Patent ID: 8315147
Filing Date: 2012-11-20
Classification: G11B

Abstract:
1. A multilayer optical recording medium comprising: at least three recording layers, wherein each of the recording layers includes an information recording area, wherein the recording layers other than a nearest recording layer and a furthest recording layer, when viewed from a light incident side, each include a first annular area having uneven patterns formed thereon and a second annular area having uneven patterns formed thereon, with the first annular area being adjacent to an inner side of the information recording area, and the second annular area being adjacent to an outer side of the information recording area, and wherein the recording layers other than the nearest recording layer and the furthest recording layer, when viewed from the light incident side, each include the first annular area, a lead-in area, a data area, a lead-out area, and the second annular area which are disposed radially in order from an inner side of the multilayer optical recording medium towards an outer side of the multilayer optical recording medium.