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Piezoelectric vibrator with internal electrodes

  • US 7,786,655 B2
  • Filed: 08/14/2008
  • Issued: 08/31/2010
  • Est. Priority Date: 09/27/2002
  • Status: Active Grant
First Claim
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1. A vibrator comprising:

  • a laminated element of at least two piezoelectric sheets;

    internal electrodes formed between the laminated piezoelectric sheets;

    external electrodes formed outside the laminated element;

    insulators formed on upper and lower portions of the laminated element, wherein a vibration groove is formed on a surface of the insulators, the surface being in contact with the laminated element, and wherein the internal electrodes are not connected to the external electrodes,a dielectric substrate, which functions as a capacitor with terminals, installed on the lower portion of the laminated element; and

    a protective cap for protecting elements installed on the upper portion of the laminated element.

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