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Substrate damage detection mechanism using RFID tag

  • US 7,663,491 B2
  • Filed: 08/30/2006
  • Issued: 02/16/2010
  • Est. Priority Date: 08/30/2006
  • Status: Expired due to Fees
First Claim
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1. A substrate damage detection mechanism using RFID tags, comprising:

  • a substrate made of glass material;

    at least one RFID tag with a RFID chip, a RFID transmitter and at least one data input/output port; and

    a defogging circuit arranged to cover the substrate and provided with a first end that is electrically connected to a ground potential and a second end that is electrically connected to the data input/output port of the RFID tag and a potential with a predetermined direct current;

    wherein the RFID chip generates a conductive code when the defogging circuit is originally conducting and generates an open-circuit code when the defogging circuit becomes open circuit resulting from the damage of the substrate in which both the conductive code and the open-circuit code are transmitted by the RFID transmitter and received by a RFID reader to determine the damage of the substrate.

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