EP0240800A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optical recording disc
Assignee: Maxell Ltd
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Filing: 1987-03-19
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Granted: —
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Expires: 2007-03-19
Abstract
Abstract In an optical recording disc comprising a triggering layer formed on a disc substrate through an adiabatic layer and a recording layer formed on the triggering layer, the triggering layer is made of material to be meltable or decomposable at a temperature lower than the melting point or decomposition point of the material of the recording layer.
Inventors
- 👤 Akira Gotoh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 16:03
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/26; G11B7/257; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24316; G11B2007/25705; G11B2007/25706; G11B2007/25713; G11B2007/25715; G11B2007/25716; G11B7/253; G11B7/2531; G11B7/2533; G11B7/2534; G11B7/2572; G11B7/2575; G11B7/2578
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
An optical recording disc comprising; a disc substrate, an adiabatic layer formed on one side surface of the disc substrate with light permeable material having a thermal deformation temperature higher than a thermal ' deformation temperature of the disc substrate, a triggering layer formed on said adiabatic layer with light permeable material, and a recording layer formed on said triggering layer, the material of said triggering layer being meltable or decomposable at a temperature lower than the melting point or decomposition point of the material of the recording layer.
Claim 2
Dependent Claim
89 words
An optical recording disc comprising; a disc substrate, an adiabatic layer formed on one side surface of the disc substrate with light permeable material having a thermal deformation temperature higher than a thermal ' deformation temperature of the disc substrate, a triggering layer formed on said adiabatic layer with light permeable material, and a recording layer formed on said triggering layer, the material of said triggering layer being meltable or decomposable at a temperature lower than the melting point or decomposition point of the material of the recording layer.
Claim 3
Dependent Claim
33 words
The optical recording disc according to claim 1, wherein said adiabatic layer is made of material having a thermal resistivity higher than 110°C and a thermal conductivity lower than 8 kcal/m h °C.
Claim 4
Dependent Claim
61 words
The optical recording disc according to claim 1, wherein said disc substrate is made of PMMA, PC or epoxy resin and the adiabatic layer is made of at least one sort of inorganic material selected from the group consisting of ZnS, Zr0 2 , SiO, Sio 2 Ti0 2 and MgF 2 , or organic material selected from polyimide and polyamidoxinide.
Claim 5
Dependent Claim
33 words
The optical recording disc according to claim 1, wherein said recording disc is made of Te or a low melting point metal mainly containing Te and said triggering layer is made of nitrocellulose.
Claim 6
Dependent Claim
33 words
The optical recording disc according to claim 1, wherein said recording disc is made of Te or a low melting point metal mainly containing Te and said triggering layer is made of polytetrafluoroethylene.
Claim 7
Dependent Claim
33 words
The optical recording disc according to claim 1, wherein said recording disc is made of Te or a low melting point metal mainly containing Te and said triggering layer is made of guanine.
Claim 8
Dependent Claim
43 words
The optical recording disc according to claim 1, wherein said recording disc is made of Te or a low melting point metal mainly containing Te and said triggering layer is made of plasma polymerized material having hydrocarbon, benzenemonomar, hexamethyldisilazanemonomar as a vapor source.
Claim 9
Dependent Claim
66 words
The optical recording disc according to claim 1, wherein said recording disc is made of Te or a low melting point metal mainly containing Te and said triggering layer is made of at least one sort of inorganic material selected from a group consisting of Sb 2 0 5 , Ag 2 0, Fe 2 N, Cu 3 N, TiS 2 , and WS 3 .
Claim 10
Dependent Claim
53 words
A method of the production of an optical recording disc defined in claim 1 comprising; a step of producing the adiabatic layer by sputtering, a step of producing the triggering layer by plasma polymerization and a step of producing the recording layer by sputtering, the respective steps being performed in the order consecutively.
Claim 11
Dependent Claim
36 words
A method of the production of an optical recording disc defined in claim 1, characterized in that the adiabatic layer, the triggering layer and the recording layer are respectively formed by sputtering consecutively in the order.
References Cited (Backward Citations)
No citation records indexed.
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