JPS5766542A - Optical disk - Google Patents

Optical disk

Info

Publication number
JPS5766542A
JPS5766542A JP55141723A JP14172380A JPS5766542A JP S5766542 A JPS5766542 A JP S5766542A JP 55141723 A JP55141723 A JP 55141723A JP 14172380 A JP14172380 A JP 14172380A JP S5766542 A JPS5766542 A JP S5766542A
Authority
JP
Japan
Prior art keywords
layer
laser
recording layer
optical disk
protective layer
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
JP55141723A
Other languages
Japanese (ja)
Inventor
Hideo Ando
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55141723A priority Critical patent/JPS5766542A/en
Priority to EP81107782A priority patent/EP0049821B1/en
Priority to DE8181107782T priority patent/DE3176118D1/en
Priority to US06/309,405 priority patent/US4443806A/en
Publication of JPS5766542A publication Critical patent/JPS5766542A/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

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PURPOSE:To improve the mechanical strength of an optical disk by preventing the generation of a scratch which spoils the irradiation state of laser, by forming an inorganic protective layer on a substrate surface where there is no recording layer of the optical disk, and by irradiating the protective layer side with the laser. CONSTITUTION:On one surface of a plastic substrate 1, a recording layer 2 of Te, etc., is formed and on the opposite surface, an inorganic protective layer of SiO2, etc., is formed to >=1,000Angstrom thickness. Laser 6 is focused on the recording layer 2 from the layer 3 side to form a pit. The layer 3 has high mechanical strength and is hard to scratch and even if there is dust, etc., on the layer 3, any obstacle to laser irradiation is not made. Further, deterioration due to the permeation of O2 and H2O into the recording layer 2 is prevented and, specially, those disk single bodies are connected mutually with interposing spacers 7 by forming a hollow part 6 by facing the layers 2 to each other to obtain sandwich structure, thereby obtaining a long-life disk.
JP55141723A 1980-10-09 1980-10-09 Optical disk Pending JPS5766542A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP55141723A JPS5766542A (en) 1980-10-09 1980-10-09 Optical disk
EP81107782A EP0049821B1 (en) 1980-10-09 1981-09-30 Data recording medium
DE8181107782T DE3176118D1 (en) 1980-10-09 1981-09-30 Data recording medium
US06/309,405 US4443806A (en) 1980-10-09 1981-10-07 Data recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55141723A JPS5766542A (en) 1980-10-09 1980-10-09 Optical disk

Publications (1)

Publication Number Publication Date
JPS5766542A true JPS5766542A (en) 1982-04-22

Family

ID=15298699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55141723A Pending JPS5766542A (en) 1980-10-09 1980-10-09 Optical disk

Country Status (1)

Country Link
JP (1) JPS5766542A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137149A (en) * 1982-02-08 1983-08-15 Matsushita Electric Ind Co Ltd Optical recording and reproducing dics
JPS5945745U (en) * 1982-09-16 1984-03-27 株式会社ケンウッド disk
JPS5950047U (en) * 1982-09-24 1984-04-03 富士通株式会社 optical disc media
JPS6427047A (en) * 1987-07-22 1989-01-30 Nec Corp Optical disk

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5114263A (en) * 1974-07-26 1976-02-04 Hitachi Ltd Setsugono roeiboshiho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5114263A (en) * 1974-07-26 1976-02-04 Hitachi Ltd Setsugono roeiboshiho

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137149A (en) * 1982-02-08 1983-08-15 Matsushita Electric Ind Co Ltd Optical recording and reproducing dics
JPS5945745U (en) * 1982-09-16 1984-03-27 株式会社ケンウッド disk
JPS5950047U (en) * 1982-09-24 1984-04-03 富士通株式会社 optical disc media
JPS6427047A (en) * 1987-07-22 1989-01-30 Nec Corp Optical disk

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