Patent ID: 8018127

Claim:
A flexural resonator element, comprising: a base body; and a beam with a groove and a through-hole, the beam being extended in a Y direction from the base body and flexurally vibrating in an X direction orthogonal to the Y direction, the groove being formed on a surface of the beam perpendicular to a Z direction orthogonal to the X direction and the Y direction, the groove formed on the surface of the beam includes two grooves, each of the two grooves is formed on a different one of two surfaces of the beam perpendicular to the Z direction, each of the two grooves is formed adjacent to the other groove such that the grooves do not overlap in plan view, and the through-hole having a smaller width in the X direction than a width of an opening of the groove in the X direction and penetrating from an inner surface of the groove formed on the surface of the beam to a surface of the beam opposite to the surface of the beam having the groove.