WO1999026236A3 - Method for thermal crosstalk control on optical media - Google Patents

Method for thermal crosstalk control on optical media Download PDF

Info

Publication number
WO1999026236A3
WO1999026236A3 PCT/US1998/024573 US9824573W WO9926236A3 WO 1999026236 A3 WO1999026236 A3 WO 1999026236A3 US 9824573 W US9824573 W US 9824573W WO 9926236 A3 WO9926236 A3 WO 9926236A3
Authority
WO
WIPO (PCT)
Prior art keywords
layer
optical media
reflective layer
thermal crosstalk
crosstalk control
Prior art date
Application number
PCT/US1998/024573
Other languages
French (fr)
Other versions
WO1999026236A2 (en
WO1999026236A9 (en
Inventor
Michael Berry Hintz
Original Assignee
Seagate Technology
Michael Berry Hintz
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 Seagate Technology, Michael Berry Hintz filed Critical Seagate Technology
Publication of WO1999026236A2 publication Critical patent/WO1999026236A2/en
Publication of WO1999026236A3 publication Critical patent/WO1999026236A3/en
Publication of WO1999026236A9 publication Critical patent/WO1999026236A9/en

Links

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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • G11B7/266—Sputtering or spin-coating layers
    • 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
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24073—Tracks
    • G11B7/24076—Cross sectional shape in the radial direction of a disc, e.g. asymmetrical cross sectional shape

Abstract

A method for reducing lateral heat transfer which relies upon the combination of the geometry molded into the preformat and the angular sensitivity of ion milling. The reflector layer (16, 38) is etched so that the reflective layer is preferentially removed on the sidewalls of the magnetooptic recording medium as shown in figure 7B. Other layers, including the recording layer can be deposited after the ion milling or alternatively the etching may take place when the reflective layer is the outermost layer. The reflective layer may be Al, Au, Ag or the like.
PCT/US1998/024573 1997-11-17 1998-11-17 Method for thermal crosstalk control on optical media WO1999026236A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6577597P 1997-11-17 1997-11-17
US60/065,775 1997-11-17

Publications (3)

Publication Number Publication Date
WO1999026236A2 WO1999026236A2 (en) 1999-05-27
WO1999026236A3 true WO1999026236A3 (en) 1999-09-02
WO1999026236A9 WO1999026236A9 (en) 1999-10-07

Family

ID=22065020

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/024573 WO1999026236A2 (en) 1997-11-17 1998-11-17 Method for thermal crosstalk control on optical media

Country Status (1)

Country Link
WO (1) WO1999026236A2 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893299A (en) * 1983-04-28 1990-01-09 Humberstone Victor C Magneto-optic data storage technique
JPH02108254A (en) * 1988-10-17 1990-04-20 Hitachi Ltd Magneto-optical recording medium and production thereof
JPH0413253A (en) * 1990-05-02 1992-01-17 Sharp Corp Magneto-optical memory element and production thereof
US5115424A (en) * 1988-01-22 1992-05-19 Mitsubishi Denki Kabushiki Kaisha Optical storage medium with provision for limitation of thermal conduction
JPH05242541A (en) * 1992-02-26 1993-09-21 Casio Comput Co Ltd Magneto-optical disk
US5645909A (en) * 1994-10-19 1997-07-08 Fuji Xerox Co., Ltd. Optical recording medium and method for forming same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893299A (en) * 1983-04-28 1990-01-09 Humberstone Victor C Magneto-optic data storage technique
US5115424A (en) * 1988-01-22 1992-05-19 Mitsubishi Denki Kabushiki Kaisha Optical storage medium with provision for limitation of thermal conduction
JPH02108254A (en) * 1988-10-17 1990-04-20 Hitachi Ltd Magneto-optical recording medium and production thereof
JPH0413253A (en) * 1990-05-02 1992-01-17 Sharp Corp Magneto-optical memory element and production thereof
JPH05242541A (en) * 1992-02-26 1993-09-21 Casio Comput Co Ltd Magneto-optical disk
US5645909A (en) * 1994-10-19 1997-07-08 Fuji Xerox Co., Ltd. Optical recording medium and method for forming same

Also Published As

Publication number Publication date
WO1999026236A2 (en) 1999-05-27
WO1999026236A9 (en) 1999-10-07

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