JPH11243006A - Magnetic ceramic compound and inductor component using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic ceramic compound which can be sintered at a low temperature, can suppress migration of an internal conductor in an inductor component obtained by using the compound, and inhibit degradation of insulation and larger current resistance. SOLUTION: A magnetic ceramic compound contains 10-99.5 wt.% ferrite and 90-0.5 wt.% silicate glass which does not contain boron and has a softening point of 800 deg.C or less. Preferably, the composition of the silicate glass is 1-15 mol.% Ma2 O (Ma is at least one of elements selected from Li, Na, K, Rb, and Cs), 20-70 mol.% MeO (Me is at least one of elements selected from Be, Ba, Sr, Ca, and Mg), 5-60 mol.% SiO2 , and 0.5-70 mol.% Bi2 O3 .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a magnetic ceramic composition and an inductor component using the same.

[0002]

2. Description of the Related Art A magnetic ceramic composition generally contains ferrite as a main component. For example, JP
JP-A-110708 describes a magnetic porcelain composition containing ferrite and borosilicate glass.
This publication also discloses an inductor component such as a chip inductor and an LC composite component using such a magnetic ceramic composition as a magnetic material. Such an inductor component constitutes a laminated component having a built-in internal conductor.

According to the above publication, when a magnetic porcelain composition containing ferrite and borosilicate glass is used,
It is said that a ferrite sintered body and a chip inductor having high mechanical strength, a low sintering temperature, and good high-frequency characteristics can be obtained. Also, when obtaining an LC composite part, in co-firing with a dielectric material,
It is said that no warpage or peeling occurs.

Japanese Patent Application Laid-Open No. 2-288307 discloses a magnetic material for laminated inductors containing ferrite and borosilicate glass. And 100
It is stated that a magnetic material having a low dielectric constant suitable for use in a high frequency band of MHz or higher can be obtained.

[0005]

However, when a magnetic ceramic composition containing the above-described ferrite and borosilicate glass is used, moisture resistance, acid resistance and alkali resistance may be deteriorated depending on the composition ratio. .

One of the main reasons for this is that glass B
₂ O ₃ is included. In particular, this deterioration is remarkable in a low SiO ₂ region. The decrease in reliability due to the inclusion of B ₂ O _{3 in} glass is caused by a voltage applied portion between inductor elements of a multilayer inductor array component, a capacitor portion of a multilayer LC composite component, and an inductor portion and an external electrode portion. Electrodes may cause migration, leading to fatal defects in inductor components such as a decrease in insulation resistance and an increase in DC resistance.

Accordingly, an object of the present invention is to provide a magnetic ceramic composition and an inductor component using the same, which can solve the above-mentioned problems.

[0008]

In order to achieve the above-mentioned object, the magnetic porcelain composition of the present invention has a ferrite content of 10 to 10.
99.5 wt%, containing no boron and having a softening point of 800
It contains 90 to 0.5 wt% of a silicate glass having a temperature of not more than 0C.

The composition of the silicate glass is Ma
₂ O (where Ma is Li, Na, K, Rb and Cs
At least one selected from the group consisting of MeO (where Me is Be, Ba, Sr, C
at least one selected from the group consisting of a and Mg) is 20 to 70 mol%, SiO ₂ is 5 to 60 mol%, Bi ₂ O
₃ is 0.5 to 70 mol%.

[0010] The silicate glass contains 50 mol% or less of TiO ₂ and 50 mol% or less of CuO as subcomponents.

The silicate glass has at least one selected from the group consisting of Al ₂ O ₃ and ZrO ₂ as an auxiliary component.
Contains up to 10 mol% seed.

Further, the silicate glass contains at least one selected from ZnO, Co ₃ O ₄ and NiO as an auxiliary component in an amount of 5 mol% or less.

The silicate glass contains at least one rare earth oxide as an auxiliary component in an amount of 5 mol% or less.

The ferrite may be Ni-based ferrite, Ni-Zn-based ferrite, or Ni-Cu-Zn.
This is one type selected from the group consisting of ferrites.

Further, an inductor component of the present invention uses the above-mentioned magnetic ceramic composition as a magnetic material.

Further, the inductor component is a laminated component having a built-in internal conductor.

The inductor component referred to in the present invention includes a composite component including an inductor and other functional components such as a capacitor and a resistor, such as an LC composite component, an LR composite component, and an LCR composite component.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION As described above, the magnetic porcelain composition of the present invention contains 10 to 99.5% by weight of ferrite.
It contains 90 to 0.5% by weight of silicate glass containing no boron and having a softening point of 800 ° C. or less. As described above, by containing a glass having a softening point of 800 ° C. or less, liquid phase sintering is induced, and a dense ceramic can be obtained at a low temperature. In addition, a material having excellent high-frequency characteristics can be obtained by adding glass.

Further, by containing a silicate glass containing no boron, the glass can be easily crystallized and the chemical resistance of the glass can be increased. It is possible to prevent migration at a portion and improve the reliability of the inductor component. In addition, crystallization of glass suppresses migration during firing, so that insulation resistance is high,
An inductor component having a low DC resistance can be obtained.

The content of the silicate glass is 90 to
It is selected to be 0.5 wt%. This is 0.5w
If the content is less than t%, the content is too small and the effect of lowering the firing temperature cannot be obtained, and if it exceeds 90 wt%, the strength of the sintered body becomes insufficient, and cracks, cracks, and layer peeling occur. is there.

As described above, the composition of the silicate glass is Ma ₂ O (where Ma is Li, Na,
1 to 15 mol% of MeO (where Me is B), at least one selected from the group consisting of K, Rb and Cs
e, Ba, Sr, at least one selected whether the group consisting of Ca and Mg) is 20 to 70 mol%, SiO ₂ is 5
Preferably, 60 mol% and Bi ₂ O ₃ are 0.5 to 70 mol%.

In sintering ferrite, which is the main component, the silicate glass is added to the main component in a predetermined ratio in advance, mixed, formed into a molded body, and then fired. In this case, each of the above-described components of the silicate glass may be added individually to the main component, or each component may be preliminarily compounded and then heat-treated to be melted and vitrified. May be added after pulverization.

In this embodiment, the respective components of the silicate glass are limited to the above preferable composition ranges for the following reasons.

Ma ₂ O (Ma is Li, Na, K, Rb
And at least one selected from the group consisting of Cs and Cs)
Has the function of lowering the glass viscosity. Ma ₂ O is 1
If it is less than 10 mol%, the glass viscosity becomes too high.
Low-temperature sintering at a temperature of 00 ° C. or less becomes difficult. On the other hand, 15 mol%
When it exceeds, the moisture resistance decreases.

MeO (Me is Be, Ba, Sr, Ca
And at least one selected from the group consisting of Mg)
It works to increase chemical durability. When the MeO content is less than 20 mol%, the chemical durability is reduced and the
It becomes difficult to sinter at a low temperature of not more than ℃. On the other hand, when MeO exceeds 70 mol%, the vitrification temperature is increased and
The following low-temperature sintering becomes difficult.

If the content of SiO ₂ exceeds 70 mol%, the vitrification temperature becomes too high, and the glass does not vitrify at 1500 ° C. or less. On the other hand, if the content of SiO ₂ is less than 5 mol%, the variation in shrinkage of the sintered body becomes large, and it is not practical.

Bi ₂ O ₃ has the function of accelerating the reaction between the magnetic substance and the glass and reducing the viscosity of the glass. Bi ₂ O ₃
If it is less than 0.5 mol%, sintering at a low temperature of 1000 ° C. or less will be difficult, and if it exceeds 70 mol%, it will react with the internal electrode, and the moisture resistance will be significantly reduced.

As described above, the glass contains, as sub-components, TiO ₂ at 50 mol% or less and CuO at 50 mol% or less, and at least one of Al ₂ O ₃ and ZrO ₂ at 10 mol% or less. One containing at least one of ZnO, Co ₃ O ₄ and NiO at 5 mol% or less, one containing at least one rare earth oxide at 5 mol% or less,
Alternatively, a combination of these is preferred.

Here, TiO ₂ works to enhance chemical durability. However, if TiO ₂ exceeds 50 mol%, the melting temperature of the glass is increased, and sintering at 1000 ° C. or less becomes difficult. CuO promotes the reactivity between the magnetic substance and the glass, and further acts as a crystallizing material for the glass. However, if CuO exceeds 50 mol%, it reacts with the internal electrode layer, and the moisture resistance is significantly reduced.

Al ₂ O ₃ and ZrO ₂ serve to enhance the chemical durability of the glass and the body of the inductor component.
However, when Al ₂ O ₃ or ZrO ₂ exceeds 10 mol%,
The melting temperature of the glass is increased, and sintering at 1000 ° C. or less becomes difficult.

ZnO, Co ₃ O ₄ and NiO promote the reaction between the magnetic material and the glass and improve the magnetic properties of the magnetic material. However, when ZnO, Co ₃ O ₄ or NiO exceeds 5 mol%, sintering at 1000 ° C. or lower becomes difficult.

The rare earth oxide has the function of promoting the reactivity between the magnetic substance and the glass. However, when the amount of the additive exceeds 5 mol%, the chemical durability deteriorates.

The ferrite as the main component includes
For example, Ni-based ferrite, Ni-Zn-based ferrite,
Ni-Cu-Zn ferrite or the like is used.

The inductor component according to the present invention is an inductor chip, a laminated inductor array, an LC composite component, or the like, wherein the magnetic material composition is used as a magnetic layer, and a desired conductor layer is provided between the surface and / or the interlayer. It is formed and manufactured. As the conductor layer, a material that can be sintered at 1000 ° C. or less, such as Ag, Ag / Pd, or Cu, can be used. As a method for forming the magnetic layer, a green sheet method, a printing method, or the like can be used.

[0035]

EXAMPLES (Example 1) First, oxides, carbonates or hydroxides of each component were mixed, melted, and quenched so that silicate glass having the composition shown in Table 1 was obtained. The obtained silicate glass was dry-pulverized in a polypot using alumina balls as a boulder. Of the glasses in Table 1, FG1
FG6 is a boron-free silicate glass within the scope of the present invention, and FG7 is a borosilicate glass outside the scope of the present invention.

[0036]

[Table 1]

On the other hand, to obtain ferrite, 48.5 mol% of Fe ₂ O ₃ , 21.5 mol% of NiO and 1
0.0 mol% and 20.0 mol% of ZnO were blended.

Next, a silicate glass having a ratio shown in Table 2 was added to the ferrite component, mixed, and further a binder, a plasticizer and a solvent were added and kneaded to obtain a slurry. Then, using this slurry, a green sheet having a thickness of 100 μm was produced by a doctor blade method.

[0039]

[Table 2]

Next, as shown in FIG. 1, on the green sheet 1, internal conductors 2, 3, 4 and 5 to be an inductor array pattern were formed by printing using an Ag paste. Next, the green sheet 1 on which the internal conductors 2 to 5 were formed and the green sheet 1 on which the internal conductor was not printed were laminated and crimped as shown in FIG. afterwards,
The obtained laminate was fired in air at 930 ° C. for 2 hours.

Then, as shown in FIG. 2, an Ag paste is applied on each of the outer surfaces of the obtained sintered body 6 from which the internal conductors 2 to 5 (see FIG. 1) are drawn out. It was applied and baked at 800 ° C. for 30 minutes in the atmosphere to form outer conductors 7, 8, 9, 10, 11, 12, 13, and 14, respectively. Each of the outer conductors 7 to 14 constitutes an external terminal electrode, and is electrically connected to the corresponding inner conductor 2 to 5.

With respect to each sample of the multilayer inductor array 15 as an inductor component having a multilayer structure containing the internal conductors 2 to 5 obtained as described above, the sinterability,
A salt water boiling test, a moisture resistance load test, and a high temperature load test were performed. Table 2 shows the results. In Table 2, those marked with * are out of the scope of the present invention.
Others are within the scope of the present invention.

Here, the sinterability was determined by boiling a sample in pure water for 1 hour, and sintering a sample having a weight change before and after boiling within 0.1% as good (〇) and exceeding 0.1%. Was determined as poor sintering (x).

In the salt water boiling test, 100 samples were boiled for 1 hour in a 1N aqueous solution of NaCl, and the DC resistance was poor (external conductors 7 and 8, external conductors 9 and 10, external conductors 11 and 12, or external conductors). The rate of change in resistance between 13 and 14 before and after boiling is ± 20% or more, or insulation resistance is poor (between the outer conductors 7 and 8 and the outer conductors 9 and 10 after boiling, or the outer conductors 11 and 12). The number of failures in which the insulation resistance between the wire and the external conductors 13 and 14 was 1 × 10 ⁷ Ω or less was determined.

The humidity resistance load test was performed on 100 samples under the conditions of 45 ° C. and 95% relative humidity, between the external conductors 7 and 8 and the external conductors 9 and 10, and between the external conductors 11 and 12. DC resistance failure after continuously applying a DC voltage of 50 V between the external conductors 13 and 14 for 1000 hours (external conductors 7 and 8, external conductors 9 and 10, external conductors 11 and 12, or external conductors 13 and 14). Between the external conductors 7 and 8 and the external conductors 9 and 10 or between the external conductors 11 and 12 and the external conductor 13 Between 14 and 14) (the insulation resistance after voltage application was 1 × 10 ⁷ Ω or less).

The high-temperature load test was performed on 100 samples at 125 ° C. between the outer conductors 7 and 8 and the outer conductors 9 and 10, and between the outer conductors 11 and 12 and the outer conductors 13 and 14. DC resistance failure after continuously applying a DC voltage of 50 V for 1000 hours (external conductors 7 and 8, external conductors 9 and 10, external conductors 11 and 12,
Alternatively, the rate of change in resistance between the outer conductors 13 and 14 before and after voltage application is ± 20% or more), or poor insulation resistance (between the outer conductors 7 and 8 and the outer conductors 9 and 10 or the outer conductor 11 Insulation resistance after application of a voltage between the external conductors 13 and 14 and the external conductors 13 and 14 is 1 × 10 ⁷ Ω or less)
The number of defects in which occurred was determined.

As is clear from Table 2, the silicate glass of the present invention containing 10 to 99.5% by weight of ferrite and 90 to 0.1% of silicate glass containing no boron and having a softening point of 800 ° C. or less and a specific composition. Samples Nos. 2 to 15 containing 5 wt% are excellent in sinterability and also excellent in chemical resistance (result of boiling water test) and weather resistance (result of moisture resistance load test, result of high temperature load test). ing.

Sample Nos. 2 to 14 are examples in which the more preferred silicate glass composition described in claim 2 is used. Sample Nos. 8 to 15 are examples in which specific amounts of TiO ₂ and CuO are contained as subcomponents of the silicate glass described in claim 3. Sample Nos. 2, 9 to 15 correspond to claim 4
The specific amount of Al ₂ as a subcomponent of the silicate glass shown in
This is an example where O ₃ and / or ZrO ₂ is included. Sample No. 9 is an example in which a specific amount of ZnO, Co ₃ O ₄ , or NiO is contained as a sub-component of the silicate glass described in claim 5. Sample No. 2 is an example in which a specified amount of Nd ₂ O ₃ as a rare earth oxide is contained as a subcomponent of the silicate glass described in claim 6.

On the other hand, B ₂ O ₃
When the glass containing is added, as shown in Sample Nos. 16 to 18, the chemical resistance and the weather resistance are poor, and a DC resistance defect and an insulation resistance defect occur.

When the glass content is less than 0.5 wt%, as shown in Sample Nos. 19 and 21, the sinterability is poor, the chemical resistance and weather resistance are low, and the DC resistance is poor.
Insulation resistance failure occurs. On the other hand, the glass content is 90 w
When the content exceeds t%, as shown in Sample Nos. 20 and 22, there is no abnormality in sinterability, chemical resistance, and weather resistance, but the composition approaches the glass alone and ferrite as an aggregate decreases,
The strength of the sintered body is insufficient, and cracks, cracks, and peeling of the layer are apt to occur.

As described above, low-temperature sintering becomes possible by adding glass to ferrite. However, the glass containing B ₂ O ₃ has low chemical resistance and weather resistance, and deteriorates the reliability of parts. On the other hand, by using a specific amount of silicate glass excluding B ₂ O ₃ , chemical resistance and weather resistance are excellent, and the reliability of the laminated inductor array can be improved. .

Example 2 First, in order to obtain ferrite, 65.5 mol% of Fe ₂ O ₃ and 34.5 mol% of NiO were blended. Next, the glass types FG1 to FG7 used in Example 1 were added to the ferrite component at a ratio shown in Table 3 and mixed. Then, in the same manner as in Example 1, the thickness 1
A 00 μm green sheet was produced.

[0053]

[Table 3]

Next, as shown in FIG. 3, the inner conductors 22, 23, 24 and 25 serving as inductors and the inner conductors 26, 27 and 28 serving as capacitors are printed on the green sheet 21 by using an Ag paste. Formed.
Also, via holes 29, 30, 31, 32, 33, 34, 35 and 36 are provided on the green sheet 21 with a puncher.
Holes were made and Ag paste was filled. Next, the green sheet 21 having the internal conductors 22 to 28 and the via holes 29 to 36 formed thereon and the green sheet 21 having no internal conductor and the via hole formed thereon were laminated and crimped as shown in FIG. After that, the obtained laminate is put in the atmosphere 93
It was baked at 0 ° C. for 2 hours.

Next, as shown in FIG. 4, an Ag paste was applied to the outer surface of the obtained sintered body 38 and the respective parts from which the inner conductors were drawn out, and an Ag paste was applied thereto.
It baked at 0 degreeC for 30 minutes, and formed the external conductors 39, 40, 41, and 42, respectively.

As shown in FIG. 5, for each sample of the laminated LC composite component 37 as an inductor component, the sintering property, the salt water boiling test, A moisture resistance load test and a high temperature load test were performed. Table 3 shows the results. In Table 3, those marked with * are out of the scope of the present invention.
Others are within the scope of the present invention.

Here, regarding the sinterability, the sample was boiled in pure water for 1 hour. Poor sintering (×)
And

In the salt water boiling test, 100 samples were boiled for 1 hour in a 1N aqueous solution of NaCl, and the DC resistance was poor (the change in the resistance between the external conductors 39 and 40 before and after boiling was ± 20%). Above) or insulation resistance failure (external conductor 3
The number of defects in which insulation resistance after boiling between 9 and 40 and the external conductors 41 and 42 was 1 × 10 ⁷ Ω or less was determined.

The humidity resistance load test was performed on 100 samples under conditions of 45 ° C. and 95% relative humidity between the outer conductors 39 and 40 and the outer conductors 41 and 42.
Poor DC resistance after continuous application of 0 V DC voltage for 1000 hours (change rate of resistance between outer conductor 39 and outer conductor 40 before and after voltage application is ± 20% or more) or poor insulation resistance (outer conductor The insulation resistance after application of a voltage between 39 and 40 and the external conductors 41 and 42 is 1 × 10 ⁷ Ω.
The number of defects in which the following occurred) was obtained.

In the high-temperature load test, 100 samples were tested under the condition of 125 ° C. for the outer conductors 39 and 40.
DC resistance after continuously applying a DC voltage of 50 V between the external conductors 41 and 42 for 1000 hours (the rate of change of the resistance value between the external conductor 39 and the external conductor 40 before and after voltage application is ± 20%) Above) or the number of failures in which insulation resistance failure (the insulation resistance value between the external conductors 39 and 40 and the external conductors 41 and 42 after applying a voltage was 1 × 10 ⁷ Ω or less) was determined.

As is clear from Table 3, the silicate glass of the present invention containing 10 to 99.5% by weight of ferrite and containing 90% to 0.9% of silicate glass containing boron and having a softening point of 800.degree. Sample Nos. 32-41 containing 5 wt%
Are excellent in sinterability, chemical resistance (boiled water boiling test result) and weather resistance (moisture load test result,
High temperature load test result).

On the other hand, when no glass was added, the sinterability was poor as shown in Sample No. 31. Also,
If the addition of glass containing range of B ₂ O ₃ of the present invention, as shown in sample numbers 42 to 44, chemical resistance and weather resistance is poor, the DC resistance defect or the insulation resistance failure.

From the above, it can be seen that the same effect as in the first embodiment can be obtained also in the laminated type LC composite component.

Example 3 First, in order to obtain ferrite, 48.5 mol% of Fe ₂ O ₃ , 5.0 mol% of CuO, 20.0 mol% of ZnO, and 26.5 mol% of NiO.
Was blended. Next, the glass types FG1 to FG7 used in Example 1 were added to the ferrite component at a ratio shown in Table 4 and mixed. Then, in the same manner as in Example 1, the thickness 1
A 00 μm green sheet was produced.

[0065]

[Table 4]

Next, as shown in FIG. 6, internal conductors 52 and 53 serving as inductors were formed on the green sheet 51 by printing using an Ag paste. Also, holes for via holes 54 were made in the green sheet 51 with a puncher, and Ag paste was filled. Next, the green sheet 51 having the internal conductors 52 and 53 and the via hole 54 formed thereon and the green sheet 51 having no internal conductor and the via hole formed thereon were laminated and crimped as shown in FIG. Thereafter, the obtained laminate was fired at 930 ° C. in the air for 2 hours.

Next, as shown in FIG. 7, an Ag paste was applied to each of the outer surfaces of the obtained sintered body 56 from which the internal conductor was drawn out,
It baked at 0 degreeC for 30 minutes, and formed the external conductors 57 and 58, respectively.

For each sample of the laminated inductor 55 as an inductor component thus obtained, a sintering property, a salt water boiling test, a moisture resistance load test, and a high temperature load test were performed in the same manner as in Example 1. Was. Table 4 shows the results. In Table 4, those marked with * are out of the scope of the present invention, and others are within the scope of the present invention.

Here, the sinterability was determined by boiling a sample in pure water for 1 hour, and deciding that the weight change before and after boiling was within 0.1% as good sintering (〇) and that exceeding 0.1%. Poor sintering (×)
And

In the salt water boiling test, 100 samples were boiled in a 1N NaCl aqueous solution for 1 hour, and the DC resistance was poor (the rate of change in resistance between the external conductors 57 and 58 before and after boiling was ± 20%). The number of defects in which the above described) occurred was obtained.

The humidity resistance load test was performed under the conditions of 45 ° C. and 95% relative humidity, and the resistance between the outer conductors 57 and 58 was 200 mm.
The number of failures in which DC resistance failure (a rate of change in resistance value between the outer conductor 57 and the outer conductor 58 before and after voltage application was ± 20% or more) after continuous application of a mA current for 1000 hours was determined.

In the high-temperature load test, a current of 200 mA was applied between the outer conductors 57 and 58 at 125 ° C. for 1 hour.
DC resistance failure after continuous application for 000 hours (external conductor 5
(The rate of change of the resistance value between No. 7 and the external conductor 58 before and after voltage application was ± 20% or more) was determined.

As is apparent from Table 4, the silicate glass of the present invention containing 10 to 99.5% by weight of ferrite and 90 to 0.1% of silicate glass containing no boron and having a softening point of 800 ° C. or less and a specific composition was used. Sample No. 52 to 61 containing 5 wt%
Are excellent in sinterability, chemical resistance (boiled water boiling test result) and weather resistance (moisture load test result,
High temperature load test result).

On the other hand, when no glass was added, the sinterability was poor as shown in Sample No. 51. Also,
If the addition of glass containing range of B ₂ O ₃ of the present invention, as shown in sample numbers 62 to 64, chemical resistance and weather resistance is poor, the DC resistance defect or the insulation resistance failure.

From the above, it can be seen that the same effect as in the first embodiment can be obtained also in the multilayer inductor.

In each of the above embodiments, the case where the ferrite is a Ni ferrite or a Ni—Cu—Zn ferrite having a specific composition has been described, but the present invention is not limited thereto. Ni-based ferrites other than those shown in the above examples, Ni-Cu-Zn-based ferrites,
In addition, the same effect can be obtained for Ni-Zn ferrite.

[0077]

As is apparent from the above description, the silicate glass of the present invention containing 10 to 99.5% by weight of ferrite and containing boron and having a softening point of 800 ° C. or less and a specific composition is used. According to the magnetic porcelain composition containing 90 to 0.5 wt%, migration can be suppressed from occurring in the internal conductor in the firing process. Therefore, in the obtained inductor component, insulation deterioration occurs,
Alternatively, the problem that the DC resistance becomes high can be improved. In addition, the effect of the prior art that the sintering temperature can be lowered and an inductor component having good high-frequency characteristics can be obtained can be maintained as it is.

Therefore, the inductor component of the present invention
Since the magnetic material porcelain composition having the above-described characteristics is used as a magnetic material, a material in which insulation deterioration or an increase in DC resistance is suppressed can be obtained.

Further, in the case of the inductor component of the present invention, which is a laminated component having a built-in internal conductor, migration of the internal conductor is suppressed, and therefore, an inductor component free from poor contact between the internal conductor and the external conductor is produced. can get.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of a laminated inductor array, which is a kind of inductor component of the present invention.

FIG. 2 is a perspective view of the inductor array shown in FIG.

FIG. 3 is an exploded perspective view showing an example of a laminated LC composite component, which is a kind of inductor component of the present invention.

FIG. 4 is a perspective view of the LC composite component shown in FIG.

FIG. 5 is an equivalent circuit diagram of the LC composite component shown in FIG.

FIG. 6 is an exploded perspective view showing an example of a laminated inductor which is a kind of inductor component of the present invention.

FIG. 7 is a perspective view of the inductor shown in FIG. 6;

[Explanation of symbols]

 1, 21, 51 Green sheet 2-5, 22-28, 52, 53 Inner conductor 29-36, 54 Via hole 6, 38, 56 Sintered body 7-14, 39-42, 57, 58 Outer conductor

Claims (9)

[Claims] 1. A ferrite comprising 10 to 99.5 wt%,
A magnetic porcelain composition containing 90 to 0.5% by weight of silicate glass containing no boron and having a softening point of 800C or lower. 2. The composition of the silicate glass is Ma ₂ O
(However, Ma is at least one selected from the group consisting of Li, Na, K, Rb and Cs) 1 to 15 mol%, MeO (where Me is Be, Ba, Sr, Ca
And at least one) 20 to 70 mole% selected from the group consisting of Mg, SiO ₂ 5 to 60 mol%, Bi ₂ O
The magnetic porcelain composition according to claim 1, wherein ₃ is 0.5 to 70 mol%. 3. The silicate glass comprises T as a sub-component.
_3. The magnetic porcelain composition according to claim 1, which comprises 50 mol% or less of iO2 and 50 mol% or less of CuO. 4. The silicate glass as a sub-component,
The magnetic ceramic composition according to claim 1, comprising at least 10 mol% of at least one selected from Al ₂ O ₃ and ZrO ₂ . 5. The silicate glass as a sub-component,
_3. The magnetic porcelain composition according to claim 1, comprising at least 5 mol% of at least one selected from ZnO, Co ₃ O ₄ and NiO. 6. The silicate glass as a sub-component,
3. The magnetic porcelain composition according to claim 1, comprising at least one rare earth oxide in an amount of 5 mol% or less. 7. The ferrite is a Ni-based ferrite,
The ferrite is one selected from the group consisting of a Ni-Zn ferrite and a Ni-Cu-Zn ferrite.
7. The magnetic porcelain composition according to any one of items 1 to 6. 8. An inductor component using the magnetic ceramic composition according to claim 1 as a magnetic material. 9. The inductor component according to claim 8, wherein the inductor component is a multilayer component having a built-in internal conductor.