Optical information recording medium and method for producing the same
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsEiji Ohno, Hidemi Isomura, Akihiro Moteki
Life of this patent
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Abstract
An optical information recording medium includes a first substrate; at least a first dielectric layer and a recording layer for signal recording provided on a surface of the first substrate; and a second substrate. The first substrate and the second substrate are assembled together in the state of being warped in planar symmetry and flattened. The first dielectric layer and the recording layer is interposed between the first substrate and the second substrate.
Claims39
An optical information recording medium, comprising:
- a first substrate;
- at least a first dielectric layer and a recording layer for signal recording provided on a surface of the first substrate;
- and
- a second substrate,
- wherein the first substrate and the second substrate are assembled together in the state of being warped in planar symmetry with respect to each other and flattened, the first dielectric layer and the recording layer being interposed between the first substrate and the second substrate.
An optical information recording medium, comprising:
- a first substrate;
- at least a first dielectric layer and a recording layer for signal recording provided on a surface of the first substrate;
- a second substrate;
- and
- a thin layer on which a signal is unrecordable, the thin layer being provided on a surface of the second substrate,
- wherein the first substrate and the second substrate are assembled together with the first dielectric layer, the recording layer and the thin layer being interposed therebetween.
An optical information recording medium, comprising:
- a first substrate;
- a plurality of first dielectric layers, a recording layer for signal recording provided between the plurality of dielectric layers, and a metal layer, which are provided on a surface of the first substrate;
- a second substrate;
- and
- a thin layer, including at least one second dielectric layer and a metal layer, on which a signal is unrecordable, the thin layer being provided on a surface of the second substrate,
- wherein the first substrate and the second substrate are assembled together with the plurality of first dielectric layers, the at least one second dielectric layer, the recording layer, the metal layer, and the thin metal layer being interposed therebetween.
An optical information recording medium, comprising:
- a first substrate;
- at least a dielectric layer and a recording layer for signal recording provided on a surface of the first substrate;
- a second substrate;
- and
- a resin layer formed of a resin which shrinks when being cured, the resin layer being provided on a surface of the second substrate,
- wherein the first substrate and the second substrate are assembled together with the dielectric layer and the recording layer being interposed therebetween, and the resin layer is not interposed therebetween.
An optical information recording medium, comprising:
- a first substrate;
- at least a dielectric layer, a recording layer for signal recording provided on a surface of the first substrate, and a first resin layer formed of a resin which shrinks when being cured;
- and
- a second substrate,
- wherein the first substrate and the second substrate are assembled together with the dielectric layer, the recording layer and the first resin layer being interposed therebetween.
A method for producing an optical information recording medium, comprising the steps of:
- forming at least a first dielectric layer and a recording layer for signal recording on a surface of a first substrate;
- warping a second substrate;
- and
- assembling the first substrate, which is warped, and the second substrate in planar symmetry with respect to each other, and flattening an assembly of the first substrate and the second substrate.
A method for producing an optical information recording medium, comprising the steps of:
- forming at least a dielectric layer and a recording layer for signal recording on a surface of a first substrate;
- forming a resin layer of a resin which shrinks when being cured on the recording layer;
- and
- assembling the first substrate and a second substrate opposed to the first substrate with the dielectric layer and the recording layer being interposed therebetween.
Dependencies are inferred from the claim text.