Patent ID: 8194525
Filing Date: 2012-06-05
Classification: G11B

Abstract:
1. An information-readable information storage medium, comprising at least a first information storage area and a second information storage area, wherein: the first information storage area contains, in advance, first information which is either software or content; the second information storage area is either write-once or rewriteable and is available for writing second information for use by the first information; said medium includes on a substrate: information recording layers readable by a read beam; a transparent layer provided farthest from the substrate; and an intermediate layer separating the individual information recording layers; at least one of the information recording layers is a first information recording layer which is read-only; at least another one of the information recording layers is a second information recording layer which is either write-once or rewriteable; the first information storage area is allotted in the first information recording layer; and the second information storage area is allotted in the second information recording layer.