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Electrostatic discharge circuit and method of dissipating an electrostatic current

  • US 7,888,739 B2
  • Filed: 08/11/2005
  • Issued: 02/15/2011
  • Est. Priority Date: 02/07/2005
  • Status: Expired due to Fees
First Claim
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1. An electrostatic discharge circuit comprising:

  • a first well of a first conductivity type, connected to a first pad;

    a second well of the first conductivity type, connected to a second pad;

    a third well of a second conductivity type, connected to the first pad; and

    a switching pathway of the first conductivity type in the third well, the switching pathway connecting the first well and the second well,wherein voltages applied to the first pad and the second pad are different from each other, andthe discharge circuit is configured to alternate a discharge of a current of an electrostatic discharge (ESD) event between a plurality of paths a plurality of times, the plurality of paths including the switching pathway.

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