DE3587538D1 - Magneto-optisches speicherelement. - Google Patents

Magneto-optisches speicherelement.

Info

Publication number
DE3587538D1
DE3587538D1 DE8888201371T DE3587538T DE3587538D1 DE 3587538 D1 DE3587538 D1 DE 3587538D1 DE 8888201371 T DE8888201371 T DE 8888201371T DE 3587538 T DE3587538 T DE 3587538T DE 3587538 D1 DE3587538 D1 DE 3587538D1
Authority
DE
Germany
Prior art keywords
magneto
storage element
optical storage
optical
storage
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
DE8888201371T
Other languages
English (en)
Other versions
DE3587538T2 (de
Inventor
Kenji Ohta
Akira Takahashi
Hiroyuki Katayama
Junji Hirogane
Yoshiteru Murakami
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
Priority claimed from JP59075541A external-priority patent/JPS60219654A/ja
Priority claimed from JP10420784A external-priority patent/JPS60247844A/ja
Application filed by Sharp Corp filed Critical Sharp Corp
Application granted granted Critical
Publication of DE3587538D1 publication Critical patent/DE3587538D1/de
Publication of DE3587538T2 publication Critical patent/DE3587538T2/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
    • 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
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/146—Laser beam
    • 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
    • Y10T428/22—Nonparticulate element embedded or inlaid in substrate and visible
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
DE19853587538 1984-04-13 1985-04-12 Magneto-optisches Speicherelement. Expired - Lifetime DE3587538T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59075541A JPS60219654A (ja) 1984-04-13 1984-04-13 光メモリ素子
JP10420784A JPS60247844A (ja) 1984-05-22 1984-05-22 磁気光学記憶素子の製造方法

Publications (2)

Publication Number Publication Date
DE3587538D1 true DE3587538D1 (de) 1993-09-23
DE3587538T2 DE3587538T2 (de) 1993-12-09

Family

ID=26416672

Family Applications (2)

Application Number Title Priority Date Filing Date
DE8585302580T Expired - Lifetime DE3581230D1 (de) 1984-04-13 1985-04-12 Magneto-optisches speicherelement.
DE19853587538 Expired - Lifetime DE3587538T2 (de) 1984-04-13 1985-04-12 Magneto-optisches Speicherelement.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE8585302580T Expired - Lifetime DE3581230D1 (de) 1984-04-13 1985-04-12 Magneto-optisches speicherelement.

Country Status (4)

Country Link
US (1) US4719137A (de)
EP (2) EP0297689B1 (de)
CA (1) CA1234916A (de)
DE (2) DE3581230D1 (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719137A (en) 1984-04-13 1988-01-12 Sharp Kabushiki Kaisha Magneto-optic memory element
JPH0697514B2 (ja) * 1985-02-21 1994-11-30 シャープ株式会社 磁気光学記憶素子
US4782477A (en) * 1985-09-30 1988-11-01 Kabushiki Kaisha Toshiba Optical recording medium with fluorine resin adhesive
JPH0719396B2 (ja) * 1985-12-09 1995-03-06 ソニー株式会社 情報記録媒体
EP0239390A3 (de) * 1986-03-27 1989-04-26 Canon Kabushiki Kaisha Optisch-magnetisches Aufzeichnungsmedium
US4800112A (en) * 1986-04-10 1989-01-24 Seiko Epson Corporation Optical recording medium
JP2526864B2 (ja) * 1986-04-16 1996-08-21 ソニー株式会社 光学記録媒体
JPS63102050A (ja) * 1986-10-17 1988-05-06 Fuji Photo Film Co Ltd 光磁気記録媒体およびその製造方法
DE3702480A1 (de) * 1987-01-28 1988-08-11 Philips Patentverwaltung Verfahren zur herstellung eines magneto-optischen speichers
JPS6437743A (en) * 1987-08-03 1989-02-08 Hitachi Ltd Magneto-optical recording medium
US5283133A (en) * 1988-07-27 1994-02-01 Mitsubishi Denki Kabushiki Kaisha Magneto-optical disk
JPH0250335A (ja) * 1988-08-12 1990-02-20 Sharp Corp 磁気光学記憶素子
CN1018304B (zh) * 1988-10-17 1992-09-16 三井石油化学工业株式会社 磁光记录介质
KR900008471A (ko) * 1988-11-07 1990-06-04 미다 가쓰시게 광자기 디스크
JP2660569B2 (ja) * 1989-02-10 1997-10-08 三菱電機株式会社 光磁気記録媒体
US5667862A (en) * 1989-03-15 1997-09-16 Sony Corporation Magneto-optical disk
US5914198A (en) * 1989-06-05 1999-06-22 Hitachi, Ltd. Magneto-optical recording medium having dielectric layers with different indices of refraction
US5698312A (en) * 1990-03-22 1997-12-16 Fuji Photo Film Co., Ltd. Magneto-optical recording medium and method for making the same
US5573847A (en) * 1990-09-14 1996-11-12 Komag, Inc. Magneto-optic disk exhibiting a phase shift between plus and minus twelve degrees and a reflectivity between fifteen and twenty-five percent
JP2968632B2 (ja) * 1991-03-14 1999-10-25 ティーディーケイ株式会社 光磁気記録媒体
EP0503607B1 (de) * 1991-03-14 1999-07-21 TDK Corporation Magneto-optisches Aufzeichnungsmedium
US6842409B2 (en) * 2001-02-21 2005-01-11 Scratch-Less Disc Industries, Llc Optical disc and method of protecting same
US6680898B2 (en) * 2001-02-21 2004-01-20 Todd J. Kuchman Optical disc and method of protecting same

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2288370A1 (fr) * 1974-10-18 1976-05-14 Thomson Brandt Perfectionnements aux supports d'information a lecture optique
US4360820A (en) * 1979-10-01 1982-11-23 Omex Laser recording medium
US4435801A (en) * 1979-12-28 1984-03-06 Rca Corporation Information record with a thick overcoat
FR2474223A1 (fr) * 1980-01-23 1981-07-24 Thomson Csf Procede d'inscription thermo-optique d'information et support d'information destine a la mise en oeuvre de ce procede
US4467383A (en) * 1980-02-23 1984-08-21 Sharp Kabushiki Kaisha Magnetooptic memory medium
US4414650A (en) * 1980-06-23 1983-11-08 Sharp Kabushiki Kaisha Magneto-optic memory element
JPS5727495A (en) * 1980-07-23 1982-02-13 Sharp Corp Magneto-optical storage element
JPS5793770A (en) * 1980-12-02 1982-06-10 Fujitsu Ltd Digital audible signal tone generation system
CA1185013A (en) * 1981-01-14 1985-04-02 Kenji Ohta Magneto-optic memory medium
JPS57169938A (en) * 1981-04-10 1982-10-19 Sony Corp Optical type recording medium
US4546464A (en) * 1982-02-05 1985-10-08 Matsushita Electric Industrial Co., Ltd. Method of manufacturing an optical recording/reproducing disc
DE3382791T2 (de) * 1982-12-15 1995-12-07 Sharp Kk Magneto-optischer Speicher.
US4544443A (en) * 1983-05-13 1985-10-01 Shap Kabushiki Kaisha Method for manufacturing an optical memory element
JPH0636253B2 (ja) * 1983-08-18 1994-05-11 シャープ株式会社 光メモリ円板
CA1224270A (en) 1983-09-16 1987-07-14 Junji Hirokane Magneto-optic memory element
US4543307A (en) * 1984-02-17 1985-09-24 Drexler Technology Corporation Optical data storage and recording media having recording surface protection
US4719137A (en) 1984-04-13 1988-01-12 Sharp Kabushiki Kaisha Magneto-optic memory element
US8488446B1 (en) 2010-10-27 2013-07-16 Amazon Technologies, Inc. Managing failure behavior for computing nodes of provided computer networks

Also Published As

Publication number Publication date
EP0161807A1 (de) 1985-11-21
EP0161807B1 (de) 1991-01-09
EP0297689A2 (de) 1989-01-04
DE3587538T2 (de) 1993-12-09
CA1234916A (en) 1988-04-05
EP0297689B1 (de) 1993-08-18
EP0297689A3 (en) 1989-06-14
DE3581230D1 (de) 1991-02-14
US4719137A (en) 1988-01-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition