Patent ID: 6798732
Filing Date: 2004-09-28
Classification: B82Y,G11B,Y10T

Abstract:
An optical data storage system, comprising:an optical storage medium, comprising: a substrate having an unevenness structure of a track pitch of 0.3-0.4 micrometers and a groove depth of 50-800 angstroms, a reflective layer formed on the substrate and having a thickness of 100-400 angstroms, a first dielectric layer formed on the reflective layer and having a thickness of 5-100 micrometers, a recording layer formed on the first dielectric layer and having a thickness of 150-400 angstroms, a light transmissive protective layer formed on the recording layer and having a thickness in a range including 5 and 100 micrometers, and a lubricant film formed on the protective layer and having a thickness of 1-3 nm and which does not chemically react with said protective layer; and an optical pickup which generates a near field and emits a light beam to write and/or read information to/from the optical storage medium.