Patent ID: 7205899

Claim:
Transponder label for application on an electrical conductive substrate, which has the following: a resonance circuit having a coil element and a condenser element with a resonance frequency in a radio wave range and a flexible film with at least one layer, said film being thinner than 1 mm and having a portion of magnetically soft material which effects an increase of a permeability rate of the film to be equal to or greater than 10, wherein the film extends over at least a majority of the surface of the transponder label taken up by the coil element and which is located upon application of the transponder label between the coil element and the substrate, wherein the thickness of the film layers and the permeability rate of the film are coordinated to one another and on the substrate determined for application, such that upon application of the transponder label on the substrate, a sufficient magnetic shielding against the substrate is permitted, and the resonance frequency lies in a predetermined target frequency range and wherein the resonance circuit has a resonance performance, which lies over a fixed value before the application of the transponder label on the conductive substrate, which, however, is not exceeded in the operation-ready state on the substrate.