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Form-in-place EMI gaskets

  • US 6,303,180 B1
  • Filed: 09/18/1997
  • Issued: 10/16/2001
  • Est. Priority Date: 09/10/1993
  • Status: Expired due to Term
First Claim
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1. A method of making a form-in-place elastomeric EMI shielding gasket, comprising:

  • extruding onto a substrate to be gasketed a free-form polymeric thermal additional cure system having a viscosity of from about 100,000 to about 10,000,000 centipoise, and including a resin selected from the group consisting of silicone, siloxane, thermoplastic elastomers and mixtures thereof and an electrically-conductive filler; and

    curing the system under atmospheric pressure, thereby forming a gasket having bulk resistivity of less than about 0.050 ohm cm, a force/deflection value of from about 35 N/m to about 267 N/m, a shore A hardness of at most about 90 and a closure force of at most about 5 pounds/linear inch.

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