Resonator element, resonator, oscillator, electronic device and mobile object

摘要

A resonator element includes a quartz crystal resonator blank provided with a base portion, vibrating arms extending from one end side of the base portion, a connecting portion which is disposed on the other end side of the base portion, and a coupling portion, located between the base portion and the connecting portion, which couples the base portion to the connecting portion. When a thickness of the quartz crystal resonator blank is set to T, a width of the base portion is set to W1, and a width of the coupling portion is set to W2, a relation of 110 μm≦T≦210 μm is satisfied, and a relation of 0.469≦W2/W1≦0.871 is satisfied.

主权项

1. A resonator element comprising a resonator blank which is provided with:
a base portion; a vibrating arm that extends out in a first direction from one end side of the base portion, when seen in plan view; a connecting portion which is disposed on the other end side of the base portion, when seen in plan view; and a coupling portion, located between the base portion and the connecting portion when seen in plan view, which couples the base portion to the connecting portion, wherein when a thickness of the resonator blank is set to T, a width of the base portion along a second direction intersecting the first direction is set to W1, and a width of the coupling portion along the second direction is set to W2, a relation of 110 μm≦T≦210 μm is satisfied, a relation of 0.469≦W2/W1≦0.871 is satisfied, the vibrating arm includes:
a weight portion; andan arm which is disposed between the base portion and the weight portion when seen in plan view, andthe weight portion having a width along the second direction being 2.8 times or more than a width of the arm.