A wireless charging coil is provided herein. More specifically, provided herein is a wireless charging coil comprising a first stamped coil having a first spiral trace, the first spiral trace defining a first space between windings, and a second stamped coil having a second spiral trace, the second spiral trace defining a second space between windings, the first stamped coil and second stamped coil in co-planar relation, the first stamped coil positioned within the second space of the second stamped coil, and the second stamped coil positioned within the first space of the first stamped coil, the first and second coils electronically connected and an adhesive covering and surrounding the first stamped coil and the second stamped coil to bond the coils together and to insulate the coils.

An electromagnetic connector is disclosed that is configured to form a first magnetic circuit portion comprising a first core member and a first coil disposed of the first core member. The electromagnetic connector is configured to mate with a second electromagnetic connector, where the second electromagnetic connector is configured to form a second magnetic circuit portion comprising a second core member and a second coil disposed of the second core member. The first core member and the second core member are configured to couple the first coil to the second coil with a magnetic circuit formed from the first magnetic circuit portion and the second magnetic circuit portion when the electromagnetic connector is mated with the second electromagnetic connector. The magnetic circuit is configured to induce a signal in the first coil when the second coil is energized.

A coil electronic component includes a body having a coil part disposed therein and external electrodes connected to the coil part. The body includes a plurality of magnetic particles. In one example, a particle size distribution D.sub.50 of the magnetic particles in the body is 1 μm or less. In other examples, a particle size distribution D.sub.99 of the magnetic particles in the body is 1 μm or less; a particle size distribution ratio D.sub.99/D.sub.50 of the magnetic particles in the body is 1.5 or less; and/or a variation coefficient of the particle size of the magnetic particles in the body is 20% or less.

A method for manufacturing a multilayer coil includes preparing a first substrate by forming a first conductor pattern on a first insulating base material layer, preparing a second substrate by forming a second conductor pattern on a second insulating base material layer, and joining a surface of the first substrate on which the first conductor pattern is formed and a surface of the second substrate on which the second conductor pattern is formed together with only a joining layer made of a thermoplastic resin interposed therebetween. Amounts of deformation of the first and second insulating base material layers are less than that of the joining layer at a fusion temperature. The first and second conductor patterns are each a coil pattern having a coil axis that extends in a lamination direction in which the first substrate and the second substrate are laminated together.

An inductor component comprising a first magnetic layer, a spiral wiring disposed on the first magnetic layer, and a second magnetic layer covering the spiral wiring. The first magnetic layer and the second magnetic layer contain a magnetic powder and a resin containing the magnetic powder, and the spiral wiring includes a spiral-shaped first conductor layer and a second conductor layer disposed on the first conductor layer and shaped along the first conductor layer.

One object is to reduce, in a common mode choke coil having three coil conductors, a deviation in stray capacities generated between the coil conductors. A common mode choke coil according to one embodiment of the present invention includes a first coil conductor, a second coil conductor, and a third coil conductor. In said embodiment, the first coil conductor, the second coil conductor, and the third coil conductor extend parallel with each other in a first region in plan view as seen from an axial direction along the coil axis. In said embodiment, in the first region, when seen in a cross section cut along a plane including the coil axis, in an n-th turn, an arranging order of the first coil conductor, the second coil conductor, and the third coil conductor from an inner side in a radial direction thereof is inverted from that in an n+1th turn.

A transmitting element for generating a magnetic field for tracking of an object includes a first spiral trace that extends from a first outer origin inward to a central origin in a first direction. A second spiral trace can extend from the central origin outward to a second outer origin in the first direction. The second spiral trace can extend from the central origin to the second outer origin in the first direction. The first spiral trace and the second spiral trace can be physically connected at the central origin to form the fluorolucent magnetic transmitting element and at least a portion of the first spiral trace overlaps at least a portion of the second spiral trace.

A transformer device includes primary, secondary, and auxiliary windings, located in an insulating substrate by conductive vias joined together by conductive traces. Positions of the conductive vias are arranged so as to optimize the isolation properties of the transformer, and to improve the coupling of the transformer by increasing the leakage inductance and reducing the distributed capacitance. The transformer device is compact and is weakly coupled. The weak coupling between the windings reduces the likelihood of the transformer malfunctioning, particularly when used in a self-resonant converter circuit.

An electronic component includes a body formed of an insulator, a coil positioned in the body and including first and second coil conductors, an outer electrode including a first bottom-surface electrode and a first substantially columnar electrode (first electrode) and connected to the second conductor, and an outer electrode including a second bottom-surface electrode and a second substantially columnar electrode (second electrode) and connected to the first conductor. The second conductor is positioned between the first conductor and a bottom surface of the body. The second electrode is positioned to oppose the first electrode across the coil's central axis when viewed from the z-axis direction. An outermost peripheral portion of the first conductor is superposed with the first electrode when viewed from the z-axis direction. A smallest distance between the first conductor and a first side surface is smaller than that between the second conductor and a second side surface.

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.