Optical storage medium comprising a super-resolution layer and a read-only data layer

摘要

The optical storage medium comprises a substrate layer (2), a read-only data layer (3) having a pit/land data structure with data arranged in tracks on the substrate layer (2), a thermal layer (5) disposed on the data layer (3), and a super-resolution layer (6) disposed on the thermal layer (5) comprising a nonlinear material for providing a super-resolution effect. The thermal layer (5) and the super-resolution layer (6) each have a thickness being smaller than the depth of the pits, and the pits are arranged with steep walls for isolating the nonlinear material (33) disposed in the pits (30) from the nonlinear material (34) disposed on the surrounding land area of the pits (30). The thermal layer comprises in particular a dielectric layer and/or a metallic layer.