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Apparatus for providing RFI/EMI isolation between adjacent circuit areas on a single circuit board

  • US 5,252,782 A
  • Filed: 06/29/1992
  • Issued: 10/12/1993
  • Est. Priority Date: 06/29/1992
  • Status: Expired due to Term
First Claim
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1. Apparatus for isolating a first circuit area from an adjacent second circuit area on a circuit board having a top surface and a bottom surface, comprising:

  • a first ground plane substantially covering the top surface surrounding the first circuit area;

    a second ground plane substantially covering the bottom surface opposite from and aligned with the first ground plane surrounding the first circuit area;

    means for electrically connecting the first ground plane to the second ground plane, the electrically connected first and second ground planes inhibiting the propagation of interference energy through the circuit board between the first and second circuit areas; and

    a conductive clam shell shield for inhibiting airborne propagation of interference energy between the first and second circuit areas, the shield mounted above and below the circuit board to enclose the first circuit area.

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