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Thin radio frequency transponder with leadframe antenna structure

  • US 5,786,626 A
  • Filed: 03/25/1996
  • Issued: 07/28/1998
  • Est. Priority Date: 03/25/1996
  • Status: Expired due to Term
First Claim
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1. A radio frequency transponder comprising:

  • a. a circuit chip having a surface with one or more connectors; and

    b. a self-supporting leadframe antenna, said self-supporting leadframe antenna being an electrically conductive self-supporting foil of a material having a Youngs'"'"'s Modulus on the order of 12×

    1011 dynes per square centimeter of greater, said self-supporting foil having no supporting substrate and having two or more ends, one or more of the ends being electrically attached to one of the connectors on the circuit chip, the self-supporting foil itself forming an antenna for the radio frequency circuit.

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