Piezoelectric vibration device

Details Piezoelectric vibration device Piezoelectric vibration device

1998-07-16

2000-07-11

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310366, 310367, H01L 4108

Patent

active

060877588

ABSTRACT:
A piezoelectric vibration device is constructed to suppress interference between resonance sections and achieve a satisfactory resonance characteristic and sufficient mechanical strength. In the piezoelectric vibration device, a plurality of resonance sections are provided on a piezoelectric substrate and a slit is provided so as to extend from one side of the piezoelectric substrate toward a center thereof in order to suppress interference between the resonance sections. If the length of the slit is denoted as a, the gap width along the opposing direction of the first and second resonance electrodes in the resonance section as g, the distance from the center of the gap to the nearest side of the piezoelectric substrate and the sides of the slit as L.sub.1, and the external dimension of the piezoelectric substrate along one direction as L, then the expression L.sub.1 -g/2=b, b<a.ltoreq.(3/4)L is satisfied.

REFERENCES:
patent: 3697766 (1972-10-01), Ganter et al.
patent: 4196407 (1980-04-01), Masaie et al.
patent: 4564825 (1986-01-01), Takahashi et al.

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