Patent ID: 7995452

Claim:
An optical data storage medium compatible with a digital versatile disk (DVD) drive, the medium comprising: a disk-shaped thermoplastic substrate defining a first side and a second side, wherein the first side includes replicated features and wherein the disk-shaped thermoplastic substrate defines a thickness over a substantial majority of the disk-shaped thermoplastic substrate of approximately 0.6 millimeters; a reflective layer formed directly on the first side of the disk-shaped thermoplastic substrate such that light from the DVD drive can pass through the disk-shaped thermoplastic substrate and reflect off the reflective layer back to the DVD drive; and a hard coat layer formed directly on the reflective layer, wherein the hard coat layer protects the replicated features, and wherein the reflective layer and the hard coat layer are sufficiently thin relative to the disk-shaped thermoplastic substrate such that the overall thickness of the optical data storage medium over a substantial majority of the optical data storage medium is approximately 0.6 millimeters.