DE69420303T2 - Magneto-optisches Aufzeichnungsmedium, Verfahren zu seiner Herstellung, Verfahren zur Aufzeichnung oder Wiedergabe von Information - Google Patents

Magneto-optisches Aufzeichnungsmedium, Verfahren zu seiner Herstellung, Verfahren zur Aufzeichnung oder Wiedergabe von Information

Info

Publication number
DE69420303T2
DE69420303T2 DE69420303T DE69420303T DE69420303T2 DE 69420303 T2 DE69420303 T2 DE 69420303T2 DE 69420303 T DE69420303 T DE 69420303T DE 69420303 T DE69420303 T DE 69420303T DE 69420303 T2 DE69420303 T2 DE 69420303T2
Authority
DE
Germany
Prior art keywords
magneto
production
reproducing information
recording medium
optical recording
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
DE69420303T
Other languages
English (en)
Other versions
DE69420303D1 (de
Inventor
Naoki Nishimura
Eiichi Fujii
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Application granted granted Critical
Publication of DE69420303D1 publication Critical patent/DE69420303D1/de
Publication of DE69420303T2 publication Critical patent/DE69420303T2/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
    • G11B11/10589—Details
    • 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
    • G11B11/10504—Recording
    • 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
    • G11B11/10515—Reproducing
    • 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
DE69420303T 1993-04-23 1994-04-22 Magneto-optisches Aufzeichnungsmedium, Verfahren zu seiner Herstellung, Verfahren zur Aufzeichnung oder Wiedergabe von Information Expired - Fee Related DE69420303T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05098024A JP3078145B2 (ja) 1993-04-23 1993-04-23 光磁気記録媒体の製造方法

Publications (2)

Publication Number Publication Date
DE69420303D1 DE69420303D1 (de) 1999-10-07
DE69420303T2 true DE69420303T2 (de) 2000-03-23

Family

ID=14208356

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69420303T Expired - Fee Related DE69420303T2 (de) 1993-04-23 1994-04-22 Magneto-optisches Aufzeichnungsmedium, Verfahren zu seiner Herstellung, Verfahren zur Aufzeichnung oder Wiedergabe von Information

Country Status (4)

Country Link
US (3) US5656384A (de)
EP (1) EP0621592B1 (de)
JP (1) JP3078145B2 (de)
DE (1) DE69420303T2 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5831944A (en) 1993-02-26 1998-11-03 Canon Kabushiki Kaisha Magnetooptical recording medium and method for reproducing information from a magnetooptical recording medium having three layers
USRE38501E1 (en) 1992-08-28 2004-04-20 Canon Kabushiki Kaisha Magnetooptical recording medium and information recording and reproducing methods using the recording medium
DE69331924T2 (de) * 1992-08-28 2002-10-10 Canon Kk Magnetooptisches Aufzeichnungsmedium und Informationsaufzeichungs- und Wiedergabeverfahren damit
JP3333613B2 (ja) * 1993-12-07 2002-10-15 株式会社日立製作所 光情報記録媒体並びに光情報記録再生方法及び光情報記録再生装置
CA2142767C (en) 1994-02-21 1998-11-17 Naoki Nishimura Magneto-optical recording medium, and information reproducing method using the medium
US5771211A (en) * 1995-04-26 1998-06-23 Sanyo Electric Co., Ltd. Magneto-optical recording media having a reading layer with a specified range of temperature coefficients of a kerr rotation angle
JPH09120595A (ja) * 1995-10-23 1997-05-06 Sharp Corp 光磁気記録媒体
JPH10149595A (ja) * 1996-09-18 1998-06-02 Canon Inc 磁壁を移動させて情報の再生を行う情報再生装置
JPH10149592A (ja) * 1996-09-19 1998-06-02 Canon Inc 磁壁移動を利用して情報を再生する光磁気記録媒体および信号再生方法
JPH10172190A (ja) * 1996-12-09 1998-06-26 Sharp Corp 光磁気記録媒体及びその製造方法
JPH11134732A (ja) 1997-08-29 1999-05-21 Canon Inc 情報記録再生方法
US6111784A (en) * 1997-09-18 2000-08-29 Canon Kabushiki Kaisha Magnetic thin film memory element utilizing GMR effect, and recording/reproduction method using such memory element
JP2001143338A (ja) 1998-12-21 2001-05-25 Canon Inc 光磁気再生装置
US7035138B2 (en) * 2000-09-27 2006-04-25 Canon Kabushiki Kaisha Magnetic random access memory having perpendicular magnetic films switched by magnetic fields from a plurality of directions
WO2003107340A1 (en) * 2002-06-17 2003-12-24 Koninklijke Philips Electronics N.V. Dynamic copy window control for domain expansion reading

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0278042A (ja) * 1988-09-14 1990-03-19 Mitsubishi Electric Corp 光磁気記録媒体及びこれに用いる装置
JP2839783B2 (ja) * 1991-04-17 1998-12-16 シャープ株式会社 光磁気記録媒体、再生装置及び再生方法
JP2812817B2 (ja) * 1991-07-08 1998-10-22 シャープ株式会社 光磁気記録媒体
JP3093340B2 (ja) * 1991-07-23 2000-10-03 キヤノン株式会社 光磁気記録媒体
JP3171882B2 (ja) * 1991-08-01 2001-06-04 株式会社東芝 光磁気記録媒体に対する記録再生方法
JPH0589536A (ja) * 1991-09-30 1993-04-09 Toshiba Corp 光磁気記録媒体
JP2795567B2 (ja) * 1991-11-25 1998-09-10 シャープ株式会社 光磁気ディスク及び再生方法
DE69331924T2 (de) * 1992-08-28 2002-10-10 Canon Kk Magnetooptisches Aufzeichnungsmedium und Informationsaufzeichungs- und Wiedergabeverfahren damit
JP2986622B2 (ja) * 1992-09-02 1999-12-06 シャープ株式会社 光磁気メモリー素子およびその記録再生方法
JP2938284B2 (ja) * 1992-10-06 1999-08-23 シャープ株式会社 光磁気記録媒体及びこれを用いた記録再生方法
JP2857002B2 (ja) * 1993-01-07 1999-02-10 シャープ株式会社 光磁気記憶装置
US5563852A (en) * 1993-12-06 1996-10-08 Sharp Kabushiki Kaisha Magneto-optical recording medium having a readout layer with varying composition and curie temperature

Also Published As

Publication number Publication date
US5793712A (en) 1998-08-11
EP0621592B1 (de) 1999-09-01
US5656384A (en) 1997-08-12
JP3078145B2 (ja) 2000-08-21
EP0621592A3 (de) 1995-03-08
JPH06309715A (ja) 1994-11-04
EP0621592A2 (de) 1994-10-26
US5810979A (en) 1998-09-22
DE69420303D1 (de) 1999-10-07

Similar Documents

Publication Publication Date Title
DE68922185D1 (de) Optischer Informationsaufzeichnungsträger und Verfahren zu seiner Herstellung.
DE69122916D1 (de) Informationsaufzeichnungsmedium und Verfahren zu seiner Herstellung
DE69332352T2 (de) Magnetisches Aufzeichnungsmedium und Verfahren zu seiner Herstellung
DE69022826D1 (de) Magnetischer Aufzeichnungsträger und Verfahren zu seiner Herstellung.
DE69225861D1 (de) Verfahren zur Aufzeichnung von Information, Verfahren zur Wiedergabe aufgezeichneter Information und Gerät und Aufzeichnunsmedium dafür
DE69428305D1 (de) Optisches Informationsaufzeichnungsmedium und Verfahren zu dessen Herstellung
DE69021143D1 (de) Verfahren zur wirksamen Verwendung von auswechselbaren Aufzeichnungsmedien für Daten.
DE68927280D1 (de) Verfahren zur Informationsaufzeichnung und -wiedergabe, Vorrichtung dazu und Aufzeichnungsmedium
DE69416702D1 (de) Magnetooptischer Aufzeichnungsträger und Verfahren zur Informationswiedergabe
DE69420303D1 (de) Magneto-optisches Aufzeichnungsmedium, Verfahren zu seiner Herstellung, Verfahren zur Aufzeichnung oder Wiedergabe von Information
DE69027103D1 (de) Optisches Aufzeichnungsmedium und Verfahren zur Aufzeichnungs und Wiedergabe von Informationen darauf
DE69429837T2 (de) Verfahren zur Aufzeichnung von Informationssignalen
DE69427678T2 (de) Magnetooptisches Aufzeichnungsmedium und Verfahren zu seiner Herstellung
DE69322232D1 (de) Informationen aufzeichnendes Medium, Verfahren zu seiner Herstellung und seine Verwendung
DE69323971D1 (de) Target für magnetooptische Aufzeichnungsmedien und Verfahren zu seiner Herstellung
DE3581378D1 (de) Senkrecht magnetisiertes aufzeichnungsmedium und verfahren zu seiner herstellung.
DE69119045D1 (de) Verfahren zur herstellung von aufnahme- und/oder wiedergabeköpfen für magnetische aufnahme
DE69719929T2 (de) Magnetooptisches Aufzeichnungsmedium nur für die Wiedergabe, sowie Verfahren zu seiner Herstellung und Verfahren zur Wiedergabe von demselben
DE69111100D1 (de) Verfahren zur Aufzeichnung von Servoinformation.
DE69419868D1 (de) Magnetisches Aufzeichnungsmedium, Verfahren zur Herstellung desselben
DE68929107D1 (de) Optisches Datenaufzeichnungsmedium und Verfahren zu seiner Herstellung.
DE69522128T2 (de) Verfahren und Gerät zur Aufzeichnung und/oder Wiedergabe von Daten, und bandförmiges Aufzeichnungsmedium
DE68919753D1 (de) Magnetischer Aufzeichnungsträger und Verfahren zu seiner Herstellung.
DE3578247D1 (de) Medium und verfahren zur informationsaufzeichnung.
DE69432002T2 (de) Target für ein magnetooptisches Aufzeichnungsmedium und Verfahren zu seiner Herstellung

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee