| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic wave vibrator which assures stable vibration in the ultrasonic wave oscillation and can prevent sudden reduction in efficiency even if frequency of drive voltage changes. SOLUTION: The ultrasonic wave vibrator comprises a plate-type piezoelectric material 1 for generating ultrasonic wave through vibration and electrodes 2, 3 provided respectively at the upper and lower surfaces of the same piezoelectric material 1 permitting application of a voltage for driving this piezoelectric material 1. In this ultrasonic wave vibrator, at least one aperture 2A is provided on at least one electrode 2A. COPYRIGHT: (C)2007,JPO&INPIT
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