Data carrier and method for producting it
First Claim
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1. 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.
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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.
33 Citations
19 Claims
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1. A data carrier with at least one plastic layer bearing information, said carrier comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 19)
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15. A method of producing a data carrier comprising the steps of:
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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. - View Dependent Claims (16, 17, 18)
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Specification