Patent ID: 7915788
Filing Date: 2011-03-29
Classification: H01L,H02N

Abstract:
1. A piezoelectric vibrator comprising: a piezoelectric bar including a plurality of piezoelectric plates alternately stacked, the piezoelectric bar having a plurality of vibration sectors divided vertically and horizontally with respect to the direction in which the piezoelectric plates are stacked; an internal electrode pattern formed on upper or lower surfaces of the piezoelectric plates, the internal electrode pattern on each of the piezoelectric plates including two electrode terminals each disposed on each of surface regions of the piezoelectric plate, divided in a longitudinal direction thereof, the electrode terminal having an end extended to an outer periphery of the piezoelectric plate, and two jump terminals unconnected with the internal electrode pattern and formed respectively on the internal electrode pattern and corresponding to the two electrode terminals formed on a surface of an adjacent one of the piezoelectric plates, wherein the two jump terminals are disposed on a center of the surface of the piezoelectric plates facing each other, one of the electrode terminals being adjacent to one of the jump terminals, and the other of the electrode terminals surrounding the other jump terminal, an external electrode pattern formed on side surfaces of the piezoelectric plates, the external electrode pattern consisting of four side electrodes alternately connecting the electrode terminals and the corresponding jump terminals to power the vibration sectors, wherein each side electrode electrically connects the electrode terminals and the jump terminals arranged in a straight line and simultaneously powers pairs of the vibration sectors disposed diagonally from each other; and a power transmission member formed at a side of the piezoelectric bar to transmit the vibration generated at the vibration sectors to the outside, wherein an interface between the stacked piezoelectric plates is vertical to a direction of flexural motion generated from the piezoelectric vibrator.