Patent ID: 6919806
Filing Date: 2005-07-19
Classification: G08B

Abstract:
1. In a deactivation system for an electronic article surveillance tag having a plurality of layers and an equivalent resonant circuit containing an inductor and a capacitor, the apparatus comprising: a capacitor formed by a pair of conductive capacitor plates separated apart by a dielectric layer between said capacitors plates, said dielectric layer having at least one electrically weakened area as a characteristic of one or more materials forming at least a portion of said dielectric layer; an inductor connected to each of said pair of capacitor plates wherein an electromagnetic field of a pre-selected frequency at a first magnitude impinging upon the tag causes the equivalent resonant circuit to resonate and produce a detectable response from the tag; and, wherein said electromagnetic field at a second magnitude higher than said first magnitude impinging upon the tag causes a conductive path through said electrically weakened area electrically connecting said pair of capacitor plates together.