Patent ID: 7509661
Filing Date: 2009-03-24
Classification: B29C,B29D,B29L,G11B

Abstract:
1. An optical disc comprising: a substrate which has a center hole; a recording layer which is provided concentrically on the substrate, whose diameter is shorter than that of the substrate, and on which information is recorded; a bonding layer which is provided on the recording layer and on the substrate so as to cover the recording layer, the bonding layer being made of ultraviolet cured resin; a transparent sheet layer which is bonded onto the bonding layer and whose diameter is shorter than that of the substrate; an overcoating layer which is formed on the transparent sheet layer and which is made of ultraviolet cured resin; and a materials-integration-layer which is formed on a side face of the substrate, the materials-integration-layer being formed integrally with the side face of the substrate and extended portions of the bonding layer and the overcoating layer.