JP2021002657A - Performance-enhanced hybrid inductor using composite material and electronic component including the same - Google Patents

Abstract

To provide a performance-enhanced hybrid inductor using a composite material designed to realize a high Q value which is an advantage of a ferrite inductor while maintaining the basic characteristics of a dielectric inductor.SOLUTION: A hybrid inductor includes a hybrid dielectric layer 120 in which a dielectric 122 and a magnetic material 124 are mixed, and an electrode pattern arranged in the hybrid dielectric layer 120. The hybrid dielectric layer 122 is a mixture obtained by adding the magnetic material 124 to the dielectric 122.SELECTED DRAWING: Figure 7

Description

The present invention relates to a technique for embodying a hybrid inductor, and more specifically to a performance-enhanced hybrid inductor using a composite material and an electronic component having the same.

Inductors (L), capacitors (C), and resistors (R) used as passive elements in electronic circuits may have their own unique functions and roles, but they may also be interconnected to perform new circuit functions. To do.

For example, a capacitor basically blocks direct current and allows an AC signal to pass through, but it also constitutes a time constant circuit, time delay circuit, RC filter, and LC filter, and the capacitor itself produces noise. It also plays a role in removing.

In the case of an inductor, it performs functions such as removing high frequency noise (Noise) and matching impedance.

Such inductors are divided into magnetic inductors using a magnetic material and dielectric inductors using a dielectric material, and are commercialized.

In the following, the conventional inductor will be described more specifically with reference to the accompanying drawings.

FIG. 1 is a schematic diagram for explaining the characteristics of a conventional inductor, and FIG. 2 is a schematic diagram showing the characteristics of a conventional dielectric inductor and a magnetic inductor.

As shown in FIGS. 1 and 2, conventional inductors are divided into high-frequency dielectric inductors using a dielectric and low-frequency ferrite inductors using a magnetic material.

A dielectric inductor has a magnetic permeability of 1, which makes it difficult to obtain a high inductance value, but has a relatively small loss, so it has the advantage of easily embodying an inductor with a high quality coefficient value at high frequencies. is there.

On the other hand, magnetic inductors have high magnetic permeability, so it is easy to realize high inductance in the same space, but because of the large loss of magnetic material, it is difficult to obtain high quality coefficient values and high frequency operation is also difficult. is there.

As described above, the dielectric inductor and the magnetic inductor have different usable frequencies and different required characteristics. Therefore, the application fields have been divided into two, and the products are also divided into two at present.

On the other hand, FIG. 3 is a drawing showing an inductor structure in which magnetic materials and dielectric materials are alternately laminated, FIG. 4 is a schematic view showing a common mode filter structure, and FIG. 5 shows a common mode filter product. It is a photograph.

As shown in FIG. 3, an inductor having a composite structure in which magnetic materials and dielectric materials are alternately laminated is shown.

4 and 5 show a common mode filter structure and a product for controlling common mode noise using an inductor having a composite structure.

Such a common mode filter removes common mode noise caused by imbalances between high speed differential signal lines. In addition, the common mode filter is an indispensable component for smoothly processing data in the high frequency band of several to several hundred GHz of mobile devices and digital devices such as smartphones.

Such a common mode filter uses a composite structure in which a magnetic material and a dielectric are laminated, but an inductor that utilizes the magnetic permeability characteristic is embodied in the magnetic material structure, and a capacitor that utilizes the dielectric constant characteristic is used. , Is embodied in a dielectric structure.

That is, although the composite structure is used, the inductor embodied here corresponds to a magnetic inductor. As described above, the prior art has embodied an inductor as a kind of material for a magnetic material or a dielectric, and only shows the inductor characteristics due to the inherent characteristics of the magnetic material or the dielectric.

As a related prior document, there is Korean Patent Publication No. 10-2014-0131418 (published on November 13, 2014), which describes a hybrid power inductor and a method for manufacturing the same.

An object of the present invention is to provide a performance-enhanced hybrid inductor using a composite material designed to realize a high Q value, which is an advantage of a ferrite inductor, while maintaining the basic characteristics of a dielectric inductor, and electronic components having the same. Is to provide.

The performance-enhanced hybrid inductor using the composite material according to the embodiment of the present invention for achieving the above object is a hybrid dielectric layer in which a dielectric and a magnetic material are mixed; and is arranged in the hybrid dielectric layer. The hybrid dielectric layer includes an electrode pattern; and is characterized in that the hybrid dielectric layer is a mixture in which a magnetic material is added to the dielectric material.

The dielectric is made of a ceramic material, and the magnetic material is made of a ferrite material.

Further, the hybrid dielectric layer is preferably a sintered body obtained by sintering a mixture in which a magnetic material is added to the dielectric material.

The hybrid dielectric layer may contain 95 to 99.999% by weight of the dielectric and 0.001 to 5% by weight of the magnetic material.

At this time, it is more preferable that the hybrid dielectric layer contains 98 to 99.99% by weight of the dielectric and 0.01 to 2% by weight of the magnetic material.

The hybrid dielectric layer is composed of a plurality of layers, and the electrode pattern includes a horizontal portion arranged on at least one surface and the other surface of the hybrid dielectric layer composed of the plurality of layers, and the plurality of layers. It may have at least one penetrating portion that penetrates the hybrid dielectric layer made of and connects the horizontal portions.

An electronic component having a performance-enhanced hybrid inductor using a composite material according to an embodiment of the present invention for achieving the above object includes an inductor; and at least one electronic element connected to the inductor; , A hybrid dielectric layer in which a dielectric and a magnetic material are mixed; and an electrode pattern arranged in the hybrid dielectric layer; the hybrid dielectric layer is a mixture in which a magnetic material is added to a dielectric material. It is characterized by being.

The performance-enhanced hybrid inductor using the composite material according to the present invention and the electronic components having the same are the optimum dielectric and magnetic material showing a high Q value, which is an advantage of the ferrite inductor, while maintaining the basic characteristics of the dielectric inductor. I came up with the composition ratio of.

As a result, the performance-enhanced hybrid inductor using the composite material according to the present invention and the electronic component having the same maintain the basic characteristics of the dielectric inductor by changing the material to the hybrid dielectric layer in which the dielectric and the magnetic material are mixed. At the same time, since it can have a high Q value, which is an advantage of the ferrite inductor, it can satisfy both high frequency and low loss characteristics suitable for 5G mobile communication.

As a result, the performance-enhanced hybrid inductor using the composite material according to the present invention and the electronic components having the same can be realized not only by the inductor alone, but also by modules and components in which a plurality of electronic elements such as inductors and capacitors are integrated. For example, it can be applied to circuit configurations such as band pass filters, resonators, power amplifiers, oscillators, etc., and can be utilized to improve the performance of the entire circuit.

The schematic diagram for demonstrating the conventional inductor characteristic. The schematic diagram which showed the characteristic of the conventional dielectric inductor and the magnetic inductor. The drawing which showed the inductor structure in which the magnetic material and the dielectric material were alternately laminated. The schematic diagram which showed the common mode filter structure. A photo showing a common mode filter product. The perspective view which showed the performance-enhanced hybrid inductor using the composite material by the Example of this invention. The schematic diagram for demonstrating the hybrid dielectric layer of FIG. Photographs showing photographs of inductors manufactured according to Examples 1 to 5 and Comparative Example 1. Photographs showing the results of electrode reaction experiments on hybrid dielectric layers manufactured according to Examples 1 to 4. The graph which showed the result of having measured the inductance value by frequency with respect to the inductor manufactured according to Example 1-5 and Comparative Example 1. The graph which showed the result of having measured the Q value by frequency for the inductor manufactured according to Example 1-5 and the comparative example 1. FIG.

The advantages and features of the present invention, and the methods for achieving them, will be clarified with reference to the examples described in detail with the accompanying drawings. However, the present invention is not limited to the examples disclosed below, and is embodied in various forms different from each other. However, the present embodiment completes the disclosure of the present invention. It is provided to fully inform a person having ordinary knowledge in the technical field to which the invention belongs the scope of the invention, and the present invention is only defined by the claims. The same reference numerals in the entire specification refer to the same components.

A performance-enhanced hybrid inductor using a composite material according to a preferred embodiment of the present invention and an electronic component having the same will be described in detail with reference to the drawings attached below.

FIG. 6 is a perspective view showing a performance-enhanced hybrid inductor using a composite material according to an embodiment of the present invention, and FIG. 7 is a schematic diagram for explaining the hybrid dielectric layer of FIG.

Referring to FIGS. 6 and 7, the performance-enhanced hybrid inductor 100 using the composite material according to the embodiment of the present invention has a high Q value, which is an advantage of the ferrite inductor, while maintaining the basic characteristics of the dielectric inductor. Designed to be feasible.

The inductor 100 used as one of the passive components for 5G mobile communication has a very important Q value, and when designing a circuit, the Q value of the inductor 100 is the largest factor that determines the Q value of the circuit. Therefore, in the present invention, the inductor 100 having a high Q value has been developed while maintaining the basic characteristics of the dielectric inductor by changing the material to the hybrid dielectric layer 120 in which the dielectric and the magnetic material are mixed.

Thereby, the performance-enhanced hybrid inductor 100 using the composite material according to the embodiment of the present invention can satisfy both the high frequency and low loss characteristics suitable for 5G mobile communication.

Therefore, the performance-enhanced hybrid inductor 100 using the composite material according to the embodiment of the present invention includes the hybrid dielectric layer 120 and the electrode pattern 140.

As the hybrid dielectric layer 120, a mixture of the dielectric 122 and the magnetic material 124 is used. Here, the hybrid dielectric layer 120 is more preferably a mixture in which the magnetic material 124 is added to the dielectric material 122.

At this time, a ceramic material is used for the dielectric 122. As an example, the dielectric 122 may be made of a ceramic material containing ZnO as a main component, and various additives (for example, oxides of Bi, Sb, Ag, Mn, Co, Zr, Cr, Al, etc.) may be used. In addition, it becomes possible to realize the required inductor characteristics and control the bondability and shrinkage rate. Thereby, the dielectric 122 can be made of the ceramic material alone, or a mixture in which various additives are further added to the ceramic material can be used.

A ferrite material is used for the magnetic material 124. As an example, as the magnetic material 124, a ferrite material containing Fe—Ni—Zn as a main component may be used, and the required inductance can be controlled by adjusting the constituent components and the content. Further, the magnetic material 124 can further add various additives (for example, oxides such as Bi, Co, Si, or Cu) to control the bondability and the shrinkage rate at the time of plasticity. As a result, the magnetic material 124 can be made of the ferrite material alone, or a mixture in which various additives are further added to the ferrite material can be used.

The hybrid dielectric layer 120 described above is more preferably a sintered body obtained by sintering a mixture in which the magnetic material 124 is added to the dielectric material 122.

Such a hybrid dielectric layer 120 preferably contains 95 to 99.999% by weight of the dielectric 122 and 0.001 to 5% by weight of the magnetic material 124, and more preferably 98 of the dielectric 122. ~ 99.99% by weight and 0.01-2% by weight of the magnetic material 124 can be presented.

When the magnetic material 124 is added in a small amount in an amount of less than 0.001% by weight based on the total weight of the hybrid dielectric layer 120, it exhibits low dose and high frequency characteristics similar to the dielectric inductor and may exhibit a low Q value. On the contrary, when the magnetic material 124 is added in a large amount exceeding 5% by weight of the total weight of the hybrid dielectric layer 120, it exhibits high dose and low frequency characteristics like the ferrite inductor, and the dielectric 122 is contained. There is a problem that it is not possible to demonstrate its advantages.

As described above, in the present invention, by controlling the fraction of the magnetic material 124 of the hybrid dielectric layer 120 with the optimum content ratio, the high Q value which is an advantage of the ferrite dielectric material is maintained while maintaining the characteristics of the dielectric inductor. Can be obtained.

The electrode pattern 140 is arranged in the hybrid dielectric layer 120. Such electrode patterns 140 include copper (Cu), tungsten (W), cobalt (Co), nickel (Ni), titanium (Ti), aluminum (Al), gold (Au), silver (Ag) and chromium (Ag). It can be formed of one or more materials of Cr), but is not limited to this, and any metallic substance having conductivity can be used without limitation.

Here, the hybrid dielectric layer 120 may be composed of a plurality of layers. In this case, the electrode pattern 140 may have a horizontal portion 142 and a penetrating portion 144. The horizontal portion 142 of the electrode pattern 140 is arranged on at least one of one surface and the other surface of the hybrid dielectric layer 120 composed of a plurality of layers. At least one of the penetrating portions 144 of the electrode pattern 140 is arranged so as to penetrate the hybrid dielectric layer 120 composed of a plurality of layers and connect the horizontal portions 142.

On the other hand, the electronic component having the performance-enhanced hybrid inductor using the composite material according to the embodiment of the present invention includes the hybrid inductor and the electronic element.

Here, at least one electronic element is connected to the hybrid inductor.

At this time, as the hybrid inductor, substantially the same as the hybrid inductor described with reference to FIGS. 7 and 8 is used.

That is, the hybrid inductor includes a hybrid dielectric layer in which a dielectric and a magnetic material are mixed, and an electrode pattern arranged in the hybrid dielectric layer. At this time, as the hybrid dielectric layer, a mixture in which a magnetic material is added to the dielectric material is used.

As discussed so far, the performance-enhanced hybrid inductor using the composite material according to the embodiment of the present invention and the electronic component having the same have high Q, which is an advantage of the ferrite inductor while maintaining the basic characteristics of the dielectric inductor. We came up with the optimum composition ratio of dielectric and magnetic material to show the value.

As a result, the performance-enhanced hybrid inductor using the composite material and the electronic component having the same according to the embodiment of the present invention are based on the dielectric inductor by changing the material to the hybrid dielectric layer in which the dielectric and the magnetic material are mixed. Since it can have a high Q value, which is an advantage of the ferrite inductor, while maintaining the characteristics, it is possible to satisfy both the high frequency and low loss characteristics suitable for 5G mobile communication.

As a result, the performance-enhanced hybrid inductor using the composite material according to the embodiment of the present invention and the electronic component having the same can be realized not only as a single inductor but also a plurality of electronic elements such as an inductor and a capacitor are integrated. It can be applied to circuit configurations of modules and components, such as band pass filters, resonators, power amplifiers, oscillators, etc., and can be utilized to improve the performance of the entire circuit.

Examples In the following, the configuration and operation of the present invention will be described in more detail through preferred examples of the present invention. However, this is presented as a preferred example of the invention and should not be construed as limiting the invention in any way.

The contents not described here can be sufficiently inferred technically by an expert in this technical field, and therefore the description thereof will be omitted.

1. 1. Inductor Manufacturing Example 1
A hybrid inductor was manufactured using a hybrid dielectric layer composed of 99.5 wt% dielectric and 0.5 wt% ferrite.

Example 2
A hybrid inductor was manufactured using a hybrid dielectric layer composed of 99.0 wt% dielectric and 1.0 wt% ferrite.

Example 3
A hybrid inductor was manufactured using a hybrid dielectric layer composed of 98.5 wt% dielectric and 1.5 wt% ferrite.

Example 4
A hybrid inductor was manufactured using a hybrid dielectric layer composed of 98.0 wt% dielectric and 2.0 wt% ferrite.

Example 5
A hybrid inductor was manufactured using a hybrid dielectric layer composed of 97.5 wt% dielectric and 2.5 wt% ferrite.

Comparative Example 1
A dielectric inductor was manufactured using a dielectric layer composed of 100 wt% dielectric.

2. 2. Evaluation of Physical Properties FIG. 8 is a photograph showing the inductors of Examples 1 to 5 and Comparative Example 1.

As shown in FIG. 8, actual measurement photographs of inductors manufactured according to Examples 1 to 5 and Comparative Example 1 are shown.

At this time, the inductor manufactured according to Examples 1 to 5 is a hybrid dielectric layer in which the magnetic material is composed of 0.5 wt%, 1.0 wt, 1.5 wt%, 2.0 wt%, and 3.0 wt%, respectively. The inductor manufactured according to Comparative Example 1 uses a dielectric layer composed of 100 wt% of a dielectric.

On the other hand, FIG. 9 is a photograph showing the results of an electrode reaction experiment on a hybrid dielectric layer manufactured according to Examples 1 to 4.

As shown in FIG. 9, the hybrid dielectric layer manufactured according to Examples 1 to 4 has 99.5 wt% dielectric and 0.5 wt% magnetic material, 99 wt% dielectric and 1.0 wt% magnetic material, and a dielectric material. By controlling the optimum fractions composed of 98.5 wt% and 1.5 wt% of magnetic material and 98 wt% of dielectric and 2.0 wt% of magnetic material, the electrode pattern and simultaneous plasticity can be achieved without cracking. It can be confirmed that it will be done.

On the other hand, FIG. 10 is a graph showing the results of measuring the frequency-specific inductance values for the inductors manufactured according to Examples 1 to 5 and Comparative Example 1.

As shown in FIG. 10, in the case of the inductor manufactured according to Examples 1 to 4, it is confirmed that the inductance value in the frequency band of 0 to 1200 MHz is almost increased as compared with the inductor manufactured according to Comparative Example 1. be able to. However, in the case of Example 5 in which a large amount of magnetic material was added at 3 wt%, it was confirmed that the inductance value was similar to that of the inductor manufactured according to Comparative Example 1.

FIG. 11 is a graph showing the results of measuring the Q value for each frequency with respect to the inductors manufactured according to Examples 1 to 5 and Comparative Example 1.

As shown in FIG. 11, in the case of the inductor manufactured according to Examples 1 to 4, it is confirmed that the Q value in the frequency band of 0 to 1200 MHz is almost increased as compared with the inductor manufactured by Comparative Example 1. be able to. However, in the case of Example 5 in which a large amount of magnetic material was added at 3 wt%, it was confirmed that the Q value was similar to that of the inductor manufactured according to Comparative Example 1.

In particular, the maximum Q value of the inductor manufactured according to Comparative Example 1 was measured as 14, but the maximum Q value of the inductor manufactured according to Example 3 was measured as 17.2 and manufactured according to Example 3. It was confirmed that the maximum Q value of the inductor was increased by about 20%.

Although the examples of the present invention have been mainly described above, various changes and modifications can be made at the level of an engineer having ordinary knowledge in the technical field to which the present invention belongs. Such changes and modifications can be said to belong to the present invention as long as they do not deviate from the scope of the technical idea provided by the present invention. Therefore, the scope of rights of the present invention should be determined by the claims described below.

100 Hybrid Inductor 120 Hybrid Dielectric Layer 122 Dielectric
124 Magnetic material 140 Electrode pattern 142 Horizontal part of electrode pattern 144 Penetration part of electrode pattern

Claims (7)

A hybrid dielectric layer in which a dielectric and a magnetic material are mixed;
Includes an electrode pattern disposed within the hybrid dielectric layer;
The hybrid dielectric layer is a performance-enhanced hybrid inductor using a composite material, which is a mixture in which a magnetic material is added to a dielectric. The dielectric is a ceramic material.
The magnetic material is made of a ferrite material.
A performance-enhanced hybrid inductor using the composite material according to claim 1. The hybrid dielectric layer is
It is a sintered body obtained by sintering a mixture in which a magnetic material is added to the dielectric material.
A performance-enhanced hybrid inductor using the composite material according to claim 1. The hybrid dielectric layer is
It is characterized by containing 95 to 99.999% by weight of the dielectric and 0.001 to 5% by weight of the magnetic material.
A performance-enhanced hybrid inductor using the composite material according to claim 1. The hybrid dielectric layer is
It is characterized by containing 98 to 99.99% by weight of the dielectric and 0.01 to 2% by weight of the magnetic material.
A performance-enhanced hybrid inductor using the composite material according to claim 4. The hybrid dielectric layer is composed of a plurality of layers.
The electrode pattern penetrates a horizontal portion arranged on at least one of one surface and the other surface of the hybrid dielectric layer composed of the plurality of layers and the hybrid dielectric layer composed of the plurality of layers, and is said to be horizontal. It is characterized by having at least one penetrating portion connecting the portions.
A performance-enhanced hybrid inductor using the composite material according to claim 1. Hybrid inductor; and
Includes at least one electronic device coupled to the hybrid inductor;
The hybrid inductor includes a hybrid dielectric layer in which a dielectric and a magnetic material are mixed; and an electrode pattern arranged in the hybrid dielectric layer;
The hybrid dielectric layer is an electronic component having a performance-enhanced hybrid inductor using a composite material, which is a mixture in which a magnetic material is added to a dielectric.