Abstract: A laminated coil is constructed such that an inner space of each via hole can be increased while the spacing between adjacent via holes in the axial direction of a coil is prevented from being narrowed. In the via holes of the laminated coil, through-holes formed in ceramic layers and filled with a conductor are arranged in a row in the lamination direction X, and, in each of the through-holes, the difference between the diameter in the axial direction of the coil on the opening surface of one opening of a ceramic layer and the diameter in the axial direction of the coil on the opening surface of the other opening is smaller than the difference between the diameter in the direction Z that is substantially perpendicular to the axial direction Y of the coil on the opening surface of one opening of the ceramic layer and the diameter in the direction Z that is substantially perpendicular to the axial direction Y of the coil on the opening surface of the other opening.

Abstract: A laminated coil is constructed such that an inner space of each via hole can be increased while the spacing between adjacent via holes in the axial direction of a coil is prevented from being narrowed. In the via holes of the laminated coil, through-holes formed in ceramic layers and filled with a conductor are arranged in a row in the lamination direction X, and, in each of the through-holes, the difference between the diameter in the axial direction of the coil on the opening surface of one opening of a ceramic layer and the diameter in the axial direction of the coil on the opening surface of the other opening is smaller than the difference between the diameter in the direction Z that is substantially perpendicular to the axial direction Y of the coil on the opening surface of one opening of the ceramic layer and the diameter in the direction Z that is substantially perpendicular to the axial direction Y of the coil on the opening surface of the other opening.

Abstract: A ceramic capacitor comprising a dielectric ceramic element made of materials a metal oxide as the principal ingredient. On the surface of the dielectric ceramic element are formed a plurality of electrodes. The materials used for the electrode are selected such that their principal ingredients have a stronger oxidizing tendency than those used for the dielectric ceramic element. The electrode is formed by applying this electrode material on the surface of the dielectric ceramic element and subsequently baking in a non-reducing atmosphere. This process reduces the surface of the dielectric ceramic element underneath the electrode and a reduced layer is thus formed.

Abstract: A high-voltage ceramic capacitor comprises a dielectric ceramic element. Electrodes using silver material are formed on the opposite surfaces of the dielectric ceramic element. A reduced region is formed in the vicinity of the end-edge part of each of the electrodes on the surface of the dielectric ceramic element. This reduced region is formed by coating a reducing agent the main component of which is a material having a strong oxidizing inclination on the dielectric ceramic element and heating it. Furthermore, an external terminal is soldered to each of the electrodes.

Abstract: A manufacturing method for a ceramic capacitor superior in breakdown voltage ability, comprising a process of baking opposite electrode on the surface of ceramic dielectric composed mainly of metal oxide and that, simultaneous with or after the above process, of baking in a ring-like shape insulating layers for air cutoff on at least the edges of an electrode.

Abstract: A high voltage capacitor used for a low-pass filter circuit or the like in a magnetron oscillator circuit of an electronic cooking range includes in combination, a capacitor unit, a ground terminal into which the unit is inserted, two perforating conductors inserted through two through-bores extending in the capacitor unit, insulating casings encircling the capacitor unit on both sides of the ground terminal, insulating resin disposed in both of the insulating casings and surrounding the capacitor unit, an electrode at the outer periphery of the capacitor unit, and electrodes at the inner periphery of each through-bore which surround and are conductively coupled to each perforating conductor. When compared to a conventional high voltage capacitor, the present invention has a reduced number of components, is simple in construction, and is not subject to a lowering of the breakdown voltage durability caused by a heat cycle or the like.

Abstract: An arcuate film resistor is defined on an insulating substrate. During use, a high voltage is impressed across end terminals connected to the arcuate film resistor. A central electrode is located on the insulated substrate at a point which is surrounded by the film resistor. The central electrode is formed of a non-film resistor material and has superior adherability to the substrate. A disk-shaped film resistor is deposited at the center of the central electrode and second ring-like film resistor is formed around the outer periphery of the central electrode. A rotatable slider has a first contact positioned over the disk-shaped film resistor and a second contact which slides along the arcuate film resistor. A portion of the voltage from the arcuate film resistor can thus be transferred to the central electrode. The disk-shaped film resistor located on the central electrode improves the contact between the slider at the central electrode.