Patent ID: 6398350
Filing Date: 2002-06-04
Classification: B41J,H01L

Abstract:
A piezoelectric vibrator unit comprising a plurality of piezoelectric vibrators, each having at least in part, a laminate structure including first and second internal electrodes laminated alternately with a layer of piezoelectric material interposed between adjacent pairs of the first and second internal electrodes to define an active region in a free end part, a first external electrode electrically conducted to the first internal electrodes and a second external electrode electrically conducted to the second internal electrodes, wherein a potential difference is given to the piezoelectric material in the active region through the first and second external electrodes to activate the piezoelectric material, thereby displacing the free end part, wherein:a partial mass adjusting portion including a partial recess and/or a partial projection is provided to an outer surface of the piezoelectric vibrator in the free end part.