JP2002134323A - Inductor component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inductor component which is increased in inductor value, and at the same time, suppress magnetic ally adverse effect exerted upon peripheral parts. SOLUTION: The inductor component has a prism-like body 21, made of a magnetic material, conductor layers 24 respectively covering the side faces 22 and outer peripheral surface 23 of the main body 21, and a coil section 27, in which cut groove sections 25 and linear conductor sections 26 are formed, by spirally grooving the conductor layer 24 covering the outer peripheral surface 23 of the body 21. The component also has electrode sections 28 composed of the conductor layers 24 covering both end sections 29 of the body 21 and a magnetic body section 31 provided on the coil section 27 and made of a magnetic material. The magnetic body section 31 is constituted of a sintered magnetic material, formed by sintering the magnetic material, and at the same time, the conductor layers 24 are constituted of conductors, having melting points higher than the sintering temperature of the sintered magnetic material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductor component used for electronic equipment, communication equipment and the like.

[0002]

2. Description of the Related Art A conventional inductor component will be described below with reference to the drawings.

A conventional inductor is disclosed in Japanese Patent Application Laid-Open No. 9-5 / 1997.
What is described in 5321 gazette is known.

FIG. 7 is a perspective view of a conventional inductor component, FIG. 8 is a perspective view of a main body of the inductor, and FIG. 9 is a sectional view of the inductor.

Referring to FIGS. 7 to 9, a conventional inductor comprises a columnar main body 11 made of an insulating material,
, A groove portion 13 formed by cutting the conductor layer 12, a coil portion 14 formed by spirally forming the groove portion 13, and electrode portions provided at both ends of the main body 11. 1
6 and an exterior part 15 made of an insulating resin that covers the coil part 14.

Further, a concave portion 18 is provided with a step 17 between both end portions of the main body 11, and the coil portion 14 is formed in the concave portion 18.

Further, non-exterior portions which are not coated with an insulating resin are provided on both end surfaces of the main body 11, and the electrode portions 16 are electrically connected to the end surfaces of the main body 11 through the conductor layer 12 in the non-exterior portions. This is the configuration.

[0008]

In the above-mentioned conventional configuration,
The magnetic flux generated in the main body 11 by the coil part 14 leaks from the electrode part 16 as it is.

As a result, there has been a problem that the inductor value cannot be increased, and the leaked magnetic flux has a magnetic adverse effect on peripheral components.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an inductor component in which the value of the inductor is increased and adverse magnetic effects on peripheral components are suppressed.

[0011]

To achieve the above object, the present invention has the following arrangement.

In the invention according to claim 1 of the present invention, in particular, a magnetic body portion made of a magnetic material is provided on the coil portion,
The magnetic part is a sintered magnetic body formed by sintering a magnetic material, and the conductor layer is a conductor having a melting point higher than the sintering temperature of the sintered magnetic body.

According to the above configuration, since the magnetic portion made of a magnetic material is provided on the coil portion, the magnetic flux generated in the main body by the coil portion passes through the magnetic portion from the main body and passes through the main body again. Since a closed magnetic circuit loop is formed between the magnetic body and the main body, the inductor value can be increased, the magnetic flux does not easily leak, and the adverse magnetic effect on peripheral components can be suppressed.

In particular, since the magnetic portion is a sintered magnetic material formed by sintering a magnetic material, the magnetic permeability is increased, the inductor value can be increased, and the adverse magnetic effect on peripheral components is further suppressed. it can.

Further, since the conductor layer is a conductor having a melting point higher than the sintering temperature of the sintered magnetic material, even if a magnetic material is disposed on the coil portion and sintered, Since there is no melting of the layer, it is possible to prevent a short circuit or poor connection due to the melting of the conductor layer from occurring, and the conduction reliability of the conductor layer is not deteriorated.

At this time, if the magnetic material is mixed with an organic solvent or the like, and is arranged in a paste form on the coil portion, the magnetic material can be arranged even in a complicated shape, and the magnetic material portion and the main body can be arranged. And the closed magnetic circuit loop can be formed more accurately, and the inductor value can be increased.

The second aspect of the present invention is the first aspect.
In the invention described above, a concave portion for arranging the coil portion is provided between both ends of the main body.

According to the above configuration, since the magnetic portion is surrounded by both ends of the main body, magnetic flux easily passes from the main body to the magnetic portion, the magnetic permeability increases, and the inductor value can be further increased.

The third aspect of the present invention provides the first aspect.
In the invention described above, a concave portion for disposing the coil portion is provided between both ends of the main body, and a magnetic body portion is provided in the concave portion.

According to the above configuration, since the magnetic portion is provided in the concave portion, it does not protrude from both ends of the main body, so that the flatness can be improved.

[0021] The invention described in claim 4 of the present invention is claim 1.
In the invention described above, particularly, a configuration is provided in which a conductor layer removing portion that removes the conductor layer and exposes the main body is provided between the coil portion and the electrode portion.

According to the above configuration, when the magnetic flux generated in the coil portion passes from the main body to the magnetic body portion, the magnetic flux passes through the conductor layer removing portion. , The magnetic permeability increases, and the inductor value can be further increased.

The invention according to claim 5 of the present invention is the invention according to claim 1.
In the invention described, in particular, between the coil portion and the electrode portion, while providing a conductor layer removal portion to remove the conductor layer to expose the main body, also provided a magnetic body portion in the conductor layer removal portion, The main body and the magnetic body are in contact with each other.

According to the above configuration, when the magnetic flux generated in the coil portion passes from the main body to the magnetic body portion, the magnetic flux passes through the conductor layer removing portion. , The magnetic permeability increases, and the inductor value can be further increased.

In particular, since the magnetic portion is provided also in the conductor layer removed portion and the main body and the magnetic portion are in contact with each other, the magnetic flux can pass more easily, and the inductor value can be increased.

The present invention according to claim 6 of the present invention is directed to claim 5
In the invention described above, particularly, the main body and the magnetic body portion are configured to be melt-bonded to each other and brought into contact so as to be integrated.

According to the above configuration, since the main body and the magnetic body portion are fused and integrated with each other, there is almost no interface between the main body and the magnetic body portion, so that the magnetic flux can pass more easily.
The inductor value can be further increased.

The invention according to claim 7 of the present invention is directed to claim 5
In the invention described in the above, in particular, the main body is formed in a prismatic shape, the conductor layer removing portion is provided on one opposing surface of the main body, and the magnetic body portion is provided on the coil portion on the one opposing surface of the main body It is.

With the above structure, the main body to the magnetic body portion
Most of the magnetic flux passes through the conductor layer removing part provided on one opposing surface, and the way of transmitting the magnetic flux can be made symmetrical, so that the magnetic flux passes efficiently, the magnetic permeability increases, and the inductor The value can be increased.

In particular, since no magnetic flux passes through the other opposing surface, if the mounting is performed so that one opposing surface is located on the left and right with respect to the mounting substrate, the wiring pattern and the solder connection portion of the mounting substrate can be reduced. It can be less affected.

The invention according to claim 8 of the present invention is directed to claim 7
In the invention described above, in particular, a configuration is provided in which an exterior portion made of an insulating resin is provided on the coil portion on the other facing surface of the main body.

According to the above configuration, the coil portion can be protected by the exterior portion made of insulating resin.

The ninth aspect of the present invention provides the seventh aspect of the present invention.
In the invention described in the above, the exterior part made of glass is particularly provided on the coil part on the other facing surface of the main body.

With the above configuration, the coil portion can be protected by the exterior portion made of glass.

According to a tenth aspect of the present invention, in the first aspect, a non-magnetic material portion made of a non-magnetic material is provided between the coil portion and the magnetic material portion.

According to the above configuration, a non-magnetic material portion made of a non-magnetic material is provided between the coil portion and the magnetic material portion.
The grooved portion of the coil portion and the vicinity of the linear conductor portion are covered with a non-magnetic material portion, and between the linear conductor portions adjacent to the coil portion, a closed magnetic path loop due to the passage of magnetic flux is not formed. Most of the magnetic flux generated by the coil portion passes from the main body to the magnetic body portion and from the magnetic body portion to the main body to form a closed magnetic circuit loop, so that the magnetic permeability increases and the inductor value can be further increased.

According to an eleventh aspect of the present invention, in the tenth aspect of the present invention, the non-magnetic portion is particularly filled in the groove of the coil portion.

According to the above configuration, since the non-magnetic material portion is also filled in the groove cut portion of the coil portion, a magnetic flux passes between adjacent linear conductor portions of the coil portion to form a closed magnetic circuit loop. Most of the magnetic flux generated by the coil portion passes from the main body to the magnetic body portion and from the magnetic body portion to the main body to form a closed magnetic circuit loop, so that the magnetic permeability increases and the inductor value increases. Can be larger.

According to a twelfth aspect of the present invention, in the tenth aspect of the present invention, in particular, the non-magnetic portion is provided in a layered manner between the coil portion and the magnetic portion, and the non-magnetic portion is It is a glass configuration.

According to the above configuration, since the non-magnetic material portion is provided in a layer between the coil portion and the magnetic material portion, the magnetic flux passes between the adjacent linear conductor portions over the entire coil portion. The resulting closed magnetic circuit loop is not formed,
Since the magnetic flux generated by the coil portion more easily passes from the main body to the magnetic body portion, and forms a closed magnetic circuit loop from the main body to the magnetic body portion and from the magnetic body portion to the main body, the magnetic permeability is increased, and the inductor is further increased. The value can be increased.

In particular, since the non-magnetic material portion is made of glass, the magnetic flux generated by the coil portion can easily pass from the main body to the magnetic material portion, so that a closed magnetic circuit loop can be formed accurately and the magnetic permeability can be increased. Inductor value can be increased.

Further, since the magnetic portion is a sintered magnetic material obtained by sintering a magnetic material, there are many minute gaps and the like, and moisture in the air is absorbed by the gaps and the like, and the inside of the magnetic portion passes through. There is a risk of corroding the coil part, but since glass is provided in a layer between the coil part and the magnetic body part,
The absorption of moisture in the air can be suppressed, and the adhesion of moisture to the coil portion can be prevented.

According to a thirteenth aspect of the present invention, in the tenth aspect, in particular, the non-magnetic portion is provided in a layered manner between the coil portion and the magnetic portion, and the non-magnetic portion is The configuration is air.

According to the above configuration, since the non-magnetic material portion is made of air, the magnetic flux generated by the coil portion can easily pass from the main body to the magnetic material portion, so that a closed magnetic circuit loop can be formed accurately and the magnetic permeability can be increased. Thus, the inductor value can be further increased.

According to a fourteenth aspect of the present invention, in the tenth aspect of the present invention, in particular, the non-magnetic portion is provided in a layer between the coil portion and the magnetic portion, and the non-magnetic portion is The structure is ceramic.

According to the above configuration, since the non-magnetic material portion is made of ceramic, the magnetic flux generated by the coil portion can easily pass from the main body to the magnetic material portion, so that a closed magnetic circuit loop can be formed accurately and the magnetic permeability can be increased. Thus, the inductor value can be further increased.

According to a fifteenth aspect of the present invention, in the invention according to the fifth aspect, in particular, the total area of the main body facing area of the magnetic body part facing the main body in the conductor layer removed portion is such that the coil portion is formed. It is configured to have a size equal to or larger than the radial cross-sectional area of the main body facing the position.

According to the above configuration, the magnetic flux generated in the coil portion passes efficiently from the main body to the magnetic portion without being saturated, so that the magnetic permeability increases and the inductor value can be increased.

According to a sixteenth aspect of the present invention, in the invention according to the fifth aspect, in particular, the total area of the outer peripheral cross-sectional area of the coil portion of the magnetic material portion provided on the coil portion is determined by the position where the coil portion is formed. And a size larger than the diameter cross-sectional area of the main body facing the main body.

According to the above configuration, the magnetic flux generated in the coil portion is efficiently passed from the main body to the magnetic portion without being saturated, so that the magnetic permeability is increased and the inductor value can be increased.

According to a seventeenth aspect of the present invention, in the first aspect of the present invention, the magnetic material of the main body and the magnetic material of the magnetic body are sintered ferrite obtained by sintering a ferrite material. It is.

With the above configuration, the magnetic permeability is increased,
Inductor value can be increased.

According to the eighteenth aspect of the present invention, in the first aspect of the present invention, in particular, the main body and the magnetic body are made of N.
The sintered magnetic body is made of sintered ferrite obtained by sintering an i-Zn ferrite material, and the conductor layer is made of a conductor made of Ag or Ag-Pd.

With the above configuration, when the magnetic material is sintered at the sintering temperature, adverse effects due to the heat of sintering are less likely to occur in the conductor layer, and the conduction reliability of the conductor layer can be improved.

[0055]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) The invention described in all claims of the present invention will be described below with reference to the drawings.

FIG. 1 is a front sectional view of an inductor component according to an embodiment of the present invention, FIG. 2 is a plan sectional view of the inductor component, FIG. 3 is a perspective view of the inductor component, and FIG. Perspective view of the body coated with layers, FIG.
FIG. 4 is an explanatory diagram showing a flow of a magnetic flux generated by a coil portion of the inductor component.

Referring to FIGS. 1 to 5, an inductor component according to an embodiment of the present invention includes a prismatic main body 21 made of a magnetic material, a side surface 22 and an outer peripheral surface 2 of the main body 21.
3 and the conductor layer 24 coated on the outer peripheral surface 23 of the main body 21 are spirally grooved and cut by a laser to form a coil portion 27 in which a grooved portion 25 and a linear conductor portion 26 are formed.
And an electrode portion 28 made of the conductor layer 24 covering both end portions 29 of the main body 21.

The column-shaped main body 21 is provided with a concave portion 3 between both ends 29.
The coil portion 27 is disposed in the concave portion 30.

A magnetic portion 31 made of a magnetic material is provided on the coil portion 27. The magnetic portion 31 is a sintered magnetic material formed by sintering a magnetic material. The conductor has a melting point higher than the sintering temperature of the sintered magnetic body.

At this time, the main body 21 and the magnetic body 31 are made of a sintered magnetic body made of sintered ferrite obtained by sintering a Ni—Zn ferrite material, and the conductor layer 24 is made of A
The conductor is formed by electrolytic plating of g or Ag-Pd with a thickness of 10 to 30 μm.

Further, between the coil portion 27 and the electrode portion 28, there is provided a conductor layer removing portion 32 from which the conductor layer 24 is removed to expose the main body 21, and a magnetic material is also provided in the conductor layer removing portion 32. The main body 21 and the magnetic body 31 are brought into contact with each other. In particular, the conductor layer removing portion 32 is provided on the opposing surface 33 of the main body 21 facing each other, and the magnetic body portion 31 is also provided on the coil portion 27 on the one opposing surface 33 of the main body 21. Are melt-bonded to each other so as to be integrated.

At this time, a non-magnetic portion 34 made of glass as a non-magnetic material is provided in a layer between the coil portion 27 and the magnetic portion 31 on one opposing surface 33 of the main body 21.
The nonmagnetic portion 34 is also filled in the groove 25 of the coil portion 27, and an exterior portion 37 made of glass is provided in a layer on the coil portion 27 on the other facing surface 36 of the main body 21.

Then, in the conductor layer removing portion 32 provided between the coil portion 27 and the electrode portion 28 at one end, the main body 21 is removed.
The total area of the main body facing area (B) of the magnetic body part 31 facing the coil section 27 is larger than the radial cross-sectional area (A) of the main body 21 facing the position where the coil section 27 is formed. The total area of the outer peripheral cross-sectional area (C) of the coil portion of the provided magnetic body portion 31 is larger than the radial cross-sectional area of the main body 21 facing the position where the coil portion 27 is formed.

The operation of the inductor component having the above configuration will be described below.

According to the above configuration, since the magnetic portion 31 made of a magnetic material is provided on the coil portion 27, the magnetic flux (X) generated in the main body 21 by the coil portion 27 is transferred from the main body 21 to the magnetic portion 31. And the magnetic flux (Y) passing around the linear conductor portion 26 of the coil portion 27 almost disappears, and the closed magnetic circuit loop is formed between the magnetic body portion 31 and the main body 21. Is formed, the inductor value can be increased, the magnetic flux (X) does not easily leak, and the adverse magnetic effect on peripheral components can be suppressed.

In particular, since the magnetic material portion 31 is a sintered magnetic material formed by sintering a magnetic material, the magnetic permeability is increased, the inductor value can be increased, and the magnetic adverse effect on peripheral components is further reduced. Can be suppressed.

Since the conductor layer 24 is a conductor having a melting point higher than the sintering temperature of the sintered magnetic material, even if a magnetic material is disposed on the coil portion 27 and sintered, , The short circuit and the connection failure caused by the melting of the conductor layer 24 can be prevented, and the conduction reliability of the conductor layer 24 does not deteriorate.

At this time, if the magnetic material is mixed into an organic solvent or the like, and is arranged in a paste form on the coil portion 27, the magnetic material can be arranged even in a complicated shape. A closed magnetic circuit loop can be formed more accurately between the body and the main body 21, and the inductor value can be increased.

Since the concave portion 30 for disposing the coil portion 27 is provided between both end portions 29 of the main body 21, the magnetic body portion 31 is surrounded by both end portions 29 of the main body 21.
As a result, the magnetic flux (X) easily passes through the magnetic body portion 31, the magnetic permeability increases, and the inductor value can be further increased.
In particular, since the magnetic body 31 is provided in the recess 30, it does not protrude beyond both ends 29 of the main body 21, and the flatness can be improved.

Further, between the coil portion 27 and the electrode portion 28, a conductor layer removing portion 32 is provided in which the conductor layer 24 is removed to expose the main body 21, and a magnetic material portion is also provided in the conductor layer removing portion 32. Since the main body 21 and the magnetic body 31 are in contact with each other, when the magnetic flux (X) generated in the coil 27 passes from the main body 21 to the magnetic body 31, the conductor layer removing section 3 is provided.
2, the magnetic flux (X) passes therethrough, and the conductor layer 24 does not hinder the passage of the magnetic flux (X), so that the magnetic flux (X) can pass efficiently, the magnetic permeability increases, and the inductor value increases. Can be larger.

In particular, since the main body 21 and the magnetic body portion 31 are melt-bonded to each other and integrated and brought into contact with each other,
Since there is almost no interface between the magnetic material 1 and the magnetic material portion 31, the magnetic flux (X) is more easily transmitted, and the inductor value can be further increased.

Further, the main body 21 is formed into a prism shape,
The conductor layer removing portion 32 is provided on one opposing surface 33 of the main body 21, and the magnetic body portion 31 is similarly provided in the conductor layer removing portion 3.
2 is provided on the coil portion 27 of the one opposing surface 33 where the magnetic flux (X) is transmitted from the main body 21 to the magnetic body portion 31 via the conductor layer removing portion 32 provided on the one opposing surface 33.
And the magnetic flux (X) can be transmitted symmetrically, and the magnetic flux (X) can be efficiently passed, the magnetic permeability can be increased, and the inductor value can be increased.

In particular, since only the protective glass is formed on the other facing surface 36 as the exterior part 37, the magnetic flux (X) does not pass through the glass on the coil part 27,
If the mounting is performed such that the one opposing surface 33 provided with the magnetic body portions 31 on the left and right sides with respect to the mounting board, it is possible to reduce the influence of the wiring pattern and the solder connection portion of the mounting board.

Further, a non-magnetic material portion 34 made of a non-magnetic material is provided between the coil portion 27 and the magnetic material portion 31, and the non-magnetic material portion 34 is also filled in the groove 25 of the coil portion 27. Therefore, the vicinity of the groove cut portion 25 and the linear conductor portion 26 of the coil portion 27 is covered with the non-magnetic material portion 34, and the magnetic flux (X) is transmitted between the adjacent linear conductor portions 26 of the coil portion 27. Most of the magnetic flux (X) generated by the coil portion 27 passes from the main body 21 to the magnetic body portion 31 and from the magnetic body portion 31 to the main body 21 without forming a closed magnetic circuit loop. Therefore, the magnetic permeability increases, and the inductor value can be further increased.

In particular, since the non-magnetic portion 34 is provided in a layered manner between the coil portion 27 and the magnetic portion 31 and the non-magnetic portion 34 is made of glass, the above-mentioned effect is further improved, and Since the portion 31 is a sintered magnetic material obtained by sintering a magnetic material, there are many minute voids and the like, and moisture in the air is absorbed by these voids and the like, and the coil portion 27 is passed through the inside of the magnetic body portion 31. May corrode,
Since glass is provided in a layer between the coil portion 27 and the magnetic body portion 31, absorption of moisture in the air can be suppressed, and the coil portion 2
7 can be prevented from adhering moisture.

The total area of the main body facing area (B) of the magnetic body portion 31 facing the main body in the conductor layer removed portion 32 is the radial cross-sectional area (A) of the main body 21 facing the position where the coil portion 27 is formed. ), And the total area of the outer peripheral cross-sectional area (C) of the coil portion of the magnetic body portion 31 provided on the coil portion 27 is equal to the main body 2 facing the position where the coil portion 27 is formed.
1, the magnetic flux (X) generated in the coil portion 27 passes efficiently from the main body 21 to the magnetic body portion 31 without being saturated, so that the magnetic permeability is large. Therefore, the inductor value can be increased.

In addition, the main body 21 and the magnetic body 31
A sintered magnetic body made of sintered ferrite obtained by sintering an i-Zn-based ferrite material, and the conductor layer 24 is made of Ag
Alternatively, since the conductor is made of Ag-Pd, when the magnetic material is sintered at the sintering temperature, adverse effects due to heat of sintering are less likely to occur in the conductor layer 24, and the conduction reliability of the conductor layer 24 is improved. it can.

As described above, according to the embodiment of the present invention, the magnetic flux (X) generated in the main body 21 by the coil portion 27 passes through the magnetic body portion 31 from the main body 21 and passes through the main body 21 again. The magnetic body 31 and the main body 2
1 to form a closed magnetic circuit loop, so that the inductor value can be increased and the magnetic flux (X) hardly leaks.
Magnetic adverse effects on peripheral components can also be suppressed.

Further, it is possible to prevent the occurrence of a short circuit or connection failure due to melting of the conductor layer 24 and the corrosion of the coil portion 27 due to moisture absorbed in the sintered magnetic material.
4 can be prevented from deteriorating the conduction reliability.

Further, since the magnetic flux (X) does not pass through the other opposing surface 36, the one opposing surface 33 (the surface on which the magnetic body portion 31 is provided) is located on the left and right with respect to the mounting board during mounting. In this case, it is possible to reduce the influence of the wiring pattern of the mounting board and the solder connection portion.

In the embodiment of the present invention, the non-magnetic part 34 provided in a layer between the coil part 27 and the magnetic part 31 is made of glass. However, the same effect can be obtained by using air or ceramic. Obtainable.

Although the exterior part 37 made of glass is provided on the coil part 27 on the other facing surface 36 of the main body 21, the same effect can be obtained by using an insulating resin.

Further, the vicinity of the contact portion between the both ends 29 of the main body 21 and the magnetic body portion 31 is brought into contact via the conductor layer 24 which covers the both ends 29 and forms the electrode portion 28. As shown in FIG. 6, both ends 29 of the main body 21 and the magnetic body 31 may be in direct contact with each other.

[0084]

As described above, according to the present invention, the magnetic flux generated in the main body by the coil portion passes through the magnetic body portion from the main body and passes through the main body again, and the magnetic body portion and the main body Since a closed magnetic circuit loop is formed between the coil and the coil, it is possible to provide an inductor component that can increase the inductor value, hardly leaks magnetic flux, and suppresses adverse magnetic effects on peripheral components.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an inductor component according to an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of the inductor component.

FIG. 3 is a perspective view of the inductor component.

FIG. 4 is a perspective view of a main body covered with a conductor layer of the inductor component.

FIGS. 5A and 5B are cross-sectional views illustrating the flow of magnetic flux generated by a coil portion of the inductor component.

FIG. 6 is a front sectional view of another inductor component.

FIG. 7 is a perspective view of a conventional inductor component.

FIG. 8 is a perspective view of a main body of the inductor.

FIG. 9 is a sectional view of the inductor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Main body 22 Side surface 23 Outer peripheral surface 24 Conductive layer 25 Groove part 26 Linear conductor part 27 Coil part 28 Electrode part 29 Both ends 30 Concave part 31 Magnetic part 32 Conductive layer removal part 33 One facing surface 34 Non-magnetic part 36 Others Opposing surface 37 Exterior

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Hiromasa Yamamoto 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5E070 AA01 AB01 AB04 BA03 BB01 CB01 CC01 CC03 EA01

Claims (18)

[Claims] 1. A pillar-shaped main body made of a magnetic material, a conductor layer covering the side surface and the outer peripheral surface of the main body, and the conductor layer covering the outer peripheral surface of the main body are helically grooved and cut.
A coil portion having a grooved portion and a linear conductor portion, and an electrode portion made of the conductor layer covering both ends of the main body, and a magnetic body portion made of a magnetic material is provided on the coil portion. The magnetic body portion is a sintered magnetic body formed by sintering a magnetic material, and the conductor layer is a conductor having a melting point higher than a sintering temperature of the sintered magnetic body. parts. 2. The inductor component according to claim 1, wherein a concave portion for arranging the coil portion is provided between both ends of the main body. 3. The inductor component according to claim 1, wherein a concave portion for disposing the coil portion is provided between both ends of the main body, and a magnetic body portion is provided in the concave portion. 4. The inductor component according to claim 1, further comprising a conductor layer removed portion between the coil portion and the electrode portion, the conductor layer being removed to expose the main body. 5. A method according to claim 1, further comprising: providing a conductor layer removing portion between said coil portion and said electrode portion, said conductor layer being removed to expose a main body, and a magnetic body portion also being provided inside said conductor layer removing portion. The inductor component according to claim 1, wherein the inductor part contacts the magnetic body. 6. The inductor component according to claim 5, wherein the main body and the magnetic body portion are brought into contact with each other by being fused and integrated with each other. 7. The main body is formed in a prismatic shape, the conductor layer removing portion is provided on one opposing surface of the main body, and the magnetic body portion is provided on the coil portion on the one opposing surface of the main body. The described inductor component. 8. The inductor component according to claim 7, wherein an exterior portion made of an insulating resin is provided on the coil portion on the other facing surface of the main body. 9. The inductor component according to claim 7, wherein an exterior part made of glass is provided on the coil part on the other facing surface of the main body. 10. The inductor component according to claim 1, wherein a non-magnetic material portion made of a non-magnetic material is provided between the coil portion and the magnetic material portion. 11. The inductor component according to claim 10, wherein the non-magnetic material portion is also filled in a groove portion of the coil portion. 12. The inductor component according to claim 10, wherein the non-magnetic portion is provided in a layered manner between the coil portion and the magnetic portion, and the non-magnetic portion is made of glass. 13. The inductor component according to claim 10, wherein the non-magnetic portion is provided in a layered manner between the coil portion and the magnetic portion, and the non-magnetic portion is air. 14. The inductor component according to claim 10, wherein the non-magnetic portion is provided in a layered manner between the coil portion and the magnetic portion, and the non-magnetic portion is made of ceramic. 15. In a conductor layer removed portion provided between a coil portion and an electrode portion at one end, the total area of the main body facing area of the magnetic body portion facing the main body is the position where the coil portion is formed. 6. The inductor component according to claim 5, wherein the size is equal to or larger than the diameter cross-sectional area of the opposed main body. 16. The inductor according to claim 5, wherein the total area of the outer peripheral cross-sectional area of the coil portion of the magnetic body portion provided on the coil portion is equal to or larger than the radial cross-sectional area of the main body facing the position where the coil portion is formed. parts. 17. The inductor component according to claim 1, wherein the magnetic material of the main body and the magnetic material of the magnetic body are sintered ferrite obtained by sintering a ferrite material. 18. A sintered body made of sintered ferrite obtained by sintering a Ni—Zn-based ferrite material for a main body and a magnetic body, and a conductor layer made of Ag or Ag—Pd.
The inductor component according to claim 1, wherein the inductor component is a conductor made of: