DE69122977D1 - Magnetooptisches Aufzeichnungsmedium - Google Patents

Magnetooptisches Aufzeichnungsmedium

Info

Publication number
DE69122977D1
DE69122977D1 DE69122977T DE69122977T DE69122977D1 DE 69122977 D1 DE69122977 D1 DE 69122977D1 DE 69122977 T DE69122977 T DE 69122977T DE 69122977 T DE69122977 T DE 69122977T DE 69122977 D1 DE69122977 D1 DE 69122977D1
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
DE69122977T
Other languages
English (en)
Other versions
DE69122977T2 (de
Inventor
Kenji Ohta
Junichiro Nakayama
Hiroyuki Katayama
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 DE69122977D1 publication Critical patent/DE69122977D1/de
Publication of DE69122977T2 publication Critical patent/DE69122977T2/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
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
    • 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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/1058—Flying heads
    • 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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0914—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by non-optical methods, e.g. capacitive
    • 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
DE69122977T 1990-02-23 1991-02-22 Magnetooptisches Aufzeichnungsmedium Expired - Lifetime DE69122977T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2043944A JPH03248351A (ja) 1990-02-23 1990-02-23 光磁気記録媒体及びそれを用いる磁気記録再生装置

Publications (2)

Publication Number Publication Date
DE69122977D1 true DE69122977D1 (de) 1996-12-12
DE69122977T2 DE69122977T2 (de) 1997-03-27

Family

ID=12677813

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69122977T Expired - Lifetime DE69122977T2 (de) 1990-02-23 1991-02-22 Magnetooptisches Aufzeichnungsmedium

Country Status (6)

Country Link
US (1) US5453884A (de)
EP (1) EP0443878B1 (de)
JP (1) JPH03248351A (de)
KR (1) KR940010950B1 (de)
CA (1) CA2036138C (de)
DE (1) DE69122977T2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5470627A (en) * 1992-03-06 1995-11-28 Quantum Corporation Double-sided optical media for a disk storage device
US5202880A (en) * 1992-03-06 1993-04-13 Digital Equipment Corporation Double-sided magneto-optical media for a multi-disk storage device
JP2000100008A (ja) * 1998-09-24 2000-04-07 Fujitsu Ltd 光磁気記録媒体及び光学ヘッド装置
US6292459B1 (en) * 1999-05-14 2001-09-18 Terastor Corporation Reduction of electrostatic charge build-up in storage medium
US6677105B2 (en) 2000-05-12 2004-01-13 Toda Kogyo Corporation Self-lubricating layer for data storage devices
US6430114B1 (en) 2000-05-12 2002-08-06 Toda Citron Technologies, Inc. Self-lubricating layer for a data storage disk
JP2002157783A (ja) * 2000-11-15 2002-05-31 Sharp Corp 光情報記録媒体
JP3859444B2 (ja) * 2000-11-15 2006-12-20 シャープ株式会社 光情報記録媒体
US7310198B2 (en) * 2005-06-15 2007-12-18 Hitachi Global Storage Technologies Netherlands, B.V. Measurement of slider body clearance in a magnetic disk drive using positive and negative electrical pulses
US7286314B2 (en) * 2005-06-15 2007-10-23 Hitachi Global Storage Technologies Netherlands, B.V. Disk drive with localized clearance and contact potential measurement capability
US7310197B2 (en) * 2005-06-15 2007-12-18 Hitachi Global Storage Technologies Netherlands, B.V. Simultaneous measurement of contact potential and slider body clearance in a magnetic disk drive

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4188434A (en) * 1978-05-15 1980-02-12 Storage Technology Corporation Lubricant for a magnetic member
US4689254A (en) * 1984-02-01 1987-08-25 Verbatim Corporation Magnetic recording element having a lubricative and protective coating
JPS61280054A (ja) * 1985-06-04 1986-12-10 Mitsubishi Plastics Ind Ltd 光磁気記録媒体
JPH0760511B2 (ja) * 1985-06-26 1995-06-28 株式会社東芝 高耐久性磁気記録媒体
JP2633230B2 (ja) * 1985-09-26 1997-07-23 日本電気株式会社 磁気記憶体
JPS62192041A (ja) * 1986-02-19 1987-08-22 Hitachi Ltd 光記録円板
JPS62219348A (ja) * 1986-03-20 1987-09-26 Fuji Photo Film Co Ltd 光磁気記録媒体
JPS6310357A (ja) * 1986-07-02 1988-01-16 Konica Corp 光磁気記録媒体
JPS63237239A (ja) * 1987-03-25 1988-10-03 Fujitsu Ltd 光磁気デイスク
JPS63258993A (ja) * 1987-04-16 1988-10-26 Hitachi Metals Ltd 薄膜潤滑用合成潤滑剤及び磁気記録媒体
JPH0690787B2 (ja) * 1987-06-16 1994-11-14 株式会社日立製作所 磁気記録媒体
JP2556709B2 (ja) * 1987-08-10 1996-11-20 アルプス電気株式会社 光磁気記録装置
US4931887A (en) * 1988-02-01 1990-06-05 International Business Machines Corporation Capacitive measurement and control of the fly height of a recording slider
US4863809A (en) * 1988-03-10 1989-09-05 Magnetic Peripherals, Inc. Surface treatment for sliders and carbon coated magnetic media
JPH02203418A (ja) * 1989-01-31 1990-08-13 Kyocera Corp 光磁気記録用磁気ヘッド
FR2646002B1 (fr) * 1989-04-13 1991-06-07 Bull Sa Procede pour deposer a la surface d'un disque magnetique une couche permettant le vol de tetes d'ecriture/lecture en regard de ce dernier et disque magnetique en resultant

Also Published As

Publication number Publication date
KR940010950B1 (ko) 1994-11-19
CA2036138A1 (en) 1991-08-24
EP0443878B1 (de) 1996-11-06
EP0443878A3 (en) 1993-02-24
US5453884A (en) 1995-09-26
DE69122977T2 (de) 1997-03-27
KR920000053A (ko) 1992-01-10
CA2036138C (en) 1995-11-14
JPH03248351A (ja) 1991-11-06
EP0443878A2 (de) 1991-08-28

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Free format text: PATENTANWAELTE MUELLER & HOFFMANN, 81667 MUENCHEN

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