Abstract: Disclosed herein is a coil component that includes a first coil pattern wound in a planar spiral shape. At least one turn constituting the first coil pattern is divided into a plurality of lines by a spiral slit, and a space width between the plurality of lines differs depending on a planar position.

Abstract: Disclosed herein is a coil component that includes first and second substrates, a first coil pattern formed on one surface of the first substrate, a second coil pattern formed on one surface of the second substrate, a first terminal electrode connected to one end of the first coil pattern and protruding from the first substrate, and a second terminal electrode connected to one end of the second coil pattern and protruding from the second substrate. The first and second substrates are laminated such that the first and second terminal electrodes overlap each other and are connected to each other.

Abstract: Disclosed herein is a coil component that includes first and second substrates, a first coil pattern formed on one surface of the first substrate, a second coil pattern formed on one surface of the second substrate, a first terminal electrode connected to one end of the first coil pattern and protruding from the first substrate, and a second terminal electrode connected to one end of the second coil pattern and protruding from the second substrate. The first and second substrates are laminated such that the first and second terminal electrodes overlap each other and are connected to each other.

Abstract: Disclosed herein is a coil component that includes a drum core having a winding core part and first and second flange parts provided on both sides of the winding core part; a wire wound around the winding core part; a plurality of terminal electrodes connected with end portions of the wire, each of the terminal electrodes being provided on an associated one of the first and second flange parts; and a top plate fixed to the first and second flange parts. The top plate includes a magnetic layer comprising magnetic powder and binder resin, and a resin layer having a smaller content of the magnetic powder than that of the magnetic layer. The resin layer is positioned between the first and second flange parts and the magnetic layer.

Abstract: Disclosed herein is a coil component that includes a first coil pattern wound in a planar spiral shape . At least one turn constituting the first coil pattern is divided into a plurality of lines by a spiral slit, and a space width between the plurality of lines differs depending on a planar position.

Abstract: A coil device includes a winding core with a coil portion wound by a wire, first and second flanges with open magnetic circuit respectively formed on both sides of the winding core in an axial direction, and a first facing surface of the first flange and a second facing surface of the second flange facing each other in the axial direction on an outer circumference side of the coil portion. S1/S2 is 0.2 to 1.0, where S1 is a maximum lateral cross sectional area of the winding core as seen from the axial direction, and S2 is a projected overlapping area overlapped by the first facing surface and the second facing surface as seen from the axial direction.

Abstract: Disclosed herein is an antenna device including a first metal layer having first and second areas, a coil pattern having first and second terminals, a first wiring pattern connected between the first area of the first metal layer and the first terminal of the coil pattern, and a second wiring pattern connected between the second area of the first metal layer and the second terminal of the coil pattern. The first metal layer, the first wiring pattern, and the second wiring pattern constitute at least a part of a loop antenna.

Abstract: Disclosed herein is an antenna device that includes a planar coil pattern having first, second, third and fourth sections, the first and second sections being opposite to each other, and the third and fourth sections being opposite to each other, and a metal layer having at least one aperture. A part of the first section and a part of the second section overlap the metal layer, and a remaining part of the first section and a remaining part of the second section overlap the aperture. A part or an entirety of both the third and fourth sections overlaps the metal layer or the aperture.

Abstract: Disclosed herein is a wire that includes: a core wire made of a conductor; an insulating film covering an outer periphery of the core wire; a catalyst adsorption film covering an outer periphery of the insulating film, the catalyst adsorption film including a catalyst serving as a reaction start point of electroless plating; and an outer periphery conductor covering an outer periphery of the catalyst adsorption film.

Abstract: Disclosed herein is a wiring component that includes a base material and a planar coil pattern formed on the base material. The planar coil pattern includes a coil wiring portion having one end, other end, and first to third connecting positions, the second connecting position being closer to the other end compared with the first connecting position, the third connecting position being closer to the one end compared with the second connecting position; a power-feed wiring portion connected to the first connecting position; and a connection wiring portion that short-circuits the second connecting position and the third connecting position. A cross-section structure of the planar coil pattern has a base resin layer formed on the base material, and a conductive layer formed on the base resin layer.

Abstract: Disclosed herein is a method for manufacturing a planar coil, the method including forming a base conductive layer on a base material, the base conductive layer including: a coil wiring portion having one end, other end, and first to third connecting positions, the second connecting position being closer to the other end compared with the first connecting position, the third connecting position being closer to the one end compared with the second connecting position; a power-feed wiring portion that connects the first connecting position with an external power source; and a connection wiring portion that short-circuits the second connecting position and the third connecting position; forming a wiring conductive layer on the base conductive layer by electrolytic plating by feeding power from the external power source; and removing the power-feed wiring portion and the connection wiring portion.

Abstract: Disclosed herein is a coil component that includes a drum core having a winding core part and first and second flange parts provided on both sides of the winding core part; a wire wound around the winding core part; a plurality of terminal electrodes connected with end portions of the wire, each of the terminal electrodes being provided on an associated one of the first and second flange parts; and a top plate fixed to the first and second flange parts. The top plate includes a magnetic layer comprising magnetic powder and binder resin, and a resin layer having a smaller content of the magnetic powder than that of the magnetic layer. The resin layer is positioned between the first and second flange parts and the magnetic layer.

Abstract: Disclosed herein is a coil component that includes a drum core having a winding core and first and second flange portions provided at opposite ends of the winding core; a wire wound around the winding core; terminal electrodes provided in the first and second flange portions, the terminal electrodes being connected to ends of the wire; and a magnetic top plate made of magnetic-powder containing resin in which soft magnetic metal powder having a flat shape is mixed in binder resin, the magnetic top plate being fixed to the first and second flange portions.

Abstract: An antenna device is provided with a substrate; an antenna coil formed into a loop-shaped or spiral-shaped on the substrate; a first metallic layer overlapping with a first part of the antenna coil in a planar view; and a second metallic layer overlapping with a second part of the antenna coil different from the first part. The first and second metallic layers are disposed on both sides of a center of an inner diameter portion of the antenna coil in a planar view, respectively. A slit formed between the first and second metallic layers overlaps with the inner diameter portion of the antenna coil in a planar view. At least one of the first and second metallic layers is formed on the substrate together with the antenna coil.

Abstract: Disclosed herein is a coil component that includes a drum core having a winding core and first and second flange portions provided at opposite ends of the winding core; a wire wound around the winding core; terminal electrodes provided in the first and second flange portions, the terminal electrodes being connected to ends of the wire; and a magnetic top plate made of magnetic-powder containing resin in which magnetic powder is mixed in binder resin, the magnetic top plate being fixed to the first and second flange portions. The magnetic top plate has a lower surface facing the first and second flange portions and an upper surface located opposite to the lower surface. The density of the binder resin is higher in a surface layer part on a side of the lower surface than in a surface layer part on a side of the upper surface.

Abstract: A coil device includes a winding core with a coil portion wound by a wire and a pair of flanges respectively formed on both sides of the winding core in an axial direction. The coil portion includes a bank winding portion with double layer constituted by the wire wound around an outer circumference of the winding core and a layer winding portion with single layer constituted by the wire wound closely and adjacently to the bank winding portion along the axial direction of the winding core.

Abstract: Disclosed herein is antenna device that includes: a first metal member having a first main surface; a second metal member having a second main surface parallel to the first main surface; and an antenna coil having a coil axis perpendicular to the first and second main surfaces, wherein the first metal member constitutes at least a part of a housing of a portable electronic device in which the antenna coil is mounted, at least one slit is formed between the first and second metal members, an inner diameter section of the antenna coil overlaps with the slit in planar view, and the slit has a constant width at least in a region that overlaps with the antenna coil in planar view.

Abstract: A magnetism suppressing sheet is provided with a metallic foil formed by plating and a magnetic film formed by applying magnetic metal powder-containing resin paste to one main surface of the metallic foil. A manufacturing method of a magnetism suppressing sheet includes the steps of preparing a support film on which a metallic foil has been formed, and forming a magnetic film by applying a magnetic metal powder-containing paste to one main surface of the metallic foil.

Abstract: An antenna device is provided with first and second substrates opposed to each other, one or more first wiring patterns provided on the first substrate, one or more second wiring patterns provided on the second substrate, and a plurality of connection conductors each connecting an end portion of its corresponding first wiring pattern and an end portion of its corresponding second wiring pattern. The first wiring patterns, second wiring patterns and the plurality of connection conductors constitute an antenna coil.