Patent ID: 7014902
Filing Date: 2006-03-21
Classification: G11B,Y10T

Abstract:
1. An optical disc comprising: a light-transmissive substrate; a recording layer, a reflective layer, and a protective layer provided, in that order, on one surface of the substrate; and a hard coating layer having a thickness in the range of 1 to 5 μm on another surface of the substrate, wherein the hard coating layer is produced by a process comprising applying to the substrate and curing a solution comprising a hard coating agent containing colloidal silica, a UV-curable acrylic resin, and a solvent principally containing butyl acetate; and the hard coating layer comprises the colloidal silica, a cured resin consisting of the UV-curable acrylic resin after the curing, and 10 to 90 mg/cm