An inductor has one or more wires and a multipart magnetic core. The multipart magnetic core has magnetic core parts that are adjacent and magnetically coupled. The inductor provides an inductance of at least 40 nH for currents greater than 1 A and less than 60 A, and at least 20 nH for currents of at least 60 A.

A module includes a wiring board, an insulating layer that is laminated on the bottom surface of the wiring board, a ring-shaped coil core that is embedded in the insulating layer, a coil electrode that is wound around the coil core, electronic components that are disposed in an inner region surrounded by the coil core in the insulating layer, and an electronic component that is mounted on or in the top surface of the wiring board. With this configuration, the areas of main surfaces of the wiring board and main surfaces of the insulating layer are not large, whereas if the electronic components were mounted on or in the top surface of the wiring board, the areas of the main surfaces of the wiring board and the main surfaces of the insulating layer would be large, and a reduction in the size of the module can be facilitated.

A manufacturing method of a package includes at least the following steps. A carrier is provided. An inductor is formed over the carrier. The inductor includes a first portion, a second portion, and a third portion. The first portion is parallel to the third portion, and the second portion connects the first portion and the third portion. A die is placed over the carrier. The die is surrounded by the inductor. An encapsulant is formed between the first portion and the third portion of the inductor. The encapsulant laterally encapsulates the die and the second portion of the inductor.

A filter inductor for a power generation convertor; the filter inductor comprising a toroidal connector and a conductive winding having a first connector and a second connector positioned at each end of the winding, and wherein the conductive winding being formed from at least first and second winding segments which are connected to each other so as to form a continuous winding around the toroidal connector that extends form the first connector to the second connector.

An inductor package is described comprising a mold interconnection substrate having an embedded spiral coil inductor, a fan-out redistribution layer connected to the spiral coil inductor by a copper post wiring structure, a ferrite toroid coil in between the copper posts, and a semiconductor die mounted on the mold interconnection substrate and connected to the fan-out redistribution layer.

A coil component includes an insulating layer; an annular ring-shaped coil core embedded in the insulating layer; a coil electrode wound around the coil core; an input electrode designed for external connection, disposed on a lower surface of the insulating layer, and connected to a first end of the coil electrode; and an output electrode designed for external connection, disposed on the lower surface of the insulating layer, and connected to a second end of the coil electrode. One of the input electrode and the output electrode is disposed inside the coil core in a plan view. With this configuration, unlike a conventional coil component in which both input and output electrodes are disposed outside a coil core, it is possible not only to easily reduce the area of the coil component in a plan view, but also to improve heat dissipation characteristics of the coil component.

A powder core includes: a powder of a crystalline magnetic material; and a powder of an amorphous magnetic material, in which a median diameter D50A of the powder of the amorphous magnetic material is 15 μm or less, and satisfies the expression: 1≦D50A/D50C≦3.5 with respect to a median diameter D50C of the powder of the crystalline magnetic material.

Disclosed herein is a coil component that is surface-mountable on a substrate. The coil component includes a magnetic core, a wire wound around the magnetic core such that the coil axis direction is substantially parallel to the substrate, a terminal electrode connected to an end of the wire, and a low permeability part provided between the magnetic core and the terminal electrode. The low permeability part has a permeability lower than that of the magnetic core.

A common mode choke with extended frequency range and improved reflection in mode conversion is specified. In this case, the common mode choke has a coil with three turns, where a coupling between a first turn and a second turn is different from a coupling between the second turn and an n-th turn, and so on.

A coil electrode 4 provided in a coil component 1a includes a plurality of inner metal pins 5a arranged on an inner peripheral side of a coil core 3, a plurality of outer metal pins 5b arranged on an outer peripheral side of the coil core 3 to form a plurality of pairs with the inner metal pins 5a, a plurality of lower wiring patterns 7 that connect lower ends of the inner metal pins 5a and the outer metal pins 5b in the pairs, and a plurality of upper wiring patterns 6 that connect upper ends of the outer metal pins 5b to upper ends of inner metal pins 5a adjacent to the inner metal pins 5a that form the pairs with the outer metal pins 5b.