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Tamper resistant RFID tags and associated methods

  • US 7,855,649 B2
  • Filed: 10/22/2008
  • Issued: 12/21/2010
  • Est. Priority Date: 11/21/2007
  • Status: Active Grant
First Claim
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1. An assembly having a tamper resistant RFID tag, comprising:

  • an object having a surface;

    a housing having a bottom surface, the housing further comprising a cavity within the bottom surface and one or more structures protruding from an inner wall of the cavity;

    an RFID transponder positioned within the cavity;

    a potting element within the cavity, the potting element engaging the RFID transponder and the one or more structures, the potting element comprising a material that is weaker than the housing; and

    an adhesive positioned between the bottom surface of the housing and the surface of the object to adhere the housing and the potting element to the surface of the object, the adhesive comprising a material that bonds more strongly to the surface of the object than to the housing, bonds more strongly to the surface of the object than to the potting element, and bonds more strongly to the potting element than the housing so that the potting element will tend to break rendering the RFID transponder inoperable if the housing is pried off the object.

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