CPC Subgroup
G11B 7/24 Record carriers characterised by shape, structure or physical properties, or by the selection of the material (characterised by the arrangement of information on the carrier G11B7/007)
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 (G11B11/00, G11B13/00 take precedence) > Record carriers characterised by shape, structure or physical properties, or by the selection of the material (characterised by the arrangement of information on the carrier G11B7/007)
11 direct subcodes
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 (G11B7/24015 takes precedence)
- G11B 7/2403 Layers; Shape, structure or physical properties thereof
- G11B 7/2407 Tracks or pits; Shape, structure or physical properties thereof (layout of tracks or pits used as the identification information G11B7/007)
- 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 (within laminated discs G11B7/24021); Arrangements for testing, inspecting or evaluating; Containers, cartridges or cassettes
- G11B 7/241 characterised by the selection of the material
- G11B 7/26 Apparatus or processes specially adapted for the manufacture of record carriers