| 摘要 |
PROBLEM TO BE SOLVED: To provide a mesa piezoelectric vibration piece which stably vibrates by suppressing influences of bending vibration while preventing vibration of a vibrating part from being disturbed by outflow of a fixed member, and a piezoelectric device with the mesa piezoelectric vibration piece.SOLUTION: A crystal vibration piece 10 comprises: a vibrating part 12 including exciting electrodes 16, 18; and thin parts 13, 14 in both ends of the vibrating part 12. When a dimension from an end 12b of the vibrating part 12 closer to one thin part 13 including a fixed part 11 to ends 16b, 18b of the exciting electrodes 16, 18 closer to the one thin part 13 is defined as T1, a dimension from an end 12c of the vibrating part 12 closer to the other thin part 14 to ends 16c, 18c of the exciting electrodes 16, 18 closer to the other thin part 14 is defined as T2 and a wavelength of bending vibration generated in the crystal vibration piece 10 is defined as λ, a relational expression of T1-T2=λ×m (herein T2=(2n-1)λ/2, and (m) and (n) are natural numbers) is approximately satisfied. |
