The invention relates to a method for producing a helical metal body (1, 1), in particular made of aluminum or an aluminum alloy. A blank is first produced in a primary shaping process, a metal forming process, or in a removal process, in particular a machining process, and one or more recesses (100, 101, 201, 202, 203) are then introduced into the blank using a removal process, said recesses defining a circumferential coil, the adjacent windings thereof being mutually spaced, in particular electrically insulated from one another.

A first layer on a substrate includes an insulator material portion adjacent an energy-reactive material portion. The energy-reactive material portion evaporates upon application of energy during manufacturing. Processing patterns the first layer to include recesses extending to the substrate in at least the energy-reactive material portion. The recesses are filled with a conductor material, and a porous material layer is formed on the first layer and on the conductor material. Energy is applied to the porous material layer to: cause the energy to pass through the porous material layer and reach the energy-reactive material portion; cause the energy-reactive material portion to evaporate; and fully remove the energy-reactive material portion from an area between the substrate and the porous material layer, and this leaves a void between the substrate and the porous material layer and adjacent to the conductor material.

An inductive sensor includes a core body, a coil wound on the core body, a cavity having a fixed volume within the core body, and an epoxy mixture filling a controlled portion of the fixed volume. The controlled portion of the fixed volume filled with the epoxy mixture controls an inductance of the sensor.

An integrated electronic component for broadband biasing that includes a monolithic substrate, a capacitor structure arranged in a trench network that extends into the substrate, and a continuous track of an electrically conducting material arranged in a crater that is formed in the substrate. The continuous track has one or several turns that have decreasing turn sections, and that are supported by a slanted peripheral wall of the crater for forming an inductor.

An inductive sensor includes a core body, a coil wound on the core body, a cavity having a fixed volume within the core body, and an epoxy mixture filling a controlled portion of the fixed volume. The controlled portion of the fixed volume filled with the epoxy mixture controls an inductance of the sensor.

An object of the present invention is to provide a coil structure capable of increasing a magnetic field generated inside an object with respect to a current flowing through a coil. The coil structure of the present invention is a coil structure in which a conducting wire is wound, and 40 to 100% of its total length is wound on a single conical surface. Preferably, an angle between a generatrix and a central axis of the single conical surface is 48? to 60?.

A resonant coil coupled with an electromagnetic field is disclosed. A Fraunhofer resonant coil includes an upper spiral element and a lower spiral element, an upper conical element connected to the upper spiral element and including one or more layers formed of a plurality of plies, a lower conical element connected to the lower spiral element and including one or more layers formed of a plurality of plies, and a feeding device connected to a gap between the upper conical element and the lower conical element and configured to supply power.

A contactless power supply coil unit includes coils wound around a center axis and a holder that holds the coils. The coils are spirally wound in plan view and overlap in an axial direction and respectively define layers stacked in the axial direction. The coils defining adjacent layers are connected in series to each other. The holder includes a core extending in the axial direction. The core includes a winding portions disposed along the axial direction. The coils are respectively wound around the winding portions. The outer diameters of the winding portions each change monotonically along the axial direction.

A processing apparatus for a maximum slot occupation (MSO) coil according to one embodiment of the present disclosure may include a jig on which a coil base material, which has an opening formed in a central portion of the coil base material in a vertical direction and is to be processed, is seated, a multi-cutter in which a plurality of blades are stacked to form horizontal slits and inclined slits in side surfaces of the coil base material seated on the jig, and a cutting tool which processes at least one of the side surfaces of the coil base material to connect the horizontal slits and the inclined slits.

A method for manufacturing a multilayer coil includes preparing a first substrate by forming a first conductor pattern on a first insulating base material layer, preparing a second substrate by forming a second conductor pattern on a second insulating base material layer, and joining a surface of the first substrate on which the first conductor pattern is formed and a surface of the second substrate on which the second conductor pattern is formed together with only a joining layer made of a thermoplastic resin interposed therebetween. Amounts of deformation of the first and second insulating base material layers are less than that of the joining layer at a fusion temperature. The first and second conductor patterns are each a coil pattern having a coil axis that extends in a lamination direction in which the first substrate and the second substrate are laminated together.