Patent ID: 8125341
Filing Date: 2012-02-28
Classification: G08B,H05K

Abstract:
1. A resonant tag resonating with a radio wave at a predetermined frequency, comprising: a dielectric film; a first circuit comprising a first metal foil including a coil portion and a plate portion, which comprises a first plate of a capacitor, formed on one side of said dielectric film; a second circuit made of a second metal foil including a plate section which comprises a second plate of said capacitor, formed on the other side of said dielectric film; wherein said both circuits comprise an LC circuit by being electrically connected; and wherein a portion of at least one of said capacitor plates is indented into said dielectric film such that said capacitor plates are closer together at said indentation than at the remaining portions of said capacitor plates, said indentation creating means for deactivating said resonant tag circuit in response to an electromagnetic field of sufficient energy to destroy the resonant properties of said circuit; and wherein said indentation is physically reinforced by a reinforcement material in the area of said indentation, said reinforcement material having a perimeter and wherein said reinforcement material is stress relieved by a gap in at least one of said metal foils along a portion of said perimeter.