The coil comprises a coil carrier, a coil wire at least partially surrounded by an insulating layer and wound around the coil carrier, as well as a protective cover layer at least partially covering the coil wire wound around the coil carrier. The coil wire is composed, at least partially, of silver, the insulating layer surrounding the coil wire is composed, at least partially, of a ceramic material, and the protective cover layer is composed, at least partially, of a ceramic material and/or a glass.

The coil comprises a coil carrier, a coil wire at least partially surrounded by an insulating layer and wound around the coil carrier, as well as a protective cover layer at least partially covering the coil wire wound around the coil carrier. The coil wire is composed, at least partially, of silver, the insulating layer surrounding the coil wire is composed, at least partially, of a ceramic material, and the protective cover layer is composed, at least partially, of a ceramic material and/or a glass.

A mother substrate that enables winding cores to be obtained in a manner in which the mother substrate is divided along x-direction division lines and y-direction division lines is prepared. Subsequently, x-direction division grooves are formed along the x-direction division lines on a first main surface of the mother substrate, y-direction division grooves are formed along the y-direction division lines on the first main surface, and shallow bottom surface exposure grooves, for exposing surfaces that are to be core portion bottom surfaces, are formed on the first main surface. The mother substrate is divided by performing a flattening process on a second main surface of the mother substrate that is opposite the first main surface until the second main surface reaches the x-direction division grooves and the y-direction division grooves to obtain the winding cores that are separated from each other.

A common mode choke coil includes a core having a winding core part and a first and second wire wound around the winding core part. The winding core part has a first winding region, a switching region and second winding regions in this order along the axis of the winding core part. In the first winding region, each turn of the first wire is located closer to a first end portion of the winding core part than the corresponding same-numbered turn of the second wire. In the second winding region, each turn of the first wire is located closer to a second end portion of the winding core part than the corresponding same-numbered turn of the second wire. The number of turns of the first and second wires in the first winding region differs from the number of turns of the first and second wires in the second winding region.

A common mode choke coil includes a core having a winding core part and a first and second wire wound around the winding core part. The winding core part has a first winding region, a switching region and second winding regions in this order along the axis of the winding core part. In the first winding region, each turn of the first wire is located closer to a first end portion of the winding core part than the corresponding same-numbered turn of the second wire. In the second winding region, each turn of the first wire is located closer to a second end portion of the winding core part than the corresponding same-numbered turn of the second wire. The number of turns of the first and second wires in the first winding region differs from the number of turns of the first and second wires in the second winding region.

A wire wound-type inductor is a chip type and includes a core including a winding core part having a substantially taper-shaped portion and flange portions, a winding wire that is coated with an electrically insulating coating film, terminal electrodes to which respective end portions of the winding wire are connected, and a resistive conductor containing conductive powder. The core is made of ceramics and the resistive conductor is arranged so as to cover at least a part of the surrounding of an outer side portion of the winding wire.

A wire wound-type inductor is a chip type and includes a core including a winding core part having a substantially taper-shaped portion and flange portions, a winding wire that is coated with an electrically insulating coating film, terminal electrodes to which respective end portions of the winding wire are connected, and a resistive conductor containing conductive powder. The core is made of ceramics and the resistive conductor is arranged so as to cover at least a part of the surrounding of an outer side portion of the winding wire.

A wire wound-type inductor is a chip type and includes a core including a winding core part having a substantially taper-shaped portion and flange portions, a winding wire that is coated with an electrically insulating coating film, terminal electrodes to which respective end portions of the winding wire are connected, and a resistive conductor containing conductive powder. The core is made of ceramics and the resistive conductor is arranged so as to cover at least a part of the surrounding of an outer side portion of the winding wire.

A wire wound-type inductor is a chip type and includes a core including a winding core part having a substantially taper-shaped portion and flange portions, a winding wire that is coated with an electrically insulating coating film, terminal electrodes to which respective end portions of the winding wire are connected, and a resistive conductor containing conductive powder. The core is made of ceramics and the resistive conductor is arranged so as to cover at least a part of the surrounding of an outer side portion of the winding wire.

A common mode choke coil includes a core having a winding core part and a first and second wire wound around the winding core part. The winding core part has a first winding region, a switching region and second winding regions in this order along the axis of the winding core part. In the first winding region, each turn of the first wire is located closer to a first end portion of the winding core part than the corresponding same-numbered turn of the second wire. In the second winding region, each turn of the first wire is located closer to a second end portion of the winding core part than the corresponding same-numbered turn of the second wire. The number of turns of the first and second wires in the first winding region differs from the number of turns of the first and second wires in the second winding region.