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Method of making thermally stable, piezoelectric and proelectric polymeric substrates

  • US 5,909,905 A
  • Filed: 08/30/1996
  • Issued: 06/08/1999
  • Est. Priority Date: 09/07/1995
  • Status: Expired due to Fees
First Claim
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1. A process for preparing a thermally stable, piezoelectric and pyroelectric polymeric substrate, the process comprising:

  • a) providing a polymeric substrate having a softening temperature greater than about 100°

    C.;

    b) depositing a metal electrode material onto the polymeric substrate to form a metal electrode coated polymeric substrate;

    c) attaching a plurality of electrical leads to the metal electrode coated polymeric substrate;

    d) heating the metal electrode coated polymeric substrate in a low dielectric medium to about the softening temperature of the polymeric substrate;

    e) applying a voltage to the heated metal electrode coated polymeric substrate to induce polarization wherein the voltage is less than the voltage wherein dielectric breakdown occurs in the metal electrode coated polymeric substrate; and

    f) cooling the polarized metal electrode coated polymeric substrate to a temperature below the softening temperature of the polymer while maintaining a constant voltage.

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