provided with a special shape or structure for centering or eccentricity prevention, e.g. alignment

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 > Laminated discs > provided with a special shape or structure for centering or eccentricity prevention, e.g. alignment

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) > Laminated discs (G11B7/24015 takes precedence) > provided with a special shape or structure for centering or eccentricity prevention, e.g. alignment