DE69226041D1 - Magneto-optisches Aufzeichnungsmedium - Google Patents

Magneto-optisches Aufzeichnungsmedium

Info

Publication number
DE69226041D1
DE69226041D1 DE69226041T DE69226041T DE69226041D1 DE 69226041 D1 DE69226041 D1 DE 69226041D1 DE 69226041 T DE69226041 T DE 69226041T DE 69226041 T DE69226041 T DE 69226041T DE 69226041 D1 DE69226041 D1 DE 69226041D1
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 - Lifetime
Application number
DE69226041T
Other languages
English (en)
Other versions
DE69226041T2 (de
Inventor
Akira Takahashi
Yoshiteru Murakami
Junsaku Nakajima
Kenji Ohta
Junichiro Nakayama
Hiroyuki Katayama
Michinobu Mieda
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Publication of DE69226041D1 publication Critical patent/DE69226041D1/de
Application granted granted Critical
Publication of DE69226041T2 publication Critical patent/DE69226041T2/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
    • G11B11/10589—Details
    • G11B11/10593—Details for improving read-out properties, e.g. polarisation of light
    • 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
    • G11B11/10506—Recording by modulating only the light beam of the transducer
    • 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
    • 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
    • G11B11/10517—Overwriting or erasing
    • 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
    • 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
DE69226041T 1991-04-17 1992-04-16 Magneto-optisches Aufzeichnungsmedium Expired - Lifetime DE69226041T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8550391 1991-04-17
JP4074605A JP2839783B2 (ja) 1991-04-17 1992-03-30 光磁気記録媒体、再生装置及び再生方法

Publications (2)

Publication Number Publication Date
DE69226041D1 true DE69226041D1 (de) 1998-08-06
DE69226041T2 DE69226041T2 (de) 1999-01-28

Family

ID=26415766

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69226041T Expired - Lifetime DE69226041T2 (de) 1991-04-17 1992-04-16 Magneto-optisches Aufzeichnungsmedium

Country Status (5)

Country Link
US (1) US5707727A (de)
EP (1) EP0509836B1 (de)
JP (1) JP2839783B2 (de)
CA (1) CA2066087C (de)
DE (1) DE69226041T2 (de)

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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
EP1143434A3 (de) * 1992-08-28 2001-12-12 Canon Kabushiki Kaisha Magnetooptisches Aufzeichnungsmedium und Informationsaufzeichungs- und Wiedergabeverfahren damit
USRE38501E1 (en) * 1992-08-28 2004-04-20 Canon Kabushiki Kaisha Magnetooptical recording medium and information recording and reproducing methods using the recording medium
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
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
US6665235B2 (en) 1992-11-06 2003-12-16 Sharp Kabushiki Kaisha Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium
EP0974961B1 (de) 1992-11-06 2003-04-02 Sharp Kabushiki Kaisha Magnetooptischer Aufzeichnungsträger und Verfahren zur Aufzeichnung und Wiedergabe und für den magnetooptischen Aufzeichnungsträger ausgebildetes optische Kopf
JP3092363B2 (ja) 1992-12-01 2000-09-25 松下電器産業株式会社 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
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JP3088619B2 (ja) * 1994-01-17 2000-09-18 富士通株式会社 光磁気記録媒体及び該媒体に記録された情報の再生方法
JPH07230637A (ja) * 1994-02-18 1995-08-29 Canon Inc 光磁気記録媒体および該媒体を用いた情報記録再生方法
CA2142767C (en) * 1994-02-21 1998-11-17 Naoki Nishimura Magneto-optical recording medium, and information reproducing method using the medium
JPH07244876A (ja) * 1994-03-01 1995-09-19 Sharp Corp 光磁気記録媒体及び光磁気記録再生方法
JP3230388B2 (ja) * 1994-03-15 2001-11-19 富士通株式会社 光磁気記録媒体及び該媒体に記録された情報の再生方法
JP3268126B2 (ja) * 1994-07-06 2002-03-25 シャープ株式会社 光記録媒体
JP3426034B2 (ja) * 1994-07-20 2003-07-14 シャープ株式会社 光磁気記録媒体および記録再生方法並びに光磁気記録媒体の製造方法
JP3354726B2 (ja) * 1994-09-27 2002-12-09 松下電器産業株式会社 光磁気記録媒体及び再生方法
DE19535994C2 (de) * 1994-10-14 1998-07-16 Sharp Kk Magnetooptisches Aufzeichnungsmedium und Herstellverfahren für dieses
JP3091099B2 (ja) * 1994-11-25 2000-09-25 シャープ株式会社 光磁気記録媒体および光磁気記録再生方法
JPH08180429A (ja) * 1994-12-22 1996-07-12 Sharp Corp 光情報記録再生装置及び光記録媒体
JP3429877B2 (ja) 1994-12-27 2003-07-28 シャープ株式会社 光磁気記録媒体およびその再生方法並びに記録方法
US5968678A (en) * 1995-08-31 1999-10-19 Sanyo Electric., Ltd. Magneto-optical recording medium and manufacturing method thereof
JP3539531B2 (ja) * 1996-04-22 2004-07-07 シャープ株式会社 光磁気記録媒体
US5945228A (en) * 1996-04-23 1999-08-31 Matsushita Electric Industrial Co., Ltd. Magneto-optical recording medium and method for reproducing thereof
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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
JP4033998B2 (ja) * 1999-01-29 2008-01-16 シャープ株式会社 熱アシスト磁気信号再生装置及び熱アシスト磁気信号再生方法
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JP2002170292A (ja) 2000-12-01 2002-06-14 Fujitsu Ltd 光磁気記録媒体及びその再生方法
JP2002245693A (ja) 2001-02-15 2002-08-30 Fujitsu Ltd 光磁気記録媒体及びその製造方法
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JP3871906B2 (ja) 2001-07-02 2007-01-24 シャープ株式会社 再生パワー制御方法および再生パワー制御装置並びにそれを備えた記録再生装置
JP2003233937A (ja) 2002-02-06 2003-08-22 Sony Corp 光学記録再生方法及び光記録媒体
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JP2812817B2 (ja) * 1991-07-08 1998-10-22 シャープ株式会社 光磁気記録媒体

Also Published As

Publication number Publication date
CA2066087A1 (en) 1992-10-18
CA2066087C (en) 1999-09-07
EP0509836A3 (en) 1993-07-14
JPH0581717A (ja) 1993-04-02
EP0509836A2 (de) 1992-10-21
US5707727A (en) 1998-01-13
JP2839783B2 (ja) 1998-12-16
EP0509836B1 (de) 1998-07-01
DE69226041T2 (de) 1999-01-28

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