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Contactless electronic memory card

  • US 6,435,415 B1
  • Filed: 06/07/1999
  • Issued: 08/20/2002
  • Est. Priority Date: 12/11/1996
  • Status: Expired due to Fees
First Claim
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1. A method of making an electronic memory card that, without electrical contact, exchanges information with a reader device, said electronic memory card including a coupling antenna for coupling with said reader device, and a semiconductor die connected to said antenna, the method comprising the steps of:

  • a) forming on a support sheet of plastics material, a coupling antenna provided with two electrical connection terminals;

    b) mounting, on said electrical connection terminals, a semiconductor die having protruding contacts engaging said terminals;

    c) placing, on the support sheet, an intermediate sheet, made of a uniform layer of the same plastics material and without a reinforcer being included in such layer, that covers said semiconductor die, the intermediate sheet being non-perforated and covering the semiconductor die and having a surface area with no cavity therein sized to receive the semiconductor die, said intermediate sheet having a melting point that is lower than the melting point of the support sheet;

    d) placing an outer sheet made of plastics material at least on said intermediate sheet; and

    e) laminating the support sheet and outer sheet together by applying heat and pressure, and embedding the semiconductor die is embedded within a cavity formed in said surface area of the intermediate sheet as a result of the laminating step.

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