KR20160056594A - Inductor And Method Of Fabricating The Same - Google Patents

Abstract

The present invention provides an inductor which comprises: a plurality of terminal pins; a lower core having the plurality of terminal pins assembled therein, and composed of a ferromagnetic material; a first central core assembled in the lower core, and composed of the ferromagnetic material; a first wire wound around the first central core, and of which both ends are connected to the terminal pins; and an upper core assembled in the lower core by covering the first central core and the first wire, and composed of the ferromagnetic material, thereby simplifying a composition by omitting an insulating base, and reducing material costs and manufacturing costs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an inductor,

The present invention relates to an inductor, and more particularly, to an inductor in which the structure is simplified by improving the stability and efficiency by assembling a core to a lower core to which a terminal pin is assembled, and a manufacturing method thereof.

Generally, an inductor is a passive element for a winding which is used as a filter for abrupt change of current in an electronic product, an oscillation circuit, a current storage element of a power supply circuit, or the like to filter electric noise. In recent years, The inductors mounted on the surface of the printed circuit board are also becoming smaller.

The conventional inductor is composed of an insulating base to which a terminal pin is assembled, a drum core in which a wire is wound, and a ring core that surrounds the drum core. The drum core is composed of an upper and a lower flange and a heart shape integrally formed with upper and lower flanges do.

In such a conventional inductor, it is necessary to use an insulating base in order to prevent electrical short-circuiting between the terminal pin and the drum core. However, the use of the insulating base increases the complexity of the inductor and increases material cost and manufacturing cost.

In addition, since the upper and lower flanges and the heart of the drum core are integrally formed, there is a problem that the customer can not appropriately respond to material change or design change request.

Further, as the wire is exposed to the outside, there is a problem that magnetic flux of the wire flows out to cause interference to the peripheral elements or interference noise with the surrounding magnetic body.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and it is an object of the present invention to provide a method of manufacturing a semiconductor device in which a terminal pin is assembled to a lower core, And a method for producing the same.

Another object of the present invention is to provide an inductor and a method of manufacturing the inductor that can easily cope with material change or design change with respect to the core diameter by assembling the separately manufactured core wire and the lower core.

Further, the present invention is characterized in that, by allowing the lower core and the upper core having projections to surround the core wire around which the wire is wound, the outflow of magnetic flux generated in the wire is suppressed to minimize interference with peripheral devices, Another object of the present invention is to provide an inductor in which noise is prevented from being generated and heat of a wire is smoothly discharged, and a manufacturing method thereof.

In order to solve the above problems, the present invention provides a semiconductor device comprising: a plurality of terminal pins; A lower core made of a ferromagnetic material to which the plurality of terminal pins are assembled; A first heartbeat assembled to the lower core and made of a ferromagnetic material; A first wire wound around the first core and having opposite ends connected to the plurality of terminal pins; And an upper core surrounding the first core wire and the first wire and being assembled to the lower core, the upper core being made of a ferromagnetic material.

The lower core and the upper core are made of a ferrite of the Ni series and the first core is made of nickel, magnesium, iron, manganese, And may be made of one of ferrite.

A first protrusion may be formed at the center of the outer surface of the lower core, and a second protrusion may be formed at the center of the outer surface of the upper core.

A straight groove may be formed in the second projection.

The inductor further includes a second core formed of a ferromagnetic material, which is assembled to the lower core; And a second wire wound around the second core wire and having opposite ends connected to the plurality of terminal pins, the upper core surrounding the first and second core wires and the first and second wires, And can be assembled to the lower core.

The plurality of terminal pins may have a shape of a curved bar, a plurality of latching grooves may be formed at corners of the lower core, and the plurality of terminal pins may be respectively formed in the plurality of latching grooves of the lower core And both ends of each of the plurality of terminal pins are respectively protruded downwardly and laterally from the lower core and both ends of the first wire can be connected to one end of each of the plurality of terminal pins projecting laterally of the lower core .

According to another aspect of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: assembling a plurality of terminal pins into a lower core made of a ferromagnetic material; Assembling a first core made of a ferromagnetic material into the lower core in which the plurality of terminal pins are assembled; Winding a first wire on the first core wire assembled in the lower core and connecting both ends of the first wire to the plurality of terminal pins; And assembling an upper core made of a ferromagnetic material to the lower core so as to surround the first core wire and the first wire.

The manufacturing method of the inductor may further include cutting both ends of the first wire after connecting both ends of the first wire to the plurality of terminal pins.

The present invention has the effect of simplifying the structure and reducing the material cost and manufacturing cost by omitting the insulating base by assembling the terminal pin to the lower core and assembling the core to which the wire is wound to the lower core.

Further, the present invention has an effect that it is possible to easily cope with material change or design change with respect to the heart's core by assembling the separately manufactured core and lower core.

Further, the present invention is characterized in that, by allowing the lower core and the upper core having projections to surround the core wire around which the wire is wound, the outflow of magnetic flux generated in the wire is suppressed to minimize interference with peripheral devices, Noise generation is prevented and the heat of the wire is smoothly discharged.

1 is a perspective view of an inductor according to a first embodiment of the present invention;
2 is an exploded perspective view of an inductor according to a first embodiment of the present invention;
3 is a cross-sectional view of an inductor according to a first embodiment of the present invention.
4A to 4D illustrate a method of manufacturing an inductor according to a first embodiment of the present invention.
5 is a perspective view of an inductor according to a second embodiment of the present invention.
6 is an exploded perspective view of an inductor according to a third embodiment of the present invention.

Hereinafter, an inductor and a manufacturing method thereof according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of an inductor according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of an inductor according to a first embodiment of the present invention.

1 and 2, the inductor 10 according to the first embodiment of the present invention includes a plurality of terminal pins 20, a lower core 30 to which a plurality of terminal pins 20 are assembled, A core 50 assembled to the lower core 30, a wire 50 wound around the core 40, and an upper core 60 wrapped around the wire 50 and assembled to the lower core 30.

The plurality of terminal pins 20 are connected to the wires 50 to supply current. For example, the terminal pins 20 may be formed in four corners corresponding to the corners of the lower core 30. In this case, the two terminal pins 20 serve as a support for maintaining the inductor 10 horizontal while supplying current to the inductor 10, and the remaining two terminal pins 20 maintain the inductor 10 horizontal It is possible to make it serve only as a support.

The plurality of terminal pins 20 may have the shape of a curved bar having a circular or polygonal cross section. For example, the plurality of terminal pins 20 may be formed of a conductive metal material such as aluminum Lt; / RTI >

The lower core 30 serves to minimize the flux of the wire 50 wound on the core 40 along with the upper core 60 to the outside, And serves as an insulating base.

To this end, the lower core 30 may be formed of a ferromagnetic material, and a material having a relatively high resistance may be used to prevent electrical shorting between the plurality of terminal pins 20 through the lower core 30. [ The lower core 30 can be formed. For example, the lower core 30 may be made of nickel (Ni) -based ferrite.

The lower core 30 may be formed in a polygonal plate shape. A first protrusion (32 in FIG. 3) may be formed at the center of the outer surface of the lower core 30, A plurality of engaging grooves 34 for the pins 20 can be formed.

The plurality of terminal pins 20 are respectively assembled to the plurality of engaging grooves 34 of the lower core 30 and the opposite ends of each of the plurality of terminal pins 20 protrude downward and laterally from the lower core 30, .

The first projecting portion 32 of the lower core 30 increases the cross sectional area of the lower core 30 to smooth the flow of the magnetic flux and increases the outer surface area of the lower core 30, And also serves as a conventional insulative base for maintaining the inductor 10 at a certain distance from the printed circuit board. In the first embodiment, the first protruding portion 32, which is circular, However, in another embodiment, the first projection 32 may be formed in a polygonal shape, and the projection height of the first projection 32 may be variously changed.

Thus, the magnetic flux leakage is minimized by the lower core 30 to secure a stable self-circulation structure, and a plurality of terminal pins 20 are assembled to the lower core 30 and the insulating base is omitted, The configuration can be simplified, and the material cost and manufacturing cost can be reduced.

The core 40 controls the magnetic flux of the wound wire 50 and increases the inductance. The core 40 may have a columnar or polygonal cross section. For example, the core 40 may be made of a ferromagnetic material such as nickel (Ni), magnesium (Mg), iron (Fe), manganese (Mn), or ferrite.

The core 40 is manufactured separately from the lower core 30 and the upper core 60 and then assembled at the center of the upper surface of the lower core 30 using an adhesive such as epoxy or the like, The core 40 may be formed of a material different from that of the upper core 30 and the upper core 60.

That is, even when the material or shape design of the core 40 is changed in accordance with the customer's material change or design change request or use, the lower core 30 and the upper core 60 are manufactured in the same manner, Is assembled to the lower core (30), it is possible to easily cope with material change or design change.

The wire 50 is wound around the core 40 and both ends of the wire 50 are connected to one end of each of the plurality of terminal pins 20 projecting laterally. For example, the wire 50 may be formed of a wire coated with an insulating material such as an enamel copper wire.

The upper core 60 serves to minimize the outflow of the magnetic flux of the wire 50 wound around the core 40 along with the lower core 30 to the upper surface of the core 40 and the wire 50, The wire 50 wound around the core 40 is completely enclosed by the lower core 30 and the upper core 60. The lower core 30 and the upper core 60 are connected to each other.

To this end, the upper core 60 may be formed of a ferromagnetic material, and in order to prevent electrical shorting between the plurality of terminal pins 20 through the upper core 60, a material having a relatively high resistance The upper core 60 can be formed. For example, the upper core 60 may be made of nickel-based ferrite.

The upper core 60 may have a hexahedron shape having an open bottom, and a second protrusion 62 may be formed at the center of the upper surface.

The second protrusions 62 of the upper core 60 increase the sectional area of the upper core 60 to smooth the flow of the magnetic flux and increase the outer surface area of the upper core 60 to occur in the wire 50 The second protrusions 62 may be formed in a polygonal shape in another embodiment, and the second protrusions 62 may be formed in a polygonal shape in the first embodiment, The protrusion height of the protrusion 62 can be variously changed.

3 is a cross-sectional view of an inductor according to a first embodiment of the present invention.

3, the lower core 30 and the upper core 60 are assembled so as to completely enclose the wire 50 wound on the core 40. As a result, by applying a current to the wire 50 The generated magnetic field B is limited to a space formed by the assembled lower core 30 and the upper core 60 so that flux leakage to the outside is suppressed and minimized.

Therefore, the inductor 10 has a stable self-circulating structure, which improves the current characteristics, minimizes the interference to the peripheral elements of the inductor 10, and prevents generation of noise due to interference with the peripheral magnetic body.

The first and second protrusions 32 and 62 are formed in the lower core 30 and the upper core 60 to smoothly flow the magnetic flux generated in the wire 50 and generate Heat can be released smoothly.

4A to 4D illustrate a method of manufacturing an inductor according to a first embodiment of the present invention.

4A, a plurality of terminal pins 20 are assembled in a plurality of engagement grooves 34 of the lower core 30. At this time, both ends of each of the plurality of terminal pins 20 are connected to the lower core 30 As shown in Fig.

The lower core 30 can be manufactured through a mold and a plurality of terminal pins 20 can be assembled to the lower core 30 by using an automatic terminal pin assembly by applying a breakage prevention design to a plurality of engagement grooves 34 .

The core 40 is assembled to the lower core 30 in which a plurality of terminal pins 20 are assembled by using an adhesive such as an epoxy or the like as shown in FIG. 30).

A hook (not shown) may be formed on the upper surface of the lower core 30 so as to align the stem 40 with a proper position. (40) can be assembled to the lower core (30).

The lower core 30 and the core 40 may be made of different materials. For example, the lower core 30 may be made of nickel-based ferrite and the core 40 may be made of Ni ), Magnesium (Mg), iron (Fe), manganese (Mn), ferrite and the like.

As described above, it is possible to easily cope with material change or design change by forming the core 40 with a material different from that of the lower core 30 by use or request, or by forming the core 40 differently for each model.

The wire 50 is wound around the core wire 40 assembled in the lower core 30 so that both ends of the wire 50 are projected laterally of each of the plurality of terminal pins 20 immediately after the winding And both ends of the wire 50 can be cut.

That is, the wire 50 is wound around the core 40 using an automatic winding machine, both ends of the wound wire 50 are connected to a plurality of terminal pins 20, and both ends of the wire 50 are cut Thus, the productivity can be maximized.

The upper core 60 is assembled to the lower core 30 in which the core 40 and the wire 50 are assembled by attaching the upper core 60 using an adhesive such as epoxy, The upper core 60 can be assembled to the lower core 30 by assembling the upper core 60 to the lower core 30 or by using an improved fixing means such as a screw.

In another embodiment, grooves for alignment and heat dissipation may be formed in the upper core, which will be described with reference to the drawings.

5 is a perspective view of an inductor according to a second embodiment of the present invention. The inductor according to the second embodiment is the same as the inductor according to the first embodiment except for the linear groove of the upper core, Is omitted.

5, a straight groove 164 is formed in the second projection 162 of the upper core 160 of the inductor 110 according to the second embodiment of the present invention.

The straight groove 164 serves as a reference for aligning the upper core 160 in the process of assembling the inductor 110 and enhances the heat radiating effect by enlarging the outer surface area of the upper core 160.

The direction and width of the straight groove 164 can be variously changed.

5 shows that only one straight groove 164 is formed. However, in another embodiment, two or more straight grooves 164 may be formed in the second protrusion 162 of the upper core 160 to align and radiate heat .

On the other hand, in another embodiment, two or more heart cores may be assembled between one lower core and the upper core, which will be described with reference to the drawings.

6 is an exploded perspective view of the inductor according to the third embodiment of the present invention, and a description of the same parts as those of the first embodiment will be omitted.

6, the inductor 210 according to the third embodiment of the present invention includes a plurality of terminal pins 220, a lower core 230 to which a plurality of terminal pins 220 are assembled, First and second wires 250 and 252 wound on the first and second core wires 240 and 242 and the first and second core wires 240 and 242 assembled to the first and second wires 230 and 230, And an upper core 260 that surrounds the upper and lower cores 250 and 252 and is assembled to the lower core 230.

The plurality of terminal pins 220 are connected to the first and second wires 250 and 252 to supply electric current. For example, the terminal pins 220 may be connected to the four corners of the lower core 230, Can be formed. In this case, the two terminal pins 220 serve as a support for maintaining the level of the inductor 210 while supplying current to the first wire 250, and the remaining two terminal pins 220 serve as a support for holding the second wire 252, So that the inductor 210 maintains the level of the inductor 210.

The lower core 230 serves to minimize the outflow of the magnetic fluxes of the first and second wires 250 and 252 wound around the first and second core pieces 240 and 242 together with the upper core 260 And serves as an insulating base to which a plurality of terminal pins 220 are fixed.

The lower core 230 may be formed in the shape of a polygonal plate and two first protrusions (not shown) may be formed on the outer surface of the lower core 230, And a plurality of latching grooves 234 for the latches 220 can be formed.

The plurality of terminal pins 220 are respectively assembled to the plurality of engagement grooves 234 of the lower core 230 and the opposite ends of each of the plurality of terminal pins 220 protrude downward and laterally from the lower core 230, .

The two first projections of the lower core 230 increase the sectional area of the lower core 230 to smooth the flow of the magnetic flux and increase the outer surface area of the lower core 230, And serves as a conventional insulative base which keeps the inductor 210 at a certain distance from the printed circuit board while smoothly discharging heat generated from the printed circuit boards 250 and 252.

The first and second core pieces 240 and 242 serve to manage the magnetic flux of the wound first and second wires 250 and 252 and to increase the inductance, respectively.

The first and second core pieces 240 and 242 are manufactured separately from the lower core 230 and the upper core 260 and then assembled on the upper surface of the lower core 230 using an adhesive such as epoxy So that the first and second core points 240 and 242 can be formed of a material different from that of the lower core 230 and the upper core 260.

That is, even when the material or shape design of the first and second core members 240, 242 is changed according to the customer's material change or design change request or use, the lower core 230 and the upper core 260 are equally By fabricating and manufacturing the modified core (240) on the lower core (230), it is possible to easily cope with material change or design change.

Also, the first and second heart shapes 240 and 242 may be formed of different materials as necessary.

The first and second wires 250 and 252 are wound on the first and second core wires 240 and 242 respectively and both ends of the first and second wires 250 and 252 are wound around the terminal pins 220 As shown in Fig.

The upper core 260 serves to minimize the outflow of the magnetic flux of the first and second wires 250 and 252 wound around the first and second crown rods 240 and 242 together with the lower core 230 And is assembled to the lower core 230 by wrapping the upper and lower surfaces of the first and second core wires 240 and 242 and the first and second wires 250 and 252, The first and second wires 250 and 252 wound on the first and second wires 240 and 242 are completely surrounded by the lower core 230 and the upper core 260, respectively.

The upper core 260 may have a hexahedron shape having an open bottom, and two second protrusions 262 are formed on the upper surface thereof.

The two second protrusions 262 of the upper core 260 increase the cross sectional area of the upper core 260 to smooth the flow of the magnetic flux and increase the outer surface area of the upper core 260, And smoothly discharges heat generated from the second wires (250, 252).

Although not shown, the second protrusions 262 of the upper core 260 may be formed with straight grooves for alignment and heat radiation.

In the inductor 210 according to the third embodiment of the present invention, the pair of the lower core 230 and the upper core 260 are connected to the first and second cusps 240 and 242 and the first and second wires 250 And 252 are enclosed, the material cost can be reduced, and the size of the inductor 210 can be reduced to make the circuit configuration easier.

At this time, the first and second wires 250 and 252 can operate as two independent inductors.

As described above, in the inductor according to the embodiment of the present invention, it is possible to omit the insulating base by directly assembling the terminal pin to the lower core, fabricating the core having the wire wound thereon separately from the lower core, As a result, the configuration of the inductor is simplified, the size is reduced, and the material cost and manufacturing cost are reduced.

By forming a core with a material different from that of the lower core and assembling the core and the lower core separately, the core and the upper core can have high dielectric strength and high magnetic seal characteristics, It is possible to easily cope with material change or design change with respect to the heart.

Further, by forming projections and straight grooves in the lower core and the upper core, the magnetic flux generated in the wire can smoothly flow, the heat of the wire can be smoothly discharged, and the manufacturing process can be simplified.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It can be understood that

10: inductor 20: terminal pin
30: Lower core 40:
50: wire 60: upper core

Claims (8)

A plurality of terminal pins;
A lower core made of a ferromagnetic material to which the plurality of terminal pins are assembled;
A first heartbeat assembled to the lower core and made of a ferromagnetic material;
A first wire wound around the first core and having opposite ends connected to the plurality of terminal pins;
And an upper core, which is made of a ferromagnetic material, is wound around the first core wire and the first wire,
/ RTI >
The method according to claim 1,
Wherein the lower core and the upper core are made of a ferrite of the Ni series and the first core is made of at least one selected from the group consisting of nickel (Ni), magnesium (Mg), iron (Fe), manganese (Mn) ferrite).
The method according to claim 1,
A first protrusion is formed at the center of the outer surface of the lower core, and a second protrusion is formed at the center of the outer surface of the upper core.
The method of claim 3,
And the second protrusion is formed with a straight groove.
The method according to claim 1,
A second heartbeat assembled to the lower core and made of a ferromagnetic material;
A second wire wound around the second core wire and having opposite ends connected to the plurality of terminal pins,
Further comprising:
Wherein the upper core surrounds the first and second core wires and the first and second wires and is assembled to the lower core.
The method according to claim 1,
Wherein the plurality of terminal pins each have a curved bar shape,
A plurality of latching grooves are formed at corners of the lower core,
Wherein the plurality of terminal pins are respectively assembled to the plurality of latching grooves of the lower core such that both ends of each of the plurality of terminal pins protrude downward and laterally from the lower core,
And both ends of the first wire are connected to ends of the plurality of terminal pins projecting laterally of the lower core.
Assembling a plurality of terminal pins into a lower core made of a ferromagnetic material;
Assembling a first core made of a ferromagnetic material into the lower core in which the plurality of terminal pins are assembled;
Winding a first wire on the first core wire assembled in the lower core and connecting both ends of the first wire to the plurality of terminal pins;
Assembling an upper core made of a ferromagnetic material to the lower core so as to surround the first core wire and the first wire
Wherein the inductor is made of a metal.
8. The method of claim 7,
Further comprising cutting both ends of the first wire after connecting both ends of the first wire to the plurality of terminal pins.

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