Layers; Shape, structure or physical properties thereof

Full Title

Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor > Record carriers characterised by shape, structure or physical properties, or by the selection of the material > Layers; Shape, structure or physical properties thereof

Classification Context

Section:

PHYSICS

Class:

INFORMATION STORAGE

Subclass:

INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER

Child Classifications

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• G11B 7/24033 Electrode layers
• G11B 7/24035 Recording layers
• G11B 7/24047 Substrates
• G11B 7/24053 Protective topcoat layers lying opposite to the light entrance side, e.g. layers for preventing electrostatic charging
• G11B 7/24056 Light transmission layers lying on the light entrance side and being thinner than the substrate, e.g. specially adapted for Blu-ray® discs
• G11B 7/24062 Reflective layers
• G11B 7/24065 Layers assisting in recording or reproduction below the optical diffraction limit, e.g. non-linear optical layers or structures
• G11B 7/24067 Combinations of two or more layers with specific interrelation