Abstract: A package of a quartz resonator includes a tabular base substrate, a base material of which is a single layer, a lid section that has a recess and covers the base substrate, and a bonding material provided over the entire periphery of one principal plane of the base substrate and including low-melting glass for bonding the base substrate and the lid section. Internal electrodes are provided on the one principal plane of the base substrate. External electrodes are provided on the other principal plane of the base substrate. A wire contains an Ag—Pd alloy having a glass component and crosses the bonding material on the one principal plane.

Abstract: A piezoelectric device comprises: a piezoelectric resonator element having a base, a plurality of oscillating arms paralleled each other and extended from the base, a plurality of supporting arms extended from the base and in parallel with the side surface of each of the plurality of oscillating arms so as to sandwich the plurality of oscillating arms, a groove formed in at least one of a front surface and a back surface of each of the plurality of oscillating arms and an end weight layer formed in at least one of the front surface and the back surface near to an end portion of each of the plurality of oscillating arms; a package storing the piezoelectric resonator element within a containable recess and being air-tightly sealed by a lid; a bottom surface recess rimmed in the bottom surface of the containable recess; and a connecting pad formed as a protrusion in an region that is connected with the plurality of supporting arms in the bottom surface of the containable recess.

Abstract: A piezoelectric device, includes: a package; a piezoelectric resonator element housed in the package; a lid made of metal and bonded to the package by seam welding to seal the package air-tightly; a metal film for frequency adjustment that is provided to the piezoelectric resonator element; and a window part provided to the lid and enabling a light to transmit therethrough.

Abstract: A piezoelectric resonator element includes: a base in a predetermined length, the base being made of a piezoelectric material; a plurality of resonating arms extending from a first end of the base; a joining part connected to a second end apart from the first end of the base by a predetermined distance; a connecting part connected to the joining part and extending in a width direction of the piezoelectric resonator element; a supporting arm connected to the connecting part and extending in a same direction as the resonating arm at an outer side of the plurality of resonating arms. A ratio L3/h is 40% or less where h is a length dimension from the first end of the base to the second end opposite to the resonating arms of the piezoelectric resonator element, and L3 is a width dimension of the connecting part connecting the supporting arm to the base through the joining part.

Abstract: A piezoelectric device comprises: a piezoelectric resonator element having a base, a plurality of oscillating arms paralleled each other and extended from the base, a plurality of supporting arms extended from the base and in parallel with the side surface of each of the plurality of oscillating arms so as to sandwich the plurality of oscillating arms, a groove formed in at least one of a front surface and a back surface of each of the plurality of oscillating arms and an end weight layer formed in at least one of the front surface and the back surface near to an end portion of each of the plurality of oscillating arms; a package storing the piezoelectric resonator element within a containable recess and being air-tightly sealed by a lid; a bottom surface recess rimmed in the bottom surface of the containable recess; and a connecting pad formed as a protrusion in an region that is connected with the plurality of supporting arms in the bottom surface of the containable recess.

Abstract: A piezoelectric device, includes: a package; a piezoelectric resonator element housed in the package; a lid made of metal and bonded to the package by seam welding to seal the package air-tightly; a metal film for frequency adjustment that is provided to the piezoelectric resonator element; and a window part provided to the lid and enabling a light to transmit therethrough.

Abstract: Disclosed is a vacuum circuit breaker including a small-sized electrode structure capable of reducing deformation with age thereby enhancing the reliability and a vacuum bulb and a vacuum bulb electrode used for the breaker. In the vacuum circuit breaker, each of a fixed electrode and a movable side electrode includes an arc electrode made from particles of a refractory metal material, a high conductive metal material and a low melting point metal; an electrode supporting portion, made from the high conductive metal material, for supporting the arc electrode; a back conductor having a diameter smaller than the electrode supporting portion; and an external side connecting portion having a diameter larger than that of the back conductor. The arc electrode is integrated with the electrode supporting portion, back conductor, and external side connecting portion by the high conductive metal material, preferably, by melting of the highly conductive metal material.

Abstract: A vacuum switch having a fixed side electrode unit and a movable side electrode unit mounted in a vacuum vessel. Each electrode unit includes an arc electrode, an arc electrode supporting member for supporting the arc electrode, a coil electrode and a conducting rod. Joining portions between the arc electrode and the arc electrode supporting member, the coil electrode and the conducting rod are integrally and directly formed metallurgically by solid phase diffusion using a hot isostatic process. A vacuum circuit breaker may be constructed incorporating the vacuum switch.