DE69021657T2 - Opto-magnetisches Aufzeichnungsmedium. - Google Patents

Opto-magnetisches Aufzeichnungsmedium.

Info

Publication number
DE69021657T2
DE69021657T2 DE69021657T DE69021657T DE69021657T2 DE 69021657 T2 DE69021657 T2 DE 69021657T2 DE 69021657 T DE69021657 T DE 69021657T DE 69021657 T DE69021657 T DE 69021657T DE 69021657 T2 DE69021657 T2 DE 69021657T2
Authority
DE
Germany
Prior art keywords
opto
recording medium
magnetic recording
magnetic
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
DE69021657T
Other languages
English (en)
Other versions
DE69021657D1 (de
Inventor
Tomokazu Ise
Takeo Takase
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 DE69021657D1 publication Critical patent/DE69021657D1/de
Application granted granted Critical
Publication of DE69021657T2 publication Critical patent/DE69021657T2/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
    • G11B11/10582—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
    • 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
DE69021657T 1989-06-30 1990-06-29 Opto-magnetisches Aufzeichnungsmedium. Expired - Fee Related DE69021657T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17064889 1989-06-30

Publications (2)

Publication Number Publication Date
DE69021657D1 DE69021657D1 (de) 1995-09-21
DE69021657T2 true DE69021657T2 (de) 1996-02-01

Family

ID=15908773

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69021657T Expired - Fee Related DE69021657T2 (de) 1989-06-30 1990-06-29 Opto-magnetisches Aufzeichnungsmedium.

Country Status (4)

Country Link
US (1) US5094925A (de)
EP (1) EP0406023B1 (de)
JP (1) JP2703395B2 (de)
DE (1) DE69021657T2 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2910250B2 (ja) * 1990-12-27 1999-06-23 ソニー株式会社 光磁気記録媒体
JP2672895B2 (ja) * 1991-01-16 1997-11-05 三菱電機株式会社 光磁気記録媒体
US5202880A (en) * 1992-03-06 1993-04-13 Digital Equipment Corporation Double-sided magneto-optical media for a multi-disk storage device
US5434844A (en) * 1992-04-10 1995-07-18 Hitachi, Ltd. Magneto-optical recording media and magneto-optical recording device using the same
JPH06208736A (ja) * 1992-10-30 1994-07-26 Canon Inc 光磁気記録媒体
JPH06309710A (ja) * 1993-04-27 1994-11-04 Nikon Corp 光磁気記録媒体
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
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
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
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
DE19535994C2 (de) * 1994-10-14 1998-07-16 Sharp Kk Magnetooptisches Aufzeichnungsmedium und Herstellverfahren für dieses
US6423430B1 (en) * 1995-07-17 2002-07-23 Samsung Electronics Co., Ltd. Magneto-optical recording medium for short wavelength
BR0008208A (pt) 1999-02-12 2002-02-19 Gen Electric Meios de armazenamento de dados
US6590836B1 (en) * 1999-09-29 2003-07-08 Sanyo Electric Co., Ltd. Magneto optical recording medium capable of preventing a reproduction layer from having a degraded characteristic
JP2004536693A (ja) * 2001-04-19 2004-12-09 ゼネラル・エレクトリック・カンパニイ スピンコート媒体
DE602004027227D1 (de) * 2003-03-31 2010-07-01 Panasonic Corp Speicherzelle, speicher mit der speicherzelle, speicherzellenherstellungsverfahren und speicheraufzeichnungs-/leseverfahren
US7736765B2 (en) * 2004-12-28 2010-06-15 Seagate Technology Llc Granular perpendicular magnetic recording media with dual recording layer and method of fabricating same
US8110298B1 (en) 2005-03-04 2012-02-07 Seagate Technology Llc Media for high density perpendicular magnetic recording
US8119263B2 (en) * 2005-09-22 2012-02-21 Seagate Technology Llc Tuning exchange coupling in magnetic recording media
JP4820156B2 (ja) * 2005-11-29 2011-11-24 住友大阪セメント株式会社 セメント硬化体の破砕方法および静的破砕剤注入用容器
US8697260B2 (en) * 2008-07-25 2014-04-15 Seagate Technology Llc Method and manufacture process for exchange decoupled first magnetic layer
US7867637B2 (en) 2008-11-17 2011-01-11 Seagate Technology Llc Low coupling oxide media (LCOM)
US9142240B2 (en) 2010-07-30 2015-09-22 Seagate Technology Llc Apparatus including a perpendicular magnetic recording layer having a convex magnetic anisotropy profile

Family Cites Families (17)

* 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
JPS5961011A (ja) * 1982-09-30 1984-04-07 Ricoh Co Ltd 光磁気記録媒体
US4556291A (en) * 1983-08-08 1985-12-03 Xerox Corporation Magneto-optic storage media
JPS6066349A (ja) * 1983-09-22 1985-04-16 Agency Of Ind Science & Technol 光熱磁気記録媒体およびその製造方法
JPS60107751A (ja) * 1983-11-17 1985-06-13 Canon Inc 光熱磁気記録媒体
JPS60173746A (ja) * 1984-02-17 1985-09-07 Kyocera Corp 光磁気記録媒体
CA1254385A (en) * 1985-07-26 1989-05-23 Noboru Sato Magneto-optical recording medium having amorphous artificially layered structure of rare earth element and transition metal element
JPH07105082B2 (ja) * 1985-11-28 1995-11-13 ソニー株式会社 光磁気記録媒体
DE3752222T2 (de) * 1986-07-08 1999-03-25 Canon Kk Magnetoptisches Aufzeichnungsmedium mit der Möglichkeit des Überschreibens mit zwei oder mehr Magnetschichten und dieses Medium verwendende Aufzeichnungsmethode
JP2570270B2 (ja) * 1986-10-08 1997-01-08 株式会社ニコン ツービームによる光磁気記録方法及び装置
JP2754537B2 (ja) * 1987-05-18 1998-05-20 株式会社ニコン 光磁気記録媒体並びにそれを使用したビット形成方法
DE3876175T2 (de) * 1987-08-25 1993-06-17 Canon Kk Optomagnetischer aufzeichnungstraeger mit einer mehrzahl von austauschgekoppelten magnetischen schichten.
EP0330394B1 (de) * 1988-02-22 1996-07-17 Canon Kabushiki Kaisha Zweischichtiger magneto-optischer Aufzeichnungsträger mit einer Schicht niedriger Koerzitivkraft, bestehend aus Gd und mindestens Tb oder Dy
JP2642656B2 (ja) * 1988-03-10 1997-08-20 キヤノン株式会社 光磁気記録媒体
JP2556563B2 (ja) * 1988-10-11 1996-11-20 キヤノン株式会社 光磁気記録媒体
JP2556564B2 (ja) * 1988-10-11 1996-11-20 キヤノン株式会社 光磁気記録媒体
GB2234623B (en) * 1988-11-04 1993-04-14 Ricoh Kk Magneto-optical recording method and magneto-optical recording medium for use in the same

Also Published As

Publication number Publication date
JPH0386952A (ja) 1991-04-11
EP0406023A3 (en) 1992-03-04
DE69021657D1 (de) 1995-09-21
EP0406023B1 (de) 1995-08-16
EP0406023A2 (de) 1991-01-02
US5094925A (en) 1992-03-10
JP2703395B2 (ja) 1998-01-26

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Legal Events

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