Patent ID: 8675464

Claim:
An optical storage medium comprising: a substrate disk having a first data pattern embossed in a major side thereof; a first reflective layer formed over the embossed substrate data pattern and configured to be read through the substrate disk; a first intermediate layer disposed on the first reflective layer opposite the substrate disk; a second reflective layer disposed on the first intermediate layer opposite the first reflective layer, the second reflective layer having a second data pattern formed in a major surface thereof and being configured to be read from a direction opposite the substrate disk; and a cover layer formed over the second reflective layer opposite the first intermediate layer having an exposed outer surface opposite the second reflective layer, wherein the substrate disk has a thickness within a range of about 1.1 mm to 1.3 mm, the first intermediate layer has a thickness of about 20 μm, and the cover layer has a thickness within a range of 97 μm to 103 μm.