Piezoelectric vibration device

Piezoelectric vibration device

  • CN 1,170,324 C
  • Filed: 06/26/1998
  • Issued: 10/06/2004
  • Est. Priority Date: 07/17/1997
  • Status: Active Grant
First Claim
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1. piezoelectric vibrating device is characterized in that comprising:

  • Piezoelectric substrate with top major surface and bottom major surface;

    At least two resonance portion, described resonance portion comprises on the described top major surface that is arranged on described piezoelectric substrate, first and second resonance electrodes in the gap that is separated by, and is arranged on the described bottom major surface of described piezoelectric substrate and by described piezoelectric substrate and the relative public electrode of described first and second resonance electrodes;

    Be arranged on the slit between the described resonance portion, extend from a side direction center of described piezoelectric substrate in described slit;

    Extend along the direction vertical with the bearing of trend in described slit in described gap between wherein said first and second resonance electrodes;

    AndSatisfy L 1-g/2=b and b<

    a≤

    (3/4) L, wherein, a is the length in described slit, g is wide along the seam of their directions in opposite directions between first and second resonance electrodes, L 1Be from the center in described gap to its be provided with described slit the described side of piezoelectric substrate and with the distance of described side opposite side in opposite directions short distance, and L is the external dimensions of piezoelectric substrate along the bearing of trend in described slit.

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