JPS57167149A - Optical recording medium - Google Patents

Optical recording medium

Info

Publication number
JPS57167149A
JPS57167149A JP56051160A JP5116081A JPS57167149A JP S57167149 A JPS57167149 A JP S57167149A JP 56051160 A JP56051160 A JP 56051160A JP 5116081 A JP5116081 A JP 5116081A JP S57167149 A JPS57167149 A JP S57167149A
Authority
JP
Japan
Prior art keywords
recording layer
base material
recording
recording medium
optical recording
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.)
Pending
Application number
JP56051160A
Other languages
Japanese (ja)
Inventor
Akihiko Kuroiwa
Noriyoshi Nanba
Shiro Nakagawa
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Priority to JP56051160A priority Critical patent/JPS57167149A/en
Publication of JPS57167149A publication Critical patent/JPS57167149A/en
Priority to US06/708,385 priority patent/US4599718A/en
Pending legal-status Critical Current

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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G11B7/245—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing a polymeric component
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0055—Erasing
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G11B7/2531—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising glass
    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PURPOSE:To obtain a nonpoisonous and inexpensive optical recording medium where recorded data can be erased and rewritten and recording is stable, by deforming physically a recording layer consisting of a hot melt substance by selective heating and prevent a base material from being exposed in the deformed part. CONSTITUTION:A physical deformation which is discriminated optically is applied to a recording layer 22 provided on a base material 29 to record information. The recording layer 22 of this optical recording medium consists of a hot melt substance, and said physical deformation is given by heating selectively the recording layer 22, and the base material 20 is prevented from being exposed to outside air in a physically deformed part 26. For example, the base material 20 consists of glass or acrylic resin, and the recording layer 22 consists of styrene lower polymer compound, and a thickness (t) of the recording layer 22 is made larger than a diameter (d) of a recording pit 26. Information is recorded by forming the pit 26 having a diameter of about 1-2mum with irradiation of a laser beam.
JP56051160A 1981-04-07 1981-04-07 Optical recording medium Pending JPS57167149A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56051160A JPS57167149A (en) 1981-04-07 1981-04-07 Optical recording medium
US06/708,385 US4599718A (en) 1981-04-07 1985-03-08 Method for erasing a light recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56051160A JPS57167149A (en) 1981-04-07 1981-04-07 Optical recording medium

Publications (1)

Publication Number Publication Date
JPS57167149A true JPS57167149A (en) 1982-10-14

Family

ID=12879068

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56051160A Pending JPS57167149A (en) 1981-04-07 1981-04-07 Optical recording medium

Country Status (1)

Country Link
JP (1) JPS57167149A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0097510A2 (en) * 1982-06-21 1984-01-04 Celanese Corporation Erasable optical recording medium
JPS5982342U (en) * 1982-11-22 1984-06-04 沖電気工業株式会社 optical recording medium
JPS5989431U (en) * 1982-12-08 1984-06-16 沖電気工業株式会社 optical recording medium
US5312714A (en) * 1991-08-02 1994-05-17 Canon Kabushiki Kaisha Optical recording medium, process for producing recording medium, and information recording method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0097510A2 (en) * 1982-06-21 1984-01-04 Celanese Corporation Erasable optical recording medium
JPS5982342U (en) * 1982-11-22 1984-06-04 沖電気工業株式会社 optical recording medium
JPH0319063Y2 (en) * 1982-11-22 1991-04-23
JPS5989431U (en) * 1982-12-08 1984-06-16 沖電気工業株式会社 optical recording medium
JPH0319064Y2 (en) * 1982-12-08 1991-04-23
US5312714A (en) * 1991-08-02 1994-05-17 Canon Kabushiki Kaisha Optical recording medium, process for producing recording medium, and information recording method

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