| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration piece capable of obtaining a high Q value.SOLUTION: A vibration piece 100 is provided with a first groove 35 on the first principal surface 31 side in the longitudinal direction of vibration arms 30a, 30b, and provided with a second groove 36 on the second principal surface 32 side in the longitudinal direction. Assuming the depth of the first and second grooves 35, 36 is T, the thickness of the vibration arms 30a, 30b between the first and second principal surfaces 31, 32 is T, η=2×T/T, the first width on the first principal surface 31 and the third width on the second principal surface 32 are first surface width, the first width on the first principal surface 31 and the fourth width on the second principal surface 32 are second surface width, and at least one of the first surface width and second surface width is W, following relations are satisfied; 0.75≤η<1.00, and λ×W≤W≤λ×W.SELECTED DRAWING: Figure 3 |
