Patent ID: 7425894
Filing Date: 2008-09-16
Classification: G06K

Abstract:
1. A security element for RF identification, wherein the security element has a flexible, electrically non-conducting substrate layer and a first electrically conductive layer of an electrically conducting material which is applied to the substrate layer and which in a first surface region is shaped out in pattern form to form an RF component, wherein a first relief structure with grooves for altering electrical properties of the RF component is shaped at least in region-wise manner in the surface region, associated with the RF component, in the first electrically conductive layer, wherein the first electrically conductive layer is shaped out in the first surface region in the form of an RF antenna or a coil, that in the region of the conductive layer which is associated with the RF antenna or the coil the grooves of the relief structure are oriented on average more longitudinally relative to the direction of flow of the electric current than transversely with respect to the direction of flow of the electric current, and that the relief structure has a profile depth in the range of 50 nm to 10 μm and a spatial frequency in the range of 100 to 2000 lines per mm, wherein the grooves of the relief structure are provided both in the surface of the first electrically conducting layer, which is towards the substrate layer, and also in the surface of the first electrically conducting layer, which is remote from the substrate layer.