JPH09260162A - Coil part and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide coil parts which exhibit excellent properties. SOLUTION: Coil parts has conductors 2 comprised of several turns in a nonmagnetic substance 1. The diameter of each turn part gradually changes from one end to the other in the non-magnetic substance 1 on a hollow conductor supporter 3. The turn parts are placed on different surfaces of the conductors 2. The coil parts with this construction have excellent electrical properties which can make the floating capacity between the conductors 2 and the DC resistance of the conductors 2 small and can easily be manufactured with a small number of man-hours.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil component used for various electronic devices and communication devices, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Coil components are widely used as coils and transformers for various electronic devices and communication devices. In recent years, small or thin coil components have been increasingly required. As a result, coil components as noise suppression components are becoming more and more important.

As a conventional coil component satisfying these demands, a laminated coil component obtained by alternately laminating a ferrite magnetic layer and a coil conductor layer (for example, Japanese Patent Publication No.
39521).

In this laminated coil component, a ferrite layer 21 is formed by printing on a half of a ferrite green sheet 20 as shown in FIGS. 10 and 11, and a portion without the ferrite layer 21 and a portion of the ferrite layer 21 are formed. An L-shaped conductor pattern 22 is formed by printing on, and about half the ferrite layer 23 of the green sheet 20 is printed on the conductor pattern 22, and the ferrite layer 21 and the ferrite layer 21 are continuous with the conductor pattern 22. A U-shaped conductor pattern 24 is printed on a part of 23, and this process is repeated several times to collectively fire a laminate of the ferrite green sheet 20 on the uppermost layer, and end face electrodes 25 are formed on both ends of this laminate. Formed and configured.

[0005]

In the above configuration, in order to obtain a large inductance, it is necessary to increase the number of turns of the conductor pattern, and an extremely large number of ferrite layers 21, 23 and conductor patterns 22, 24 are laminated. It is necessary to print, and there is a problem in productivity due to an increase in the number of production steps. Further, since the conductor patterns 24 are formed so as to face each other via the ferrite layer 23, the stray capacitance between the conductor patterns is large. Thus, the coil component has problems such as a low self-resonant frequency and a low withstand voltage.

Further, in this laminated coil component, since the conductor pattern is formed on a part of the ferrite layer, if the thickness of the conductor pattern is increased in order to reduce the coil conductor resistance, the overall thickness becomes smaller than the conductor pattern 22. , 24 are significantly different from each other, and even if fired, cracks occur and a coil component of stable quality cannot be obtained.

An object of the present invention is to provide a coil component which eliminates the above-mentioned drawbacks of the prior art, is excellent in productivity, has a small stray capacitance and is excellent in electric characteristics, and a method for manufacturing the same.

[0008]

In order to solve the above-mentioned problems, the coil component of the present invention has a non-magnetic material on the surface of a conductor support, and further comprises a plurality of turns in the non-magnetic material. The diameter is gradually changed from one end to the other end, and at least each turn portion has conductors located in different planes.

According to the present invention, a coil component having excellent productivity and excellent electrical characteristics can be obtained.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention has a non-magnetic material on the surface of a conductor support, and further comprises a plurality of turns in the non-magnetic material, and the diameter of each turn portion is from one end to the other. It is configured to have conductors that gradually change toward the other end and at least each turn portion is located in a different plane, which is easy to produce and has a small stray capacitance between each turn portion of the conductor and excellent electrical characteristics. can do.

According to a second aspect of the present invention, a step of forming a hollow conductor support having a conical or pyramidal hollow portion provided at the center, and a conical or pyramidal conductor support are formed. Any one or both of the steps, the step of forming a non-magnetic material on the inner surface of the hollow conductor support or on the surface of the conical or pyramidal conductor support, and on the non-magnetic material A step of forming a conductor such that the diameter of each turn portion is made up of a plurality of turns and gradually changes from one end to the other end, and at least each turn portion is located in a different plane; and a step of further forming a non-magnetic material on the conductor It is a method of manufacturing a coil component having, and is easy to produce, and the obtained coil component has a small stray capacitance between each turn portion of the conductor and excellent electrical characteristics.

According to a third aspect of the present invention, a step of forming a hollow conductor support having a conical or pyramidal hollow portion provided at the center, and a conical or pyramidal conductor support are formed. The step of forming a non-magnetic material on the inner surface of the hollow conductor support or on the surface of a conical or pyramid-shaped conductor support, and the diameter of each turn part consisting of multiple turns on the non-magnetic material A step of forming a conductor so that it gradually changes from one end to the other and at least each turn portion is located in a different plane; a step of further forming a non-magnetic material on the conductor; and a conical or pyramidal hollow portion. A method of manufacturing a coil component, the method comprising the steps of fitting a hollow-body-shaped conductor support provided in the center and a cone-shaped or pyramid-shaped conductor support, and by fitting two conductor supports. It can be obtained components, easy production, yet the resulting coil component can be made stray capacitance between the turns of the conductor is superior in reduced electrical properties.

The coil component of the present invention is a coil component comprising a plurality of turns in a non-magnetic body, and the diameter of each turn portion gradually changes from one end to the other end, and at least each turn portion has a conductor located in a different plane. is there. As an example of the shape of one conductor forming the coil component, that is, one way of winding, there is a conductor consisting of a plurality of turns in a non-magnetic body, and the diameter of each turn part gradually increases from one end to the other end. The turn portions are located on different planes. In other words, one end of the conductor is formed as a circle with a small diameter, and a circle whose diameter gradually increases toward the other end, and each turn portion rises or falls at the end or start end and is adjacent to the next turn portion. Is connected to Therefore, each turn portion is located on the same plane, and adjacent turn portions are located on different plane portions depending on rising and falling portions, and are set to have different diameters. About 1 in the same plane
Turns, where each turn refers to a conductor present in the same plane.

Further, as another example of the conductor shape, similarly, there is a conductor composed of a plurality of turns in a non-magnetic body, and the diameter of the conductor gradually increases from one end to the other end, and the positions thereof are all in different planes. There is a three-dimensional spiral wound located.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a sectional view of a typical coil component of the present invention. A plurality of conductors 2 each having a plurality of turns are provided in the non-magnetic body 1, and the conductors 2 are such that the diameter of each turn portion gradually changes from one end to the other end, and at least each turn portion is located in a different plane. The non-magnetic body 1 is supported by an outer conductor support 3 located outside the non-magnetic body 1 and an inner conductor support 4 located inside the non-magnetic body 1.
One end of each of the conductors 2 is connected to the extraction electrodes 5 and 6, and the extraction electrodes 5 and 6 are connected to the end surface layers 9 and 10 or the end surface electrodes 7 and 8 provided on the side surface of the outer conductor support 3, respectively. Has been done. Here, each of the non-magnetic body 1, the conductor supports 3 and 4 or the end face layers 9 and 10 is made of one kind of material. Conductor support 3, 4 or end face layer 9,
10 may be a magnetic substance or a non-magnetic substance.

The non-magnetic material may be any material having electrical insulation such as an organic insulating material such as glass epoxy or polyimide, or an inorganic insulating material such as glass, glass ceramics or ceramics. You may.

As the magnetic material, NiZn or NiZnC
Any ferrite material having a generally high magnetic permeability, such as a u-based material, may be used.

Any material may be used as the material of the conductor 2 or the extraction electrodes 5 and 6 as long as it is an electrically good conductor, but copper is necessary because a coil component is required to have low resistivity and low resistance.
Conductive materials such as silver and palladium alloys or silver are effective.

The end face electrodes 7 and 8 may be made of a conductive material, but generally, it is desirable that the end face electrodes 7 and 8 are composed of a plurality of layers instead of a single layer, and in the case of surface mounting, they are mounted on a printed wiring board. It is necessary to consider the mounting strength at the time of soldering, the wettability of solder at the time of mounting, solder cracking, etc. Specifically, use the same conductive material as the extraction electrodes 5 and 6 for the bottom layer, and to the solder for the intermediate layer. And nickel having high resistance to the solder, and solder or tin having good wettability to solder are used for the outermost layer.

However, this is an example, and it is not always necessary to adopt this configuration, and a conductive resin material may be included in addition to a material having excellent conductivity such as metal.

A predetermined wiring pattern is formed on a ceramic substrate such as alumina or ferrite, a window is provided on the ceramic substrate to insert a coil component, and the wiring pattern and the end face electrodes 7 and 8 of the coil component are brought into contact with each other to form a thick film. Since it is fired using the formation process and electrically connected, heat resistance can be improved and a structure corresponding to this thick film formation process can be considered.

The cross-sectional shape of the conductor 2 is not limited to a flat rectangular shape, and the cross-sectional area of the conductor 2 can be increased to reduce the conductor resistance and can be used for large current. In this case, as the cross-sectional shape of the conductor 2, various shapes such as a triangle, a circle, an ellipse, a semicircle, a polygon, and an oval are possible. In order to obtain the conductor 2 having such a cross-sectional shape, for example, a stepped step portion is provided on the inner surface of the outer conductor support body 3, the nonmagnetic paste is applied and dried on the step portion, and then the conductive paste is applied. The conductor 2 having a triangular cross section can be realized by drying and then applying and drying the nonmagnetic paste.

Further, as the overall shape of the conductor 2, an example of a circular shape has been shown so far, but a rectangular shape or the like may be used. In other words, the prismatic shape is originally preferred as the surface-mount type coil component, and in the prismatic coil component, it is necessary to form the square-shaped turn portion that is full of the outer shape of the coil component by forming the prismatic turn portion. Will be possible. To obtain such a conductor 2, for example, a pyramidal hollow portion is formed in the outer conductor support body 3, the non-magnetic body 1 and the conductor 2 are formed on the inclined surface of the hollow portion, and the hollow portion is further formed. By filling the portion with the conductor support 4, a square turn portion can be formed in the non-magnetic body 1.

As described in some examples above, the conductors 2 in which the diameter of each turn portion gradually changes from one end to the other end and at least each turn portion is located in a different plane are continuous in the non-magnetic body 1. Unlike the conventional laminated structure, it is easy to produce due to the structure formed in 1., the yield can be improved, and the neighboring turn parts are made of the non-magnetic material 1.
Since it does not face each other through the stray capacitance, the generation of stray capacitance can be suppressed to the minimum, and it can be prevented that the self-resonance frequency becomes small and high attenuation cannot be obtained in a wide band when used as a filter. The coil component can be remarkably excellent in performance.

In the above embodiment, only the surface mounting type in which the end surface electrodes 7 and 8 are provided at both ends has been described. However, the conductor supporting body 3 or the like in which pin terminals are implanted, or the end surface electrodes are arranged. It is also possible to form a lead-type coil component in which cap-shaped electrodes having terminals instead of electrodes are fitted and coupled to both ends of the conductor support 3 or the like.

Next, a method for manufacturing the coil component of the present invention will be described. The coil component manufacturing method of the present invention includes a step of forming a hollow conductor-shaped conductor support 3 having a conical or pyramidal hollow portion in the center, and a conical or pyramidal conductor support 4. Any one or both of the steps, the step of forming the non-magnetic body 1 on one of the inner surface of the conductor support 3 or the surface of the conductor support 4, and each turn consisting of a plurality of turns on the non-magnetic body 1. From the step of forming the conductor 2 such that the diameter of the portion gradually changes from one end to the other and at least the respective turn portions are located in different planes, and the step of further forming the non-magnetic body 1 on the conductor 2 Having the non-magnetic body 1 on the surface of the body 3 or 4,
A coil component having the conductor 2 in the non-magnetic body 1 is obtained.

As another method, the step of forming the same conductor support 3 as described above and the step of forming the conductor support 4 are performed.
The step of forming the non-magnetic body 1 on the inner surface of the conductor support 3 or the surface of the conductor support 4, the step of forming the conductor 2 similar to the above on the non-magnetic body 1, and further non-magnetic on the conductor 2. From the step of forming the body 1 and the step of fitting the conductor support 3 and the conductor support 4 in the same manner, the non-magnetic body 1 is provided on the surface of the conductor support 3 to 4, and the non-magnetic body 1 is provided in the non-magnetic body 1. This is a method of obtaining a coil component having the conductor 2 similar to the above. In this case, there are two conductor supports 3 and 4 around the non-magnetic body 1.

Further, in order to obtain the coil component having the structure as shown in FIG. 1, the end face layers 9 and 10 are formed on the upper and lower end faces of the conductor supports 3 and 4, and the extraction electrodes 5 and 6 and the end face electrodes are formed. Obtained by forming 7,8. However, although these are not necessarily formed, the strength or surface property of the coil component can be improved by forming the end surface layers 9 and 10, and the surface mountable component can be formed by forming the end surface electrodes 7 and 8.

As described above, the conductor support 3 or 4
Although there is a difference in the presence or absence of the formation of the end face layers 9 and 10, basically, as described above, the diameter of each turn portion in the non-magnetic body 1 gradually changes from one end to the other end, and at least each turn portion is formed. Conductors 2 located in different planes
Is formed. That is, since the conductor 2 is formed in the non-magnetic body 1 having an inclined or stepwise thickness, the coil component can be obtained with excellent productivity.

Next, a more detailed method of manufacturing the coil component of the present invention will be described with reference to the drawings.

2A to 2D are sectional views showing a method of manufacturing the coil component of the present invention in the order of steps. First, as shown in FIG. 2, a three-dimensional spiral-shaped staircase portion is formed on the inner surface of the hollow conductor support 3 having the conical or pyramidal hollow portion 11, and a plurality of turns are formed in this staircase portion. Forming a conductor support 3 having a flat surface such that the diameter of each turn portion gradually changes from one end to the other end and at least each turn portion can form the conductor 2 so as to be located in a different plane. .

Even if the shape of the inner surface is a simple conical surface or a pyramidal surface, as described above, the conductor 2 is made up of a plurality of turns, and the diameter of each turn portion gradually changes from one end to the other, and at least each The conductor 2 may be formed on this inner surface so that the turn portions are located in different planes. On the other hand, in the case of a step-like surface instead of a simple inclined surface, for example, when the conductor 2 is formed at the corner of the step-like surface, it is composed of a plurality of turns as a whole, and the diameter of each turn part is from one end to another. It is necessary to form the conductor 2 so that the conductors 2 are gradually different from one end to another and at least each turn portion is located in a different plane.

As a method of forming the hollow-body-shaped conductor support 3 having the inner surface of the above-mentioned shape, for example, a slurry-like insulator is poured onto a support having a convex portion capable of engaging with the inner surface and dried. After that, by separating from this support, a specific hollow portion 11 can be formed in the insulator. As another method, similarly to the above, a slurry-like insulator is poured on a flat support to form a smooth sheet-like insulator, and then a shape for forming the predetermined hollow portion 11 is formed. Hollow part 1 specific to the insulator with the mold that it has
1 is a method of forming 1. Further, the hollow conductor-shaped conductor support 3 having the specific hollow portion 11 can be similarly formed by a generally known powder molding method. By either method, as shown in FIG. 2, the hollow conductor-shaped conductor support 3 having the above-described specific inner surface can be formed. Moreover, as described above, the inner surface may be an inclined surface or a stepped surface.

Next, as shown in FIG. 3, a specific hollow portion 11 is formed.
The non-magnetic body 1 is formed on the inner surface of the hollow portion 11 of the conductor support 3 having the spiral step shape. Further, as shown in FIG. 4, the conductor 2 is formed on the non-magnetic body 1. This conductor 2
Is composed of a plurality of turns, and the diameter of each turn portion gradually changes from one end to the other end, and at least each turn portion is located in a different plane. As mentioned above, as mentioned above, there is a shape in which the central portion of the mosquito coil incense-shaped conductor 2 is pulled down into a trumpet shape or a shape in which concentric ones are connected. Next, as shown in FIG. 5, the nonmagnetic body 1 is formed so as to cover the conductor 2. In the above process, the conductor 2 is located in the non-magnetic body 1, and the conductor 2 has the diameter of each turn portion gradually changed from one end to the other end.
At least each turn portion is composed of a plurality of turns located in different planes.

As shown in FIG. 6, the conductor support 3 on which the conductor 2 is formed has an end face on which a lead-out electrode 6 that can be joined to the conductor end of the conductor 2 on the side of the smaller conductor diameter is formed on the bottom surface of the conductor support 3. The layers 10 are joined.

Next, as shown in FIG. 7, the conductor support 4 is formed by filling the hollow portion 11 formed by the conductor support 3 and the end face layer 10 with an insulator.

As shown in FIG. 8, as in the case where the end face layer 10 is formed, the conductor end portion on the side of the larger conductor diameter of the conductor 2 is formed on the opposite surface of the bottom surface of the conductor support 3 on which the extraction electrode 6 is formed. The end face layer 9 on which the joinable extraction electrode 5 is formed in advance is joined to the end faces of the conductor supports 3 and 4.

Further, as shown in FIG. 9, end face electrodes 7 and 8 are formed on the two surfaces of the chip-shaped component. By firing the obtained laminate, a coil component can be obtained. However, the firing may be performed without forming the end face electrodes 7 and 8. In other words, this is a method in which the end surface electrodes 7 and 8 are not formed and the end surface electrodes 7 and 8 are formed after baking. Explaining one example of the forming method in this case, a conductor layer is formed in the same shape as the end face electrode shown in FIG. 9 and is fired once. Thereafter, using this conductor layer as an electrode, nickel plating and solder or tin plating are performed. Finally, the end face electrodes 7 and 8 have a three-layer structure of an underlying conductor layer formed by firing and nickel and solder or tin formed by electroplating.

The conductor supports 3 and 4 or the end face layers 9 and 10 described above are formed by a generally known green sheet forming method,
It can be formed by a printing method, a dipping method, a powder molding method, a spin coating method, or the like. A printing method is generally used for the conductor 2 or the extraction electrodes 5 and 6, but a pattern formation using a laser, a method of transferring a conductor previously formed in a predetermined shape with a mold, a dropping method, a potting method, or a spraying method. But it's okay.

The coil component obtained by the manufacturing method of the present invention is a coil component having excellent heat resistance, and thus can be easily modularized. For example, a predetermined wiring layer is formed on a ceramic substrate such as an alumina substrate or a ferrite substrate, and wiring of the substrate and the end surface electrodes 7 and 8 of the coil component are simultaneously connected, so that they can be integrated or assembled. In this case, it is possible to open a window at a predetermined position on the substrate and connect the end face electrodes 7 and 8 on the side surfaces of the coil component to the wiring on the ceramic substrate, so that a thin module can be obtained. In this case, an ordinary thick film forming process using a generally known ceramic substrate can be applied. The end face electrodes 7 and 8 of the coil component are not based on the premise of soldering, and may be fired to be electrically connected.

The two terminals of the conductor 2 forming the above coil are in a state of being formed on the end face of the chip component and electrically connected to the end face electrodes 7 and 8. That is, the uppermost and lowermost parts of the conductor 2 have the extraction electrodes 5 and 6 for electrically connecting to the end face electrodes 7 and 8 and are connected to the end face electrodes 7 and 8.

The paste for forming each of the above layers is as follows:
Solvents such as butyl carbitol, terpineol, and alcohol, binders such as ethyl cellulose, polyvinyl butyral, polyvinyl alcohol, polyethylene oxide, and ethylene-vinyl acetate; and sintering aids such as various oxides and glasses. In addition, a plasticizer or a dispersant such as butylbenzyl phthalate, dibutyl phthalate, and glycerin may be added.
Each layer is formed using a kneaded material obtained by mixing these. A coil component is obtained by firing a laminate of these in a predetermined structure as described above. When producing a green sheet, various solvents having excellent evaporating properties, for example, butyl acetate, methyl ethyl ketone, toluene, alcohol, and the like are desirable in place of the above-mentioned solvents.

The firing temperature range is about 800 ° C. to 13
It is in the range of 00 ° C. In particular, it depends on the conductor material. For example, when silver is used as the conductor material, it is necessary to be around 900 ° C., and at 950 ° C. for an alloy of silver and palladium, and nickel or palladium is used as the conductor material for firing at a higher temperature. .

Next, a more specific embodiment of the present invention will be described. (Example 1) 8 g of butyral resin and 4 g of butylbenzyl phthalate were added to 100 g of composite type glass powder obtained by mixing alumina powder and crystallized glass powder.
g, methyl ethyl ketone 24 g and butyl acetate 2
4 g were mixed and kneaded using a pot mill to prepare an insulator slurry.

100 g of the above composite type glass powder
On the other hand, 2 g of ethyl cellulose and 20 g of α-terpineol were mixed and kneaded with a three-roll to prepare a non-magnetic paste.

An insulator green sheet having a thickness of 0.2 mm was prepared by using an insulator slurry and drying it with a coater.
The green sheet was formed on a PET film.

Three green sheets of this insulator were stacked and laminated. A hot press was used for laminating the insulating green sheets, the platen temperature of the hot press was set to 100 ° C., and the pressure was 500 kg / cm ² . The inner surface of the hollow conductor support 3 as shown in FIG. 2 is composed of a plurality of turns, and the diameter of each turn portion gradually changes from one end to the other end, and at least each turn portion is located in a different plane. A die having a shape for forming a predetermined inner surface capable of forming the conductor 2 is used to form a predetermined inner surface on the laminated insulator green sheet using a puncher, and a conical shape is formed. A hollow-body-shaped conductor support 3 having the hollow portion 11 in the center was formed.

Next, a non-magnetic material paste is used on the inner surface of the conductor support 3 to form the non-magnetic material 1 as shown in FIG. 3 by using a printing machine, and similarly, as shown in FIG. 2. The non-magnetic body 1 was formed, and the non-magnetic body 1 and the conductor 2 were formed on the conductor support 3 as shown in FIG. A commercially available silver paste is used to form the conductor 2, and the diameter of each turn portion is gradually changed from one end to the other end on the inner surface of the conductor support 3 and at least each turn portion is placed on a different plane. The conductor 2 was formed so as to be positioned. Further, the printing method was performed in the same manner as in generally known through-hole printing, by suctioning from the surface opposite to the printed surface of the conductor support 3 so that the silver paste or the non-magnetic paste was left on the inner stepped surface.

Next, as shown in FIG. 6, the lead electrode 6 is formed on the previously prepared insulator green sheet (thickness: 0.2 mm) by using the same silver paste and printing machine as described above, and the end face layer 1 is formed.
0 was produced. Further, the end face layer 10 and the conductor support 3 having the conductor 2 formed thereon were bonded together.

Further, as shown in FIG. 7, the above-mentioned insulator slurry was poured into the inner surface of the conductor support 3, that is, the hollow portion 11 to make it substantially flat. That is, the conductor support 4 was formed by this filling.

Next, as shown in FIG. 8, the lead electrode 5 is formed on the previously prepared insulator green sheet (thickness: 0.2 mm) using the same silver paste and printing machine as described above, and the end face layer 9 is formed.
Was produced. Further, the end face layer 9 and the conductor supports 3 and 4 on which the non-magnetic body 1, the conductor 2 and the like are formed were bonded together.

Further, end face electrodes 7 and 8 as shown in FIG.
Was formed using a commercially available silver paste and was fired under the condition of holding at 900 ° C. for 2 hours.

No defects such as peeling, cracking or warpage were found in the coil component of the present invention obtained by the above method.
When various electric characteristics were measured using an impedance analyzer or the like, it was found that the coil component had excellent characteristics.

As described above, with the coil component of the present invention, a coil component having excellent electrical characteristics can be obtained with a smaller number of layers than the conventional laminated coil component.

(Example 2) Using the same insulator slurry as in Example 1, the inner surface of the hollow conductor support 3 was made up of a plurality of turns, and the diameter of each turn portion gradually changed from one end to the other. Insulation having a thickness of 0.6 mm after drying using a coater on a sheet-shaped polyimide having a shape for forming a predetermined inner surface capable of forming the conductor 2 in which at least the respective turn portions are located in different planes A green sheet was prepared and a conductor support 3 was formed.

Next, as in Example 1, the nonmagnetic material 1 and the conductor 2 were formed on the inner surface of the conductor support 3. Furthermore, Example 1
The end face layers 9 and 10, the conductor support 4, the extraction electrodes 5 and 6, and the end face electrodes 7 and 8 are formed in the same manner as in, and the temperature is set to 900 ° C.
Firing for 2 hours.

No defects such as peeling, cracking and warping were found in the coil component of the present invention obtained by the above method.
When various electric characteristics were measured using an impedance analyzer or the like, it was found that the coil component had excellent characteristics.

As described above, according to the coil component of the present invention, a coil component having excellent electrical characteristics can be obtained with a smaller number of layers than a conventional laminated coil component. Furthermore, this method was more advantageous in terms of man-hours than the method shown in Example 1 because the conductor support 3 was formed in one step.

Example 3 The hollow conductor support 3 produced in Example 2 was fired under the conditions of holding it at 850 ° C. for 10 minutes.

Next, the non-magnetic material 1, the conductor 2, and the conductor support 4 were formed on the inner surface of the conductor support 3 by using the fired conductor support 3 in the same manner as in Example 1. Further, the end face layers 9 and 10, the extraction electrodes 5 and 6 and the end face electrodes 7 and 8 were formed by the same method as in Example 1 and fired at 900 ° C. for 2 hours.

No defects such as peeling, cracking and warping were found in the coil component of the present invention obtained by the above method.
When various electric characteristics were measured using an impedance analyzer or the like, it was found that the coil component had excellent characteristics.

[0062]

As is apparent from the above description, the coil component of the present invention is excellent in productivity because it does not have a laminated structure, and can be formed in a non-magnetic material on a conical or pyramidal inclined surface or a stepped surface. Since the conductor is located, the height can be kept low, and the stray capacitance between the turn parts of the conductor is hardly generated, and the electrical characteristics can be made excellent, thus increasing the industrial value. It is a thing.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a coil component of the present invention.

FIG. 2 is a schematic cross-sectional view showing a method for manufacturing a coil component of the present invention.

FIG. 3 is a schematic cross-sectional view showing a method for manufacturing a coil component according to the present invention.

FIG. 4 is a schematic cross-sectional view showing a method for manufacturing a coil component according to the present invention.

FIG. 5 is a schematic sectional view showing a method for manufacturing a coil component of the present invention.

FIG. 6 is a schematic cross-sectional view showing a method for manufacturing a coil component of the present invention.

FIG. 7 is a schematic cross-sectional view showing a method for manufacturing a coil component according to the present invention.

FIG. 8 is a schematic sectional view showing a method for manufacturing a coil component of the present invention.

FIG. 9 is a schematic cross-sectional view illustrating a method for manufacturing a coil component according to the present invention.

FIG. 10 is a schematic perspective view showing a conventional coil component.

FIG. 11 is an exploded perspective view of the same.

[Explanation of symbols]

 1 Non-Magnetic Material 2 Conductor 3,4 Conductor Support 5,6 Extraction Electrode 7,8 End Face Electrode 9,10 End Face Layer 11 Hollow Part

Claims (3)

[Claims] 1. A flat surface having a non-magnetic material on the surface of a conductor support, further comprising a plurality of turns in the non-magnetic material, wherein the diameter of each turn portion gradually changes from one end to the other and at least each turn portion is different. A coil component having a conductor located therein. 2. One or both of the step of forming a hollow conductor support having a conical or pyramidal hollow portion provided in the center and the step of forming a conical or pyramidal conductor support. And the step of forming a non-magnetic material on the inner surface of a hollow conductor support or on the surface of a conical or pyramidal conductor support, and each turn part consisting of multiple turns on the non-magnetic material. Of a coil component having a step of forming a conductor such that the diameter of the conductor gradually changes from one end to the other and at least each turn portion being located in a different plane, and a step of further forming a nonmagnetic material on the conductor Method. 3. A step of forming a hollow conductor support having a conical or pyramidal hollow portion provided in the center, a step of forming a conical or pyramidal conductor support, and a hollow body-shaped conductor support. The step of forming a non-magnetic material on the inner surface of the conductor support or on the surface of a cone-shaped or pyramidal-shaped conductor support, and the diameter of each turn part consisting of multiple turns on the non-magnetic material gradually increases from one end to the other. A step of forming a conductor so that at least each turn portion is different and located in a different plane, a step of further forming a non-magnetic material on the conductor, and a hollow body having a conical or pyramidal hollow portion provided in the center A method for manufacturing a coil component, comprising the step of fitting a circular conductor support and a conical or pyramidal conductor support.