Patent EP0178836A2 successfully refreshed from Google Patents.
EP0178836A2
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Optical disc
Assignee: Polyplastics Co Ltd
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Filing: 1985-10-08
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Granted: —
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Expires: 2005-10-08
Abstract
Abstract An optical disc comprises a substrate formed from a polymer being capable of the anisotropic melt phase and being melt-processable, a recording layer having pits and grooves, formed on the substrate and a metal coating layer formed on the recording.
Inventors
- 👤 Yukio Ikenaga
- 👤 Katsuhiko Takahashi
- 👤 Tsuneyoshi Okada
- 👤 Kenji Hijikata
- 👤 Toshio Kanoe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 01:11
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/24018; G11B7/241; G11B7/252; G11B7/253; G11B7/2533; G11B7/254; G11B7/2542; C; C09; C09K; C09K2323/00; G11B7/2534; G11B7/2535; G11B7/2536; G11B7/258; G11B7/2585; G11B7/259; G11B7/2595; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
42 words
'An optical disc which comprises a substrate formed from a polymer being capable of the anisotropic melt phase and being melt-processable, a recording layer having pits and grooves, formed on the substrate, and a metal coating layer, formed on the recording layer.
Claim 2
Dependent Claim
42 words
'An optical disc which comprises a substrate formed from a polymer being capable of the anisotropic melt phase and being melt-processable, a recording layer having pits and grooves, formed on the substrate, and a metal coating layer, formed on the recording layer.
Claim 3
Dependent Claim
20 words
An optical disc as claimed in claim 1, which further comprises a light-transmitting, surface-protecting layer on the metal coating layer.
Claim 4
Dependent Claim
21 words
An optical disc as claimed in claim 2, in which the light-transmitting, surface-protecting layer has been formed of a transparent resin.
Claim 5
Dependent Claim
25 words
An optical disc as claimed in claim 1 or 2, in which the recording layer has been placed only on one side of the substrate.
Claim 6
Dependent Claim
24 words
An optical disc as claimed in claim 1 or 2, in which the recording layer has been provided on each side of the substrate.
Claim 7
Dependent Claim
32 words
An optical disc which has been obtained by assembling two optical disc as defined in claim 1 or 2 by attaching them to each other on the rear surfaces of the substrates.
Claim 8
Dependent Claim
20 words
An optical disc as claimed in claim 1. in which the polymer for the substrate is in the anisotropic phase.
Claim 9
Dependent Claim
23 words
An optical disc as claimed in claim 1, in which the substrate is of a polymer composition comprising said polymer and another polymer.
References Cited (Backward Citations)
No citation records indexed.
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