JP3738523B2 - 記録可能な光ディスク - Google Patents

記録可能な光ディスク Download PDF

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Publication number
JP3738523B2
JP3738523B2 JP09095397A JP9095397A JP3738523B2 JP 3738523 B2 JP3738523 B2 JP 3738523B2 JP 09095397 A JP09095397 A JP 09095397A JP 9095397 A JP9095397 A JP 9095397A JP 3738523 B2 JP3738523 B2 JP 3738523B2
Authority
JP
Japan
Prior art keywords
recording
recording layer
layer
groove portion
thermal diffusion
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
JP09095397A
Other languages
English (en)
Japanese (ja)
Other versions
JPH10283674A5 (enExample
JPH10283674A (ja
Inventor
正寛 古田
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.)
Nikon Corp
Original Assignee
Nikon 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 Nikon Corp filed Critical Nikon Corp
Priority to JP09095397A priority Critical patent/JP3738523B2/ja
Priority to US09/055,353 priority patent/US5999512A/en
Publication of JPH10283674A publication Critical patent/JPH10283674A/ja
Publication of JPH10283674A5 publication Critical patent/JPH10283674A5/ja
Application granted granted Critical
Publication of JP3738523B2 publication Critical patent/JP3738523B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
    • 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
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • 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
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
JP09095397A 1997-04-09 1997-04-09 記録可能な光ディスク Expired - Fee Related JP3738523B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP09095397A JP3738523B2 (ja) 1997-04-09 1997-04-09 記録可能な光ディスク
US09/055,353 US5999512A (en) 1997-04-09 1998-04-06 Magnetooptical disk having a thermal diffusion layer to suppress thermal transmission between adjacent information tracks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP09095397A JP3738523B2 (ja) 1997-04-09 1997-04-09 記録可能な光ディスク

Publications (3)

Publication Number Publication Date
JPH10283674A JPH10283674A (ja) 1998-10-23
JPH10283674A5 JPH10283674A5 (enExample) 2004-11-18
JP3738523B2 true JP3738523B2 (ja) 2006-01-25

Family

ID=14012859

Family Applications (1)

Application Number Title Priority Date Filing Date
JP09095397A Expired - Fee Related JP3738523B2 (ja) 1997-04-09 1997-04-09 記録可能な光ディスク

Country Status (2)

Country Link
US (1) US5999512A (enExample)
JP (1) JP3738523B2 (enExample)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6775100B1 (en) * 1997-05-05 2004-08-10 Seagate Technology Llc Laser assisted track width definition and radial control with magnetic recording
US6254966B1 (en) * 1998-08-04 2001-07-03 Victor Company Of Japan, Ltd. Information recording mediums, supporter used in the mediums, manufacture methods of the supporter, manufacturing apparatus of the supporter and stampers for producing the mediums
US6456586B1 (en) * 1998-09-10 2002-09-24 Sharp Kabushiki Kaisha Magneto-optical recording medium and process for producing the same
US6449239B1 (en) * 1998-11-25 2002-09-10 Matsushita Electric Industrial Co., Ltd. Optical information recording medium with thermal diffusion layer
JP3866016B2 (ja) * 1999-07-02 2007-01-10 Ｔｄｋ株式会社 光情報媒体およびその再生方法
US6703099B2 (en) 2000-07-27 2004-03-09 Seagate Technology Llc Perpendicular magnetic recording media with patterned soft magnetic underlayer
US7212520B2 (en) * 2002-02-13 2007-05-01 International Business Machines For Corporation Net-aware telephone switch
KR100499479B1 (ko) * 2002-09-10 2005-07-05 엘지전자 주식회사 고밀도 광디스크 구조
US20050270959A1 (en) * 2004-06-02 2005-12-08 Hiroyuki Iwasa Recording method for optical recording medium, and optical recording apparatus
US7862914B2 (en) 2005-07-26 2011-01-04 Seagate Technology Llc Heatsink films for magnetic recording media
JP2008071465A (ja) * 2006-09-15 2008-03-27 Ricoh Co Ltd 光情報記録媒体

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0368194B1 (en) * 1988-11-07 1998-06-17 Hitachi, Ltd. Magneto-optical recording medium
US5118541A (en) * 1989-06-19 1992-06-02 Matsushita Electric Industrial Co., Ltd. Erasable optical disk media and method of recording/erasing the same
JP3038853B2 (ja) * 1990-09-13 2000-05-08 株式会社ニコン 高レベルのマージンが拡大したオーバーライト可能な光磁気記録媒体
US5821004A (en) * 1991-11-29 1998-10-13 Matsushita Electric Industrial Co., Ltd Magneto-optical recording medium and recording and reading out process using the same
US5635267A (en) * 1992-09-17 1997-06-03 Matsushita Electric Industrial Co., Ltd. Optical information recording medium of phase change type having variably grooved tracks depending on their radial locations

Also Published As

Publication number Publication date
JPH10283674A (ja) 1998-10-23
US5999512A (en) 1999-12-07

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