Method of providing a security document with a security feature, and security document
AssigneeFabrica Nacional de Moneda y Timbre-Real Casa de la Moneda
InventorsVicente GARCIA JUEZ, Javier GAMO ARANDA, Luis BORRUEL NAVARRO
Life of this patent
Estimating the term…
Abstract
A method of providing a security document with a security feature includes the steps of providing a conductive layer, and removing part of the conductive layer to convert at least a portion of the conductive layer into a metamaterial. The metamaterial is selected to provide for authentication of the security document. It is possible to obtain a security document with this method and to subsequently authenticate the security document.
Claims18
A method of providing a security document with a security feature, including the following steps:
- providing a conductive layer, removing part of said conductive layer to convert at least a portion of said conductive layer into a metamaterial selected to provide for authentication of the security document, and wherein said step of removing part of said conductive layer further includes the step of leaving parts of said conductive layer separated from other parts of said conductive layer, or removing said part of said conductive layer so as to form through holes in said conductive layer.
A security document, comprising a document substrate, said document substrate being a paper substrate, said security document further comprising a security element embedded in said document substrate, said security element comprising an element substrate, wherein said element substrate is provided with a portion of conductive material forming a metamaterial arranged to provide for authentication of the security document and
- wherein said element substrate is a substrate in the form of a cellulose strip or patch, such as a paper or cellophane strip or patch.
(canceled)
Dependencies are inferred from the claim text.