OPTICAL DISC AND METHOD FOR MANUFACTURING THE SAME

摘要

An optical disc includes a recording film formed on one surface of a disc-shaped plastics substrate having light transmission properties, and an antistatic film formed on the other surface of the substrate to which an optical beam is applied, in which the plastics substrate is made by injection molding and a U-shaped annular groove or ridge is formed on the whole circumference on the surface, a radius of which is a distance between the center and a joint position of an injection mold, and a method for manufacturing the same.