A coil unit may include coil holding member configured to hold a coil; and a coil held by the coil holding member and formed by a conducting wire in a wound state. A direction perpendicular to a length direction of the conducting wire is a thickness direction of the coil. The coil holding member may include an abutment surface configured to abut against one end surface in the thickness direction of the coil, a convex unit protruding from the abutment surface and around which the conducting wire is wound, and a coil pressing unit extending from a front end surface of the convex unit and configured to press the other end surface in the thickness direction of the coil.

A coil unit may include coil holding member configured to hold a coil; and a coil held by the coil holding member and formed by a conducting wire in a wound state. A direction perpendicular to a length direction of the conducting wire is a thickness direction of the coil. The coil holding member may include an abutment surface configured to abut against one end surface in the thickness direction of the coil, a convex unit protruding from the abutment surface and around which the conducting wire is wound, and a coil pressing unit extending from a front end surface of the convex unit and configured to press the other end surface in the thickness direction of the coil.

A pair of iron-based E-shaped cores 101A and 101B is disposed so that middle leg core parts 101A3 and 101B3 abut against each other, and coils 103A and 103B are respectively attached to the middle leg core parts 101A3 and 101B3 in a winding state. Furthermore, when a cross-sectional area of the middle leg core part 101A3 or 101B3 orthogonal to an extending direction thereof is Si, and a cross-sectional area of an outer leg core part 101A1, 101B1, 101A2, or 101B2 orthogonal to an extending direction thereof is So, a conditional expression (1) below holds.

1.0Si/So5.0(1)

A pair of iron-based E-shaped cores 101A and 101B is disposed so that middle leg core parts 101A3 and 101B3 abut against each other, and coils 103A and 103B are respectively attached to the middle leg core parts 101A3 and 101B3 in a winding state. Furthermore, when a cross-sectional area of the middle leg core part 101A3 or 101B3 orthogonal to an extending direction thereof is Si, and a cross-sectional area of an outer leg core part 101A1, 101B1, 101A2, or 101B2 orthogonal to an extending direction thereof is So, a conditional expression (1) below holds.

1.0Si/So5.0(1)

A magnetic-component module includes a substrate; a core on a first surface of the substrate; a spacer on the core; a winding including wire bonds extending over the core and electrically connecting a first portion of the substrate and a second portion of the substrate, and traces on and/or in the substrate; and an overmold material encapsulating the core, the spacer, and the wire bonds.

A magnetic-component module includes a substrate; a core on a first surface of the substrate; a spacer on the core; a winding including wire bonds extending over the core and electrically connecting a first portion of the substrate and a second portion of the substrate, and traces on and/or in the substrate; and an overmold material encapsulating the core, the spacer, and the wire bonds.

A coil unit may include an even number of coils comprising a first coil and a second coil; and a coil holding member which holds the even number of the coils. An outer peripheral face of the coil holding member may include a side-face pair comprising a first side face and a second side face which are substantially parallel to each other. The first side face may be formed with a first protruded part around which the first coil is wound, the first protruded part being protruded to an outer peripheral side with respect to the coil holding member. The second side face may be formed with a second protruded part around which the second coil is wound, the second protruded part being protruded to an outer peripheral side with respect to the coil holding member. The first coil and the second coil may be structured from one conducting wire.

A coil unit may include an even number of coils comprising a first coil and a second coil; and a coil holding member which holds the even number of the coils. An outer peripheral face of the coil holding member may include a side-face pair comprising a first side face and a second side face which are substantially parallel to each other. The first side face may be formed with a first protruded part around which the first coil is wound, the first protruded part being protruded to an outer peripheral side with respect to the coil holding member. The second side face may be formed with a second protruded part around which the second coil is wound, the second protruded part being protruded to an outer peripheral side with respect to the coil holding member. The first coil and the second coil may be structured from one conducting wire.

A method for manufacturing an electronic component is provided. The method includes: placing an air-core coil in a mold; placing a mixture of an FeSiCr alloy, a thermosetting resin, and a solvent into the mold so as to embed the air-core coil in the mixture; after placing the mixture, applying pressure to the placed mixture so that a shape of the placed mixture conforms to the air-core coil and the mold; and after applying the pressure, heating the mixture at a predetermined temperature for a predetermined time so that the placed mixture is hardened.

A method for manufacturing an electronic component is provided. The method includes: placing an air-core coil in a mold; placing a mixture of an FeSiCr alloy, a thermosetting resin, and a solvent into the mold so as to embed the air-core coil in the mixture; after placing the mixture, applying pressure to the placed mixture so that a shape of the placed mixture conforms to the air-core coil and the mold; and after applying the pressure, heating the mixture at a predetermined temperature for a predetermined time so that the placed mixture is hardened.