Optical recording medium

G - Physics – 11 – B

Patent

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Details

G11B 7/24 (2006.01) B32B 3/02 (2006.01) G11B 7/0045 (2006.01) G11B 7/005 (2006.01)

Patent

CA 2418459

A phase-modulation type optical recording medium comprising at least one layer of recording film (4) and at least one layer of metal film (3) on a recesses- formed substrate (1), wherein at least one layer of constituent film constituting the recording film consists of an organic matter that absorbs and breaks down a laser beam to have its refractive index changed, and the width of a recess (2) is 0.10 µm-0.21 µm, whereby providing a WORM type, high- density-recording optical recording medium capable of producing a high reproducing output.

L'invention concerne un support d'enregistrement optique de type à modulation de phase comprenant au moins une couche de film d'enregistrement (4) et au moins une couche de film métallique (3) placées sur un substrat à évidements. Ce support est caractérisé en ce qu'au moins une couche de film constituant le film d'enregistrement est conçue dans un matériau organique absorbant et fractionnant un faisceau laser de manière à changer son indice de réfraction et en ce que la largeur d'un évidement (2) est comprise entre 0,10 µm et 0,21 µm, un support d'enregistrement optique à densité d'enregistrement élevée de type WORM, capable de produire une sortie de lecture élevée étant obtenu.

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