Optical information recording medium, method for manufacturing the same, and method for recording and/or reproducing optical information
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazuya Hisada, Kazuhiro Hayashi, Eiji Ohno
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Abstract
The present invention presents an optical information recording medium in which deformations brought about by changes to the environmental conditions are suppressed. The recording medium includes a transparent resin layer, a resin substrate that is thicker than the transparent resin layer, and an information recording layer disposed between the transparent resin layer and the resin substrate. A moisture absorption prevention film is formed on at least a portion of an outer principal surface of the resin substrate.
Claims21
An optical information recording medium comprising:
- a transparent resin layer;
- a resin substrate that is thicker than the transparent resin layer;
- and
- an information recording layer disposed between the transparent resin layer and the resin substrate;
- wherein a moisture absorption prevention film is formed on only a portion of an outer principal surface of the resin substrate.
An optical information recording medium comprising:
- a transparent resin layer;
- a resin substrate that is thicker than the transparent resin layer;
- and
- an information recording layer disposed between the transparent resin layer and the resin substrate;
- wherein a first moisture absorption prevention film is formed on at least a portion of an outer principal surface of the resin substrate, and
- a second moisture absorption prevention film is formed on at least a portion of an outer principal surface of the transparent resin layer.
An optical information recording medium comprising:
- a transparent resin layer;
- a resin substrate that is thicker than the transparent resin layer;
- an information recording layer disposed between the transparent resin layer and the resin substrate;
- and
- a moisture absorption prevention film having a film area set in accordance with a thickness and a material of the resin substrate,
- wherein the transparent resin layer is formed on at least a portion of an outer principal surface of the resin substrate.
Dependencies are inferred from the claim text.