Patent ID: 7501745
Filing Date: 2009-03-10
Classification: H01L,H02N

Abstract:
1. A piezoelectric vibrator comprising: a piezoelectric element including: a first piezoelectric element layer having a bisected top electrode formed thereon; a second piezoelectric element provided under the first piezoelectric element layer and having an internal ground electrode formed thereon; and a third piezoelectric element provided under the second piezoelectric element layer, the third piezoelectric element having an internal bisected electrode symmetrical with the top electrode with respect to a stack plane, and a bottom electrode formed in a plane opposite to the plane where the internal electrode is formed; a side electrode including: first and second side electrodes for electrically connecting electrode patterns formed in a diagonal direction among the electrode patterns formed in the first and third piezoelectric element layers of the piezoelectric element; and a third side electrode for electrically connecting the internal ground electrode of the second piezoelectric element layer to the bottom electrode of the third piezoelectric element layer; and a power transmission member formed in one side of the piezoelectric element to transmit vibration generated from the piezoelectric element to the outside.