JPS5766539A - Optical disk - Google Patents

Optical disk

Info

Publication number
JPS5766539A
JPS5766539A JP55141718A JP14171880A JPS5766539A JP S5766539 A JPS5766539 A JP S5766539A JP 55141718 A JP55141718 A JP 55141718A JP 14171880 A JP14171880 A JP 14171880A JP S5766539 A JPS5766539 A JP S5766539A
Authority
JP
Japan
Prior art keywords
protective layer
optical disk
thickness
stable
long period
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
JP55141718A
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 JP55141718A priority Critical patent/JPS5766539A/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 JPS5766539A publication Critical patent/JPS5766539A/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 obtain an optical disk which is stable for a long period, by forming a protective layer on the hollow part surface of an air sandwich type optical disk. CONSTITUTION:On surface 1 and 1 of substrates made of 1.5mm. thickness glass or transparent plastic, recording layer 2 and 2 of, for example, Te having 500Angstrom thickness are formed. On the recording layers 2 and 2 facing to a hollow part 3, a protective layer 5a of polystyrene, etc., and an inorganic protective layer 5b of SiO2, etc., are formed. The organic protective layer 5a has 15-40mum thickness, and inorganic protective layer 5b has >=1,000Angstrom thickness. Thus, an optical disk stable for a long period is obtained.
JP55141718A 1980-10-09 1980-10-09 Optical disk Pending JPS5766539A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP55141718A JPS5766539A (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
JP55141718A JPS5766539A (en) 1980-10-09 1980-10-09 Optical disk

Publications (1)

Publication Number Publication Date
JPS5766539A true JPS5766539A (en) 1982-04-22

Family

ID=15298577

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55141718A Pending JPS5766539A (en) 1980-10-09 1980-10-09 Optical disk

Country Status (1)

Country Link
JP (1) JPS5766539A (en)

Citations (3)

* 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
JPS52156605A (en) * 1976-06-18 1977-12-27 Thomson Brandt Data carrier and method of producing same
JPS5441703A (en) * 1977-09-09 1979-04-03 Hitachi Ltd Information recording plate

Patent Citations (3)

* 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
JPS52156605A (en) * 1976-06-18 1977-12-27 Thomson Brandt Data carrier and method of producing same
JPS5441703A (en) * 1977-09-09 1979-04-03 Hitachi Ltd Information recording plate

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