Optical disk having a hard coat layer
AssigneeTDK Corporation
InventorsShin-ichi Tezuka, Tsuneo Kuwahara
Life of this patent
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Abstract
An optical disk includes a resinous substrate and a recording layer thereon. A hard coat layer containing conductive particles is provided on a light incident side of the substrate for protecting the substrate from physical damages and rendering the disk antistatic for preventing dust deposition.
Claims4
An optical disk comprising a resinous substrate and a hard coat layer on at least a light incident side of the substrate, said hard coat layer having a thickness of 1-30 .mu.m and containing electroconductive particles transparent to recording and reproducing light and having a mean particle diameter of 3 to 30 nm, said hard coat layer comprising 10 to 70% by volume of electroconductive particles.
Dependencies are inferred from the claim text.