| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric vibration device having high junction reliability by suppressing a generated crack at solder mounting on an external substrate etc.SOLUTION: The outer bottom face 200 of a crystal vibrator base 2 is substantially rectangular in a plan view, and a pair of external terminals 5, 5 is disposed closely and symmetrically relative to the center point O of the outer bottom face. A pair of extraction electrodes 6A, 6B is formed in point symmetry from a set of corners C1, C6, located in point symmetry relative to the center point O among the corners of the rectangular external terminals 5 in the plan view, toward a set of short sides W1, W2 of the base bottom face closest to each of the corners C1, C6. |
