An electronically detectable resonance label, in particular an RFID label, includes a substrate made of plastic foil and conductive surfaces on the front and rear of the substrate. Some of the conductive surfaces form a capacitor in a mutual area of overlap. The label includes a first capacitor plate...http://www.google.com.hk/patents/US6624362?utm_source=gb-gplus-share專利 US6624362 - Electronically detectable resonance label, in particular RFID label
