A resonator device includes a base substrate including a principal surface, a side surface, and an inclined surface that couples the principal surface to the side surface and that is inclined with respect to the principal surface and the side surface, a resonator element arranged on the principal surface of the base substrate, and a lid that is bonded to the principal surface of the base substrate and accommodates the resonator element between the lid and the base substrate. A bonding area in which the base substrate and the lid are bonded is positioned inside an outer edge of the principal surface.

A resonator device includes a quartz crystal substrate, a resonator element including a first excitation electrode arranged on a first surface of the quartz crystal substrate, a second excitation electrode arranged on a second surface of the quartz crystal substrate in opposition to the first excitation electrode, and first and second pad electrodes that are arranged on the first surface and are coupled to the first and second excitation electrodes, a base including a substrate and first and second interconnects arranged on the substrate, a first bonding member bonding the first pad electrode to the first interconnect, and a second bonding member bonding the second pad electrode to the second interconnect. The first and second bonding members are arranged such that a first imaginary line that passes through a centroid of the resonator element and is parallel to an X axis is interposed between the first and second bonding members. An angle 1 formed between the first imaginary line and a second imaginary line passing through the first bonding member and the second bonding member is 100<1<140.

An oscillator includes a substrate having a first substrate main surface and a substrate side surface, and a lid body bonded to the substrate and including a metal material, in which the substrate includes a substrate body having a first substrate body main surface corresponding to the first substrate main surface and a substrate body side surface corresponding to the substrate side surface, and provided with a cutout portion in the substrate body side surface, a side surface wiring provided along the cutout portion, a filling member provided in the cutout portion, and an insulating coating member provided on the first substrate body main surface.

Provided is a crystal element that includes: a crystal piece that is in a substantially rectangular shape on a plan view; an excitation electrode part located on both main surfaces of the crystal piece; a connection lead part extended to a first short-side of the crystal piece from the excitation electrode part; a convex part located on both ends of a second short-side of the crystal piece; and a projected part located on both ends of the first short-side of the crystal piece. Further, a concave part is located in the convex part, and a recessed part is located in the projected part.

A quartz crystal resonator unit that includes a quartz crystal resonator, a lid member and a base member defining an internal space that accommodates the quartz crystal resonator, and a sealing frame and a joining material joining the lid member and the base member to each other. In a plan view of a principal surface of the base member, the sealing frame and the joining material have a frame shape surrounding the quartz crystal resonator, and the frame shape has a uniform width.

A vibration device includes a first substrate including a first surface and a second surface opposite to the first surface; a second substrate including a third surface bonded to the second surface thereby forming an accommodation space between the first substrate and the second substrate, and a fourth surface opposite to the third surface; a vibration element accommodated in the accommodation space; and a first external coupling terminal arranged at the fourth surface and having a first position to where a first wire to be coupled. The first position being within an area overlapping a bonding area between the first substrate and the second substrate, as viewed in a plan view.

A crystal vibrator according to the present invention includes a crystal blank generating thickness shear vibration, a pair of excitation electrodes on both surfaces of the crystal blank, and a pair of extraction electrodes respectively extracted from the excitation electrodes. The crystal blank includes a region provided with a plurality of hill parts which are covered by an excitation electrode. Due to hill parts, it is possible to increase adhesion to the excitation electrodes and to provide a highly reliable crystal vibrator.

A piezoelectric device is provided and includes: a piezoelectric vibrating piece, having an outer shape in rectangular shape and including an excitation electrode formed on both principal surfaces which are a top surface and a lower surface, an electrode pad formed at both ends of one short side, and an extraction electrode extracted from the excitation electrode to the electrode pad to be electrically connected to the electrode pad; a package, including a placement surface on which the piezoelectric vibrating piece is placed as opposed to the lower surface of the piezoelectric vibrating piece, and an adhesion pad formed on the placement surface; and a conductive adhesive, securing the piezoelectric vibrating piece to the package and electrically connecting the adhesion pad to the electrode pad. An adhesive is applied on the top surface of the piezoelectric vibrating piece and between the conductive adhesive and the excitation electrode.

In a crystal unit, a substrate is rectangle-shaped. A frame includes a pair of portions located in regions on the sides of a pair of short sides of the substrate on the lower surface of the substrate and forms a concave portion between these pair of portions. An electrode pad is located on the upper surface of the substrate. A connection pad is located on the lower surface of the substrate within the frame. A plurality of external terminals are located on the lower surface of the frame. A crystal element is mounted on the electrode pad. A temperature sensing element is mounted on the connection pad. A ratio S2/S1 of an area S1 of a rectangular region formed by an outer edge of the lower surface of the frame and an area S2 of a smallest rectangular region containing all of the external terminals is 0.75 to 0.91.

An oscillator includes a first package including a first base, and a first lid bonded to the first base, a first temperature controller housed in the first package, and mounted on the first base, a second temperature controller housed in the first package, and mounted on the first base, and a circuit element housed in the first package, mounted on the first base, and including at least a part of an oscillation circuit, the circuit element is disposed between the first temperature controller and the second temperature controller in a planar view.