| 摘要 |
PT--78908 A The tag circuit has at least one resonant frequency and is sensed and electronically deactiveted to destroy the resonant characteristics at the detection frequency. The circuit is electronically deactivated by a breakdown mechanism operative to cause vaporisation of a conductive area or short-circuiting of capacitor plates. - A deactivator provides electromagnetic energy at a resonant frequency of the circuit of sufficient energy to cause electrical breakdown and deactivation of the circuit.
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