Abstract: A method of manufacturing a coil component having terminal electrodes with high mounting strength, includes: embedding an air-core coil in complex magnetic material being a mixture of resin and metal magnetic grains, molding the magnetic material so that both ends of the coil are exposed on its surface, curing the resin in the molding, thereby obtaining a magnetic body in which the coil is embedded, polishing and etching a surface where the ends of the coil are exposed, sputtering metal material onto an etched surface of the magnetic body, thereby forming an underlying layer across a surface of the magnetic body and ends of the coil, and then forming a cover layer that covers an outer side of the underlying layer, thereby forming terminal electrodes constituted by the underlying layer and cover layer.

Abstract: A coil component includes an air-core coil embedded in a magnetic body constituted by resin and metal magnetic grains. Both ends of the coil are exposed on the surface of the magnetic body, and the side on which both ends are exposed is polished and etched to form terminal electrodes. To be specific, an underlying layer of metal material is formed across the surface of the magnetic body and the ends by means of sputtering, and then a cover layer is formed. Where the magnetic body contacts the underlying layer, the areas where the underlying layer is in contact with the resin ensure insulation, while the contact between the underlying layer and the exposed parts of the metal magnetic grains ensures adhesion, thus increasing the adhesion strength with respect to the terminal electrodes.

Abstract: A coil component includes an air-core coil embedded in a magnetic body constituted by resin and metal magnetic grains. Both ends of the coil are exposed on the surface of the magnetic body, and the side on which both ends are exposed is polished and etched to form terminal electrodes. To be specific, an underlying layer of metal material is formed across the surface of the magnetic body and the ends by means of sputtering, and then a cover layer is formed. Where the magnetic body contacts the underlying layer, the areas where the underlying layer is in contact with the resin ensure insulation, while the contact between the underlying layer and the exposed parts of the metal magnetic grains ensures adhesion, thus increasing the adhesion strength with respect to the terminal electrodes.

Abstract: A coil component includes an air-core coil embedded in a magnetic body constituted by resin and metal magnetic grains. Both ends of the coil are exposed on the surface of the magnetic body, and the side on which both ends are exposed is polished and etched to form terminal electrodes. To be specific, an underlying layer of metal material is formed across the surface of the magnetic body and the ends by means of sputtering, and then a cover layer is formed. Where the magnetic body contacts the underlying layer, the areas where the underlying layer is in contact with the resin ensure insulation, while the contact between the underlying layer and the exposed parts of the metal magnetic grains ensures adhesion, thus increasing the adhesion strength with respect to the terminal electrodes.

Abstract: An electronic component has a shaft, a flange formed at an end of the shaft and constituting a core together with the shaft, a coiled conductor wound around the shaft, and an electrode terminal formed on the flange and connected electrically to an end of the conductor; wherein the shaft and flange are made of metal magnetic grains containing Fe which are bonded to each other by bonding of oxide film formed on each metal magnetic grain, and the shaft is more densely filled with the metal magnetic material than is the flange. The electronic component can achieve size reduction and frequency increase by improving the magnetic permeability while also improving the plating property for the terminal electrode.

Abstract: A coil component includes an air-core coil embedded in a magnetic body constituted by resin and metal magnetic grains. Both ends of the coil are exposed on the surface of the magnetic body, and the side on which both ends are exposed is polished and etched to form terminal electrodes. To be specific, an underlying layer of metal material is formed across the surface of the magnetic body and the ends by means of sputtering, and then a cover layer is formed. Where the magnetic body contacts the underlying layer, the areas where the underlying layer is in contact with the resin ensure insulation, while the contact between the underlying layer and the exposed parts of the metal magnetic grains ensures adhesion, thus increasing the adhesion strength with respect to the terminal electrodes.

Abstract: A coil component includes an air-core coil embedded in a magnetic body constituted by resin and metal magnetic grains. Both ends of the coil are exposed on the surface of the magnetic body, and the side on which both ends are exposed is polished and etched to form terminal electrodes. To be specific, an underlying layer of metal material is formed across the surface of the magnetic body and the ends by means of sputtering, and then a cover layer is formed. Where the magnetic body contacts the underlying layer, the areas where the underlying layer is in contact with the resin ensure insulation, while the contact between the underlying layer and the exposed parts of the metal magnetic grains ensures adhesion, thus increasing the adhesion strength with respect to the terminal electrodes.

Abstract: An electronic component has a shaft, a flange formed at an end of the shaft and constituting a core together with the shaft, a coiled conductor wound around the shaft, and an electrode terminal formed on the flange and connected electrically to an end of the conductor; wherein the shaft and flange are made of metal magnetic grains containing Fe which are bonded to each other by bonding of oxide film formed on each metal magnetic grain, and the shaft is more densely filled with the metal magnetic material than is the flange. The electronic component can achieve size reduction and frequency increase by improving the magnetic permeability while also improving the plating property for the terminal electrode.

Abstract: Provided is an electronic component having a core that can achieve size reduction and frequency increase by improving the magnetic permeability further while also improving the plating property for the terminal electrode. An electronic component has a shaft, a flange formed at an end of the shaft and constituting a core together with the shaft, a coiled conductor wound around the shaft, and an electrode terminal formed on the flange and connected electrically to an end of the conductor; wherein the shaft and flange are made of a metal magnetic material, and the shaft is more densely filled with the metal magnetic material than is the flange.

Abstract: A coil component includes an air-core coil embedded in a magnetic body constituted by resin and metal magnetic grains. Both ends of the coil are exposed on the surface of the magnetic body, and the side on which both ends are exposed is polished and etched to form terminal electrodes. To be specific, an underlying layer of metal material is formed across the surface of the magnetic body and the ends by means of sputtering, and then a cover layer is formed. Where the magnetic body contacts the underlying layer, the areas where the underlying layer is in contact with the resin ensure insulation, while the contact between the underlying layer and the exposed parts of the metal magnetic grains ensures adhesion, thus increasing the adhesion strength with respect to the terminal electrodes.

Abstract: Provided is an electronic component having a core that can achieve size reduction and frequency increase by improving the magnetic permeability further while also improving the plating property for the terminal electrode. An electronic component has a shaft, a flange formed at an end of the shaft and constituting a core together with the shaft, a coiled conductor wound around the shaft, and an electrode terminal formed on the flange and connected electrically to an end of the conductor; wherein the shaft and flange are made of a metal magnetic material, and the shaft is more densely filled with the metal magnetic material than is the flange.

Abstract: As an embodiment, a pair of first conductive films 12, 13 are formed from the side face to the bottom face of the sheet part 11a of a magnetic core 11, and one end 14b of the conductive wire of the coil 14 and the other end 14c of the conductive wire are joined to the side faces 12a, 13a of the first conductive films 12, 13, respectively. Also, as an embodiment, the joined parts 14b1, 14c1 are sandwiched by the side faces 12a, 13a of the first conductive films 12, 13 and the part 15a of the magnetic sheath 15 covering the side face of the sheet part 11a of the magnetic core 11, wherein the parts of the magnetic sheath 15 covering the joined parts 14b1, 14c1 are sandwiched by the side faces 12a, 13a of the first conductive films 12, 13 and the side faces 16a, 17a of second conductive films 16, 17 as well as the side faces 18a, 19a of third conductive films 18, 19.

Abstract: As an embodiment, a pair of first conductive films 12, 13 are formed from the side face to the bottom face of the sheet part 11a of a magnetic core 11, and one end 14b of the conductive wire of the coil 14 and the other end 14c of the conductive wire are joined to the side faces 12a, 13a of the first conductive films 12, 13, respectively. Also, as an embodiment, the joined parts 14b1, 14c1 are sandwiched by the side faces 12a, 13a of the first conductive films 12, 13 and the part 15a of the magnetic sheath 15 covering the side face of the sheet part 11a of the magnetic core 11, wherein the parts of the magnetic sheath 15 covering the joined parts 14b1, 14c1 are sandwiched by the side faces 12a, 13a of the first conductive films 12, 13 and the side faces 16a, 17a of second conductive films 16, 17 as well as the side faces 18a, 19a of third conductive films 18, 19.

Abstract: An inductor 10 has a magnetic body 11 of a rectangular solid shape and a coil 12 embedded in the magnetic body 11. The coil 12 integrally has a part constituted by a helically wound coil wire, two leader parts 12a provided at the two ends of the wound part, and terminal parts 13 connected to the ends of the leader parts and wider than the leader parts 12a, where the boundary between each leader part 12a and each terminal part 13 is positioned in the magnetic body 11, and the end of each terminal part 13 is exposed from the corresponding side face of the magnetic body 11 and folded in an L shape along the side face and bottom face.

Abstract: An inductor 10 has a magnetic body 11 of a rectangular solid shape and a coil 12 embedded in the magnetic body 11. The coil 12 integrally has a part constituted by a helically wound coil wire, two leader parts 12a provided at the two ends of the wound part, and terminal parts 13 connected to the ends of the leader parts and wider than the leader parts 12a, where the boundary between each leader part 12a and each terminal part 13 is positioned in the magnetic body 11, and the end of each terminal part 13 is exposed from the corresponding side face of the magnetic body 11 and folded in an L shape along the side face and bottom face.