EP0233034A2
Expired / Lapsed
EP
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Optical memory element
Assignee: Sharp Corp
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Filing: 1987-02-02
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Granted: —
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Expires: 2007-02-02
Abstract
Abstract An optical memory element contains a first reflector film made of a material of sufficiently large light reflectance in the relative sense and a second reflector film made of a material of sufficiently small thermal conductivity in the relative sense.
Inventors
- 👤 Miyake Tomoyuki
- 👤 Murakami Yoshiteru
- 👤 Katayama Hiroyuki
- 👤 Takahashi Akira
- 👤 Ohta Kenji
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 02:06
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/258; G11B11/00; G11B11/10; G11B11/105; G11B11/10582; G11B11/10586; G11B11/10589; G11B13/00; G11B13/04; G11B13/045; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24306; G11B7/257; G11B2007/25705; G11B2007/25708; G11B2007/25713; G11B7/253; G11B7/2531; G11B7/2533; G11B7/2534; G11B7/2585; G11B7/259; G11B7/2595; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
An optical memory element comprising: a substrate; a recording medium film formed on said substrate; and a reflector film in two layers comprising a first layer o a material of sufficiently large optical reflectance in the relative sense and a second layer of a material of sufficiently small thermal conductivity in the relative sense.
Claim 2
Dependent Claim
54 words
An optical memory element comprising: a substrate; a recording medium film formed on said substrate; and a reflector film in two layers comprising a first layer o a material of sufficiently large optical reflectance in the relative sense and a second layer of a material of sufficiently small thermal conductivity in the relative sense.
Claim 3
Dependent Claim
33 words
The optical memory element of claim 1, further comprising: a dielectric film formed at least between the substrate and the recording medium film or between the recording medium film and the reflector film.
Claim 4
Dependent Claim
49 words
An optical memory element which includes a film (3) of optical recording medium and a reflector film (6, 7) characterized in that said reflector film, is a plural-layer film comprising a first layer (6) of relatively high optical reflectivity and a second layer (7) of relatively low thermal conductivity.
Claim 5
Dependent Claim
49 words
An optical memory element which includes a film (3) of optical recording medium and a reflector film (6, 7) characterized in that said reflector film, is a plural-layer film comprising a first layer (6) of relatively high optical reflectivity and a second layer (7) of relatively low thermal conductivity.
Claim 6
Dependent Claim
42 words
An optical memory element according to claim 3 characterized in that said first layer (6) of the reflector film is of relatively high thermal conductivity and in that said second layer (7) of the reflector film is of relatively low optical reflectivity.
Claim 7
Dependent Claim
32 words
An optical memory element according to claim 3 or claim 4 characterized in that the reflector film is disposed with its said first layer (6) closest to the optical recording medium film.
Claim 8
Dependent Claim
54 words
An optical memory element according to any of claims 3 to 5 characterized by the provision of a dielectric film (2) between a light-transmissive substrate (1) of the element and the optical recording medium film (3) and/or a dielectric film (4) between the optical recording medium film (3) and the reflector film (6, 7).
Claim 9
Dependent Claim
25 words
An optical memory element according to any of claims 3 to 6 characterized in that said first layer comprises a metal of relatively high reflectance.
Claim 10
Dependent Claim
28 words
An optical memory element according to claim 7 characterized in that said metal of the first layer is selected from the group comprising Cu, Al, Au, and Ag.
Claim 11
Dependent Claim
28 words
An optical memory element according to any of claims 3 to 6 characterized in that said first layer comprises cyanine type pigment, merocyanine pigment or a dioxazine compound.
Claim 12
Dependent Claim
37 words
An optical memory element according to any of claims 3 to 9 characterized in that the second layer comprises Ni, Th, Ta, Pb, Zr, Bi, Te, Se, or an alloy of low thermal conductivity, such as AlNi.
References Cited (Backward Citations)
No citation records indexed.
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