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Apparatus and method for protecting fingerprint sensing circuitry from electrostatic discharge

  • US 8,107,212 B2
  • Filed: 04/30/2007
  • Issued: 01/31/2012
  • Est. Priority Date: 04/30/2007
  • Status: Active Grant
First Claim
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1. A fingerprint sensor comprising:

  • a non-conductive substrate having a sensing surface on a sensing surface side of the non-conductive substrate, across which a user swipes a finger in order to sense a fingerprint;

    a fingerprint sensing circuit having fingerprint sensing components formed on a circuit component surface on a circuit component side of the non-conductive substrate, opposing the sensing surface on the sensing surface side of the non-conductive substrate, wherein the fingerprint sensor senses a fingerprint when the finger is swiped across the sensing surface; and

    an electrostatic discharge conductor formed on the non-conductive substrate intermediate an area of electrostatic charge formed on the sensing surface and the fingerprint sensing circuit components formed on the circuit component surface.

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