Resonator device

A resonator device, comprising:

• a resonator element that includes an excitation electrode, and that has a first surface on which a first mount electrode and a second mount electrode electrically coupled to the excitation electrode are disposed, and a second surface in a front-back relationship with the first surface;
• a base that has a third surface which faces the first surface of the resonator element and on which a first base electrode and a second base electrode are disposed;
• a lid that has a fourth surface which faces the second surface of the resonator element, and that is bonded to the base so as to accommodate the resonator element;
• a first metal bump by which the first mount electrode and the first base electrode are bonded and electrically coupled;
• a second metal bump by which the second mount electrode and the second base electrode are bonded and electrically coupled;
• and
• a bonding member by which the second surface and the fourth surface are bonded, wherein
• a loss tangent of the bonding member at a room temperature is larger than a loss tangent of the first metal bump and the second metal bump at the room temperature.