Resonator component, resonator device, and method of manufacturing resonator component

1 . A resonator component comprising:

a resonator element which has a rectangular shape having a longitudinal direction set to a first direction and a width direction set to a second direction perpendicular to the first direction in a plan view, which is made of a piezoelectric material, and which has a first principal surface, a second principal surface, a first side surface, and a second side surface, the first and second principal surfaces being outwardly opposite to each other along a third direction perpendicular to the first and second directions, the first and second side surfaces being outwardly opposite to each other along the second direction, each of the first and second side surfaces coupling the first principal surface and the second principal surface to each other and extending along the first direction;

a first excitation electrode disposed on the first principal surface, the first excitation electrode having a first length along the first direction in the plan view;

a second excitation electrode disposed on the second principal surface;

a first mounting electrode electrically coupled to the first excitation electrode;

a second mounting electrode electrically coupled to the second excitation electrode;

a first side-surface electrode:

extending in the first direction on the first side surface;

having a second length along the first direction;

being disposed on an entirety of a height, along the third direction, of the first side surface within a range of the second length; and

being electrically coupled to the first mounting electrode; and

a second side-surface electrode:

extending in the first direction on the second side surface; and

being electrically coupled to the second mounting electrode,

wherein the second length is longer than the first length.

2 . The resonator component according to claim 1 , wherein

the first side-surface electrode is directly coupled to the first mounting electrode, and

the second side-surface electrode is directly coupled to the second mounting electrode.

3 . The resonator component according to claim 1 , wherein

the first side-surface electrode and the second side-surface electrode are not disposed at end portions of the first side surface and the second side surface, respectively.

4 . The resonator component according to claim 1 , wherein

the resonator element has a third side surface configured to couple the first side surface and the second side surface to each other,

the first side-surface electrode is continuously disposed from the first side surface to the third side surface, and

the second side-surface electrode is continuously disposed from the second side surface to the third side surface.

5 . The resonator component according to claim 1 , wherein

the first side-surface electrode is continuously disposed from the first side surface to the first principal surface and the second principal surface, and

the second side-surface electrode is continuously disposed from the second side surface to the first principal surface and the second principal surface.

6 . A resonator device comprising:

the resonator component according to claim 1 ; and

a container configured to house the resonator component, wherein

the first mounting electrode and the second mounting electrode are bonded to a mounting surface of the container.

7 . A resonator component comprising:

a resonator element which has a rectangular shape having a longitudinal direction set to a first direction and a width direction set to a second direction crossing the first direction in a plan view, which is made of a piezoelectric material, and which has a first principal surface, a second principal surface having an obverse-reverse relationship with the first principal surface, and a first side surface and a second side surface which are configured to couple the first principal surface and the second principal surface to each other, and extend in the first direction;

a first excitation electrode disposed on the first principal surface;

a second excitation electrode disposed on the second principal surface;

a first mounting electrode electrically coupled to the first excitation electrode;

a second mounting electrode electrically coupled to the second excitation electrode;

a first side-surface electrode which extends in the first direction on the first side surface, and is electrically coupled to the first mounting electrode; and

a second side-surface electrode which extends in the first direction on the second side surface, and is electrically coupled to the second mounting electrode,

wherein the resonator element has a third side surface configured to couple the first side surface and the second side surface to each other,

the first side-surface electrode is continuously disposed from the first side surface to the third side surface, and

the second side-surface electrode is continuously disposed from the second side surface to the third side surface.