JPS55122242A - Substrate for optical disc - Google Patents

Substrate for optical disc

Info

Publication number
JPS55122242A
JPS55122242A JP2649479A JP2649479A JPS55122242A JP S55122242 A JPS55122242 A JP S55122242A JP 2649479 A JP2649479 A JP 2649479A JP 2649479 A JP2649479 A JP 2649479A JP S55122242 A JPS55122242 A JP S55122242A
Authority
JP
Japan
Prior art keywords
glass
substrate
constitution
caused
optical disc
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
JP2649479A
Other languages
Japanese (ja)
Inventor
Koichi Ogawa
Hironori Goto
Nagaaki Etsuno
Seiya Ogawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2649479A priority Critical patent/JPS55122242A/en
Publication of JPS55122242A publication Critical patent/JPS55122242A/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
    • G11B7/252—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
    • G11B7/257—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 layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
    • 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
    • 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

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PURPOSE:To stop reaction between glass and Al to prevent corrosion of Al, by providing a chemically stable-material thin layer between the Al plate and glass. CONSTITUTION:Material 2 to prevent reaction between Al and glass, for example, a metal oxide or fluoride is caused to adhere to the surface of substrate 1 consisting of Al or Al alloy thinly and uniformly by evaporation, etc. Next, sodium glass 3 is caused to adhere onto this material 2, and recording medium 4 is formed on glass 3 after they are subjected to a prescribed heat treatment. By this constitution, a light and cheap substrate can be obtained.
JP2649479A 1979-03-07 1979-03-07 Substrate for optical disc Pending JPS55122242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2649479A JPS55122242A (en) 1979-03-07 1979-03-07 Substrate for optical disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2649479A JPS55122242A (en) 1979-03-07 1979-03-07 Substrate for optical disc

Publications (1)

Publication Number Publication Date
JPS55122242A true JPS55122242A (en) 1980-09-19

Family

ID=12195042

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2649479A Pending JPS55122242A (en) 1979-03-07 1979-03-07 Substrate for optical disc

Country Status (1)

Country Link
JP (1) JPS55122242A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59185049A (en) * 1983-03-28 1984-10-20 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Optical recording disc
JPS59217241A (en) * 1983-05-23 1984-12-07 Ricoh Co Ltd Optical information recording and storing medium
JPS60226041A (en) * 1984-04-25 1985-11-11 Hoya Corp Information glass substrate and its production

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59185049A (en) * 1983-03-28 1984-10-20 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Optical recording disc
JPH0414425B2 (en) * 1983-03-28 1992-03-12 Fuiritsupusu Furuuiranpenfuaburiken Nv
JPS59217241A (en) * 1983-05-23 1984-12-07 Ricoh Co Ltd Optical information recording and storing medium
JPS60226041A (en) * 1984-04-25 1985-11-11 Hoya Corp Information glass substrate and its production
JPH0348580B2 (en) * 1984-04-25 1991-07-24 Hoya Corp

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