An electronic component comprises: a magnetic core having a flat base and a core, the flat base having a top, a bottom, and first and second opposite sides, the core is on the top; a winding having an edgewise coil including a wound flat wire and the core, the winding having two non-wound flat wires extending therefrom; and a magnetic exterior body covering the core and the edgewise coil. The two non-wound flat wires extend along the top, the first side, the bottom and then the second side, and the two non-wound flat wires are non-adhesively positioned around the flat base. The two non-wound flat wires on the bottom are externally exposed electrodes. The second side inclines towards the core. The two ends of the two non-wound flat wires are embedded into the magnetic exterior body to fix the two non-wound flat wires to the magnetic exterior body.

A power transformer includes at least two first windings, at least two second windings interleaved with the at least two first windings, and a magnetic core. The at least two first windings and the at least two second windings are positioned adjacent the magnetic core. Each first winding includes a wire and a plurality of turns. One or more windings of the at least two first windings include a bonding material and at least two adjacent turns of said plurality of turns adhered to each other via the bonding material. Other example power transformers, methods of manufacturing power transformers, and methods of manufacturing windings are also disclosed.

A method of making an inductor includes forming a plurality of first metal layers on a substrate and an ILD. The method includes patterning a plurality of trenches in the ILD, depositing a magnetic material, and depositing another layer of ILD. The method further includes patterning a plurality of vias adjacent to the trenches filled with the magnetic material, and patterning trenches in the another layer of ILD. The trenches in the another layer of ILD include first portions arranged over, adjacent to and substantially parallel the plurality of first metal layers, and the second portions arranged substantially perpendicular to the first portions, extending from both ends of the first portions, and oriented in opposite directions such that the second portions are continuous with the plurality of vias. The method includes depositing a metal in the plurality of vias and the trenches in the another layer of ILD.

A mother substrate that enables winding cores to be obtained in a manner in which the mother substrate is divided along x-direction division lines and y-direction division lines is prepared. Subsequently, x-direction division grooves are formed along the x-direction division lines on a first main surface of the mother substrate, y-direction division grooves are formed along the y-direction division lines on the first main surface, and shallow bottom surface exposure grooves, for exposing surfaces that are to be core portion bottom surfaces, are formed on the first main surface. The mother substrate is divided by performing a flattening process on a second main surface of the mother substrate that is opposite the first main surface until the second main surface reaches the x-direction division grooves and the y-direction division grooves to obtain the winding cores that are separated from each other.

A wireless charging coil is provided herein. The 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, wherein the first stamped coil and second stamped coil are planar to and interconnected with one another, such that the first stamped coil is positioned within the second space of the second stamped coil, and the second stamped coil is positioned within the first space of the first stamped coil.

A wireless charging coil is provided herein. The 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, wherein the first stamped coil and second stamped coil are planar to and interconnected with one another, such that the first stamped coil is positioned within the second space of the second stamped coil, and the second stamped coil is positioned within the first space of the first stamped coil.

A method for forming an inductor device. The method comprises forming a trench within a central core region of a conductive coil formed within a dielectric material. The method further comprises forming a composite region within the trench. The composite region including a polymer matrix having a plurality of particles with magnetic properties dispersed therein with the central core region to reduce eddy current loss and increase energy storage.

A flat coil, a manufacturing method thereof and an electronic apparatus are disclosed. The manufacturing method comprises: rolling a metal foil lamination onto a carrier roller to form a foil rod, wherein the metal foil lamination includes at least one layer of metal foil; sliding the foil rod from the carrier roller; slicing the foil rod into thin disks; and processing the thin disks to form at least one flat coil, wherein a pressing roller is pressed against the carrier roller via the metal foil lamination with a controlled pressing force as the metal foil lamination is rolled.

A coil includes first and second coil elements both of which are formed by feeding one piece of a rectangular wire rod by a predetermined amount and winding rectangularly in an edgewise manner using winding heads, the first and second coil elements being wound in opposite directions from each other. A winding terminating end point of the first coil element is bent approximately 90 degrees in a direction opposite to a winding direction of the first coil element, and is connected to a winding terminating end point of the second coil element in a same flat plane. The second coil element includes an offset portion of the rectangular wire rod that is offset in a plan view from a side of the second coil element.

A ferroresonant transformer assembly comprising, a core, a main shunt, first, second, and third windings, first and second tap connectors, and a selection connector. The first windings configured to be operatively connected to a primary power source. The first tap connector operatively connected to a first intermediate point defined by the third windings. The second tap connector operatively connected to a second intermediate point defined by the third windings. The selection connector operatively connected to the at least one load. Based on voltage requirements of the at least one load, the selection connector is operatively selectively connected to a selected tap connector selected from the first and second tap connectors.