KR20170090729A - Coil component - Google Patents

Abstract

The present invention provides a coil component which comprises: a body in which a plurality of coil units are arranged inside the body; and first to third external electrodes connected to the coil unit. The plurality of coil units includes: a first coil unit having a lead exposed to a first surface of the body; a second coil unit having a lead exposed to a second surface facing the first surface; and two or more third coil units exposed to a third surface.

Description

Coil component {Coil component}

The present invention relates to a coil component.

An inductor, which is one of the coil components, is a typical passive element that removes noise by forming an electronic circuit together with a resistor and a capacitor. The inductor is a passive element that amplifies a signal of a specific frequency band in combination with a capacitor using electromagnetic characteristics. And is used in a configuration such as a filter circuit.

In recent years, there has been an increasing demand for downsizing and slimming of coil parts.

However, it is becoming difficult to realize high inductance and high direct current superimposition characteristics depending on the miniaturized volume.

The inductor mainly uses a via for interlayer connection of the coil part.

The pad size of the via is generally larger than the width of the coil for the matching of the upper and lower coils, resulting in a decrease in the area of the coil.

That is, in the conventional inductor product, since the via is located inside the body for interlayer connection of the coil part, it is inevitable to reduce the area of the coil, thereby realizing a high inductance product.

Japanese Patent Application Laid-Open No. 2006-278479

The present invention is to provide a coil part that meets the requirements of miniaturization and high capacity.

An embodiment of the present invention is a body including a body having a plurality of coil portions disposed therein and first to third external electrodes disposed on an outer peripheral surface of the body and connected to the coil portion, A first coil portion having a lead exposed to a first surface, a second coil portion having a lead exposed to a second surface facing the first surface, and a coil composed of two or more third coil portions exposed to a third surface Provide parts.

According to another aspect of the present invention, there is provided a plasma processing apparatus including a body having a plurality of coil portions disposed therein, and first to fourth external electrodes disposed on an outer peripheral surface of the body and connected to the coil portion, A first coil part having a lead exposed to the first surface, a second coil part having a lead exposed to the second surface facing the first surface, and a third surface exposed to the first surface and the second surface, At least two third coil parts and at least two fourth coil parts exposed to a fourth side facing the third side.

According to the embodiment of the present invention, by realizing the interlayer connection of the coil portion by using the external electrode, it is possible to realize a high inductance by securing the internal area of the cutting margin or by increasing the number of coil turns of the coil portion.

In addition, since an array type external electrode can be realized, there is no influence on the size of the coil component, and a high inductance can be realized even if the size is the same as that of the conventional coil component.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an external electrode and a body of a coil component according to an embodiment of the present invention. FIG.
2 is an exploded perspective view of FIG.
3 is an exploded perspective view according to another embodiment of Fig.
4 is a perspective view showing an external electrode and a body of a coil component according to another embodiment of the present invention.
5 is an exploded perspective view of Fig.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.

Furthermore, embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clarity of description, and the elements denoted by the same reference numerals in the drawings are the same elements.

Coil parts

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an external electrode and a body of a coil component according to an embodiment of the present invention. FIG.

1, a coil component 100 according to an embodiment of the present invention includes a body 50 having a plurality of coil parts 41, 42, and 43 disposed therein, And first to third external electrodes 81, 82, 83 connected to the coil portions 41, 42, 43.

The body 50 may have a roughly hexahedral shape, and L, W, and T shown in FIG. 1 indicate the longitudinal direction, the width direction, and the thickness direction, respectively.

The body 50 may include a first surface and a second surface opposed to each other in the longitudinal direction, a third surface and a fourth surface opposed in the width direction, and a fifth surface and a sixth surface opposed to each other in the thickness direction. The body 50 may have a rectangular parallelepiped shape whose length in the longitudinal direction is greater than the length in the width direction.

The body 50 forms an outer appearance of the coil component 100 and may be formed by filling a magnetic material showing magnetic characteristics.

The magnetic material is not limited as long as it exhibits magnetic properties, and may be, for example, ferrite or a metal-based soft magnetic material.

The ferrite may include ferrite such as Mn-Zn ferrite, Ni-Zn ferrite, Ni-Zn-Cu ferrite, Mn-Mg ferrite, Ba ferrite or Li ferrite.

The soft magnetic material may be an alloy including at least one selected from the group consisting of Fe, Si, Cr, Al and Ni, and may include, for example, Fe-Si-B-Cr amorphous metal particles But is not limited thereto.

The metal-based soft magnetic material may have a particle diameter of 0.1 to 20 μm and may be dispersed on a polymer such as an epoxy resin or polyimide.

The thickness of the body 50 may be 1.2 mm or less, but it is not limited thereto and may be manufactured in various thicknesses.

The coil part according to an embodiment of the present invention is disposed on the outer circumferential surface of the body 50 and includes first to third external electrodes 81 to 82 connected to the coil parts 41, ).

The first and second external electrodes 81 and 82 may be formed of a metal having excellent electrical conductivity and may be formed of a metal such as silver (Ag), copper (Cu), nickel (Ni), aluminum (Al) Or the like.

Hereinafter, the coil portions 41, 42, 43 and the first to third external electrodes 81, 82, 83 will be described.

2 is an exploded perspective view of FIG.

2, the plurality of coil parts 41, 42 and 43 includes a first coil part 41 having a lead 41 'exposed to the first surface of the body 50, A second coil portion 42 having a lead 42 'exposed to a second surface facing the first coil portion 42 and two or more third coil portions 43 exposed to the third surface.

One end of each of the first and second coil portions 41 and 42 is connected to a lead 41 'and 42', respectively, which are exposed to a first surface of the body 50 and a second surface facing the first surface, And the other end is connected to the other end portion of one of the third coil portions 43 in the body 50 via vias 45. [

Specifically, the other end of the first coil part 41 may be connected to the other end of the one of the third coil parts 43 by a via 45.

Likewise, the other end of the second coil portion 42 may be connected to the other end of the one of the third coil portions 43 by a via 45.

The third coil part 43 is disposed in the body and exposed to the third surface of the body 50.

In FIG. 2, two third coil portions 43 are arranged, but the present invention is not limited thereto, and three or more third coil portions 43 may be disposed.

The two or more third coil portions 43 exposed to the third surface of the body 50 may be electrically connected by a third external electrode 83 disposed on the third surface, .

According to the embodiment of the present invention, unlike the conventional coil part, the interlayer connection of the third coil part 43 is realized by using the external electrode 83, so that the internal area of the cutting margin can be secured, Inductance can be implemented.

In addition, since an array type external electrode can be realized, there is no influence on the size of the coil component, and a high inductance can be realized even if the size is the same as that of the conventional coil component.

An insulating layer 11 may be disposed between each of the plurality of coil portions 41, 42, and 43.

The insulating layer 11 basically electrically insulates the coil portions formed on the different layers.

In the insulating layer 11, vias 45 are formed, through which the coil portions formed in the different layers are electrically connected.

The material of the insulating layer 11 may be any material including an insulating material. For example, a resin impregnated with a reinforcing material such as a glass fiber or an inorganic filler, for example, a prepreg may be used, and a conventional thermosetting resin and / or photo-curable resin, which may or may not include a reinforcing material, Up film may be used.

In addition, a known positive type or negative type photosensitive resin may be used. However, the present invention is not limited thereto.

The via 45 formed in the insulating layer 11 includes a metal having excellent electrical conductivity and is formed of a metal such as silver (Ag), palladium (Pd), aluminum (Al), nickel (Ni) , Gold (Au), copper (Cu), platinum (Pt), or an alloy thereof, but is not limited thereto.

The shape and size of the vias are not particularly limited, and can be variously applied according to design specifications.

The first to third coil portions 41, 42 and 43 may include at least one selected from the group consisting of gold, silver, platinum, copper, nickel, palladium, and alloys thereof.

The first to third coil portions 41, 42, and 43 may be made of a material capable of imparting conductivity to the coil, and are not limited to the metals listed above.

The first to third coil portions 41, 42, and 43 may be polygonal, circular, elliptical, or irregular, and there is no particular limitation on the shape.

The first coil part and the second coil part 41 and 42 may be connected to the first and second external electrodes 81 and 82 through leads, respectively.

The first and second external electrodes 81 and 82 may be formed on the side of the body 50 in the longitudinal direction (" L direction ").

The first and second external electrodes 81 and 82 may be separated from each other and electrically separated from each other.

The first and second external electrodes 81 and 82 may extend to a top surface and a bottom surface of the body 50, respectively.

The first external electrode 81 may be used as an input terminal, and the second external electrode 82 may be used as an output terminal.

The two or more third coil portions 43 exposed on the third surface of the body 50 may be electrically connected by a third external electrode 83 disposed on the third surface.

The third external electrode 83 may be formed on the side of the body 50 in the width direction (" W direction ").

The third external electrode 83 may extend to a top surface and a bottom surface of the body 50.

The third external electrode 83 may be processed by a No Contact terminal when mounted on a printed circuit board.

3 is an exploded perspective view according to another embodiment of Fig.

Referring to FIG. 3, the plurality of coil portions 41, 42, and 43 'may include two or more third coil portions 43' exposed to the third surface of the body 50.

The number of turns of the third coil part 43 'may be the same as the number of turns of the first and second coil parts 41 and 42.

In the case of the conventional coil component, the coil portion disposed inside the body of the coil portion connected to the via is connected to the vias at both ends, so that the number of turns is smaller than the number of turns of the coil portion having one end exposed to the outside There is a problem that the inductance can not be increased.

However, according to an embodiment of the present invention, the number of turns of the two or more third coil portions 43 'exposed on the third surface of the body 50 is set to be larger than that of the first and second coil portions 41 and 42 By setting the number of turns equal to the number of turns, an internal area equivalent to the cutting margin can be ensured, so that a high inductance can be realized and a high inductance can be realized by increasing the number of coil turns.

The other end of the first coil portion 41 may be connected to the other end of the one of the third coil portions 43 'by a via 45.

Likewise, the other end of the second coil part 42 may be connected to the other end of the one of the third coil parts 43 'by a via 45.

The two or more third coil portions 43 'exposed on the third surface of the body 50 may be electrically connected by a third external electrode 83 disposed on the third surface, Can be prevented.

4 is a perspective view showing an external electrode and a body of a coil component according to another embodiment of the present invention.

5 is an exploded perspective view of Fig.

4 and 5, a coil component 1000 according to another embodiment of the present invention includes a body 150 having a plurality of coil parts 141, 142, 143, and 144 disposed therein, And first to fourth external electrodes 181, 182, 183 and 184 connected to the coil parts 141, 142, 143 and 144. The plurality of coil parts 141, 142, 143 and 144 have a first coil part 141 having a lead 141 'exposed to the first surface of the body 150, a lead 142 exposed to the second surface facing the first surface, ') And two or more third coil parts 143 exposed to the first surface and a third surface in contact with the second surface, and a fourth surface facing the third surface, And four or more fourth coil portions 144 which are formed on the outer circumferential surface.

One end of each of the first coil portion and the second coil portion 141 and 142 has leads 141 'and 142' that are exposed to the first surface of the body 150 and the second surface facing the first surface, respectively. And the other end is connected to the other end of one of the third coil part 143 and the other end of the fourth coil part 144 by a via 145 inside the body 50.

Specifically, the other end of the first coil portion 141 may be connected to the other end of one of the third coil portions 143 by a via 145.

Likewise, the other end of the second coil portion 142 may be connected to the other end of the one of the fourth coil portions 144 by a via 145.

The third coil part 143 is disposed in the body and exposed to the third surface of the body 150.

The fourth coil part 144 is disposed in the body and exposed to the fourth surface of the body 150.

5, two (143a, 143b) third coil portions 143 are arranged, but the present invention is not limited thereto, and three or more third coil portions 143 may be disposed.

5, two (144a, 144b) of the fourth coil portions 144 are arranged. However, the present invention is not limited thereto, and three or more of the fourth coil portions 144 may be arranged.

The two or more third coil portions 143 exposed on the third surface of the body 150 may be electrically connected by a third external electrode 183 disposed on the third surface, .

In addition, the two or more fourth coil portions 144 exposed on the fourth surface of the body 150 may be electrically connected by a fourth external electrode 184 disposed on the fourth surface, .

According to another embodiment of the present invention, the interlayer connection of the third coil part 143 and the fourth coil part 144 to the third external electrode 183 and the fourth external electrode 184 ), It is possible to secure an internal area equivalent to the cutting margin, and to realize a high inductance.

In addition, since an array type external electrode can be realized, there is no influence on the size of the coil component, and a high inductance can be realized even if the size is the same as that of the conventional coil component.

The number of turns of the third and fourth coil sections 143 and 144 may be the same as the number of turns of the first and second coil sections 141 and 142.

By setting the number of turns of the third and fourth coil parts 143 and 144 equal to the number of turns of the first and second coil parts 141 and 142, an internal area equivalent to the cutting margin can be ensured and a high inductance can be realized. In addition, the number of coil turns increases, so that a high inductance can be realized.

An insulating layer 111 may be disposed between each of the plurality of coil parts 141, 142, 143, and 144.

The insulating layer 111 is the same as the insulating layer of the coil component according to the embodiment of the present invention described above, and thus will not be described here to avoid redundant description.

The first coil part and the second coil part 141 and 142 may be connected to the first and second external electrodes 181 and 182 through leads 141 'and 142', respectively.

The third coil part 143 is exposed to the third surface of the body 150 and connected to the third external electrode 183 disposed on the third surface.

The fourth coil part 144 is connected to the fourth external electrode 184 exposed on the fourth surface of the body 150 and disposed on the fourth surface.

The first and second external electrodes 181 and 182 may be formed on the first surface and the second surface, respectively, of the body 50 in the longitudinal direction (" L direction ").

The first and second external electrodes 181 and 182 may be spaced apart from each other and electrically separated from each other.

The first and second external electrodes 181 and 182 may extend to a top surface and a bottom surface of the body 150, respectively.

The first external electrode 181 may be used as an input terminal, and the second external electrode 182 may be used as an output terminal.

The third external electrode 183 may be formed on a third surface of the body 150 in the width direction (" W direction ").

The third external electrode 183 may extend to a top surface and a bottom surface of the body 150.

The fourth external electrode 184 may be formed on the fourth surface of the body 150 in the width direction (" W direction ").

The fourth external electrode 184 may extend to a top surface and a bottom surface of the body 150.

The third external electrode 183 and the fourth external electrode 184 may be treated as No Contact terminals when mounted on a printed circuit board.

The present invention is not limited by the above-described embodiments and the accompanying drawings, but is intended to be limited only by the appended claims. It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. something to do.

100, 1000: coil part 50, 150: body
11, 111: insulating layer
41, 42, 141, 142, 43, 143, 144: first to fourth coil parts
81, 82, 83, 181, 182, 183, 184:

Claims (13)

A body having a plurality of coil portions disposed therein; And
And first to third external electrodes disposed on an outer circumferential surface of the body and connected to the coil portion,
Wherein the plurality of coil portions include a first coil portion having a lead exposed on a first surface of the body, a second coil portion having a lead exposed on a second surface facing the first surface, Coil part composed of more than three third coil parts.
The method according to claim 1,
And the other end of the first coil part and the other end of the third coil part are connected via a via.
The method according to claim 1,
And the other end of the second coil part and the other end of the third coil part are connected via a via.
The method according to claim 1,
Wherein the number of turns of the third coil part is equal to the number of turns of the first and second coil parts.
The method according to claim 1,
And the at least two third coil portions are connected to each other by a third outer electrode.
The method according to claim 1,
And an insulating layer is disposed between each of the plurality of coil parts.
A body having a plurality of coil portions disposed therein; And
And first to fourth external electrodes disposed on an outer circumferential surface of the body and connected to the coil portion,
Wherein the plurality of coil portions include a first coil portion having a lead exposed to a first surface of the body, a second coil portion having a lead exposed to a second surface facing the first surface, And two or more third coil portions exposed to a third side facing the third side, and two or more fourth coil portions exposed to a fourth side facing the third side.
8. The method of claim 7,
And the other end of the first coil part and the other end of the third coil part are connected via a via.
8. The method of claim 7,
And the other end of the second coil part and the other end of the fourth coil part are connected to each other by a via.
8. The method of claim 7,
Wherein the number of turns of the third and fourth coil parts is equal to the number of turns of the first and second coil parts.
8. The method of claim 7,
And the at least two third coil portions are connected to each other by a third outer electrode.
8. The method of claim 7,
And the two or more fourth coil portions are connected to each other by a fourth external electrode.
8. The method of claim 7,
And an insulating layer is disposed between each of the plurality of coil parts.

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