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Integrated circuit device having input/output electrostatic discharge protection cell equipped with electrostatic discharge protection element and power clamp

  • US 20080042206A1
  • Filed: 08/30/2007
  • Published: 02/21/2008
  • Est. Priority Date: 08/27/2003
  • Status: Active Grant
First Claim
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1. An integrated circuit device having an I/O ESD protection cell, wherein the I/O ESD protection cell comprises:

  • a power supply voltage (VDD) ESD protection element formed within a second conductivity type well in a first conductivity type substrate and comprising a first conductivity type active region connected to an I/O pad and a second conductivity type active region connected to a VDD line;

    a power clamp element formed within the second conductivity type well in the first conductivity type substrate and comprising the second conductivity type active region connected to the VDD line and the first conductivity type active region connected to a ground voltage (VSS) line; and

    a VSS ESD protection element formed within a first conductivity type well in the first conductivity type substrate and comprising the first conductivity type active region connected to the VSS line and the second conductivity type active region connected to the I/O pad.

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