Data carrier having security marking

Details Data carrier having security marking Data carrier having security marking

B - Operations, Transporting

42

D

B42D 15/10 (2006.01)

Patent

CA 2687783

The invention relates to a multi-layered data storage medium (100) comprising a substrate (10) on which a security element (30) with a metal layer (32) is formed, said element having an optical effect from an observation side. Cavities (50) that have a characteristic (60) are introduced into the metal layer (32) and are not visible or are extremely difficult to recognise in daylight to the naked eye. The presence of the characteristic (60) can be recognised at an appropriate angle and under suitable lighting. Preferably, a fluorescent layer (20) is provided under the metal layer (32), said fluorescent layer allowing the characteristic (60) to be visible under lighting with UV-light.

L'invention concerne un support de données (100) multicouche comprenant un substrat (10) sur lequel est formé un élément de sécurité (30) avec une couche métallique (32), qui présente un effet optique à partir d'une face d'observation. Des cavités (50) qui présentent une caractéristique (60) sont ménagées dans la couche métallique (32) et ne sont pas perceptibles ou seulement difficilement, à l'oeil nu, à la lumière du jour. La présence de la caractéristique (60) peut néanmoins être identifiée selon un angle d'observation approprié et avec un éclairage approprié. Il est prévu de préférence une couche fluorescente (20) sur la couche métallique (32), qui permet de visualiser la caractéristique (60) en cas d'éclairage avec lumière ultraviolette.

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