Record carriers characterised by shape, structure or physical properties, or by the selection of the material

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

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 7/24003 Shapes of record carriers other than disc shape
• G11B 7/24015 Air-sandwiched discs
• G11B 7/24018 Laminated discs
• G11B 7/2403 Layers; Shape, structure or physical properties thereof
• G11B 7/2407 Tracks or pits; Shape, structure or physical properties thereof
• G11B 7/24094 Indication parts or information parts for identification
• G11B 7/24097 Structures for detection, control, recording operation or replay operation; Special shapes or structures for centering or eccentricity prevention; Arrangements for testing, inspecting or evaluating; Containers, cartridges or cassettes
• G11B 7/241 Record carriers characterised by the selection of the material
• G11B 7/26 Apparatus or processes specially adapted for the manufacture of record carriers