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Guard ring having electrically isolated lightening bars

  • US 6,927,345 B2
  • Filed: 05/16/2002
  • Issued: 08/09/2005
  • Est. Priority Date: 05/16/2002
  • Status: Active Grant
First Claim
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1. A guard ring for electrostatic discharge (ESD) protection comprising:

  • a substrate;

    a first ring on the substrate having a plurality of electrically connected lightning bars, each bar being substantially rectangular in shape, the electrically connected lightning bars defining a plurality of gaps, each gap between two immediately adjacent electrically connected lightning bars; and

    , a second ring on the substrate, concentric to the first ring, and having a plurality of lightning bars electrically isolated from one another, all of the lightning bars of the second ring each at least substantially situated within one of the gaps defined by the electrically connected lightning bars of the first ring.

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