Planar conductive device that forms a coil for an rfid tag when folded

Abstract

A planar conductor device and RFID chip are folded to create a coil to form an RFID tag. The result is the formation of a solenoid coil, not planar, which allows the device to be placed against metal. Specifically, the planar structure is folded into a concertina fold. After folding, a spiral conductor is formed in the Z direction, forming a coil with the RFID chip connected to both ends. This structure operates as a resonant RFID tag.

What is claimed is: 
     
         1 . A device forming a radio-frequency identification (RFID) tag comprising:
 a planar conductor component; and   an RFID chip secured to the conductor component; and   wherein the planar conductor component is folded in a cross-web direction to form an RFID tag.   
     
     
         2 . The device of  claim 1 , wherein the planar conductor component is folded into a concertina fold. 
     
     
         3 . The device of  claim 2 , wherein the folded planar conductor component forms a solenoid coil. 
     
     
         4 . The device of  claim 1 , wherein the planar conductor component comprises a meandering conductive trace. 
     
     
         5 . The device of  claim 4 , wherein the meandering conductive trace is formed by at least one of etching, laser cutting, or die cutting. 
     
     
         6 . The device of  claim 1 , wherein the planar conductor component is comprised of paper or aluminum foil.