DE69934455D1 - Magnetooptisches Speichermedium - Google Patents

Magnetooptisches Speichermedium

Info

Publication number
DE69934455D1
DE69934455D1 DE69934455T DE69934455T DE69934455D1 DE 69934455 D1 DE69934455 D1 DE 69934455D1 DE 69934455 T DE69934455 T DE 69934455T DE 69934455 T DE69934455 T DE 69934455T DE 69934455 D1 DE69934455 D1 DE 69934455D1
Authority
DE
Germany
Prior art keywords
magneto
storage medium
optic storage
optic
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
DE69934455T
Other languages
English (en)
Other versions
DE69934455T2 (de
Inventor
Noboru Iwata
Akira Takahashi
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
Application granted granted Critical
Publication of DE69934455D1 publication Critical patent/DE69934455D1/de
Publication of DE69934455T2 publication Critical patent/DE69934455T2/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
    • G11B11/10582—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
    • G11B11/10502—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
DE69934455T 1998-06-19 1999-06-16 Magnetooptisches Speichermedium Expired - Lifetime DE69934455T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP17348998A JP3492525B2 (ja) 1998-06-19 1998-06-19 光磁気記録媒体
JP17348998 1998-06-19

Publications (2)

Publication Number Publication Date
DE69934455D1 true DE69934455D1 (de) 2007-02-01
DE69934455T2 DE69934455T2 (de) 2007-09-27

Family

ID=15961464

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69934455T Expired - Lifetime DE69934455T2 (de) 1998-06-19 1999-06-16 Magnetooptisches Speichermedium

Country Status (4)

Country Link
US (1) US6117544A (de)
EP (1) EP0965987B1 (de)
JP (1) JP3492525B2 (de)
DE (1) DE69934455T2 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6492035B1 (en) * 1998-08-31 2002-12-10 Sanyo Electric Co., Ltd. Magneto-optical recording medium with intermediate layer having a controlled saturation magnetization
JP3519293B2 (ja) * 1998-11-20 2004-04-12 シャープ株式会社 光磁気記録媒体、光磁気記録媒体の再生方法、光磁気記録再生装置
US6430116B1 (en) 1999-05-11 2002-08-06 Mitsubishi Chemical Corporation Magneto-optical storage medium having first and second recording layers
JP3626050B2 (ja) 1999-11-02 2005-03-02 シャープ株式会社 光磁気記録媒体及びその記録方法
JP2001222843A (ja) 2000-02-07 2001-08-17 Sony Corp 光磁気記録媒体
EP1286346A4 (de) * 2000-04-19 2007-04-18 Sanyo Electric Co Magnetooptische platteneinrichtung mit der fähigkeit, durch ein gleichstrom-magnetfeld eine magnetbereichserweiterungswiedergabe durchzuführen, und wiedergabeverfahren
US6430114B1 (en) * 2000-05-12 2002-08-06 Toda Citron Technologies, Inc. Self-lubricating layer for a data storage disk
US6677105B2 (en) 2000-05-12 2004-01-13 Toda Kogyo Corporation Self-lubricating layer for data storage devices
US6770387B2 (en) * 2000-10-26 2004-08-03 Fujitsu Limited Magneto-optical recording medium and method of reproducing the same
US6767656B2 (en) 2000-10-26 2004-07-27 Fujitsu Limited Magneto-optical recording medium and method of reproducing the same
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
JP2002329352A (ja) * 2001-04-27 2002-11-15 Sharp Corp 光磁気記録媒体
JP2002352484A (ja) * 2001-05-25 2002-12-06 Fujitsu Ltd 光磁気記録媒体
JPWO2003071532A1 (ja) * 2002-02-25 2005-06-16 富士通株式会社 光磁気記録媒体及びその記録再生装置
JP2005222669A (ja) * 2004-01-05 2005-08-18 Fujitsu Ltd 磁気記録媒体および磁気記憶装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69331924T2 (de) * 1992-08-28 2002-10-10 Canon Kk Magnetooptisches Aufzeichnungsmedium und Informationsaufzeichungs- und Wiedergabeverfahren damit
JP3297513B2 (ja) * 1993-03-04 2002-07-02 キヤノン株式会社 光磁気記録媒体及び該媒体を用いた情報再生方法
JPH08106660A (ja) * 1994-10-05 1996-04-23 Canon Inc 光磁気記録媒体及び該媒体を用いた情報再生方法
JP3585671B2 (ja) * 1995-11-14 2004-11-04 シャープ株式会社 光磁気記録媒体及びその再生方法
JPH09180276A (ja) * 1995-12-25 1997-07-11 Sharp Corp 光磁気記録媒体およびその再生方法
JP3781823B2 (ja) * 1996-05-27 2006-05-31 シャープ株式会社 光磁気記録媒体及びその再生方法
JP3545133B2 (ja) * 1996-07-23 2004-07-21 シャープ株式会社 光磁気記録媒体の再生方法及び光磁気記録媒体

Also Published As

Publication number Publication date
EP0965987B1 (de) 2006-12-20
EP0965987A2 (de) 1999-12-22
DE69934455T2 (de) 2007-09-27
US6117544A (en) 2000-09-12
JP2000011475A (ja) 2000-01-14
EP0965987A3 (de) 2002-06-05
JP3492525B2 (ja) 2004-02-03

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition