| 摘要 |
A resonator element has a piezoelectric substrate including a vibration section and a thick section having a thickness which is thicker than that of the vibration section, and a pair of excitation electrodes provided on a surface and aback surface of the vibration section. In addition, the thick section has a second thick section provided along a second outer edge of the vibration section. The second thick section has an outer edge section intersecting with both axes of an X axis and a Z′ axis in an end portion opposite to the fixing section in a plan view of the resonator element. |
