Tuning fork quartz crystal resonator including concave of continous curved surface on base

摘要

A tuning fork quartz crystal resonator includes a base, a first resonating arm, and a second resonating arm. The base has a generally planar fifth main surface and a generally planar sixth main surface opposite to each other, and has a fifth side surface and a sixth side surface opposite to each other. The first resonating arm is connecting to one side of the base. The second resonating arm is connecting to the same side of the base. A concave of continuous curved surface is formed one each on the fifth side surface and the sixth side surface of the base respectively.