Patent ID: 8736152

Claim:
A piezoelectric vibrating piece comprising: a base having a substantially rectangular shape, an upper main surface and a lower main surface; a pair of vibrating arms having the upper and lower main surfaces and extending in a Y-axis direction from the base, the pair including first and second vibrating arms; a respective vibrating-arm groove on each main surface of each vibrating arm, each vibrating-arm groove extending in the Y-axis direction onto the base; at least one respective step-side surface situated on each main surface of the base outboard, in an X-axis direction, of each vibrating-arm groove, each step-side surface being parallel with the respective vibrating-arm groove; a first electrode situated on the vibrating-arm grooves of the first vibrating arm and on the at least one respective step-side surface on each main surface; and a second electrode situated on the vibrating-arm grooves of the second vibrating arm and on the at least one respective step-side surface on each main surface; wherein the first and second electrodes are energized with different electrical polarities; the step-side surfaces are defined by respective side surfaces of respective through-holes extending depthwise, in a Z-axis direction, through the base from the upper main surface to the lower main surface; and each at least one side-step surface comprises at least one side surface of the respective notch.