JP2001244119A - Inductor array - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inductor array whose productivity can be improved. SOLUTION: The inductor array comprises a magnetic body 11, which is approximately square and plate shape, a plurality of internal conductors 24 and 28 provided inside the magnetic body 11 so as not to short-circuit with each other, and external electrodes 12-15 connected electrically to the internal conductors 24 and 28. In this case, the external electrodes 12-15 are formed at a positions where they are symmetrical with respect to the central point of the magnetic body 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductor array widely used for electric appliances such as small digital electronic equipment and office automation equipment.

[0002]

2. Description of the Related Art In recent years, high-density mounting has been promoted as digital devices and the like have become smaller and thinner. In the field of noise suppression components, there is an increasing demand for miniaturization and integration of multilayer inductor components and LC composite components. Under such circumstances, for example, an inductor array having a structure in which four chip components corresponding to 1.0 mm × 0.5 mm size are incorporated in one package of 2.0 mm × 1.0 mm size has been put to practical use.

[0003] Hereinafter, a conventional inductor array will be described.
This will be described with reference to the drawings.

FIG. 5 is a perspective view of a conventional inductor array.
FIG. 6 is an exploded perspective view of a conventional inductor array.

In FIG. 5 and FIG. 6, a total of eight external electrodes 2 are provided at both ends of a plate-shaped magnetic body 1 so as to face four each. The magnetic material 1 includes four via electrodes 4 formed on a first magnetic material sheet 3, four internal conductors 6 formed on a second magnetic material sheet 5, and a third magnetic material sheet 7. Have been.

The four inner conductors 6 formed on the second magnetic sheet 5 are provided vertically above and below the first magnetic sheet 3 provided with the via electrode 4. The internal conductors 6 are connected by the via electrodes 4 to form four independent coiled conductors.

The inner conductor 6 is provided above and below the coiled conductor.
The third magnetic sheet 7 is provided so as to have an appropriate thickness so as not to be exposed. The first magnetic sheet 3, the second magnetic sheet 5, and the third magnetic sheet 7 are made of ferrite. In addition, these magnetic sheets 3,
5 and 7 are preferably formed of the same magnetic material.

Further, external electrodes 2 are provided at both ends of the magnetic body 1 so as to be electrically connected to the respective internal conductors 6.

In this conventional inductor array, each internal conductor 6 is formed in a direction parallel to the side surface of the magnetic body 1. At this time, the length of the surface of the magnetic body 1 on which the external electrode 2 is formed (the end face of the magnetic body 1) is L, and the surface of the magnetic body 1 on which the external electrode 2 is not formed (the side surface of the magnetic body 1, each internal conductor 6 is When the length is W, the relationship of L ≠ W is established.

A method of manufacturing the conventional inductor array having the above-described configuration will be described below with reference to the drawings.

FIG. 7A is an exploded perspective view showing a conventional method for manufacturing an inductor array, and FIGS. 7B and 8 are perspective views showing a method for manufacturing the inductor array.

First, a first magnetic sheet 3 on which four via electrodes 4 are formed, a second magnetic sheet 5 on which four internal conductors 6 are formed, and a third magnetic sheet 7 are respectively formed. Provide. At this time, each sheet is cut into an appropriate size.

Next, as shown in FIG. 7A, the second magnetic sheets 5 are joined to each other via the first magnetic sheets 3 to form vias formed in the first magnetic sheets 3. Electrode 4
The internal conductors 6 are connected to each other to provide four independent coiled conductors. Further, the third magnetic sheet 7 is laminated so as to have an appropriate thickness so that the inner conductor 6 is not exposed above and below the coil-shaped conductor, and the magnetic body 1 is provided and baked. At this time, as shown in FIG. 7B, the ends 8 of the coil-shaped conductors (eight in total) are exposed on the opposite end faces of the magnetic body 1.

Finally, as shown in FIG. 8, a conductor paste is applied to both ends of the magnetic body 1 so as to be electrically connected to the ends 8 of the respective coiled conductors exposed from the magnetic body 1. By firing, eight external electrodes 2 were formed to manufacture a conventional inductor array.

The conventional inductor array configured as described above has a structure in which four internal conductors 6 are independently provided and are built in one of these four packages (one magnetic body). ing. The same structure is used when the number of internal conductors is other than four, and the area occupied by each internal conductor is substantially the same so that each internal conductor has the same characteristics (DC resistance value, impedance value). ing.

Further, the surface on which the external electrode 2 is to be formed is defined by making the shape of the plate-shaped magnetic body 1 rectangular.

For example, the magnetic body 1 has a configuration in which four single products (inductors in which only one coiled conductor is formed) are built in parallel, and a conventional inductor has a single product shape of 1.0 mm × 2.0 mm × 1.
The shape of one package is rectangular, such as 6.4 mm × 3.2 mm when the shape of a single product is 3.2 mm × 1.6 mm.

That is, the length of the surface of the magnetic body 1 on which the external electrode 2 is formed (the end face of the magnetic body 1) is different from the length of the surface on which the external electrode 2 is not formed (the side surface of the magnetic body 1). As a result, the external electrodes 2
Therefore, the surface on which the external electrode 2 is formed can be automatically defined.

In a circuit pattern in which a plurality of single inductors having the same characteristics can be mounted in parallel on a circuit board, a plurality of single products are built in one magnetic body (one package), rather than a plurality of single products are mounted. An inductor array is useful as a component for improving mounting efficiency.

[0020]

However, the above-mentioned conventional inductor array has a problem that productivity cannot be improved.

That is, the end surface (the surface on which the external electrode is formed)
, The shape of the plate-like magnetic material is made rectangular,
Since the external electrodes must be defined on the long surface (end surface) of the magnetic body, the shape of the magnetic body becomes large.

At this time, it is necessary to keep the length of the side surface of the magnetic body (each internal conductor is formed in parallel to this surface) unchanged. Because, since the inner conductor is formed in parallel to the side surface, changing the length of the side surface shortens the length of each internal conductor,
This is because the characteristics of each internal conductor change.

On the other hand, when the length of the end face is shortened without changing the length of the side face of the magnetic body and the shape of the plate-shaped magnetic body is made substantially square, the shape of the magnetic body becomes longer than that of the side face of the magnetic body. It can be minimized within the range that can be considered under the same condition, but since the length of the end face and the side face of the magnetic material are the same, it can not be specified whether to form an external electrode on either the end face or the side face of the magnetic material ,
As a result, it is necessary to check the surfaces on which the external electrodes are formed one by one, or the yield is reduced, and the productivity is reduced.

An object of the present invention is to solve the above-mentioned conventional problems and to provide an inductor array capable of improving productivity.

[0025]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a substantially square plate-shaped magnetic body and a plurality of magnetic bodies provided inside the magnetic body and provided so as not to short-circuit each other. An internal conductor and an external electrode electrically connected to the internal conductor, wherein the external electrode is formed at a position substantially point-symmetric with respect to the center of the magnetic body. Thus, an inductor array that can improve productivity can be obtained.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a substantially square plate-shaped magnetic body and a plurality of internal bodies provided inside the magnetic body and provided so as not to be short-circuited to each other. A conductor and an external electrode electrically connected to the internal conductor, wherein the external electrode is formed at a position substantially point-symmetric with respect to the center of the magnetic body. Since the shape of the plate-like magnetic material is substantially square, the shape of the magnetic material can be minimized, and furthermore, after forming a pair of external electrodes, rotating the magnetic material at a fixed angle, the pair of external electrodes Since the formation positions of the other pair of external electrodes automatically match, the external electrode can be formed simply by fixing the coating device of the external electrode and rotating the magnetic body at a fixed angle,
This has the effect of improving productivity.

According to a second aspect of the present invention, there is provided a magnetic material having a substantially square plate shape, a plurality of internal conductors provided inside the magnetic material and provided so as not to be short-circuited with each other; An external electrode that is electrically connected, wherein the external electrodes are formed at four corners of the magnetic body. According to this configuration, the shape of the plate-like magnetic body is substantially square, Since the shape of the body can be minimized and the external electrodes are not formed only on the side surfaces or end faces of the magnetic body, but are formed at the four corners (both ends of the side faces and end faces of the magnetic body) of a substantially square plate-like magnetic body. In addition, the surface on which the external electrodes are formed does not need to be distinguished, which has the effect of further improving the productivity.

According to a third aspect of the present invention, a shield layer is formed between each of the internal conductors. According to this structure, the magnetic field generated in each of the internal conductors can be cut off by the shield layer. Has the function of preventing magnetic interference.

According to a fourth aspect of the present invention, each internal conductor is electrically connected to an external electrode formed at a pair of diagonal positions. Is the same as the diagonal length of the plate-like magnetic material, so that the length of the internal conductor and the length of the side surface of the magnetic material are the same by arranging the internal conductors in parallel in the magnetic material, An inductor array whose size can be reduced is obtained.

Further, when all the internal conductors have the same characteristic and the number of the internal conductors is an even number, the external electrodes are formed at the four corners of a substantially square plate-shaped magnetic body, and each pair of the external electrodes has one pair. By electrically connecting the same number of internal electrodes to the external electrodes formed at the corner positions, the mounting position can be reduced to 90%.
The internal conductor having the same characteristics is connected between the electrodes of the mounting board even if rotated by 180 ° or 180 °, and thus has the effect of improving the mountability.

Hereinafter, an inductor array according to an embodiment of the present invention will be described with reference to the drawings.

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

In FIGS. 1 and 2, reference numeral 11 denotes a substantially square plate-like magnetic material. 12 to 15 are external electrodes;
One end face 16 and one side face 17 are provided at both ends in total. That is, the external electrodes 12 to 15 are located at four corners of the substantially square plate-shaped magnetic body 11. The external electrodes 12 to 15 are formed in the order of an end face electrode made of silver, an intermediate plating layer made of nickel, and a low melting point metal plating layer made of tin, solder, or the like. Here, when the length of the end face 16 is L and the length of the side face 17 is W, the relationship of L ≒ W is established. Further, the magnetic body 11 is composed of two laminated products 1.
The first laminate 18 and the second laminate 19 each have one independent conductor pattern therein.

The magnetic body 11 may not have a plate shape, but may have a certain thickness with respect to the end face 16 and the side face 17 thereof. Further, a concave portion or a convex portion may be provided in a portion of the magnetic body 11 where the external electrodes 12 to 15 are formed, and the external electrodes 12 to 15 may be formed in the concave portions or the convex portions.

A first magnetic sheet 21 has a first via electrode 22. The first via electrode 22 is formed by filling a through-hole formed in the first magnetic sheet 21 with a conductive material such as silver. Reference numeral 23 denotes two second magnetic sheets, which are formed above and below the first magnetic sheet 21. Numeral 24 denotes two first inner conductors, which are inductor elements, formed between the two second magnetic sheets 23 and via the first magnetic sheet 21. Are connected by a first via electrode 22,
It is one independent conductor pattern. The first inner conductor 24 is formed in a spiral shape so as to extend outward from a central portion of the first magnetic material sheet 21 directly below or directly above the first via electrode 22, and has a tip portion at each end. At the diagonal position of the second magnetic material sheet 23,
Of the magnetic sheet 23. The distal end is electrically connected to the external electrodes 13 and 15. The first laminate 18 includes the first magnetic sheet 21, the first via electrode 22, the second magnetic sheet 23, and the first inner conductor 24 formed in this manner.

Reference numeral 25 denotes a third magnetic sheet having a second via electrode 26. The second via electrode 26 is formed by filling a through hole provided in the third magnetic sheet 25 with a conductive material such as silver. Reference numeral 27 denotes two fourth magnetic sheets, which are formed above and below the third magnetic sheet 25. Numeral 28 denotes two second inner conductors as inductor elements, which are formed between the two fourth magnetic sheets 27 and via the third magnetic sheet 25, and the second inner conductors 28 Are connected by the second via electrode 26 to form one independent conductor pattern. The second inner conductor 28 is formed in a spiral shape extending outward from a central portion of the third magnetic sheet 25 immediately below or directly above the second via electrode 26, and has a tip portion at each end. Are at diagonal positions of the fourth magnetic sheet 27,
The fourth magnetic sheet 27 extends to the end face. The tip is electrically connected to the external electrodes 12 and 14. The second laminate 19 is the third laminate 19 thus formed.
, A second via electrode 26, a fourth magnetic sheet 27, and a second inner conductor 28.

The second inner conductor 28 and the first inner conductor 24 are electrically insulated so as not to be short-circuited. Further, the second inner conductor 28 is the first inner conductor 24
(DC resistance value, impedance value).

In order to prevent magnetic interference between the first inner conductor 24 and the second inner conductor 28, the first inner conductor 24 and the second inner conductor 28 (the first laminated body 18) Between the first and second laminates 19), a magnetic shield layer made of metal may be provided so that the magnetic field generated by the two internal conductors 24 and 28 can be cut off.

When the first inner conductor 24 and the second inner conductor 28 are located at the same position in the stacking direction and have the same winding direction, the magnetic field generated by each of the inner conductors 24 and 28 is Can strengthen or weaken each other.

Reference numeral 29 denotes a fifth magnetic sheet, which is provided between the first laminate 18 and the second laminate 19 and the first laminate 18.
, The upper surface of the second laminate 19. Note that a plurality of fifth magnetic sheets 29 may be provided as needed.

The magnetic sheet 30 includes a first magnetic sheet 21, a second magnetic sheet 23, and a third magnetic sheet 2.
Fifth, fourth magnetic sheet 27, fifth magnetic sheet 29
And the material is ferrite, and the shape is substantially square. Of the external electrodes 12 to 15 located at the four corners of the substantially square plate-shaped magnetic body 11, the external electrodes 13 and 15 formed at diagonal positions are the first inner conductor 24, The outer electrodes 14 and 16 are the second inner conductor 2
8 respectively. That is, each internal conductor 2
4 and 28, external electrodes 13 and 15 (1
2, 14) are formed. The first inner conductor 24 has external electrodes 13 and 15 formed at one pair of diagonal positions, and the second inner conductor 28 has outer electrodes 13 and 15 formed at another pair of diagonal positions. Since they are electrically connected to the electrodes 12, 14, the first inner conductor 24 and the second
Are electrically crossed with each other.

The manufacturing method of the inductor array configured as described above will be described below with reference to the drawings.

FIG. 3A is an exploded perspective view showing a method of manufacturing an inductor array according to an embodiment of the present invention.
(B) and FIG. 4 are perspective views showing a method for manufacturing the inductor array.

First, a substantially square magnetic material sheet 30 is formed from a ferrite slurry by a green sheet method, and the second magnetic material sheet 23 and the fourth magnetic material sheet 2 are formed.
7. A predetermined number of fifth magnetic sheets 29 are provided.

Next, a through hole is provided in the center of the magnetic material sheet 30, and the through hole is filled with a conductive material such as silver to form a first hole.
The first magnetic sheet 21 having the via electrode 22 and the third magnetic sheet 25 having the second via electrode 26 are formed.

Next, as shown in FIG. 3A, a first magnetic sheet 21 is formed between the second magnetic sheets 23,
In addition, two first inner conductors 24 are provided via the first magnetic sheet 21, and the first inner conductors 24 are connected to each other by the first via electrodes 22 to form one independent conductor pattern. The first internal conductor 24 is provided between the second magnetic sheets 23. Further, the first inner conductor 24 is formed in a spiral shape so as to spread outward from the central portion of the first magnetic material sheet 21 immediately below or directly above the first via electrode 22, and is formed in a spiral shape. The leading end extends to the end face of the second magnetic sheet 23 at a diagonal position of the second magnetic sheet 23. Thus, the first magnetic material sheet 21 and the first via electrode 2
2. A first laminate 18 including the second magnetic sheet 23 and the first inner conductor 24 is formed.

Then, the third magnetic sheet 25 is formed between the fourth magnetic sheets 27 in the same manner as the first laminate 18, and the two second magnetic sheets 25 are interposed between the second magnetic sheets 25.
Are provided, and the second internal conductors 28 are
Via electrodes 26 to form one independent conductor pattern. Note that the second inner conductor 28 is
Between the magnetic material sheets 27. Also, the second
Are formed in a spiral shape so as to extend outward from the center of the third magnetic sheet 25 directly below or directly above the second via electrode 26, and each of the end portions is formed in a spiral shape. 4 at diagonal positions of the magnetic sheet 27,
The fourth magnetic sheet 27 extends to the end face.
Thus, the third magnetic sheet 25, the second via electrode 26, the fourth magnetic sheet 27, the second inner conductor 2
A second laminate 19 of 8 is formed. And the first
The fifth magnetic sheet 29 is provided between the laminate 18 and the second laminate 19, the lower surface of the first laminate 18, and the upper surface of the second laminate 19. As a result, an integrated laminate including the first laminate 18, the second laminate 19, and the fifth magnetic sheet 29 is obtained.

Next, as shown in FIG. 3B, after applying a predetermined pressure to the integrated laminate, the laminate is heated in air to remove the binder by firing, and fired at a high temperature of about 850 ° C. to 950 ° C. Thus, the magnetic body 11 is obtained. At this time, the first inner conductor 2
4. Positions where the end portions 31 of the second internal conductor 28 are diagonal to the second magnetic sheet 23 and the fourth magnetic sheet 27, respectively (both ends of the end face 16 and the side face 17 of the magnetic body 11).
In the above, it is exposed from the magnetic body 11.

Finally, as shown in FIG. 4, the first inner conductor 2 is provided on both ends of the end face 16 and the side face 17 of the magnetic body 11.
4. The external electrodes 12 to 15 are formed so as to be connected to the respective end portions 31 of the second internal conductor 28, and the inductor array according to the embodiment of the present invention is manufactured. At this time, a silver paste is applied to each end 31 of the first internal conductor 24 and the second internal conductor 28 and fired at 550 ° C. to 900 ° C. to form an end face electrode, and covers the end face electrode. As described above, the external electrodes 12 to 15 are formed by providing a nickel plating layer by plating, and further, by plating tin, solder, or the like so as to cover the nickel plating layer to provide a low melting point metal plating layer.

In the inductor array according to the embodiment of the present invention, the shape of the plate-like magnetic body 11 is made substantially square, so that the shape of the magnetic body 11 can be made the smallest.

That is, when the length of the end face 16 is shortened without changing the length of the side surface of the magnetic body 11 and the shape of the plate-like magnetic body 11 is made substantially square, the shape of the magnetic body 11 becomes This is because the length can be minimized within a conceivable range under the condition that the length of the side surface 17 is not changed.

Further, the external electrodes 12 to 15 are not formed only on the side faces or end faces of the magnetic body 11, but are provided at the four corners of the substantially square plate-like magnetic body 11 (both ends of the side face 17 and the end face 16 of the magnetic body 11). In this case, the surfaces (portions) on which the external electrodes 12 to 15 are formed do not need to be distinguished, so that it is not necessary to confirm the surfaces on which the external electrodes are formed one by one, and the yield does not deteriorate. The effect of improving productivity is obtained.

Of course, the external electrodes 12 to 15 are
The external electrodes 12 to 15 are not limited to the four corners of the magnetic material 11.
Is formed at a position which is substantially point-symmetric with respect to the center of the pair of external electrodes 12 and 13 and then formed at a certain angle (18).
By rotating the magnetic body 11 at 0 °), the positions at which the pair of external electrodes 14 and 15 are formed and the pair of external electrodes 1
Since the application surfaces of the silver paste application devices formed with 2, 13 automatically match, the external electrodes 12 to 15 can be formed only by rotating the magnetic body 11 at a fixed angle, thereby improving the productivity. I do.

In addition to these, the internal conductors 24 and 28 are connected to external electrodes 13 and 15 (1
2, 14), the length of the internal conductors 24, 28 can be made the same as the diagonal length of the plate-shaped magnetic body 11, whereby the internal conductors 24, 28 are arranged in parallel in the magnetic body 11, As a result, an inductor array having a smaller shape can be obtained as compared with a conventional inductor in which the lengths of the inner conductors 24 and 28 and the length of the side surface 17 of the magnetic body 11 are the same. At this time, since the lengths of the internal conductors 24 and 28 do not change, the characteristics of the internal conductors 24 and 28 do not change.

Further, when all the internal conductors have the same characteristics and the number of the internal conductors is even,
Are formed at four corners of a substantially square plate-shaped magnetic body 11 and external electrodes 13 and 15 are formed at a pair of diagonal positions.
By electrically connecting the internal electrodes to (12, 14), even if the mounting position is rotated by 90 ° or 180 °, the internal conductor having the same characteristics is connected to the electrodes of the mounting board. This has the effect of improving the mountability. Note that each pair of diagonal external electrodes 13,
The number of the internal conductors connected to 15 (12, 14) must be the same, and the internal conductors must not be short-circuited to each other. Even if the plate-shaped magnetic material is a regular polygon such as an equilateral triangle or a circle, if the internal conductors are formed at the parts corresponding to each vertex or at the part that is rotationally symmetric, the mounting position can be rotated at a certain angle in the same way The characteristics do not change.

Further, since the external electrodes 12 to 15 are formed at both end portions of the side face 16 and the end face 17 (four corners of the plate-shaped magnetic material having a substantially square shape), the external electrode is provided only on the end face 17 of the magnetic material 11 as in the related art. The distance between external electrodes can be made larger than that in the case of forming 12 to 15.

Further, the first laminate 18 or the second laminate 18 is formed on the upper surface of the inductor array in one embodiment of the present invention.
Even if three or more internal conductors are provided in the magnetic body by further laminating the laminates 19 of the above, each of the internal conductors is electrically connected to diagonal external electrodes so as not to short-circuit each other, and If the external electrodes are formed on both sides (four corners of a substantially square, plate-like magnetic material) of the side surface and the end surface of the body, the same effects as those described above can be obtained. However, it is necessary to provide an external electrode separately for each internal conductor, and when the number of internal conductors is an odd number of three or more, it is necessary to pay attention to the direction during mounting.

Further, even when the inner conductor is formed to be a resistor or a counter electrode of a capacitor, the same effect as that of the inductor array according to the above-described embodiment of the present invention can be obtained.

[0059]

As described above, the inductor array of the present invention comprises a substantially square plate-shaped magnetic material, and a plurality of internal conductors provided inside the magnetic material and provided so as not to short-circuit each other. An external electrode electrically connected to the internal conductor, wherein the external electrode is formed at a position substantially point-symmetric with respect to the center of the magnetic body. Since the shape of the magnetic body is made substantially square, the shape of the magnetic body can be minimized.Furthermore, after forming a pair of external electrodes, if the magnetic body is rotated at a fixed angle, this pair of external electrodes and another pair Since the formation position of the external electrode automatically matches, the external electrode can be formed simply by fixing the coating device of the external electrode and rotating the magnetic body at a certain angle,
Thereby, the effect of improving the productivity is achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an inductor array according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the inductor array.

FIG. 3A is an exploded perspective view showing a method for manufacturing the inductor array. FIG. 3B is a perspective view showing a method for manufacturing the inductor array.

FIG. 4 is a perspective view showing a method for manufacturing the inductor array.

FIG. 5 is a perspective view of a conventional inductor array.

FIG. 6 is an exploded perspective view of the inductor array.

FIG. 7A is an exploded perspective view showing a method for manufacturing the inductor array. FIG. 7B is a perspective view showing a method for manufacturing the inductor array.

FIG. 8 is a perspective view showing a method for manufacturing the inductor array.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Magnetic body 12-15 External electrode 24 Internal conductor (1st internal electrode) 28 Internal conductor (2nd internal electrode)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Eiichi Uryu 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F-term (reference) 5E070 AA01 AA05 AB01 AB02 BA12 CB13 CB17 DA17 EA01 EB03

Claims (4)

[Claims] 1. A substantially square plate-shaped magnetic material, a plurality of internal conductors provided inside the magnetic material and provided so as not to be short-circuited with each other, and an external electrically connected to the internal conductor And an inductor array, wherein the external electrodes are formed at positions substantially symmetric with respect to the center of the magnetic body. 2. A substantially square plate-shaped magnetic body, a plurality of internal conductors provided inside the magnetic body and provided so as not to be short-circuited with each other, and an external electrically connected to the internal conductor And an external electrode, wherein the external electrode is
An inductor array formed in a corner. 3. The inductor array according to claim 1, wherein a shield layer is formed between each internal conductor. 4. The inductor array according to claim 2, wherein each inner conductor is electrically connected to an external electrode formed at a pair of diagonal positions.