Data carrier with see-through window and method for producing it
AssigneeGemalto SA
InventorsTaru Syrjänen, Teemu Pohjola
Life of this patent
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Abstract
A data carrier is provided having a see-through portion (24) that allows revealing security features (36) with a different appearance on each of its sides (S1, S2) under special lighting conditions, and a method for making such a data carrier. The see-through portion has an improved security, which is more difficult to reproduce by infringers.
Claims15
A data carrier having a see-through portion, the see-through portion of the data carrier comprising:
- at least one translucent layer;
- security markings provided within the see-through portion;
- a developer material provided within the see-through portion, the developer material changing the appearance of the security markings when read from a first side of the see-through portion under specific lighting conditions;
- and
- a filtering material provided within the see-through portion the filtering material at least partially filtering lighting radiations, such that the security markings have another appearance from a second side of the see-through portion, which is different from the appearance readable from the first side, wherein the security markings are located between the developer material and the filtering material, wherein the at least one translucent layer is positioned between the security markings and either the developer material or the filtering material.
A method for producing a data carrier comprising a see-through portion having a first side and a second side, the see-through portion of the data carrier comprising at least one translucent layer and security markings, the method comprising:
- providing a developer material in the see-through portion, the developer material being configured to change the appearance of the security markings when read from the first side under specific lighting conditions, and
- providing a filtering material in the see-through portion for filtering the lighting radiations at least partially, so that the security markings have another appearance from the second side, which is different from the first appearance visible from the first side, wherein the security markings are located between the developer material and the filtering material, wherein the at least one translucent layer is positioned between the security markings and either the developer material or the filtering material.
Dependencies are inferred from the claim text.