A coil device includes a winding core, a wire, and a terminal fitting. The winding core is made of a magnetic material and includes a flange. The wire is wound around the winding core. The terminal fitting is attached to a part of an outer surface of the flange. The terminal fitting includes a contact part and a protrusion plate part. The contact part is contacted with the outer surface of the flange. The protrusion plate part is formed integrally with the contact part and protrudes away from the flange. The protrusion plate part includes a wire connection surface and a main mounting surface. A lead end of the wire is connected to the wire connection surface. The main mounting surface is located opposite to the wire connection surface and is connectable to an external circuit.

A coil device includes a winding core, a wire, and a terminal fitting. The winding core is made of a magnetic material and includes a flange. The wire is wound around the winding core. The terminal fitting is attached to a part of an outer surface of the flange. The terminal fitting includes a contact part and a protrusion plate part. The contact part is contacted with the outer surface of the flange. The protrusion plate part is formed integrally with the contact part and protrudes away from the flange. The protrusion plate part includes a wire connection surface and a main mounting surface. A lead end of the wire is connected to the wire connection surface. The main mounting surface is located opposite to the wire connection surface and is connectable to an external circuit.

A coil component includes a core including a winding core portion, a first flange portion, and a second flange portion, and a plate member that is mounted on the first flange portion and the second flange portion. A distance in a height direction between the plate member and the first flange portion, or a distance in the height direction between the plate member and the second flange portion, or both vary in a length direction, or in a width direction, or both.

A coil component includes a core including a winding core portion, a first flange portion, and a second flange portion, and a plate member that is mounted on the first flange portion and the second flange portion. A distance in a height direction between the plate member and the first flange portion, or a distance in the height direction between the plate member and the second flange portion, or both vary in a length direction, or in a width direction, or both.

A preparation method for a metal matrix composite wire includes the following steps: 1) preparing a metal inner core; 2) preparing a glass-resin mixture; 3) dissolving self-adhesive resin in a solvent to prepare a self-adhesive resin solution; 4) uniformly coating the glass-resin mixture on a surface of the metal inner core, then coating the self-adhesive resin solution on a surface of the glass-resin mixture, and performing drying at a temperature of 80 C. to 150 C.; and 5) repeating the step 4) until a thickness of the glass-resin mixture plus the self-adhesive resin reaches 2 to 10 m. When an inductor is prepared by using the composite wire, the inductor may have relatively good weather resistance, a relatively good dielectric voltage-withstand capability, as well as relatively good high-temperature resistance and electrical performance.

A preparation method for a metal matrix composite wire includes the following steps: 1) preparing a metal inner core; 2) preparing a glass-resin mixture; 3) dissolving self-adhesive resin in a solvent to prepare a self-adhesive resin solution; 4) uniformly coating the glass-resin mixture on a surface of the metal inner core, then coating the self-adhesive resin solution on a surface of the glass-resin mixture, and performing drying at a temperature of 80 C. to 150 C.; and 5) repeating the step 4) until a thickness of the glass-resin mixture plus the self-adhesive resin reaches 2 to 10 m. When an inductor is prepared by using the composite wire, the inductor may have relatively good weather resistance, a relatively good dielectric voltage-withstand capability, as well as relatively good high-temperature resistance and electrical performance.

A method for manufacturing an electronic component is provided. The method includes: placing an air-core coil in a mold; placing a mixture of a metal magnetic material and a thermosetting resin into the mold so as to embed the air-core coil in the mixture; after placing the mixture, applying a 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, wherein a viscosity of the mixture is 1,000 to 1,000,000 mPa.Math.s at room temperature.

A method for manufacturing an electronic component is provided. The method includes: placing an air-core coil in a mold; placing a mixture of a metal magnetic material and a thermosetting resin into the mold so as to embed the air-core coil in the mixture; after placing the mixture, applying a 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, wherein a viscosity of the mixture is 1,000 to 1,000,000 mPa.Math.s at room temperature.

A shielded transformer winding assembly includes a first winding formed on a circuit board. The circuit board includes at least two first board alignment elements formed therein and a casing including an inner portion and one or more tabs that extend outwardly from the inner portion the tabs arranged to form a notch between them. The assembly also includes a lower winding spacer disposed in one of the tabs that includes a stepped mounting member including first and second mounting member portions. The second mounting member portion has a smaller outer perimeter than and extends from the first mounting member portion. The first winding is disposed within the casing and on the lower winding spacer such that the second mounting member portion extends through one of the at least two first board alignment elements and wherein the first printed circuit board is supported by the first mounting member portion.

A shielded transformer winding assembly includes a first winding formed on a circuit board. The circuit board includes at least two first board alignment elements formed therein and a casing including an inner portion and one or more tabs that extend outwardly from the inner portion the tabs arranged to form a notch between them. The assembly also includes a lower winding spacer disposed in one of the tabs that includes a stepped mounting member including first and second mounting member portions. The second mounting member portion has a smaller outer perimeter than and extends from the first mounting member portion. The first winding is disposed within the casing and on the lower winding spacer such that the second mounting member portion extends through one of the at least two first board alignment elements and wherein the first printed circuit board is supported by the first mounting member portion.