Resonator element, resonator, oscillator, electronic device, and moving object
AssigneeSeiko Epson Corporation
InventorAkinori Yamada
Life of this patent
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Abstract
A resonator element is provided. A base portion includes a first base portion, a second base portion, and a connecting portion. The base portion includes a width-decreasing portion that is provided at an end of the connecting portion on the first base portion side and that has a width along an X-axis direction which continuously decreases toward the second base portion. An outer edge of the width-decreasing portion and an outer edge of the connecting portion form a continuous line that does not include a corner portion, when seen in a plan view. When an angle between a tangent of a portion of the curved line on the first base portion side and a segment parallel to the X-axis direction is set to θ, a relation of 0°<θ<90° is satisfied.
Claims21
A resonator element comprising:
- a base portion;
- and
- a pair of vibrating arms that extend from one end of the base portion along a first direction and are arranged in a line extending in a second direction perpendicular to the first direction,
- the base portion including,
- a first base portion that includes the one end,
- a second base portion that is provided on an opposite side of the first base portion from the one end side when seen in a plan view, and
- a connecting portion that connects the first base portion and the second base portion,
- the base portion being provided with a notch portion that is aligned with the connecting portion along the second direction, the notch portion having a width which increases along the first direction,
- in a principal surface of the base portion, the notch portion is provided with (i) one end-side outer edge on the one end-side, and (ii) the other end-side outer edge on the other end side, which is the opposite side to the one end-side, and the one end-side outer edge and the other end-side outer edge are asymmetrical to each other,
- the one end-side outer edge is a line, which includes a straight line and a curved line and does not include a corner portion, and
- when an angle between the straight line of the one end-side of the outer edge and a virtual line passing through the notch portion along the second direction is θ, a relation of 0°<θ<90° is satisfied.
A resonator element comprising:
- a base portion including a first base portion and a second base portion;
- a pair of vibrating arms that extend from one end of the base portion along a first direction and are arranged in a line extending in a second direction perpendicular to the first direction;
- and
- a connecting portion that connects the first base portion and the second base portion, the connecting portion being a notch portion having a varying width that increases as the notch portion approaches the base portion, and the connecting portion having an outer edge having no corners, and
- an outer edge of the notch portion including one end-side outer edge and the other end-side outer edge, the one end-side outer edge including an inclined portion and a curved portion, the one end-side outer edge does not include a corner portion, the inclined portion forming an acute angle with respect to the second direction, and the one end-side outer edge and the other end-side outer edge are asymmetrical to each other.
Dependencies are inferred from the claim text.