Abstract: An inductor having a metal wire which is made of a copper base wire, a first film of a metal which is diffusible into solder, on the copper base wire, a second film of a metal which has fine solderability, on the first metal film, and an insulating coat on the second metal film.

Abstract: A chip coil wherein the coil wound around the core is enclosed with a sleeve core. The upper surfaces of the core and the sleeve core are ground so as to adjust the inductance of the chip coil.

Abstract: A chip-type coil whose terminal electrodes are formed directly on a magnetic core and each comprise a mixture of electrically conductive material with insulating material, so that specific resistance of the terminal electrode can increase so as to reduce an eddy current flowing in the terminal electrode, thereby preventing Q-deterioration in the chip-type coil. Moreover, the chip-type coil is allowable of Q-deterioration caused by metal plating, thereby enabling the terminal electrodes to be applied with metal plating.

Abstract: A coil (33, 33a) is wound on a bobbin (22, 22a), one flange (24, 24a) of which has an end surface provided with a central projection (26, 26a) on its center and first and second end projections (27, 27a; 28, 28a) on its opposite end portions respectively, thereby to define first and second cavities (29, 29a; 30, 30a). First and second electrodes (31, 31a; 32, 32a) are provided to extend from the first and second end portions of the flange toward its side surface. First and second terminals (34, 34a; 35, 35a) of the coil are respectively received in the first and second cavities, which in turn are filled with solder members (36, 36a; 37, 37a) to electrically connect the first and second terminals to the first and second electrodes respectively. The first and second end projections are adapted to reduce the volume of solder required for mounting the chip-type coil element as well as to substantially prevent the coil element from inclination, thereby to prevent a tombstoning phenomenon.

Abstract: A chip inductor having a pair of terminal electrodes formed on the surface of a magnetic core which holds a winding therearound. The terminal electrodes have films which are made from a nickel alloy having a relatively high resistivity and a relatively low magnetic permeability. Such nickel alloys includes, for example, nickel-chromium alloy, nickel-phosphorus alloy and nickel-copper alloy.

Abstract: A chip coil which includes a bobbin, flange portions formed at opposite end portions of the bobbin, a wire wound around a barrel portion of the bobbin, and at least two counter-part blocks of magnetic particle-containing solid resin, disposed around the wound wire. The counter-part blocks of magnetic particle-containing solid resin are adapted to be fixed to each other into one combined unit.