RESONANT FREQUENCY TAG AND METHOD FOR CONTROLLING TAG FREQUENCY

摘要

A method of making a resonant frequency tag which resonates at a predetermin ed frequency comprises the steps of forming a first conductive pattern comprisi ng an inductive element and a first land, the first land having a first end connected to one end of the inductive element, and a second end spaced a predetermined distan ce from the first end; separately forming a second conductive pattern comprising a second land and a link element, the second land having a predetermined width; placi ng the second conductive pattern proximate to the first conductive pattern at a fir st predetermined location so that the second land overlies at least a portion o f the first land with a dielectric therebetween to establish the plates of a capacitive element with a first predetermined capacitance which with the inductive element forms a resonant circuit; measuring the resonant frequency of the resonant circuit and comparing the measured frequency with the predetermined frequency; if the resonant frequen cy does not match the predetermined frequency within a selected tolerance, moving th e second conductive pattern so that the second land moves along the length of the first land to thereby change the capacitance of the capacitive element; repeating the last two steps until a match occurs; and securing the second conductive pattern t o the first conductive pattern.