Embodiments of the disclosure provide an integrated circuit (IC) structure. The IC structure may include a first metal layer on a substrate, and a second metal layer on the substrate that is horizontally separated from the first metal layer. A dielectric material may include a first portion on the first metal layer, and having a first upper surface, a second portion on the second metal layer, and having a second upper surface, and a third portion on the substrate between the first metal layer and the second metal layer. The third portion of the dielectric material includes a third upper surface above the first upper surface of the first portion and the second upper surface of the second portion of the dielectric material.

Embodiments of the disclosure provide an integrated circuit (IC) structure. The IC structure may include a first metal layer on a substrate, and a second metal layer on the substrate that is horizontally separated from the first metal layer. A dielectric material may include a first portion on the first metal layer, and having a first upper surface, a second portion on the second metal layer, and having a second upper surface, and a third portion on the substrate between the first metal layer and the second metal layer. The third portion of the dielectric material includes a third upper surface above the first upper surface of the first portion and the second upper surface of the second portion of the dielectric material.

A magnetic component includes a first core, a second core, an outer bobbin, a first winding, an inner bobbin and a second winding. The outer bobbin is disposed between the first core and the second core. The outer bobbin has a hollow tube portion, a first bottom portion and a first top portion. The first winding is wound around outer side of the hollow tube portion. The inner bobbin is disposed in the hollow tube portion. The inner bobbin has a second bottom portion and a second top portion. The second winding is wound around the inner bobbin. The second bottom portion is exposed to bottom side of the first bottom portion, such that the first bottom portion overlaps the second bottom portion in a height direction of the magnetic component. The second top portion and the second bottom portion abut against inner side of the hollow tube portion.

A reactor includes a coil, an annular magnetic core that forms a closed magnetic circuit when the coil is excited, a plurality of divided reactors arranged in parallel, and a holding member that holds the plurality of divided reactors in a state in which the divided reactors are arranged in parallel at a predetermined spacing. Each of the divided reactors includes a coil unit that is formed of a wound wire and constitutes a part of the coil and a core unit that passes through the coil unit from one end of the coil unit to the other end and constitutes a part of the magnetic core. The core unit has an inner core portion inserted through the coil unit, and outer core portions that protrude from both ends of the coil unit and extend in a direction that intersects the inner core portion.

The first core includes a main body part extending in a first direction along a main surface of the substrate, a first foot part extending from the main body part to the second core through the substrate, and a second foot part extending from the main body part to the second core through the substrate at a position at which the coil conductor is sandwiched between itself and the first foot part in the first direction, and the insulating member includes a bottom wall part interposed between at least the first foot part and the second core, and a side wall part extending along at least either of the first foot part and the second foot part and interposed between either of the foot parts and the coil conductor.

The first core includes a main body part extending in a first direction along a main surface of the substrate, a first foot part extending from the main body part to the second core through the substrate, and a second foot part extending from the main body part to the second core through the substrate at a position at which the coil conductor is sandwiched between itself and the first foot part in the first direction, and the insulating member includes a bottom wall part interposed between at least the first foot part and the second core, and a side wall part extending along at least either of the first foot part and the second foot part and interposed between either of the foot parts and the coil conductor.

A manufacturing method of a transformer includes: winding a first winding wire around a bobbin, wherein two ends of the first winding wire are connected to a first and a second pin of the bobbin respectively; winding a second winding wire around the bobbin, wherein two ends of the second winding wire are connected to a third and a fourth pin of the bobbin respectively; and winding a third and a fourth winding wire in parallel around the bobbin, wherein two ends of the third winding wire are connected to the second and a fifth pin of the bobbin respectively, and two ends of the fourth winding wire are connected to the fifth and a sixth pin respectively. The first, the third and the fourth winding wires form a primary coil, and the second winding wire is a secondary coil.

A coil component includes a body; a supporting substrate embedded in the body; a coil portion including a coil pattern, and a lead-out pattern exposed to an outside of the body through an external surface of the body, and disposed on the supporting substrate and embedded in the body; and an insulating film disposed between the coil portion and the body, wherein at least a portion of the lead-out pattern contacts the body through an opening formed in the insulating film.

A coil component includes a body; a supporting substrate embedded in the body; a coil portion including a coil pattern, and a lead-out pattern exposed to an outside of the body through an external surface of the body, and disposed on the supporting substrate and embedded in the body; and an insulating film disposed between the coil portion and the body, wherein at least a portion of the lead-out pattern contacts the body through an opening formed in the insulating film.

A radio frequency (RF) weak magnetic field detection sensor includes a ferromagnetic core, a pickup coil disposed to surround the ferromagnetic core, a substrate that includes an opening, a core pad connected to the ferromagnetic core and a coil pad connected to the pickup coil, and an insulating tube interposed between the ferromagnetic core and the pickup coil. The insulating tube includes a bobbin around which the pickup coil is wound, and a core hole formed to pass through the bobbin and configured to accommodate the ferromagnetic core.