Data carrier and method for producting it
OwnerOtto Berneckerinventor
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Abstract
The invention relates to a data carrier, such as an identity card, credit card or the like, with at least one plastic layer having first diffusely light-scattering properties at least in a partial area due to its surface quality. In this area information is provided by means of a laser in the form of local changes of surface quality which have second diffusely light-scattering properties so that the information is readable at least at a certain viewing angle but has no color contrast with its surroundings.
Claims19
A data carrier with at least one plastic layer bearing information, said carrier comprising:
- a first and a second area formed on said plastic layer,
- said first and a second areas having different light scattering properties and no color contrast,
- said light scattering properties of at least one of said first or second area being generated by a laser light.
A method of producing a data carrier comprising the steps of:
- providing a plastic layer;
- applying a laser beam to said plastic layer in a first way to form a first area on said plastic layer;
- and
- applying said laser beam to said plastic layer in a second way to form a second area on said plastic layer, said first and second areas having different light scattering properties to define information on said plastic layer;
- wherein said laser bean is applied at a laser power, said laser power being varied between said first and second way without discoloring said plastic layer while said first and second areas are formed.
Dependencies are inferred from the claim text.