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Static event detection/protection device

  • US 6,583,612 B2
  • Filed: 01/05/2001
  • Issued: 06/24/2003
  • Est. Priority Date: 09/18/1995
  • Status: Expired due to Fees
First Claim
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1. An electrostatic discharge event detector for detecting a magnitude of an electrostatic discharge, comprising:

  • a substrate;

    at least one conductor patterned from a metal layer deposited on the substrate, the conductor acting as an antenna for receiving a voltage produced by an electro-static discharge, the received voltage inducing a current to flow through the conductor sufficient to generate a magnetic field around the conductor;

    a first pair of magneto-optic elements having a first magnetic state formed spaced apart by a first distance on the substrate such that the conductor is located equidistant between the magneto-optic elements;

    a second pair of magneto-optic elements having a first magnetic state formed spaced apart by a second distance that is larger than the first distance on the substrate such that the conductor is located equidistant between the magneto-optic elements;

    wherein the first and second pairs of magneto-optic elements are capable of switching from the first magnetic state to a second magnetic in response to a magnetic field having a field strength that exceeds a predetermined field strength at the location of the magneto-optic elements; and

    wherein the magnitude of the electrostatic discharge may be determined from the magnetic state of the magneto-optic elements.

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