Optical information recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorMichihiro Shibata
Life of this patent
Estimating the term…
Abstract
An optical information recording medium includes a substrate having a thickness of approximately 1.0 mm to 1.2 mm, with a spiral pre-groove being formed at a predetermined area on the substrate excluding a central hole and an outer periphery. Successively disposed on the area at which the pre-groove is formed are a light-reflective layer, a recording layer that can record information when irradiated with light having a wavelength range of 380 nm to 500 nm, a protective layer for protecting the recording layer, an adhesive layer made of a photocurable resin that has been cured by being irradiated with visible light, and a thin transparent protective layer.
Claims20
An optical information recording medium, comprising, in sequence from the base layer upwards:
- a substrate base;
- a light-reflective layer formed over the substrate;
- a recording layer, which records information when irradiated with laser light, formed over the light-reflective layer;
- and
- a thin protective layer formed directly on the recording layer, the thin protective layer transmitting laser light used for information recording and reproduction and being made of a photocurable resin that has been cured by being irradiated with visible light, wherein the visible light does not include ultraviolet light.
An optical information recording medium, comprising, in sequence from the base layer upwards:
- a substrate base;
- a light-reflective layer formed over the substrate;
- a recording layer formed over the light-reflective layer, which records information when irradiated with laser light;
- an adhesive layer formed over the recording layer, the adhesive layer being made of a photocurable resin that has been cured by being irradiated with visible light, wherein the visible light does not include ultraviolet light;
- and
- a thin protective layer formed over the adhesive layer, the thin protective layer transmitting laser light used for information recording and reproduction.
Dependencies are inferred from the claim text.