A planar transformer for power transmission, having vertical and horizontal extents, includes a circuit board having a sandwich-type structure with at least three layers to form electrical conductors. First and second layers of these layers form outer layers of the circuit board, and each additional one of these layers forms an inner layer of the circuit board. An insulation material with a minimum thickness is arranged between all of these layers, with a number of at least three mutually galvanically isolated circuits. A first circuit forms a primary circuit and each additional circuit forms an equally entitled secondary circuit, having a magnetic core assembled from two interconnected magnetic core parts. A first core part with a central part and two outer legs forms a U shape. The circuit board has two recesses, and the two outer legs of the first core part are inserted into these recesses and connected to the second core part at their ends remote from the central part. A conductor is formed on at least one of the outer layers for exactly one single circuit of the at least three circuits, and a conductor of at least one circuit of the at least three circuits is wound around a first outer leg, and conductors of at least two additional circuits of the at least three circuits are wound around the second outer leg.

An inductor bridge includes a flexible substrate and a coil defined by a conductor pattern provided on or in the flexible substrate, and connects a plurality of circuit portions. The flexible substrate includes a rigid portion and a flexible portion, the rigid portion being wider than the flexible portion. The rigid portion includes the coil and a joining portion connected to another circuit. The coil includes two coil portions located at different positions in plan view, a flexible portion is located adjacent to one side of the rigid portion, and at least two coil portions of the plurality of coil portions are located on the one side when viewed from the joining portion.

A multilayer substrate includes a stacked body including first and second flexible insulating base material layers, and an actuator conductor pattern on at least the first insulating base material layer. The stacked body includes a first region including stacked first and second insulating base material layers, and a second region including stacked second insulating base material layers. The first region includes an actuator function portion in a portion thereof, the actuator function portion including the actuator conductor pattern. The thickness of the first insulating base material layer including the actuator conductor pattern is smaller than the thickness of one second insulating base material layer.

A method of fabricating an electromagnet includes obtaining a first flexible PCB that includes one or more first conductive coiled traces and obtaining a second flexible PCB that includes one or more second conductive coiled traces. The first flexible PCB is bent into a shape having at least one curve or corner. With the first flexible PCB having been bent into the shape, the second flexible PCB is then bent into the shape: the second flexible PCB is positioned adjacent to the first flexible PCB to conform with the first flexible PCB.

The disclosure provides at least an apparatus, system and method for providing a flexible planar inductive coil, such as may be embedded in a product. The apparatus, system and method may include at least one conformable substrate, and a matched function ink set, printed onto at least one substantially planar face of the at least one substrate. This printing may form at least one layer of additive conductive traces capable of receiving current flow from at least one source and layered into successive ones of the conductive traces about a center axis within a plane of the at least one conformable substrate.

A coil includes a resin substrate, a first coil structure formed on a first surface of the resin substrate, a second coil structure formed on a second surface of the resin substrate on the opposite side with respect to the first surface such that the second coil structure is formed at a position corresponding to the first coil structure, a third coil structure formed on the second surface such that the third coil structure is positioned adjacent to the second coil structure, and a fourth coil structure formed on the first surface such that the fourth coil structure is formed at a position corresponding to the third coil structure. The resin substrate is folded such that the second coil structure and the third coil structure oppose each other.

In one embodiment, a medical device includes an instrument including a distal end configured for inserting into a body part, and a position sensor comprising a flexible printed circuit, which comprises alternating conductive and dielectric layers and is wrapped around the distal end of the instrument, the conductive layers including at least one inner layer, which is patterned with traces forming a coil, and multiple outer layers overlying the at least one inner layer and configured for connection to an electrical ground so as to shield the coil from electromagnetic interference.

An inductor bridge is provided with a flexible flat plate-shaped element body, a first connector, and a second connector. The element body includes therein an inductor portion. The inductor portion is configured by a spiral conductor pattern. The first connector is provided on the element body and is connected to a first circuit. The second connector is provided on the element body and is connected to a second circuit.

A flexible printed wiring board according to one embodiment of the present invention includes an insulating base film, a conductive pattern, laminated on at least a back surface side of the base film, and including a spiral coil pattern, and a plating layer, laminated on a back surface side of the conductive pattern, and formed by a ferromagnetic material. The conductive pattern may further include a coil core pattern that is formed on an inner side of an innermost periphery of the coil pattern.

An inductor bridge includes a flexible substrate and a coil defined by a conductor pattern provided on or in the flexible substrate, and connects a plurality of circuit portions. The flexible substrate includes a rigid portion and a flexible portion, the rigid portion being wider than the flexible portion. The rigid portion includes the coil and a joining portion connected to another circuit. The coil includes two coil portions located at different positions in plan view, a flexible portion is located adjacent to one side of the rigid portion, and at least two coil portions of the plurality of coil portions are located on the one side when viewed from the joining portion.