| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric vibrator including a structure capable of changing a plurality of characteristics of the piezoelectric vibrator including at least an electromechanical coupling coefficient even when adjusted separately from electrode thickness using a flexural vibration mode.SOLUTION: This piezoelectric vibrator 1 includes a vibration part flexurally vibrating in a normal direction of a principal surface by application of a frequency signal. The vibration part has a structure wherein a plurality of layers including an upper principal surface electrode 2, a piezoelectric substrate 3, a lower principal surface electrode 4 and a dielectric layer 5 are laminated in the principal surface normal direction. The upper principal surface electrode 2 is formed on the upper principal surface of the piezoelectric substrate 3. The lower principal surface electrode 4 is formed on the lower principal surface of the piezoelectric substrate 3. The dielectric layer 5 is laminated on the lower principal surface electrode 4. |
