JPS57176548A - Information recording medium - Google Patents

Information recording medium

Info

Publication number
JPS57176548A
JPS57176548A JP56059537A JP5953781A JPS57176548A JP S57176548 A JPS57176548 A JP S57176548A JP 56059537 A JP56059537 A JP 56059537A JP 5953781 A JP5953781 A JP 5953781A JP S57176548 A JPS57176548 A JP S57176548A
Authority
JP
Japan
Prior art keywords
layer
information forming
forming layer
protect
recording 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
JP56059537A
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 JP56059537A priority Critical patent/JPS57176548A/en
Priority to US06/368,088 priority patent/US4449138A/en
Priority to NL8201556A priority patent/NL8201556A/en
Publication of JPS57176548A publication Critical patent/JPS57176548A/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

Landscapes

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

Abstract

PURPOSE:To protect the high sensitivity, by taking the information forming layer of two disc type recording media inside with each other, uniformly bonding them with an adhesives, vapor-depositing a transparent inorganic protective layer on the surface of the outside and preventing external adverse effect. CONSTITUTION:On one side of a base 1 (transparent plastic plate), an information forming layer 2 consisting of a recording layer and a light reflection layer is provided. This information forming layer 2 is made to the inside and the two layers 2 are laminated horizontally with an adhesive layer 4 (epoxy system). This base 1 has a hydrophilic nature and Te film or the like of the information forming layer is floated with contamination due to water and oxygen in air. To protect this, a laser disc recording medium 5 vacuum-deposited with a transparent inorganic protective layer 3 (oxide or fluoride of Si, Al and the like) is constituted. Through this sectional construction, accurate sensitivity for write/ read at storage or in use can be guaranteed.
JP56059537A 1981-04-15 1981-04-20 Information recording medium Pending JPS57176548A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP56059537A JPS57176548A (en) 1981-04-20 1981-04-20 Information recording medium
US06/368,088 US4449138A (en) 1981-04-15 1982-04-13 Information recording medium
NL8201556A NL8201556A (en) 1981-04-15 1982-04-14 REGISTRATION MEDIUM FOR INFORMATION.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56059537A JPS57176548A (en) 1981-04-20 1981-04-20 Information recording medium

Publications (1)

Publication Number Publication Date
JPS57176548A true JPS57176548A (en) 1982-10-29

Family

ID=13116107

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56059537A Pending JPS57176548A (en) 1981-04-15 1981-04-20 Information recording medium

Country Status (1)

Country Link
JP (1) JPS57176548A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058894A (en) * 1983-09-12 1985-04-05 Dainippon Printing Co Ltd Transfer sheet comprising optical recording layer
JPS61122949A (en) * 1984-11-16 1986-06-10 Matsushita Electric Ind Co Ltd Optical recording medium and its production

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058894A (en) * 1983-09-12 1985-04-05 Dainippon Printing Co Ltd Transfer sheet comprising optical recording layer
JPH0452238B2 (en) * 1983-09-12 1992-08-21 Dainippon Printing Co Ltd
JPS61122949A (en) * 1984-11-16 1986-06-10 Matsushita Electric Ind Co Ltd Optical recording medium and its production
JPH0535490B2 (en) * 1984-11-16 1993-05-26 Matsushita Electric Ind Co Ltd

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