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Piezoelectric element having thickness shear vibration and mobile communication device using the same

  • US 6,621,194 B1
  • Filed: 11/10/2000
  • Issued: 09/16/2003
  • Est. Priority Date: 11/15/1999
  • Status: Expired due to Fees
First Claim
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1. A piezoelectric element comprising:

  • a piezoelectric substrate having a shape of an elongated rectangular solid, and first and second exciting electrodes formed on a part of at least one principal plane selected from the group consisting of a first principal plane of the piezoelectric substrate and a second principal plane opposed to the first principal plane, wherein thickness shear vibration occurs, a vibration direction of the thickness shear vibration is nonparallel to a side wall extending in a longitudinal direction of the piezoelectric substrate, and a normal line of an edge in the longitudinal direction of the first exciting electrode and a normal line of an edge in the longitudinal direction of the second exciting electrode are parallel to each other, and are nonparallel to the side wall extending in the longitudinal direction of the piezoelectric substrate.

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