EP0163810A2
Expired / Lapsed
EP
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Optical information recording carrier
Assignee: Daicel Corp
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Filing: 1985-02-21
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Granted: —
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Expires: 2005-02-21
Abstract
Abstract The invention concerns an optical information recording carrier comprising an inorganic glass layer.
Inventors
- 👤 Nagayoshi Tsukane
- 👤 Masaru Sato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 17:51
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/254; G11B7/2548; G11B11/00; G11B11/10; G11B11/105; G11B11/10582; G11B11/10586; G11B5/00; G11B5/62; G11B5/73; G11B5/7368; G11B5/739; G11B5/73923; G11B7/2403; G11B7/257; G11B7/2578; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24306; G11B2007/25705; G11B2007/25706; G11B2007/25708; G11B2007/2571; G11B2007/25715; G11B7/253; G11B7/2533; G11B7/2534
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
(1) An optical information recording carrier comprising a substrate made of transparent plastic and a high-density information recording layer disposed on said substrate, wherein a thin film layer made of inorganic glass is disposed between said substrate and said high-density information recording layer.
Claim 2
Dependent Claim
29 words
(2) The optical information recording carrier as defined in claim 1, wherein the thickness of the thin film layer made of inorganic glass is between 100 - 2000 Å.
Claim 3
Dependent Claim
20 words
(3) The optical information recording carrier as defined in claim 1 or 2, wherein the inorganic glass is non-alkali glass.
Claim 4
Dependent Claim
49 words
(4) The optical information recording carrier as defined in claim 1, wherein a surface protection layer made of inorganic glass is further formed on the surface of the high density information recording layer at the side opposite to the layer of inorganic glass defined in claims 1 to 3.
Claim 5
Dependent Claim
31 words
(5) The optical information recording carrier as defined in claim 1, wherein the high density information recording layer comprises a magneto-optic recording medium layer made of rare earth/transition metal amorphous alloy.
Claim 6
Dependent Claim
23 words
(6) The optical information recording carrier as defined in claim 1, wherein the substrate made of transparent plastic is formed with polycarbonate resin.
Claim 7
Dependent Claim
43 words
(7) The optical information recording carrier as defined in claim 1, wherein an outer surface protection layer made of inorganic glass is further formed on the outer surface of the transparent plastic substrate at the side opposite to the magneto-optic recording medium layer.
References Cited (Backward Citations)
No citation records indexed.
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