Tamper-Proof RFID Label

Abstract

Described are RFID structures and methods for forming RFID structures. An RFID structure includes an antenna assembly comprising a dipole antenna track and at least two contact pads, the dipole antenna track defining one or more gap regions that separate adjacent or adjoining segments of the dipole antenna track. The RFID structure also includes an antenna substrate supporting the antenna assembly, the antenna substrate including one or more perforations positioned in the one or more gap regions.

What is claimed is: 
     
         1 . A RFID structure comprising:
 an antenna assembly comprising a dipole antenna track and at least two contact pads, the dipole antenna track defining one or more gap regions that separate adjacent or adjoining segments of the dipole antenna track; and   an antenna substrate supporting the antenna assembly, the antenna substrate including one or more perforations positioned in the one or more gap regions.   
     
     
         2 . The RFID structure of  claim 1 , wherein the one or more perforations comprise one or more cuts, one or more holes, one or more slits, or any combination thereof. 
     
     
         3 . The RFID structure of  claim 1 , wherein the dipole antenna track comprises at least two adjoining antenna segments that define lines having an angle less than 15 degrees, at least one of the one or more gap regions positioned between the two adjoining antenna segments. 
     
     
         4 . The RFID structure of  claim 3 , wherein the one or more gap regions separate the two adjoining antenna segments by between 0.16 mm and 1.0 mm. 
     
     
         5 . The RFID structure of  claim 1 , wherein the antenna substrate comprises a carrier foil including polyethylene terephthalate (PET), polyethylene terephthalate glycol-modified (PET-G), polypropylene (PP), polyethylene (PE), polyimide (PI), polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), liquid crystal polymer (LCP), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), glass fiber, epoxy, bismaleimide triazine (BT), polycarbonate (PC) or any combination thereof. 
     
     
         6 . The RFID structure of  claim 1 , further comprising:
 an adhesive layer on a surface of the antenna substrate opposite the antenna assembly;   an integrated circuit coupled to the at least two contact pads; and   a protective layer covering the antenna assembly and the integrated circuit.   
     
     
         7 . The RFID structure of  claim 1 , wherein the RFID structure comprises a RFID label. 
     
     
         8 . A method of manufacturing a RFID structure, the method comprising:
 providing an antenna substrate;   providing an antenna assembly on the antenna substrate, the antenna assembly comprising a dipole antenna track and at least two contact pads, the dipole antenna track defining one or more gap regions that separate adjacent or adjoining segments of the dipole antenna track; and   forming one or more perforations positioned in the one or more gap regions.   
     
     
         9 . The method of  claim 8 , wherein the one or more perforations comprise one or more cuts, one or more holes, one or more slits, or any combination thereof. 
     
     
         10 . The method of  claim 8 , wherein forming the one or more perforations comprises punching the antenna substrate using a punch-press, heating the antenna substrate using a laser, or both. 
     
     
         11 . The method of  claim 8 , wherein the dipole antenna track comprises at least two adjoining antenna segments that define lines having an angle less than 15 degrees, at least one of the one or more gap regions positioned between the two adjoining antenna segments. 
     
     
         12 . The method of  claim 8 , wherein the one or more gap regions separate the two adjoining antenna segments by between 0.1 mm and 1.0 mm. 
     
     
         13 . The method of  claim 8 , wherein the antenna substrate comprises a carrier foil including polyethylene terephthalate (PET), polyethylene terephthalate glycol-modified (PET-G), polypropylene (PP), polyethylene (PE), polyimide (PI), polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), liquid crystal polymer (LCP), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), glass fiber, epoxy, bismaleimide triazine (BT), polycarbonate (PC) or any combination thereof. 
     
     
         14 . The method of  claim 8 , further comprising:
 applying an adhesive layer on a surface of the antenna substrate opposite the antenna assembly;   coupling an integrated circuit to the at least two contact pads; and   applying a protective layer covering the antenna assembly and the integrated circuit.   
     
     
         15 . The method of  claim 8 , wherein the RFID structure comprises a RFID label.