JPH08279416A - Core for chip inductor - Google Patents

Abstract

PURPOSE: To obtain a core for a chip inductor which enables prevent of mutual attraction of cores at the time of consecutive printing of electrodes and consequent great improvement of the efficiency of production of the cores. CONSTITUTION: In a core 1 which has a winding part 2 whereon a winding is wound round and flange parts 3 which are formed integrally on the opposite sides of the winding part 2, and on the electrode forming surfaces of the flange parts 3 of which an electrode material is printed to form electrodes 4, the flange parts 3 are provided with space forming parts respectively and the electrode forming surfaces of adjacent cores 1 are put in a noncontinuous state by the space forming parts on the occasion when the electrode forming surfaces of the cores 1 in a plurality are positioned within the same plane practically and the other sides of the flanges parts 3 are provided adjacently to each other. The space forming part is formed, for instance, of an end face 4 such as a cut face, or a projection, a circular-arc face or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core of a chip inductor which is surface-mounted on a printed circuit board for use.

[0002]

2. Description of the Related Art Conventionally, chip inductors used in electronic equipment such as communication equipment have been miniaturized and printed circuit boards by directly printing electrodes on the core as products become lighter, thinner and smaller. It is designed to be easy to implement. The core A of this chip inductor is shown in FIG.
As shown in, a winding portion B in which the winding is wound a predetermined number of times,
It has a pair of flange portions C integrally formed at both ends of the winding portion B, and the flange portion C is generally formed in a rectangular parallelepiped shape. Then, on one side surface D of the flange portion C as an electrode formation surface, an electrode E is formed by printing a paste electrode paint by screen printing or the like.

[0003]

By the way, this core A
When the electrode E is printed on, the side faces F, which are the outer side faces of the plurality of cores A, are placed in contact with each other and continuously printed as shown by the chain double-dashed line in FIG. As shown, the electrodes E of the two cores A that are in contact with each other are printed in a continuous state, and the two cores A are stuck together. As a result, even if the cores A stuck to each other are not separated, or even if they are separated from each other, the state shown in FIG. When the core A was released, problems such as the electrode E peeling off from the side surface D occurred, and it was practically difficult to form the electrode E by printing with the core A continuously arranged.

Therefore, in order to prevent the sticking of the cores A, a method of printing by separating a plurality of cores A for a predetermined period is performed. However, in this method, it is necessary to perform a setting operation for arranging the cores A one by one, for example, so that the work becomes very troublesome and complicated in the miniaturized core A, and the electrode E is not required. There is a problem in that a large amount of continuous printing cannot be performed and the production efficiency of the core A is significantly reduced. In reality, this decrease in production efficiency is a major issue to be solved as chip inductors become smaller and cost is further reduced.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent sticking of cores to each other during continuous printing of electrodes, which can greatly improve core production efficiency. It is to provide a core for a chip inductor.

[0006]

In order to achieve the above object, a core for a chip inductor according to claim 1 is integrally formed on a winding part around which a winding is wound and both ends of the winding part. In a core for a chip inductor in which an electrode paint is printed on the electrode forming surface of the flange portion to form an electrode, a space forming portion is provided in the flange portion, and an electrode forming surface of a plurality of cores is provided. When the other side surfaces of the flange portion are provided adjacent to each other while being positioned in substantially the same plane, the space forming portion causes the electrode forming surfaces of the adjacent cores to be in a discontinuous state.

In the core according to claim 2, the space forming portion is an end surface formed between the electrode forming surface of the flange portion and a side surface continuous with the electrode forming surface and abutting against another core. The core according to claim 3 is characterized in that the space forming portion is a protrusion formed on a side surface continuous with the electrode forming surface of the flange portion and on a side surface facing the other core. .

Further, in the core according to claim 4, the electrode forming surface is provided on a side surface of the flange portion which is located on the side opposite to the side surface on the winding portion side. The core is characterized in that a groove for drawing out the winding wire is formed on a side surface located between the electrode forming surface and the side surface on the winding portion side.

[0009]

According to the chip inductor core of the first aspect, the plurality of cores are arranged such that the other side surfaces of the flange portion are adjacent to each other so that the electrode forming surfaces of the flange portions are located in the same plane. When they are installed and arranged, the space forming portion forms a space such as a recess or a gap between the electrode forming surfaces of the adjacent cores, resulting in a discontinuous state. When a paste-like electrode coating material is printed on this electrode forming surface, the space forming portion prevents the electrode coating material from being continuously printed on the adjacent electrode forming surface, thereby preventing the cores from sticking to each other.

According to the second aspect of the present invention, a plurality of cores are formed by the end faces such as cut faces and rounded faces provided between the electrode forming surface and the side surface continuous with the electrode forming surface. When the electrode forming surfaces are positioned adjacent to each other in substantially the same plane, a concave portion is formed between the adjacent electrode forming surfaces, resulting in a discontinuous state. Further, according to the core of the third aspect, a space is formed between the side surfaces of the flange portion by the space forming portion formed of the protrusions formed on the opposite side surfaces of the flange portions of the adjacent cores, and the adjacent electrode is formed. The surfaces are discontinuous.

Further, according to the core of the fourth aspect, a side surface of the flange portion located on the side opposite to the side surface on the winding portion side,
That is, the electrode forming surface provided on the outer surface of the flange portion enables soldering in a state orthogonal to the pattern of the printed board, and for example, the chip inductor can be firmly surface-mounted on the printed board. Further, according to the core of the fifth aspect, the end portion of the winding is accommodated in the groove formed on the side surface of the flange portion, and the protrusion from the side surface of the end portion is eliminated to improve the degree of adhesion to the printed circuit board. To do.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a perspective view of a first embodiment of a core for a chip inductor according to the present invention. In the figure, a core 1 has a prismatic winding portion 2 around which a winding wire (not shown) is wound, and a pair of flange portions 3 integrally formed at both longitudinal ends of the winding portion 2. ing.

The flange portion 3 is formed in a substantially rectangular parallelepiped shape having six side surfaces 3a to 3f, and the winding portion 2 is integrally formed at a substantially central position of a pair of opposed side surfaces 3a of each flange portion 3. . In addition, an end surface 4 as a space forming portion, which is a cut surface cut at a predetermined angle, is provided between the continuous side surfaces of the four side surfaces 3c to 3f, which are the peripheral surface of the flange portion 3.
Are formed respectively. The planar electrodes 5 are formed on the side surfaces 3c (electrode formation surface) located on the upper surface of each flange portion 3.

The core 1 is manufactured, for example, as follows. That is, first, ferrite powder is pressure-molded with a mold including a lower mold and an upper mold to obtain a molded product, and the molded product is fired at a high temperature. At this time, the end surface 4 is formed simultaneously with the molding of the core 1 by the mold surfaces provided on the upper mold and the lower mold. Then, as shown in FIG. 2, a plurality of molded cores 1 are provided adjacent to the side surface 3f of each flange portion 3 with the side surface 3d of the other core 1 in contact with the side surface 3c. Position in the plane. At this time, a triangular concave portion 6 (space) is formed between the side surfaces 3c of the adjacent cores 1 by the end surfaces 4 provided on the flange portions 3 of the respective cores 1, and the adjacent side surfaces 3c are discontinuous. It becomes a state.

In this state, as shown by the chain double-dashed line, an electrode paint 8 such as silver paste is placed on the screen 7, the screen 7 is brought into contact with the side surface 3c of the core 1 from above, and the squeegee 9 is moved in the direction of the arrow. Electrode paint 8
Is printed on each side surface 3c. As a result, the electrode coating material 8 is continuously printed on each side surface 3c of the plurality of cores 1. At this time, the electrode coating material 8 is formed by the recesses 6 formed between the adjacent side surfaces 3c as shown in FIG. Each side 3c
Will not be continued.

As a result, the side surface 3c of each flange portion 3
A core 1 having flat electrodes 5 formed thereon is manufactured, a winding wire (not shown) is wound around the winding wire portion 2 of the core 1, and both ends of the winding wire are spot-welded to each electrode 5. A chip inductor can be obtained by fixing with, for example. And this chip inductor has a flange portion 3
The electrode 5 is surface-mounted on the printed board by, for example, reflow soldering to a pattern on the printed board (not shown).

Thus, according to the first embodiment described above,
The plurality of cores 1 are attached to the side surfaces 3d, 3f of the flange portion 3 thereof.
When they are abutted against each other and adjacent to each other, a concave portion 6 is formed between the side surfaces 3c by the end surface 4 of the flange portion 3 of each core 1 and a discontinuous state is formed. Even if the electrodes 5 are formed by printing, the adjacent electrodes 5 are not connected to each other, and the cores 1 are prevented from sticking to each other. As a result, problems such as sticking of the electrodes 5 are prevented, continuous printing of the electrodes 5 is possible, a large number of electrodes 5 can be formed at the same time, and the production efficiency of the core 1 can be significantly improved. .

Further, the end surface 4 of the flange portion 3 can be formed at the same time when the core 1 is molded by a mold by simply providing mold surfaces at the four corners of the upper mold and the lower mold, and therefore It facilitates formation and manufacture of the mold. For these reasons, the manufacturing cost of the core 1 can be reduced. Furthermore, since the electrode 5 can be formed in a flat shape, for example, it can be brought into close contact with the pattern of the printed board, and the chip inductor using the core 1 can be reliably fixed to the surface of the printed board. be able to.

In this embodiment, the side surface 3e located on the side opposite to the side surface 3c is used as an electrode forming surface, and the side surface 3c is formed.
It is also possible to print the electrode paint 8 to form the electrode 5 in the same manner as. Further, the side surface 3d or the side surface 3f can be used as the electrode forming surface, and in this case, the side surface 3c of the core 1 is formed.
Then, the side surface 3e of the other core 1 is brought into contact with the side surface 3d to form the concave portion 6 by the end surface 4 between the adjacent side surfaces 3d or 3f, and the electrode coating material 8 may be printed with the side surface 3d or 3f as the upper surface.

FIG. 4 shows a perspective view of a second embodiment of the core according to the present invention. The same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. The same applies to each of the following examples. In the core 1 of this embodiment, an end face 4 such as a cut face as a space forming portion is formed on the side faces 3c and 3e of each flange 3 on the side face 3b in the longitudinal direction, and each side face 3c (electrode forming face). The electrode 5 is formed on each of them.

As shown in FIG. 5, when the side faces 3b of a plurality of cores 1 are brought into contact with each other and the side faces 3c are adjacent to each other as shown in FIG. The triangular recess 6 formed by the end face 4 causes a discontinuous state. Then, in this state, the electrodes 5 are formed on the respective side surfaces 3c by screen-printing the electrode coating material 8 in the same manner as in the above embodiment. Also in this example,
In addition to the same effect as the first embodiment, the effect of facilitating the manufacture of the mold can be obtained, such as the total number of places where the end face 4 of the mold is formed is 4 places. .

By the way, in the second embodiment, the side surface 3c or the side surface 3e of the flange portion 3 can be the electrode forming surface, but the side surface 3b continuous to the side surfaces 3c and 3e can be the electrode forming surface. In this case, multiple cores 1
As shown in FIG. 6, the other core 1 is attached to the side surface 3e of the core 1.
By abutting the side faces 3c so as to be adjacent to each other, the concave portions 6 are formed by the end faces 4 between the adjacent side faces 3b, and the side faces 3c are discontinuous. In this state, the electrode coating material 8 is screen-printed on the side surface 3b of each flange portion 3 located in the same plane to form the electrode 5 on each side surface 3b.

When the electrode 5 is formed on the side surface 3b which is the outer surface of the flange portion 3 as in this embodiment, the electrode 5 is formed on a printed circuit board (not shown) in addition to the effects of the above embodiment. The effects described below, such as being able to firmly fix, are also obtained. In addition, the end surface 4 in the first and second embodiments described above.
Is not limited to the cut surface, but may be the end surface 4 such as a rounded surface.

7 and 8 are perspective views showing a modification of the second embodiment, in which the side surface 3 which is the outer surface of each flange portion 3 is shown.
b is an arc surface or a polygonal surface. That is,
In the core 1 shown in FIG. 7, the entire side surface 3b of each flange portion 3 is an arcuate surface 10, and the electrodes 5 are formed on each side surface 3c (electrode forming surface).

In this core 1, the arcuate surface 10 itself acts as a space forming portion, and the arcuate surface 10 of another core 1 is brought into contact with this arcuate surface 10 as shown by the chain double-dashed line in FIG. A recess 6 having a cavernous shape is formed between both ends of the arcuate surface 10 of both cores 1 in the circumferential direction (arrow B direction in FIG. 7). Due to the concave portion 6, the side surfaces 3c and 3e that are continuous with the end portion of the arcuate surface 10 in the circumferential direction are in a discontinuous state. For example, the side surface 3c of each flange portion 3 is positioned on the upper side and located in the same plane. Similarly to the above, the electrode 5 is formed on each side surface 3c by screen printing.

In the core 1 of FIG. 8, the entire side surface 3b of each flange portion 3 is a polygonal surface 11, and the electrodes 5 are formed on each side surface 3c (electrode forming surface). Also in the core 1 of this embodiment, as shown by the chain double-dashed line in FIG. The concave portion 6 having a concave shape is formed, and similarly to the above, the electrode 5 is formed by printing on each side surface 3c. In these two embodiments, the recess 6 can be formed relatively deeply, and the effect that the sticking of both cores 1 is further prevented can be obtained.

FIG. 9 is a perspective view showing a third embodiment of the core according to the present invention. In the core 1 of this embodiment, a cylindrical projection 12 as a space forming portion is integrally formed at a substantially central position of the side surface 3b of each flange portion 3 when the core 1 is formed, and each side surface 3c (electrode forming surface) is formed. ), And the electrodes 5 are formed on each.

In this core 1, as shown in FIG. 10, the side surfaces 3b of the plurality of cores 1 on which the protrusions 12 are formed are made to face each other, and the protrusions 12 are brought into contact with each other. By this abutment of the projection 12, the end edges of the side surfaces 3c to 3f of each flange portion 3 are completely separated from each other by a dimension that is twice the height of the projection 12, and the side surfaces located in the same plane. A gap 13 (space) is formed between the edges in the width direction (continuous direction) of 3c, and the adjacent side surfaces 3c are in a discontinuous state. In this state,
The electrode 5 is formed on each side surface 3c by printing the electrode paint 8 on the side surface 3c by screen printing. In this embodiment, the side surfaces 3d to 3f can be used as electrode forming surfaces.

FIG. 11 is a perspective view showing a modified example of the third embodiment. In the core 1 of this embodiment, the protrusion 12 is provided on the side surfaces 3d and 3f of each flange portion 3 (the protrusion on the side surface 3f is not shown). )
Are formed respectively. For this core 1,
As shown by the chain double-dashed line in FIG. 11, the plurality of cores 1 are provided on the side surface 3d on which the projections 12 are formed, and the projections 12 of other cores 1 are formed.
The side surface 3f on which (not shown) is formed is brought into contact with and adjacent to the side surface 3f, and a gap 13 is formed between the edges of the side surface 3c in the longitudinal direction (continuous direction).
To form. Then, the electrodes 5 are formed on the respective side surfaces 3c (electrode formation surface) by screen printing in the same manner as described above. In this embodiment, the side surface 3e
Of course, the side surface 3b can be used as an electrode formation surface.

In the third embodiment, the projections 12 are formed on the pair of side surfaces 3b or the side surfaces 3d and 3f with respect to each other, but the projections 12 are formed only on one side surface 3b and the side surface 3b is formed. A plurality of cores 1 may be provided adjacent to each other by bringing the side surface 3b of the other core 1 on which the projection 12 is not formed into contact with the projection 12. Also, side surface 3
Similarly, with respect to d and 3f, the protrusion 12 can be formed only on one side surface 3d or the side surface 3f. In these cases, a gap 13 having a height corresponding to one protrusion 12 is formed.

Further, the shape of the projection 12 is not limited to the above-mentioned columnar shape, and may be a hemispherical projection 12 as shown in FIG. 12A or a semi-spherical shape as shown in FIG. For example, the protrusion 12 may have a proper shape such that the electrode forming surface of the flange portion 3 can be separated by a predetermined distance, such as the protrusion 12 having a cylindrical shape. Also in this third embodiment, in addition to the same effect as the first embodiment, the height of the protrusion 12 is provided by the protrusion 12 between adjacent side faces 3c as electrode forming faces. Since the gap 13 which is completely separated by the distance is formed, the continuous state of the electrode coating material 8 at the time of printing is almost completely eliminated, and sticking between the cores 1 can be reliably prevented.

FIG. 13 is a perspective view of a chip inductor using the core of the fourth embodiment according to the present invention. In the core 1 of the fourth embodiment, an arcuate surface 14 (electrode forming surface) is formed on the side surface 3b of each flange portion 3, and the end surface of the arcuate surface 14 on the side surfaces 3d and 3f is formed of a cut surface or the like. The end face 4 is formed, and a groove 15 for drawing out the winding wire is provided on the side faces 3c and 3e. The groove 15 is provided integrally with each flange portion 3 simultaneously with the molding of the core 1, and is provided between the center upper and lower portions of the side surface 3 a and the arc-shaped surface 14 respectively. Further, the electrodes 5 are formed on each arcuate surface 14 by pressure roller printing, as will be described later.

As shown in FIG. 14, in this core 1, when the side faces 3f of the other cores 1 are brought into contact with the side faces 3f so that the arcuate faces 14 of the plurality of cores 1 are located in substantially the same plane, Triangular recesses 6 are formed between the arcuate surfaces 14 by the end surfaces 4, and the adjacent arcuate surfaces 14 are discontinuous.

In this state, for example, a plurality of cores 1 are continuously arranged with the arcuate surface 14 vertical, and the cores 1 are continuously moved in the arrow C direction and fed between the pair of pressure rollers 17. Due to the movement of the core 1, the arcuate surfaces 14 are brought into contact with the outer surfaces between the pressure rollers 17 at a predetermined pressure, respectively, and the pressure rollers 17 are rotated in the direction of arrow D, so that the core 1 moves between the pressure rollers 17. Pass through. During this passage, the electrode paint 8 applied to the outer surface of the pressure roller 17 is printed on each arcuate surface 14 to form the electrode 5.

Then, as shown in FIG. 13, both end portions 16a of the winding wire 16 wound around the winding wire portion 2 of the core 1 are fixed to each electrode 5 by spot welding, for example. . At this time, both end portions 16a of the winding 16 are housed in the groove 15 of the side surface 3c of the flange portion 3 and guided out, and do not project from the surface of the side surface 3c. As a result, the chip inductor 21 is obtained in which both the terminal portions 16a of the winding 16 are connected to the electrodes 5 of the respective flange portions 3. The chip inductor 21 is surface-mounted on the printed board 18, as shown in FIG.

That is, with the side surface 3c of each flange 3 facing the printed circuit board 18, the electrode 5 is placed on the corresponding pattern 19 so that the electrode 5 and the pattern 19 are orthogonal to each other. At this time, on the side surface 3c of the core 1, the end portion 16a of the winding 16 is accommodated in the groove 15 and is disposed outside (the printed board 18).
Direction 3), the side surface 3c has a pattern 19
Will be stuck on top. In this state, the corners of the electrode 5 and the pattern 19 which are orthogonal to each other are soldered and fixed by the solder 20, so that the chip inductor 21 is surface-mounted on the printed board 18.

In the core 1 of the fourth embodiment,
The electrode forming surface provided on the side surface 3b is the arc-shaped surface 14 described above.
However, it may be a plane, for example. Further, the end face 4 may be provided between the side faces 3b and 3c, 3e, and in this case, the degree of freedom in the method of adjoining the plurality of cores 1 at the time of electrode printing is further increased.

In the core 1 of the fourth embodiment, in addition to the same effects as the first embodiment, the following effects can be obtained. That is, when the chip inductor 21 using the core 1 is surface-mounted on the printed circuit board 18, as described above, the electrodes 5 formed by the vertical surfaces and the patterns 19 formed by the horizontal surfaces are soldered at the corners orthogonal to each other. Therefore, the chip inductor 21 is mounted on the printed circuit board 1.
It becomes stronger against the force in the direction of peeling from 8 (direction of the vertical surface of the electrode 5), and the soldering strength of the chip inductor 21 is improved.

Further, the winding 1 is provided in the groove 15 provided on the side surface 3c.
Since the terminal portion 16a of No. 6 can be housed, the chip inductor 21 can be closely fixed to the surface of the printed circuit board 18 and prevented from rising from the printed circuit board 18, further improving the soldering strength. You can Further, when the chip inductor 21 is to be replaced, since the solder 20 is located outside the chip inductor 21, the solder 20 at the corners can be easily melted by a soldering iron, for example. Like
The chip inductor 21 can be replaced easily and in a short time, as compared with the case where the contact surface with the printed circuit board 18 is soldered.

In the first to third embodiments described above,
The electrode 5 is formed by screen printing, and in the fourth embodiment, it is formed by pressure roller printing, but the present invention is not limited to this. For example, pressure roller printing is used in the first to third embodiments. It goes without saying that screen printing may be used in the fourth embodiment, and an appropriate printing method other than screen printing and pressure roller printing may be adopted.

In each of the above-described embodiments, the case where one electrode 5 is provided on each flange portion 3 of the core 1 has been described. However, for example, when a plurality of windings are wound, the electrode of each flange portion 3 is formed. Two or more electrodes 5 may be formed on the electrode formation surface by dividing the electrode formation surface into a plurality of parts by forming cuts or recesses on the formation surface. In this case, the connection between the electrodes 5 in the same flange portion 3 is prevented by the notch and the recess. Furthermore, the above-mentioned respective embodiments are not limited to the respective embodiments, and it is of course possible to appropriately combine them.

Further, in each of the above-mentioned embodiments, the space forming portion is constituted by the end face shape, the protrusion shape and the side surface shape to form the space such as the concave portion and the gap. However, in the present invention, the adjacent electrode forming surface is formed. It is possible to apply a space forming portion having an appropriate shape such that is not continuous with the electrode paint, and in each of the above-mentioned examples,
Needless to say, the shape and the like of the core are also examples, and various modifications can be made without departing from the scope of the present invention.

[0043]

As described above in detail, in the chip inductor core of the present invention, the space forming portion provided in the flange portion prevents the adjacent cores from sticking to each other during electrode printing. The electrodes can be continuously printed, mass production is possible, and production efficiency can be greatly improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a core for a chip inductor according to the present invention.

FIG. 2 is an explanatory view of the same electrode forming method.

FIG. 3 is a cross-sectional view of an essential part of the same electrode formed state.

FIG. 4 is a perspective view showing a second embodiment of the chip inductor core according to the present invention.

FIG. 5 is an explanatory view of the same electrode forming method.

FIG. 6 is an explanatory view of another electrode forming method.

FIG. 7 is a perspective view showing a modified example of the second embodiment.

FIG. 8 is a perspective view showing still another modified example.

FIG. 9 is a perspective view showing a third embodiment of the chip inductor core according to the present invention.

FIG. 10 is an explanatory view of the same electrode forming method.

FIG. 11 is a perspective view showing a modification of the third embodiment.

FIG. 12 is a perspective view showing another example of the protrusion.

FIG. 13 is a perspective view showing a chip inductor using a core of a fourth embodiment according to the present invention.

FIG. 14 is an explanatory view of an electrode forming method of the core.

FIG. 15 is a sectional view of the same chip inductor in a mounted state.

FIG. 16 is a perspective view of a conventional chip inductor core.

FIG. 17 is a cross-sectional view of the essential parts of the same electrode formation state.

FIG. 18 is an explanatory diagram of the same.

[Explanation of symbols]

 1 ・ ・ ・ ・ ・ Core 2 ・ ・ ・ ・ ・ ・ ・ Winding part 3 ・ ・ ・ ・ ・ ・ ・ Flange part 3a to 3f ・ ・ ・ Side surface 4 ・ ・ ・ ・・ ・ ・ End face 5 ・ ・ ・ ・ ・ ・ Electrode 6 ・ ・ ・ ・ ・ ・ ・ ・ Recess 7 ・ ・ ・ ・ ・ ・ Screen 8 ・ ・ ・ ・ ・ ・Paint 12 ... Protrusion 13 ... Gap 14 ... Arc surface 15 ... Groove 16 ...・ Winding 16a ・ ・ ・ ・ Terminal 17 ・ ・ ・ ・ ・ ・ Pressure roller 18 ・ ・ ・ ・ ・ ・ Printed circuit board 19 ・ ・ ・ ・ ・ ・ Pattern 20 ・ ・ ・・ ・ ・ Solder 21 ・ ・ ・ ・ ・ ・ ・ ・ Chip inductor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Yoshizawa 5-36-1 Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd. (72) Takeo Maeda 5-36-11 Shinbashi, Minato-ku, Tokyo Fuji Electrochemical Co., Ltd.

Claims (5)

[Claims] 1. An electrode comprising: a winding part around which a winding is wound; and flange parts integrally formed at both ends of the winding part, wherein an electrode paint is printed on the electrode forming surface of the flange part to form an electrode. In the core for the chip inductor forming the above, the flange portion is provided with the space forming portion, the electrode forming surfaces of the plurality of cores are positioned in substantially the same plane, and the other side surfaces of the flange portion are adjacent to each other. In this case, the core for a chip inductor is characterized in that the electrode forming surfaces of the adjacent cores are discontinuous by the space forming portion. 2. The space forming portion is an end face formed between an electrode forming surface of the flange portion and a side surface continuous with the electrode forming surface and abutting on another core. The core for a chip inductor according to claim 1. 3. The chip according to claim 1, wherein the space forming portion is a protrusion formed on a side surface continuous with the electrode forming surface of the flange portion, the side surface facing another core. Inductor core. 4. The electrode forming surface is provided on a side surface of the flange portion opposite to a side surface of the flange portion on the winding portion side. The core for the chip inductor according to 3. 5. The chip inductor according to claim 4, wherein a groove for drawing out the winding wire is formed on a side surface located between the electrode forming surface and the side surface on the winding portion side. For core.