Patent ID: 8518513
Filing Date: 2013-08-27
Classification: G11B,Y10T

Abstract:
1. A multilayer optical recording medium with at least six or more recording and reading layers disposed one above the other with intermediate layers interposed therebetween, wherein information can be read by light irradiation, the multilayer optical recording medium comprising at least two or more recording and reading layer groups each including the plurality of recording and reading layers successively disposed one above the other in an order in which the layers are stacked so that reflectance of each of the recording and reading layers in a stacked state in each of the groups decreases in the order from a front side near a light incident surface toward a back side far from the light incident surface, wherein regarding the recording and reading layer groups adjacent to each other with any of the intermediate layers interposed therebetween, a recording and reading layer nearest the front side among the recording and reading layers in the recording and reading layer group nearer the back side has a reflectance in a stacked state higher than that of a recording and reading layer nearest the back side among the recording and reading layers in the recording and reading layer group nearer the front side.