A device includes a substrate; a magnetic core in the substrate, including a hole, and divided into a first half and a second half opposite to the first half; a first winding extending through the hole and around the magnetic core; a second winding extending through the hole and around the magnetic core; and a third winding extending through the hole, around the magnetic core, and around a portion of the first winding. The first and the third windings only extend around the same half of the magnetic core. At least one first turn of the second winding extends around the second half of the magnetic core.

The present invention provides for a PCB transformer comprising a core and planar PCB winding, wherein the core has two legs extending from a table portion, and wherein a planar PCB winding extends around each of the said legs, and wherein the outer dimensions of the table portion in regions overlying the planar PCB windings match substantially the outer dimension of the planar PCB winding so as to achieve particularly efficient coupling between the winding and the core.

The invention relates to an electronic component with a cavity in which a magnetic circuit is arranged, the magnetic circuit being formed by the first and second magnetic conductor elements, which have at least one planar coil located between them, each of the magnetic conductor elements having at least one bridge-shaped area, and the turns of the planar coils passing through between the bridge-shaped areas of the magnetic conductor elements, each of the bridge-shaped areas having a first end, the first ends that are opposite one another forming a coil core for the planar coil, and the bridge-shaped areas each having a second end, the opposite second ends closing the magnetic circuit on the periphery of the planar coil.

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.

A magnetic device assembly is provided for maximizing the size of the magnetic components for a predetermined power converter module by co-locating and sharing input, output, and auxiliary terminals between the substrates for the power converter and the magnetic components. Wherein complete power module is the result of constructing the separate constituent parts which include an integrated magnetic substrate, magnetic elements mounted therein, a power converter substrate, associated incorporated components located top and bottom on the power converter substrate, a composite mechanical footprint as defined by the mechanical extents of the integrated magnetic substrate and power converter substrate, and a composite electrical pinout as defined by the input-output pins which are coincident to and co-located as those of the integrated magnetic and power converter substrates.

Provided is a method of forming a coil pattern on at least one surface on a substrate, the method comprising forming a seed layer on at least one surface of a substrate, and forming at least two or more plating layers to cover the seed layer, wherein the two or more plating layers are formed through anisotropic plating.

An integrated magnetic core is provided. The integrated magnetic core includes a first plate and a second plate. The first plate includes a plurality of legs extending outwardly from a first surface of the first plate. The plurality of legs includes first and second oppositely disposed legs and third and fourth oppositely disposed legs. The second plate is coupled to at least the third and fourth legs of the first plate.

An insulation type step-down converter includes first and second step-down transformers each of which includes an input-side coil and an output-side coil. First, second, third, and fourth rectifier elements are connected in series with first, second, third, and fourth series coils, respectively, the first, second, third, and fourth series coils each having the output-side coil of the first step-down transformer and the output-side coil of the second step-down transformer connected in series. The first to fourth series coils are connected to smoothing coils. The connection is such that electric currents flow simultaneously only in one of the first and second series coils and one of the third and fourth series coils in an alternate manner, and electric currents flowing simultaneously in one of the first and second series coils and one of the third and fourth series coils are opposite in direction to each other.

For producing an inter-layer conductive structure of a circuit board, an insulating layer, a first conductive layer, a second conductive layer and an electric contact material are provided, wherein the insulating layer includes at least a conductive hole therein. The electric contact material is inserted into the conductive hole of the insulating layer to form a conductive plug, and the first and second conductive layers are laminated to opposite surfaces of the insulating layer, respectively. After lamination, the conductive plug has two ends thereof in electric contact with the first conductive layer and the second conductive layer, respectively.

Provided is an electrically insulated component for use in a planar transformer. The insulated component may include a planar transformer conductive component having a first surface, a second surface and a plurality of edges. The insulated component may also include a first layer including an oxidized metal coating, as well as a second layer including an electrophoretically deposited (EPD) insulating coating. The EDP coating may include a polymer and an inorganic material. The first layer and the second layer may cover at least the first surface and the plurality of edges of the conductive component and the first layer may be disposed between the conductive component and the second layer. Also provided is a method of manufacturing of the electrically insulated component.