| 摘要 |
An AT-cut type crystal oscillation plate (2) provided with a first excitation electrode (211) formed on one main surface (2a), and a second excitation electrode (212) formed on another main surface (2b), wherein the crystal oscillation plate includes: a substantially rectangular shaped oscillation portion (21) which is caused to exhibit piezoelectric oscillation by a voltage being applied to the first excitation electrode (211) and the second excitation electrode (212); a holding portion (22) which projects out in the AT-cut Z'-axis direction from a corner portion (21a) of the oscillation portion (21); and an outer frame portion (23) which surrounds the outer periphery of the oscillation portion (21) and is held by the holding portion (22). |
