Patent ID: 6319580
Filing Date: 2001-11-20
Classification: G11B,Y10S,Y10T

Abstract:
A recording disk comprising a substrate including a plastic material, and an overlay arranged over the substrate and including a recording substance for recording therein an information, wherein a radially-outer periphery of the overlay is substantially within a radially-outer periphery of the substrate as seen in an axial direction of the recording disk, wherein the substrate includes a main surface which extends substantially perpendicular to the axial direction and on which the overlay is arranged, and a side surface which extends radially outward from the main surface and is prevented from extending parallel to the main surface, the overlay includes a front surface extending substantially parallel to the main surface and exposed to the environment of the recording disk and an edge surface extending radially outward from the front surface, prevented from extending parallel to the front surface and exposed to the environment of the recording disk, and a radially-outer periphery of the front surface is substantially within a boundary between the main surface and the side surface as seen in the axial direction.