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Piezoelectric vibrator filter using the same and method for adjusting piezoelectric vibrator

  • US 20050012569A1
  • Filed: 10/24/2003
  • Published: 01/20/2005
  • Est. Priority Date: 10/28/2002
  • Status: Active Grant
First Claim
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1. A piezoelectric vibrator comprising:

  • a piezoelectric plate, whose polarization points in a direction of a thickness, having a first face and a second face;

    a first electrode for covering the first face;

    a second electrode for covering the second face;

    a first dielectric film for covering the first electrode; and

    a second dielectric film for covering the second electrode, wherein the piezoelectric plate employs thickness longitudinal vibration as principal vibration, wherein the first dielectric film and the second dielectric film have substantially the same thickness and area each other.

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