Abstract: A piezoelectric device including: a piezoelectric element having, on a surface of a piezoelectric body, an exciting electrode and a drawing electrode that is electrically coupled to the exciting electrode and draws an electrode to an external section, and a substrate bonded to the drawing electrode with a metallic brazing material, in that: the piezoelectric element contains a connecting electrode connecting the exciting electrode with the drawing electrode; and the connecting electrode and/or the exciting electrode contains an underlying layer provided on the surface of the piezoelectric body and a surface layer section provided on a surface of this underlying layer, wherein: the underlying layer is provided using the metallic brazing material and a metallic material of adverse wettability; and a portion of the surface layer section is removed in a manner that the exciting electrode and the drawing electrode are separated.

Abstract: A piezoelectric device includes: a lower substrate; an upper substrate; an intermediate substrate sandwiched between the lower substrate and the upper substrate, the intermediate substrate including: a piezoelectric vibrating portion; a frame surrounding a periphery of the piezoelectric vibrating portion; a connecting portion coupling the piezoelectric vibrating portion and the frame; a first exciting electrode disposed on an upper surface of the piezoelectric vibrating portion; a second exciting electrode disposed on a lower surface of the piezoelectric vibrating portion; a first wiring line electrically coupled to the first exciting electrode; and a second wiring line electrically coupled to the second exciting electrode; and an inside surface coupling an upper surface and a lower surface of the frame and having a slanted surface having an interior angle with respect to one of the upper surface and the lower surface, the angle being 90 degrees or more.

Abstract: A piezoelectric resonator includes a resonator substrate, a base substrate supporting the resonator substrate, a lid substrate covering a surface of the resonator substrate, the surface being on an opposite side of a surface facing the base substrate, a first excitation electrode formed on the surface of the resonator substrate facing the lid substrate, a second excitation electrode formed on the surface of the resonator substrate facing the base substrate, and a third electrode provided on the surface of the resonator substrate facing the base substrate, the third electrode being electrically connected to the first excitation electrode through a concave portion which is formed on a side surface of the resonator substrate.

Abstract: A piezoelectric resonator includes a resonator substrate, a base substrate supporting the resonator substrate, a lid substrate covering a surface of the resonator substrate, the surface being on an opposite side of a surface facing the base substrate, a first excitation electrode formed on the surface of the resonator substrate facing the lid substrate, a second excitation electrode formed on the surface of the resonator substrate facing the base substrate, and a third electrode provided on the surface of the resonator substrate facing the base substrate, the third electrode being electrically connected to the first excitation electrode through a concave portion which is formed on a side surface of the resonator substrate.

Abstract: [Problem] To provide a piezoelectric device with which it is possible to prevent a brazing material from attaching to a vibrating area, prevent solder eating, and to thereby obtain excellent vibration characteristics.

Abstract: A piezoelectric device includes: a lower substrate; an upper substrate; an intermediate substrate sandwiched between the lower substrate and the upper substrate, the intermediate substrate including: a piezoelectric vibrating portion; a frame surrounding a periphery of the piezoelectric vibrating portion; a connecting portion coupling the piezoelectric vibrating portion and the frame; a first exciting electrode disposed on an upper surface of the piezoelectric vibrating portion; a second exciting electrode disposed on a lower surface of the piezoelectric vibrating portion; a first wiring line electrically coupled to the first exciting electrode; and a second wiring line electrically coupled to the second exciting electrode; and an inside surface coupling an upper surface and a lower surface of the frame and having a slanted surface having an interior angle with respect to one of the upper surface and the lower surface, the angle being 90 degrees or more.

Abstract: A piezoelectric resonator includes a resonator substrate, a base substrate supporting the resonator substrate, a lid substrate covering a surface of the resonator substrate, the surface being on an opposite side of a surface facing the base substrate, a first excitation electrode formed on the surface of the resonator substrate facing the lid substrate, a second excitation electrode formed on the surface of the resonator substrate facing the base substrate, and a third electrode provided on the surface of the resonator substrate facing the base substrate, the third electrode being electrically connected to the first excitation electrode through a concave portion which is formed on a side surface of the resonator substrate.

Abstract: A piezoelectric resonator includes a resonator substrate, a base substrate supporting the resonator substrate, a lid substrate covering a surface of the resonator substrate, the surface being on an opposite side of a surface facing the base substrate, a first excitation electrode formed on the surface of the resonator substrate facing the lid substrate, a second excitation electrode formed on the surface of the resonator substrate facing the base substrate, and a third electrode provided on the surface of the resonator substrate facing the base substrate, the third electrode being electrically connected to the first excitation electrode through a concave portion which is formed on a side surface of the resonator substrate.

Abstract: A piezoelectric oscillator semiconductor circuit comprises a piezoelectric oscillator which is set to a designated oscillation frequency via electrical coupling to a separate semiconductor element comprising an oscillation circuit. The oscillation circuit in the semiconductor element has a gate lead and a drain lead connected to the piezoelectric oscillator to set the frequency of operation of the piezoelectric oscillator. Included in the semiconductor element are adjustment means comprising one or more frequency adjustment elements which may be selectively connected to one of the connection leads whereby the frequency of operation of the piezoelectric oscillator may be selectively changed without need for replacement or change of the semiconductor element. The frequency adjustment elements may be comprised of one or more fixed, separately formed capacitances provided as part of the semiconductor element but are electrically independent of the oscillation circuit, i.e.