To provide an insulated wire that can increase in a partial discharge starting voltage, prevent deterioration of an insulator, and not cause worsening of an occupancy ratio, a coil that uses the insulated wire, a variable-thickness insulating tape used in manufacture of the insulated wire, and a manufacturing method of the same. The above-described problem is solved by an insulated wire (10) for a coil, comprising a conductor (1), and insulating coatings (2, 3) provided on an outer periphery of the conductor (1). The insulated wire (10) is constituted by the thick insulating coating (3) for an area where voltage increases and partial discharge readily occurs, and the thin insulating coating (2) for an area where the voltage does not increase and partial discharge does not readily occur, when the coil is wound. The thick insulating coating (3) and the thin insulating coating (2) are repeatedly provided at desired intervals. The above-described problem is solved by a coil (40) obtained by winding such an insulated wire (10) and configured so that the insulating coating (3) of the insulated wire (10) in an area where partial discharge readily occurs is thick, and the insulating coating (2) of the insulated wire (10) in an area where partial discharge does not readily occur is thin.

A coil component includes a body having one surface and the other surface facing each other, and having one end surface and the other end surface facing each other in one direction; a supporting substrate embedded in the body; a coil portion disposed on the supporting substrate; a first lead-out portion connected to one end of the coil portion and exposed from the body; and a second lead-out portion connected to the other end of the coil portion and exposed from the body. The coil portion has a first pattern region facing the one surface and a second pattern region facing the other surface, each of the first and second pattern regions extends in the one direction, and a distance of the first pattern region in the one direction is shorter than a distance of the second pattern region in the one direction.

A coil component includes a multilayer body including a plurality of insulating layers and a plurality of coil conductor layers which are stacked in a stacking direction, and a first via conductor and a second via conductor that electrically connect the coil conductor layers. The first via conductor is smaller than the second via conductor.

In a superconducting coil used in an MRI apparatus, it is necessary to arrange a superconducting wire at a desired position to obtain a desired coil shape in order to obtain a temporally stable static electromagnetic field with high strength and high uniformity. A superconducting coil includes a winding frame, a spacer disposed on an outer periphery of winding frame and including a winding groove having a spiral shape and a communication groove provided between winding grooves, and includes a coil group having a superconducting wire wound in winding groove. It is therefore possible to obtain superconducting coil having a desired coil shape.

Systems and methods for forming insulation on magnet wire are provided. An extruder that includes one or more rotating screws may receive a thermoset polymeric material and process the thermoset polymeric material to increase its pressure and temperature. An extrusion crosshead assembly in fluid communication with the extruder may receive the thermoset polymeric material and press extrude the thermoset polymeric material as insulation onto a magnet wire. A curing device may then cure the extruded insulation material.

Systems and methods for forming insulation on magnet wire are provided. An extruder that includes one or more rotating screws may receive a thermoset polymeric material and process the thermoset polymeric material to increase its pressure and temperature. An extrusion crosshead assembly in fluid communication with the extruder may receive the thermoset polymeric material and press extrude the thermoset polymeric material as insulation onto a magnet wire. A curing device may then cure the extruded insulation material.

Provided is a coil component that includes a coil part having a planar coil that includes a winding section and an insulating section covering the winding section, and a magnetic resin layer including a magnetic filler and configured to cover the coil part. The magnetic resin layer has a first magnetic resin layer that is in contact with the coil part and a second magnetic resin layer that is laminated on the first magnetic resin layer. The second magnetic resin layer constitutes a principal surface of the magnetic resin layer, and a maximum particle size of the magnetic filler contained in the second magnetic resin layer is larger than that of the magnetic filler contained in the first magnetic resin layer.

A transformer comprises at least two windings and each of the at least two windings includes at least one lead-out wire, and a silicone rubber heat-shrinkable sleeve is wrapped around the outer surface of the lead-out wire. The at least two windings and a portion of the silicone rubber heat-shrinkable sleeve are encapsulated in a potting box with a first potting sealant, and another portion of the silicone rubber heat-shrinkable sleeve is exposed outside of the potting box.

An electronic component includes: an element body in which a plurality of insulator layers are stacked; a coil in which a plurality of inner conductors installed in the element body are electrically connected to each other; and an outer electrode that is disposed on an outer surface of the element body, is electrically connected to the coil, and includes at least a baked electrode layer. The inner conductor connected to the outer electrode includes a connection conductor that electrically connects the baked electrode layer to the inner conductor. The connection conductor includes a protruding portion that protrudes from the outer surface of the element body to the outer electrode. The protruding portion includes a metal having a smaller diffusion coefficient than a metal of a main component included in the baked electrode layer. The inner conductors have a lower electric resistance value than the metal included in the protruding portion.

A coil electronic component includes a body comprising a magnetic material, an insulating substrate comprising a support portion disposed inside the body, and a tip extending from the support portion and exposed from an external surface of the body, a coil portion disposed on the support portion, and a lead-out portion extending from one end of the coil portion, disposed on the tip, and exposed from the external surface of the body. The lead-out portion has a slit exposed from the external surface of the body.