Surveillance devices with multiple capacitors

G - Physics – 08 – B

Patent

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Details

G08B 13/24 (2006.01)

Patent

CA 2725460

The present invention relates to surveillance and/or identification devices having capacitors connected in parallel or in series, and methods of making and using such devices. Devices with capacitors connected in parallel, where one capacitor is fabricated with a relatively thick capacitor dielectric and another is fabricated with a relatively thin capacitor dielectric achieve both a high-precision capacitance and a low breakdown voltage for relatively easy surveillance tag deactivation. Devices with capacitors connected in series result in increased lateral dimensions of a small capacitor. This makes the capacitor easier to fabricate using techniques that may have relatively limited resolution capabilities.

La présente invention concerne des dispositifs de surveillance et/ou didentification comprenant des condensateurs connectés en parallèle et en série, et des procédés de fabrication et dutilisation de tels dispositifs. Des dispositifs comprenant des condensateurs connectés en parallèle, où un condensateur est fabriqué avec un milieu diélectrique de condensateur relativement épais et un autre condensateur est fabriqué avec un milieu diélectrique de condensateur relativement fin aboutissent à la fois à une capacité de précision élevée et à une faible tension disruptive pour une désactivation détiquette de surveillance relativement facile. Des dispositifs comprenant des condensateurs connectés en série débouchent sur des dimensions latérales accrues dun petit condensateur. Cela rend le condensateur plus facile à fabriquer à laide de techniques qui peuvent avoir des capacités de résolution relativement limitées.

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