Abstract: A method of firing magnetic cores includes the steps of attaching a powder to the surface of a plurality of flattened-ring compact bodies made of a magnetic material, arranging the plurality of flattened-ring compact bodies adjacently so that the axes of flattened through-holes of the flattened-ring compact bodies are vertically oriented, and firing the flattened-ring compact bodies while the powder is interposed between the adjacent flattened-ring compact bodies. Alternatively, a method of firing magnetic cores includes the steps of attaching a powder to the surface of a plurality of thin compact bodies made of a magnetic material, vertically arranging the plurality of thin compact bodies adjacently, and firing the thin compact bodies while the powder is interposed between the adjacent thin compact bodies.

Abstract: An inductor includes a bar-shaped ferrite core and a spiral coil. The spiral coil is formed by removing a portion of a conductive film formed at least around the peripheral surface of the ferrite core. The surface of the ferrite core is impregnated with an insulating glass before the conductive film is formed. The content of the glass is preferably about 0.1% to about 20% by weight of the ferrite core. The ferrite core is preferably an Ni—Zn-based ferrite core.

Abstract: A method for producing a multi-layered chip inductor includes the steps of: forming coil-shaped internal conductors inside a green ceramic laminate, each of which coil-shaped internal conductors is spiralled around an axial line in the laminating direction of the green ceramic laminate; applying an external electrode paste onto at least one laminating-direction surface of the green ceramic laminate, which external electrode paste connects to an end of the coil-shaped internal conductor; cutting the green ceramic laminate along the laminating direction into chip-shaped-green ceramic laminates each having the coil-shaped internal conductor inside; and firing each of the chip-shaped green ceramic laminates and baking the external electrode paste to form an external electrode.

Abstract: Three thin-film coils having insulating layers therebetween are laminated on the coil winding portion of the core member. A terminal electrode is electrically connected to the end portion of the third thin-film coil. A terminal electrode is electrically connected to the end portion of the first thin-film coil through the lead-out opening portions and separated areas. In this way, the thin-film coils are electrically connected in series between the terminal electrodes. Then, in the thin-film coils, the winding directions of the neighboring coils having an insulating layer therebetween are opposite to each other.

Abstract: A small-sized multilayer inductor having a greatly increased inductance value includes two thin-film coils with an insulation layer interposed therebetween, the coils being disposed on a coil-winding portion of a wound-core member. At positions opposing flanges of the wound-core member, two terminal electrodes for a first thin-film coil are respectively provided. To one of the two terminal electrodes, the starting end of the first thin-film coil is electrically connected via one connection opening while the finishing end of the first thin-film coil is electrically connected to the other terminal electrode via the other connection opening. Similarly, at positions opposing the flanges of the wound-core member, two terminal electrodes, which are electrically connected to a second thin-film coil, are respectively provided.

Abstract: In a laminated inductor array, four spiral inductors are aligned from the left end surface to the right end surface of a laminated body. In the direction of alignment of the spiral inductors, the number of the coil conductors on the side portion of the left end surface of the inductor located close to the left end portion of the laminated body and the number of the coil conductors on the side portion of the right end surface of the inductor located close to the right end portion of the laminated body are the same.

Abstract: When a plurality of devices are disposed in parallel in a magnetic ceramic laminated member to form a complex electronic component, an insulating member is disposed between adjacent devices. When adjacent devices among a plurality of devices are disposed on different planes in a magnetic ceramic laminated member to form a complex electronic component, an insulating member is disposed at least at a part of an intermediate layer positioned between the adjacent devices in the lamination direction.

Abstract: Three thin-film coils having insulating layers therebetween are laminated on the coil winding portion of the core member. A terminal electrode is electrically connected to the end portion of the third thin-film coil. A terminal electrode is electrically connected to the end portion of the first thin-film coil through the lead-out opening portions and separated areas. In this way, the thin-film coils are electrically connected in series between the terminal electrodes. Then, in the thin-film coils, the winding directions of the neighboring coils having an insulating layer therebetween are opposite to each other.

Abstract: When a plurality of devices are disposed in parallel in a magnetic ceramic laminated member to form a complex electronic component, an insulating member is disposed between adjacent devices. When adjacent devices among a plurality of devices are disposed on different planes in a magnetic ceramic laminated member to form a complex electronic component. an insulating member is disposed at least at a part of an intermediate layer positioned between the adjacent devices in the lamination direction.

Abstract: When a plurality of devices are disposed in parallel in a magnetic ceramic laminated member to form a complex electronic component, an insulating member is disposed between adjacent devices. When adjacent devices among a plurality of devices are disposed on different planes in a magnetic ceramic laminated member to form a complex electronic component, an insulating member is disposed at least at a part of an intermediate layer positioned between the adjacent devices in the lamination direction.

Abstract: A small-sized multilayer inductor having a greatly increased inductance value includes two thin-film coils with an insulation layer interposed therebetween, the coils being disposed on a coil-winding portion of a wound-core member. At positions opposing flanges of the wound-core member, two terminal electrodes for a first thin-film coil are respectively provided. To one of the two terminal electrodes, the starting end of the first thin-film coil is electrically connected via one connection opening while the finishing end of the first thin-film coil is electrically connected to the other terminal electrode via the other connection opening. Similarly, at positions opposing the flanges of the wound-core member, two terminal electrodes, which are electrically connected to a second thin-film coil, are respectively provided.

Abstract: A method for producing a multi-layered chip inductor includes the steps of: forming coil-shaped internal conductors inside a green ceramic laminate, each of which coil-shaped internal conductors is spiralled around an axial line in the laminating direction of the green ceramic laminate; applying an external electrode paste onto at least one laminating-direction surface of the green ceramic laminate, which external electrode paste connects to an end of the coil-shaped internal conductor; cutting the green ceramic laminate along the laminating direction into chip-shaped green ceramic laminates each having the coil-shaped internal conductor inside; and firing each of the chip-shaped green ceramic laminates and baking the external electrode paste to form an external electrode.

Abstract: An insulating ceramic composition which comprises about 62-75 wt % of silicon oxide (in terms of SiO.sub.2), about 4-22 wt % of barium oxide (in terms of BaCO.sub.3), about 0.5-2.5 wt % of aluminum oxide (in terms Al.sub.2 O.sub.3), 0 to about 0.8 wt % of chromium oxide (in terms of Cr.sub.2 O.sub.3), about 0.2-0.8 wt % of calcium oxide (in terms of CaCO.sub.3), about 8-18 wt % of boron oxide (in terms of B.sub.2 O.sub.3), and 0 to about 2.5 wt % of potassium oxide (in terms of K.sub.2 O). A ceramic inductor is made of said insulating ceramic composition.

Abstract: A composite component includes a main body which is constituted by combining a first block which is made of dielectric material and contains capacitor electrodes, with a second block which is made of magnetic material and contains inductor electrodes. The main body is provided with recesses for receiving other components and connection electrodes to which the other components are connected. The connection electrodes are themselves connected to lead-out electrodes. The main body is further provided with external electrodes for connection to the capacitor electrodes, the inductor electrodes and the lead-out electrodes.

Abstract: A composite electronic component includes a sintered body, an inductor part and a capacitor part which are formed in the sintered body, and a ground electrode which is formed on an outer surface of the sintered body to be electrically connected to a first capacitor electrode of the capacitor part and not to reach an outer surface of the inductor part on the outer surface of the sintered body.