| 摘要 |
In a unit comprising a quartz crystal resonator, a case having a mounting portion, and a lid connected to the case, the quartz crystal resonator having a base portion, and first and second vibrational arms connected to the base portion, at least one groove being formed in at least one of opposite main surfaces of each of the first and second vibrational arms, at least one mounting arm being connected to the base portion having a length L1 less than 0.5 mm and extending in a common direction with at least one of the first and second vibrational arms, the at least one mounting arm being mounted on the mounting portion of the case.
|
