches Aufzeichnungsmedium
DE69423404T2 (de) Magnetooptisches Aufzeichnungsmedium
DE69229611D1 (de) Magneto-optisches Aufzeichnungsmedium
DE69207804T2 (de) Magnetooptischer Aufzeichnungsträger
DE59409334D1 (de) Magnetooptisches Aufzeichnungsmedium
DE69125257D1 (de) Magnetooptischer Aufzeichnungsträger

Legal Events

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

Representative=s name: SEEGER SEEGER LINDNER PARTNERSCHAFT PATENTANWAELTE

8339 Ceased/non-payment of the annual fee