The present disclosure relates to a coil assembly. According to a first embodiment of the present disclosure, there is provided a coil assembly including a coil including a multilayer film which is extended between a first longitudinal end and a second longitudinal end of the multilayer film, which are opposite to each other, and which is wound to form a plurality of loops which are substantially concentric, wherein the multilayer film includes: cut edges which are extended between the first longitudinal end and the second longitudinal end, and are opposite to each other and are substantially parallel to each other; a metal layer; and a magnetic layer disposed on the metal layer, wherein, at one or more of the first longitudinal end and the second longitudinal end of the multilayer film, the metal layer is electrically connected to a conductive terminal.

According to one configuration, a fabricator fabricates a core of a circuit component to include magnetic permeable material. The fabricator further produces the circuit component to include multiple electrically conductive paths extending through the core of the magnetic permeable material. In one arrangement, the multiple electrically conductive paths include a first electrically conductive path and a second electrically conductive path. The fabricator fabricates the circuit component and, more specifically, the core of the magnetic permeable material to include at least one cutaway portion operative to reduce inductive coupling between the first electrically conductive path and the second electrically conductive path disposed in the core.

According to one configuration, a fabricator fabricates a core of a circuit component to include magnetic permeable material. The fabricator further produces the circuit component to include multiple electrically conductive paths extending through the core of the magnetic permeable material. In one arrangement, the multiple electrically conductive paths include a first electrically conductive path and a second electrically conductive path. The fabricator fabricates the circuit component and, more specifically, the core of the magnetic permeable material to include at least one cutaway portion operative to reduce inductive coupling between the first electrically conductive path and the second electrically conductive path disposed in the core.

An electronic component includes a body having a side surface, coil conductor layers wound along main surfaces parallel to the side surface, and capacitor conductor layers each having a substantially plate-like shape parallel to the side surface. The coil conductor layers and the capacitor conductor layers are arranged in a widthwise direction perpendicular to the side surface. The capacitor conductor layers include first and second capacitor conductor layers adjacent to each other in the widthwise direction. The coil conductor layers include a first coil conductor layer that is in the same layer as the first capacitor conductor layer and a second coil conductor layer that is in the same layer as the second capacitor conductor layer. The shortest distance between the first coil conductor layer and the first capacitor conductor layer is larger than the shortest distance between the second coil conductor layer and the second capacitor conductor layer.

A multi-layer coil structure and an inductor are provided. The multi-layer coil structure includes a first coil body and a second coil body. The first coil body includes a first extension portion and a second extension portion extending in a first direction, and at least one third extension portion extending in a second direction. The second coil body includes a fourth extension portion, a fifth extension portion, and at least one sixth extension portion, the fourth extension portion and the fifth extension portion extend in the first direction, and the at least one sixth extension portion extend in the second direction. When the first coil body is detachably assembled with the second coil body, at least one first pin is formed by the first extension portion and the fourth extension portion, and at least one second pin is formed by the second extension portion and the fifth extension portion.

A multi-layer coil structure and an inductor are provided. The multi-layer coil structure includes a first coil body and a second coil body. The first coil body includes a first extension portion and a second extension portion extending in a first direction, and at least one third extension portion extending in a second direction. The second coil body includes a fourth extension portion, a fifth extension portion, and at least one sixth extension portion, the fourth extension portion and the fifth extension portion extend in the first direction, and the at least one sixth extension portion extend in the second direction. When the first coil body is detachably assembled with the second coil body, at least one first pin is formed by the first extension portion and the fourth extension portion, and at least one second pin is formed by the second extension portion and the fifth extension portion.

An inductor component includes a main body formed in a flat-plate shape and including a magnetic layer; an inductor wiring line disposed on a plane inside the main body; a first vertical wiring line that extends, from a pad portion which is an end portion of the inductor wiring line, in a first direction to pass through the inside of the main body, and is exposed on a first principal surface side of the main body; a second vertical wiring line that extends, from the pad portion of the inductor wiring line, in a second direction to pass through the inside of the main body, and is exposed on a second principal surface side of the main body; and an insulation layer of a non-magnetic body. The first vertical wiring line includes a via conductor and a columnar wiring line. The second vertical wiring line includes a columnar wiring line.

New types of circuit elements for integrated circuits include structures wherein a thickness dimension is much greater than a width dimension and is more closely spaced than the width dimension in order to attain a tight coupling condition. The structure is suitable to form inductors, capacitors, transmission lines and low impedance power distribution networks in integrated circuits. The width dimension is on the same order of magnitude as skin depth. Embodiments include a spiral winding disposed in a silicon substrate formed of a deep, narrow, conductor-covered spiral ridge separated by a narrow spiral trench. Other embodiments include a wide, thin conductor formed in or on a flexible insulative ribbon and wound with turns adjacent one another, or a conductor in or on a flexible insulative sheet folded into layers with windings adjacent one another Further, a method of manufacture includes directional etching of the deep, narrow spiral trench to form a winding in silicon.

A reactor includes a coil, a magnetic core having an inner core portion inside a winding portion, and an inner interposed member insulating the winding portion from the inner core portion. The inner interposed member includes a thin portion with a small thickness formed by a recess, and a thick portion with a thickness larger than that of the thin portion. The inner core portion includes a core-side projecting portion with a shape conforming to a shape of the inner peripheral face of the thin portion. The thickness of the thin portion is 0.2 mm or more and 1.0 mm or less, and the thickness of the thick portion is 1.1 mm or more and 2.5 mm or less. Clearances are in part of a portion between the inner core portion and the inner interposed member and of a portion between the inner interposed member and the winding portion.

A reactor includes a coil, a magnetic core having an inner core portion inside a winding portion, and an inner interposed member insulating the winding portion from the inner core portion. The inner interposed member includes a thin portion with a small thickness formed by a recess, and a thick portion with a thickness larger than that of the thin portion. The inner core portion includes a core-side projecting portion with a shape conforming to a shape of the inner peripheral face of the thin portion. The thickness of the thin portion is 0.2 mm or more and 1.0 mm or less, and the thickness of the thick portion is 1.1 mm or more and 2.5 mm or less. Clearances are in part of a portion between the inner core portion and the inner interposed member and of a portion between the inner interposed member and the winding portion.