Patent ID: 6796508
Filing Date: 2004-09-28
Classification: G06K,G08B

Abstract:
RFID label for identification of an article comprising a substrate made of a plastic film and conductive surfaces on the front and the back side of the substrate, the conductive surfaces forming, a plurality of electrical components including an electrical resonant circuit which comprises a coil with at least one coil winding and a capacitor with a first capacitor plate on the front side of the substrate and a second capacitor plate on the back side of the substrate with a first conductive surface being arranged on the front side of the substrate conductively connected with the second plate of the capacitor on the back side of the substrate, wherein the RFID label further comprises an integrated semiconductor circuit in the form of a miniature chip, electrical terminals of which being connected, on one side, to the first conductive surface and, on another side, to a conductive surface that is essentially at the same electrical potential as the first plate of the capacitor, thereby the miniature chip being driven by a voltage of the capacitor, and an additional element other than the article subsequently applied to a surface of the RFID label which changes the a resonant frequency of the resonant circuit.