JPS57152551A - High-density information recording disk - Google Patents

High-density information recording disk

Info

Publication number
JPS57152551A
JPS57152551A JP56039101A JP3910181A JPS57152551A JP S57152551 A JPS57152551 A JP S57152551A JP 56039101 A JP56039101 A JP 56039101A JP 3910181 A JP3910181 A JP 3910181A JP S57152551 A JPS57152551 A JP S57152551A
Authority
JP
Japan
Prior art keywords
resin
disk
biscuit
information recording
recording disk
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
JP56039101A
Other languages
Japanese (ja)
Inventor
Takeshi Moriwaki
Shinji Tokuhara
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.)
Daicel Corp
Original Assignee
Daicel Corp
Daicel Chemical Industries 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 Daicel Corp, Daicel Chemical Industries Ltd filed Critical Daicel Corp
Priority to JP56039101A priority Critical patent/JPS57152551A/en
Publication of JPS57152551A publication Critical patent/JPS57152551A/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
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0057—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PURPOSE:To improve the heat resistance of a disk manufactured in compression formation, by using non-halogen resin as a transparent plastic material used for the disk. CONSTITUTION:Transparent resin used for manufacturing a video disk, etc., is non-halogen resin, such as ester methacrylate resin and aromatic vinyl resin, having light-beam transmittivity. For the compression formation of the disk, the resin is fused and kneaded temporarily by an extruder to be extruded by a prescribed amount thus forming a lump of biscuit. This biscuit is mounted on a heated stamper and then compressed between upper and lower stampers to transfer pits which correspond to an information signal.
JP56039101A 1981-03-17 1981-03-17 High-density information recording disk Pending JPS57152551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56039101A JPS57152551A (en) 1981-03-17 1981-03-17 High-density information recording disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56039101A JPS57152551A (en) 1981-03-17 1981-03-17 High-density information recording disk

Publications (1)

Publication Number Publication Date
JPS57152551A true JPS57152551A (en) 1982-09-20

Family

ID=12543675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56039101A Pending JPS57152551A (en) 1981-03-17 1981-03-17 High-density information recording disk

Country Status (1)

Country Link
JP (1) JPS57152551A (en)

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