Patent ID: 8561093
Filing Date: 2013-10-15
Classification: G11B

Abstract:
1. An optical data storage medium comprising: a disk-shaped member comprising a first major surface, a data layer and a second major surface; a plurality of protrusions protruding from the first major surface of the disk-shaped member in a clamping area thereof; and a plurality of mated recesses in the second major surface of the disk-shaped member, the mated recesses defining a different pattern in the second major surface than the plurality of protrusions protruding from the first major surface, wherein a plurality of axes of the protrusions substantially correspond to the plurality of mated recesses with respect to axial alignment; wherein the first and second major surfaces define a thickness profile of less than 1.2 millimeters (mm) for the disk-shaped member; wherein the plurality of protrusions and the second major surface define a clamping thickness of approximately 1.2 mm in the clamping area of the disk-shaped member; and wherein the plurality of mated recesses define at least one mated recess depth in the second major surface of the disk-shaped member, the mated recesses corresponding to the plurality of protrusions protruding from the first surface of the disk-shaped member, such that the optical data storage medium has an average stacking thickness of less than 1.2 mm in a stack of optical storage media having a substantially same configuration.