JP2000235936A - Composite part and manufacture of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily obtain various kinds of composite parts for easily realizing various types of filters with excellent productivity and least changes. SOLUTION: A conductor 4 for a coil is provided with terminals 7 on the edge faces, and the edge face having a terminal 7 of a capacitor having terminals 7 on the adjacent edge faces is formed in parallel with the edge face having the terminal 7 of the coil, and those terminals 7 are connected with one edge face electrode. Then, the other terminal 7 of the capacitor and the other terminal 7 of the coil are connected with different edge face electrodes so that composite parts are constituted. Thus, various types of composite parts can be easily manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Composite components are widely used in various electronic devices and communication devices. In recent years, small or thin composite components have been increasingly required. Composite parts as countermeasures are also becoming increasingly important.

Conventionally, a composite component satisfying these demands is a laminated coil component obtained by alternately laminating a ferrite magnetic layer and a coil conductor layer (for example, Japanese Patent Publication No. 57-39).
No. 521) and a composite component further laminated with a multilayer ceramic capacitor (for example, JP-B-59-24534,
Japanese Patent Publication No. 62-28891).

[0004] In the case of a composite component comprising a coil and a capacitor, various composite components (for example, Japanese Patent Publication No. Sho 62-62) depend on how the coils and capacitors constituting these components are three-dimensionally arranged.
28891, JP-A-1-192107, etc.). In particular, composite components used as noise suppression components use a plurality of coils and capacitors, and are L-shaped and T-shaped.
It is common to form and use a filter of the type or π type. It is desirable to arrange such a filter easily or to ensure consistency. However, various composite parts have been proposed so far, but have a configuration specialized for any one of the filters. For example, Japanese Patent Publication No. 62-2889
No. 1 discloses a composite component limited to a T-type filter, and has a problem in reducing interference between coils and ensuring matching between a coil and a capacitor.

[0005]

As described above, a composite component composed of a plurality of coils and a capacitor has a L component.
It was common to embody what is limited to any of the type, T type or π type. There has been a problem in realizing various types of L-type, T-type or π-type films with slight changes. In addition, it was necessary to ensure sufficient matching to integrate the coil and the capacitor.

The present invention eliminates the above-mentioned drawbacks of the prior art, is excellent in productivity, and is capable of easily realizing each type of filter with little change of various types of filters as much as possible. It is an object of the present invention to provide a manufacturing method thereof.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a composite part according to the present invention has a terminal having a terminal connected to an electrode forming a coil and a capacitor on a predetermined end face, and a composite part having a predetermined stacking structure. It is a part.

According to the present invention, there is provided a composite part having excellent productivity and capable of easily producing various types of filters.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a capacitor having a terminal for a coil conductor on an opposite end face and having a terminal on an adjacent end face, and a coil having a terminal on one end and a coil on the other end face. Parallel to the end face having the terminals
It is a composite part which is connected to one end face electrode, and the other capacitor terminal and coil terminal are connected to different end face electrodes respectively.
It becomes the structure which can obtain a type filter.

According to a second aspect of the present invention, an end face having one terminal and an end face having a coil terminal of a capacitor having a coil conductor terminal on an adjacent end face and having a terminal on an opposite end face are provided. It is a composite component that is parallel and connected to one end face electrode, and the other capacitor terminal and coil terminal are connected to different end face electrodes, respectively. The structure can be obtained.

According to a third aspect of the present invention, a terminal of a coil conductor is provided on an opposite end face, and an intermediate terminal of the coil conductor is provided on a side face thereof, and a terminal is provided on the opposite end face. Connected to one terminal of the capacitor
The terminal of the other capacitor and the terminal of the coil are composite parts connected to different end face electrodes, respectively, and have a structure that allows easy production and easy acquisition of a T-type filter.

According to a fourth aspect of the present invention, a terminal for a coil conductor is provided on an opposite end face, a terminal connected to an independent electrode on each of the opposite end faces, and a terminal connected to a common electrode on the side face. The terminal connected to the common electrode of the capacitor is connected to one end face electrode, and the terminal on the opposite end face of the capacitor and the coil is connected to another end face electrode to form a composite part. The structure is such that a π-type film can be obtained easily and easily.

According to a fifth aspect of the present invention, there is provided a composite part in which the coil conductor is present on the surface of the element body made of insulating material, so that the filter can be easily produced and each type of filter can be easily obtained. Becomes

According to a sixth aspect of the present invention, the coil conductor is a composite component having a spiral shape, and has a structure that allows easy production and easy acquisition of each type of filter.

According to a seventh aspect of the present invention, there is provided a method for forming an insulator layer, a step for forming a dielectric layer, a step for forming a conductor for a coil on the surface of the insulator layer, A step of forming a capacitor electrode layer on the surface, a step of laminating a dielectric layer on which the capacitor electrode layer is formed or a dielectric layer not formed thereon to form a capacitor, and a step of forming a coil on the surface of the insulator layer. And a step of forming an end face electrode on the surface by integrating a capacitor having a conductor for use with a capacitor and forming end electrodes on the surface, and can easily form composite components to be various types of filters.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing a typical example of a composite part according to the present invention. FIG. 1 schematically shows a laminated state of a chip-shaped composite component of the present invention, and as shown in FIG. The coil section 1 is composed of an insulator layer 3 and a conductor 4, and the capacitor section 2 is composed of a dielectric layer 5 and an electrode layer 6.
Further, the conductor 4 forming the coil has two terminals 7, and similarly, the electrode layer 6 forming the capacitor also has two terminals 7. The terminal 7 is a conductor 4 or an electrode layer 6
It has excellent conductivity exposed on the surface of the coil section 1 or the capacitor section 2 electrically connected to the coil section 1 or the capacitor section 2.

As described above, in the example of FIG.
Is composed of the conductor 4 present on the surface of the insulator layer 3, but the surface other than the terminals 7 may be covered with an insulating material.

FIG. 2 is a view showing the appearance of the composite part of the present invention. As shown in FIG. 2, the composite component has a configuration having three end electrodes 8 on the surface. Further, in the example of FIG. 2, as described above, the surface other than the end surface electrodes 8 is covered with an insulating exterior material 9.

In FIG. 1, a conductor 4 forming a coil
Has a shape in which the surfaces thereof are spirally connected so as to bundle the entire insulator layer 3, and these two terminals are connected to terminals 7 which are present on opposite end surfaces. The capacitor section 2 has a configuration in which a dielectric layer 5 and an electrode layer 6 are stacked.
The electrode layers 6 are respectively connected to two terminals 7 present on adjacent end faces. Further, as shown in FIG. 2, each terminal 7 is connected to three end face electrodes 8 present on the surface of the component. One terminal 7 of the coil unit 1 and the capacitor unit 2
Are connected to the same end face electrode 8.

The example shown in FIG. 1 is an example of an L-type filter. Similarly, FIG. 3 shows an example of another L-type filter. FIG.
3 is that the terminal 7 in the facing state is the terminal 7 of the capacitor or the terminal 7 of the coil.

FIG. 4 shows an example of a T-type filter, and FIG.
Shows an example of a π-type filter. In the case of FIG. 4, not all the terminals 7 are connected to the end face electrodes 8, and there is a case where only the terminals 7 of the capacitor and the coil are connected.

In an LC composite component as a noise suppression component, one of the important electrical characteristics of a T-type or π-type filter is a cutoff frequency as a filter. This is generally defined as a frequency at which a predetermined amount of attenuation is obtained as a low-pass filter, and this frequency is substantially determined by the characteristics of the coils and capacitors constituting the filter, that is, the inductance or capacitance. As shown in FIG. 4 or 5, even in the same configuration, the capacitance is changed by partially cutting the electrode layer 6 constituting the capacitor, or the capacitance is changed by changing the thickness of the dielectric layer 5. Can be easily done. With these, filters having various cutoff frequencies can be realized. Further, as a method of changing the inductance, there are a method of changing the magnetic permeability of the insulating layer 3, a method of changing the number of turns and pitch of the conductor 4, and a method of changing the cross-sectional area of the insulating layer 3.

As described above, the insulator layer 3 may be a non-magnetic material or a magnetic material. Any non-magnetic material may be used as long as it is electrically insulating, such as an organic insulating material such as glass epoxy or polyimide, or an inorganic insulating material such as glass, glass ceramics or ceramics. .

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.

When the insulating layer 3 is made of a magnetic material, the conductor 4
Can be increased, and when a non-magnetic material is used, a large inductance cannot be obtained, but the self-resonant frequency increases. As described above, the cutoff frequency of the filter can be changed. Further, attention must be paid to the dielectric constant of the insulator layer 3, which affects the stray capacitance of the coil.

As the material of the conductor 4 or the electrode layer 6, any material may be used as long as it is an electrically good conductor, but copper, silver and a palladium alloy or silver is desirable.

The exterior material 9 only needs to be excellent in insulating properties, and in particular, can change the electrical characteristics of a coil mixed with a magnetic material having insulating properties.

The end face electrode 8 may be made of a conductive material. However, in general, it is preferable that the end face electrode 8 be composed of a plurality of layers instead of a single layer. Mounting strength or solder wettability during mounting,
It is necessary to consider solder cracks, etc. Specifically, the lowermost layer uses the same conductive material as the conductor 4 or the electrode layer 6, the intermediate layer uses nickel having resistance to solder, and the outermost layer uses Use solder or tin having good wettability to solder.

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 a metal.

Also, a predetermined wiring pattern is formed on a ceramic substrate such as alumina or ferrite, a window is provided on the ceramic substrate, a composite component is inserted, and the wiring pattern is brought into contact with the end face electrode 8 of the composite component to form a thick film forming process. It is also conceivable that a structure corresponding to this thick film forming process can be provided by increasing the heat resistance because it is electrically connected by sintering.

As described in the above example, the coil section composed of the capacitor section 2 formed by laminating the electrode layer 6 and the dielectric layer 5 and the conductor 4 positioned so as to surround the insulating layer 3 as shown in FIG. In the composite component including the part 1, by connecting the specific terminal 7 and the end face electrode 8 to form a composite component, unlike the conventional component, it is easy to produce and can be easily formed. It is possible to provide a composite component having a structure that allows the LC filter to be separately formed with a slight change. In other words, the conductor 4 exists on the surface of the insulator layer 3. In the example of FIG.
The conductor 4 is formed of a conductive material spirally existing on the surface of the insulator layer 3.

In the above-described embodiment, only the surface mounting type in which the end electrodes 8 are provided at both ends and the like has been described. However, a terminal in which a pin terminal is implanted in an insulator or a terminal instead of the end surface electrode 8 is used. A lead-type composite component in which the cap-shaped electrode having the above structure is fitted and coupled to both ends of the component can also be used.

Next, a method of manufacturing a composite part according to the present invention will be described.

The method for manufacturing a composite part according to the present invention comprises the steps of forming an insulator layer 3, forming a dielectric layer 5, and forming a coil conductor 4 on the surface of the insulator layer 3. A step of forming the coil portion 1, a step of forming a capacitor electrode layer 6 on the surface of the dielectric layer 5, a step of forming the capacitor electrode layer 6 or a non-formed dielectric layer 5. Are laminated to form the capacitor section 2, and the step of integrating the coil section 1 and the capacitor section 2 and forming the end face electrode 8 on the surface thereof. Further, as shown in FIG. 2, a step of forming the exterior material 9 may be added.

Next, a more detailed method of manufacturing a composite part according to the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view showing a laminated state of one composite part of the present invention. The manufacturing method will be further described with reference to FIG. First, as shown in FIG. 1, the insulator layer 3 and the dielectric layer 5 are formed in advance. As shown in FIG. 1, the insulator layer 3 is laminated, the conductor 4 is formed, and the coil unit 1 is manufactured. An electrode layer 6 having a predetermined pattern as shown in FIG. 1 is formed on the dielectric layer 5, and the capacitor section 2 is formed by sequentially laminating the electrode layers 6 in the lamination order as shown in FIG. The coil part 1 and the capacitor part 2 are integrated, and an end face electrode 8 as shown in FIG. 2 is formed on the side surface of the laminate.

As a more specific method for forming the conductor 4, the conductor 4 is first formed on the entire surface of a laminate obtained by laminating the insulator layers 3. Next, laser, high pressure water,
There are a method of forming a pattern in a spiral shape using a method using carbon dioxide gas or abrasive grains, and a method of forming a pattern on the conductor 4 formed on the entire surface with a grindstone or blade. Further, as another method, a method of forming a spiral pattern directly on the surface of the laminated insulator may be used. More specifically, it is possible to draw a spiral by spraying a conductive material.

The end face electrode 8 is composed of a plurality of layers as generally known, and includes an underlayer composed of any conductive material, a nickel layer and a solder or tin layer.

The above-mentioned insulator layer 3 or dielectric layer 5 is generally formed by a generally known green sheet molding method or printing method, but can also be formed by a dipping method, a powder molding method or a spin coating method. The electrode layer 6 or the end face electrode 8 is generally printed by a method such as pattern formation using a laser, a method of transferring a conductor previously formed into a predetermined shape by a mold or plating, dropping, potting or spraying. It may be a method.

Since the electronic component obtained by the manufacturing method of the present invention is a composite component having excellent heat resistance, it 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,
By simultaneously connecting the wiring of the substrate and the end face electrode 8 of the composite component, integration or assembly is possible. In this case, a window is opened at a predetermined position on the substrate, and the end surface electrode 8 on the side surface of the composite component
And a wiring on the ceramic substrate, and 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 8 of the composite component are not premised on soldering, but may be fired and electrically connected.

The pastes or slurries for forming each of the above-mentioned layers include powders and solvents such as butyl carbitol, terpineol and alcohol, binders such as ethyl cellulose, polyvinyl butyral, polyvinyl alcohol, polyethylene oxide and ethylene-vinyl acetate;
Further, a sintering aid such as various oxides or glasses may be added, and a plasticizer or a dispersant such as butylbenzyl phthalate, dibutyl phthalate, or glycerin may be added. Each layer is formed using a kneaded material obtained by mixing these. These are laminated in a predetermined structure as described above and fired to obtain a composite part. As a slurry for producing a green sheet, various solvents having excellent evaporation properties, such as butyl acetate, methyl ethyl ketone, triene, and alcohol, are preferable in place of the above-mentioned solvents.

The firing temperature range is from 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, the temperature needs to be around 900 ° C., and at 950 ° C. for an alloy of silver and palladium, nickel and palladium are used 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, 4 g of butylbenzyl phthalate, 24 g of methyl ethyl ketone and 24 g of butyl acetate were mixed with 100 g of titanium oxide powder and kneaded using a pot mill to prepare a dielectric slurry. .

Using this slurry, a dielectric green sheet having a thickness of 0.2 mm was prepared after drying using a coater.
The green sheet was formed on a PET film.

Using a dielectric green sheet, an electrode layer 6 was formed on a dielectric layer 5 as shown in FIG. The electrode layer 6 was formed using a commercially available conductor paste and a printing machine. The conductor paste is a silver paste.

These dielectric layers 5 were laminated as shown in FIG. A hot press was used for lamination, the platen temperature of the hot press was set to 100 ° C., and the pressure was 500 kg / cm ² .

The laminate was fired at 900 ° C. for 2 hours.

NiZnCu-based ferrite, which is a magnetic material, was selected as the insulator. Therefore, the insulator layer 3 becomes a ferrite layer as shown below.

8 g of butyral resin, 4 g of butylbenzyl phthalate, 24 g of methyl ethyl ketone and 24 g of butyl acetate were mixed with 100 g of NiZnCu-based ferrite powder and kneaded using a pot mill to prepare a ferrite slurry.

Using this slurry, a ferrite green sheet having a thickness of 0.2 mm was formed after drying using a coater. The green sheet was formed on a PET film.

Using a ferrite green sheet, FIG.
Were laminated as shown in FIG. Further, it was fired. The conductor 4 was formed on the entire surface of the fired laminate, and the conductor 4 was formed into a spiral pattern as shown in FIG. The conductor 4 was made of copper, and the conductor 4 was cut into a spiral by using a laser to form the conductor 4 in a spiral shape.

The coil part 1 and the capacitor part 2 obtained by the above method were integrated as shown in FIG. 1, and an end face electrode 8 was formed as shown in FIG. The end face electrode 8 was manufactured by first forming a base using a dry-curing paste having silver powder, and then forming a nickel layer and a solder layer by a plating method.

Various electrical characteristics of the composite component of the present invention produced by the above method were measured using an impedance analyzer or a network analyzer.
The composite part had excellent characteristics.

In the same manner, the L-type filter shown in FIG. 3, the T-type filter shown in FIG. 4, and the π-type filter shown in FIG. 5 were produced using the green sheets previously produced.

Further, when the composite component obtained by the same method as described above was measured for various electric characteristics using an impedance analyzer or a network analyzer, it was found that the composite component also showed excellent electric characteristics.

[0058]

As is clear from the above description, the composite parts of the present invention can be easily manufactured and separately, and have great industrial value to exhibit excellent electrical characteristics.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a laminate showing an embodiment of a composite part according to the present invention.

FIG. 2 is an external perspective view showing one embodiment of the composite part of the present invention.

FIG. 3 is a schematic lamination diagram showing still another embodiment of the composite component of the present invention.

FIG. 4 is a schematic lamination diagram showing still another embodiment of the composite component of the present invention.

FIG. 5 is a schematic lamination diagram showing still another embodiment of the composite component of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil part 2 Capacitor part 3 Insulator layer 4 Conductor 5 Dielectric layer 6 Electrode layer 7 Terminal 8 End electrode 9 Exterior material

Continued on the front page F term (reference) 5E070 AA05 AB02 BA12 CC01 CC03 5E082 AB03 BB02 BC40 DD08 DD09 EE04 EE23 EE35 FG06 FG26 FG54 GG10 GG28 JJ09 JJ23 MM05 MM24

Claims (7)

[Claims] An end face of a capacitor having terminals of a coil conductor on opposing end faces and having terminals on adjacent end faces, wherein an end face having one terminal and an end face having a coil terminal are parallel to one end face. A composite component that is connected to electrodes and the other capacitor terminal and coil terminal are connected to different end electrodes. 2. One end face of a capacitor having terminals of a coil conductor on adjacent end faces and having terminals on opposite end faces, wherein an end face having one terminal and an end face having terminals of the coil are parallel to each other. A composite component that is connected to electrodes and the other capacitor terminal and coil terminal are connected to different end electrodes. 3. A terminal of the coil conductor is provided on an opposite end surface, and an intermediate terminal of the coil conductor is provided on a side surface thereof.
A composite component in which the intermediate terminal is connected to one terminal of a capacitor having terminals on opposite end faces, and the terminal of the other capacitor and the terminal of the coil are connected to different end face electrodes. 4. A common electrode of a capacitor having a terminal of a coil conductor on an opposite end face and having a terminal connected to an independent electrode on the opposite end face and a terminal connected to a common electrode on a side face thereof. A composite component in which the connected terminals are connected to one end face electrode, and the terminals on the opposite end faces of the capacitor and the coil are connected to different end face electrodes. 5. The composite component according to claim 1, wherein the coil conductor is provided on a surface of the element body made of an insulator. 6. The composite part according to claim 5, wherein the coil conductor is spiral. 7. A step of forming an insulator layer, a step of forming a dielectric layer, a step of forming a conductor for a coil on the surface of the insulator layer, and a step of forming an electrode layer for a capacitor on the surface of the dielectric layer. Forming a capacitor, forming a capacitor by laminating a dielectric layer on which a capacitor electrode layer is formed or a dielectric layer not formed thereon, and forming a conductor for a coil on the surface of the insulator layer And a step of forming an end face electrode on the surface by integrating the capacitor and a capacitor.