JPS57203237A - Optical recording medium and writing and erasing method - Google Patents

Optical recording medium and writing and erasing method

Info

Publication number
JPS57203237A
JPS57203237A JP56087078A JP8707881A JPS57203237A JP S57203237 A JPS57203237 A JP S57203237A JP 56087078 A JP56087078 A JP 56087078A JP 8707881 A JP8707881 A JP 8707881A JP S57203237 A JPS57203237 A JP S57203237A
Authority
JP
Japan
Prior art keywords
optical recording
polystyrene
recording medium
coloring matter
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.)
Pending
Application number
JP56087078A
Other languages
Japanese (ja)
Inventor
Akihiko Kuroiwa
Shiro Nakagawa
Noriyoshi Nanba
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 JP56087078A priority Critical patent/JPS57203237A/en
Publication of JPS57203237A publication Critical patent/JPS57203237A/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

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

PURPOSE:To obtain an optical recording medium possible for repeated use with a heat mode, by providing an optical recording layer including light absorbing coloring matter or pigment on a polystyrene base having an average molecular weight within a specific range. CONSTITUTION:An optical recording medium is formed by coating and drying a coating liquid with 0.002-10wt% of a light absorbing coloring matter or pigment (to 1pt.wt polystyrene) to the polystyrene with 350-10,000 average molecular weight on a substrate such as glass and plastic. Pits, 1mu diameter, projected at the circumference, 0.2mu width and recessed at the center are formed at the recording layer by irradiating a He-Ne laser beam on the medium. The bottom of the pits does not reach the bottom of the layer, then the polystyrene and the coloring matter remain, the circumference is smoothed and reading can be made through transmitted or reflected rays through the irradiation of a weak laser beam. Since the uneven pints are molten again through reheating of the medium, erasing is made easy and the use of rewriting can repetitively be made possible.
JP56087078A 1981-06-06 1981-06-06 Optical recording medium and writing and erasing method Pending JPS57203237A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56087078A JPS57203237A (en) 1981-06-06 1981-06-06 Optical recording medium and writing and erasing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56087078A JPS57203237A (en) 1981-06-06 1981-06-06 Optical recording medium and writing and erasing method

Publications (1)

Publication Number Publication Date
JPS57203237A true JPS57203237A (en) 1982-12-13

Family

ID=13904904

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56087078A Pending JPS57203237A (en) 1981-06-06 1981-06-06 Optical recording medium and writing and erasing method

Country Status (1)

Country Link
JP (1) JPS57203237A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59169896A (en) * 1983-03-09 1984-09-25 イ−ストマン・コダツク・カンパニ− Binder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59169896A (en) * 1983-03-09 1984-09-25 イ−ストマン・コダツク・カンパニ− Binder

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