JPS57103133A - Optical information recording carrier and its manufacture - Google Patents

Optical information recording carrier and its manufacture

Info

Publication number
JPS57103133A
JPS57103133A JP55178269A JP17826980A JPS57103133A JP S57103133 A JPS57103133 A JP S57103133A JP 55178269 A JP55178269 A JP 55178269A JP 17826980 A JP17826980 A JP 17826980A JP S57103133 A JPS57103133 A JP S57103133A
Authority
JP
Japan
Prior art keywords
protective layer
manufacture
information recording
optical information
recording carrier
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.)
Granted
Application number
JP55178269A
Other languages
Japanese (ja)
Other versions
JPS6252369B2 (en
Inventor
Takafumi Sugano
Toshiaki Kashihara
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55178269A priority Critical patent/JPS57103133A/en
Publication of JPS57103133A publication Critical patent/JPS57103133A/en
Publication of JPS6252369B2 publication Critical patent/JPS6252369B2/ja
Granted 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

Abstract

PURPOSE:To obtain a durable protective layer for a disk by stacking sheets of a high-polymer material formed by calendering so that each sheet has a different drawing-out direction during the formation. CONSTITUTION:High polymer material sheets A-D are stacked, as shown by (a), at different angles of respective molecular chains so that the total rotary power is minimized, and they are pressed thermally into one protective layer 40. This protective layer 40 is pressed previously by a stamper as shown by (b) and stuck to a disk body 45 to obtain an optical disk with the protective layer as shown by (c). Consequently, brittleness which is the basic defective of an acrylic material is eliminated and as the material of the protective layer, a material containing polyvinyl chloride is usable.
JP55178269A 1980-12-16 1980-12-16 Optical information recording carrier and its manufacture Granted JPS57103133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55178269A JPS57103133A (en) 1980-12-16 1980-12-16 Optical information recording carrier and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55178269A JPS57103133A (en) 1980-12-16 1980-12-16 Optical information recording carrier and its manufacture

Publications (2)

Publication Number Publication Date
JPS57103133A true JPS57103133A (en) 1982-06-26
JPS6252369B2 JPS6252369B2 (en) 1987-11-05

Family

ID=16045525

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55178269A Granted JPS57103133A (en) 1980-12-16 1980-12-16 Optical information recording carrier and its manufacture

Country Status (1)

Country Link
JP (1) JPS57103133A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6034663U (en) * 1983-08-15 1985-03-09 ソニー株式会社 optical information card
JPS6034664U (en) * 1983-08-15 1985-03-09 ソニー株式会社 optical information card

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6034663U (en) * 1983-08-15 1985-03-09 ソニー株式会社 optical information card
JPS6034664U (en) * 1983-08-15 1985-03-09 ソニー株式会社 optical information card
JPH039077Y2 (en) * 1983-08-15 1991-03-07

Also Published As

Publication number Publication date
JPS6252369B2 (en) 1987-11-05

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