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Dielectric material and method of making the dielectric material

  • US 4,518,737 A
  • Filed: 02/17/1982
  • Issued: 05/21/1985
  • Est. Priority Date: 12/26/1978
  • Status: Expired due to Fees
First Claim
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1. A non-porous dielectric sheet material wherein the dielectric constant is substantially isotropic, said sheet material comprising a fluorinated polymer binding selected from the group consisting of polytetrafluoroethylene, fluorinated poly (ethene-co-propene), polyolefins, polyacrylates, polystyrenes and poly (vinylidene fluoride), a ceramic filler in particulate form having an average particle diameter of between about 1 to 20 micrometers and non-conductive inorganic microfibers having an average diameter less than 2 micrometers selected from the group consisting of glass, aluminum silicate, potassium titanate, quartz and zirconia, the ratio of the weight of fibers to total non-filler being in the range of 0.07 to 0.20 and the filler comprising between 10% and 75% by weight of the dielectric material.

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