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IC card having a mica film for stable resonance frequency and enhanced antenna properties

  • US 20040124983A1
  • Filed: 12/17/2003
  • Published: 07/01/2004
  • Est. Priority Date: 07/29/1999
  • Status: Active Grant
First Claim
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1. An IC card, comprising:

  • a mica capacitor comprising a mica film, electrodes formed on both sides of said mica film, an antenna coil, and an IC chip;

    wherein;

    said mica film acts as a substrate on which said antenna coil and said IC chip are provided;

    a first capacitor terminal is connected to a first terminal of said IC chip and is linked to a first terminal of said antenna coil;

    a second capacitor terminal is connected to a second terminal of said IC chip; and

    a third capacitor terminal is connected to a second terminal of said antenna coil; and

    said IC chip is mounted on said mica film inside of said antenna coil, such that said IC chip does not overlay said antenna coil.

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