Identity card protected from unauthorized reproduction with a copying machine
AssigneeGiesecke & Devrient GmbH
InventorBernhard Solmsdorf
Life of this patent
Estimating the term…
Abstract
The invention relates to an identity card or similar data carrier having a copy protection element. The copy protection element contains a metal layer in which markings are incorporated with the aid of a laser beam by completely removing the metal layer in the area of the markings. The copy protection effect is produced by combining at least partial areas of an additional layer with the metal layer so that the marks are not electrophotographically reproducible, or not in accordance with the original, as such or in combination with the metal layer.
Claims25
An identity card or data carrier having a copy protection element provided in at least a partial area, said copy protection element comprising:
- a first layer;
- and
- a metal layer formed on top of the first layer, wherein the metal layer includes markings formed by selective localized removal of the metal layer using a laser beam to expose parts of the first layer, said first layer being formed to at least one of absorb and directly reflect incident radiation of the visible spectral range passing through the markings of the metal layer in at least the exposed parts of the first layer which lie under the markings whereby electrophotographic reproduction of the markings is prevented.
An identity card or data carrier having a copy protection element provided in at least a partial area, said copy protection element comprising:
- a metal layer;
- and
- a first layer formed on top of the metal layer, said first layer being sensitized to laser radiation, said first layer having markings incorporated thereinto with a laser beam, said markings are visible to the human eye and formed to absorb incident radiation of the visible spectral range, wherein the visible spectral radiation is absorbed by said markings while passing through unmarked portions of said first layer to said metal layer, whereby electrophotographic reproduction of the marks is prevented.
Dependencies are inferred from the claim text.