JP2000243909A - Composite filter and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite filter with good performance at low manufacturing cost, and provide its manufacturing method. SOLUTION: A composite filter includes an insulating substrate 11, and a capacitor block 14 as a capacitor composed of laminated capacitor electrodes 12-1, 12-2, and 12-3 made of thermosetting resin containing metallic powder, along with alternately laminated insulating layers 13-1, 13-2, and 13-3 made of thermosetting resin containing dielectric powder in between. In addition, the composite filter includes a coil block 17 as an inductor composed of laminated inductor electrodes 16-1, 16-2, and 16-3 made of thermosetting resin containing metallic powder, along with alternately laminated insulating layers 15-1, 15-2, and 15-3 made of thermosetting resin containing magnetic powder in between.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a composite filter in which a capacitor, a resistor, an inductor, and the like used for removing noise of electronic equipment are combined, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, it has been widely practiced to mount a resistor or an inductor on a signal line or a capacitor between a signal line and a ground in order to remove noise of electronic equipment.

Further, a composite noise filter in which circuit elements such as a capacitor, a resistor, and an inductor are mounted on a substrate in combination has been put to practical use.

[0004]

However, when a combination of circuit elements such as a capacitor, a resistor, and an inductor is mounted on a substrate, a large area is required for arranging the circuit elements. There is a problem in that it is difficult to increase the density, and it is troublesome to mount, which tends to increase the cost.

A chip type LC composite filter formed by laminating a dielectric ceramic and a ferrite-based magnetic material has been put to practical use. However, this LC composite filter has the following problems.

(1) In this LC composite filter, a capacitor block formed by printing and laminating an internal electrode on a dielectric ceramic green sheet and a coil block formed by printing and laminating an internal electrode on a ferrite material green sheet are laminated. After that, it is manufactured by sintering at a high temperature of 850 ° C. or more. However, since it is manufactured by firing two kinds of ceramic materials, dielectric and magnetic, the change in characteristics due to the reaction during firing and the heat shrinkage There is a problem in that stress is easily generated in the substrate due to the difference, and the yield, reliability, and the like of the product are reduced due to occurrence of distortion, cracking, variation in physical characteristics, and the like. Also,
There is also a problem that the manufacturing process is complicated and the number of steps is large, which tends to increase the cost.

(2) In addition to the above LC composite filter,
After printing and laminating a capacitor electrode and an inductor electrode on a ceramic green sheet prepared by mixing a dielectric ceramic powder and a ferrite powder so as to have a predetermined dielectric constant and magnetic permeability, the laminate is heated to 950 ° C. or higher. LC composite filters manufactured by firing at high temperatures have also been put to practical use. However, this LC composite filter has a problem that the performance of the inductor is apt to be reduced as the frequency increases, since the dielectric between the inductor electrodes becomes the stray capacitance of the coil. Another problem is that the degree of freedom of the combination of the capacitor and the coil constant is low.

(3) Since the above-mentioned LC composite filters (1) and (2) are manufactured by firing dielectric ceramics and magnetic ceramics at a high temperature, the material of the electrodes formed inside the filters is limited. Besides being limited, the management of the process conditions for suppressing the reaction of the material at the time of firing is complicated, and the cost is likely to increase.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a composite filter which has good performance, is easy to manufacture and is inexpensive, and a method for manufacturing the same.

[0010]

According to the present invention, there is provided a composite filter comprising an insulating substrate, a capacitor electrode comprising a thermosetting resin containing metal powder, and a thermosetting resin containing dielectric powder. A capacitor block in which a capacitor is formed by alternately laminating insulating layers consisting of: an inductor electrode made of a thermosetting resin containing metal powder and a thermosetting resin containing magnetic powder A coil block in which an inductor is formed by alternately stacking insulating layers is provided.

Here, part or all of the capacitor electrode and the inductor electrode may be a thick film resistor made of a thermosetting resin containing carbon powder.

Further, the insulating layer of the capacitor block may be made of a thermosetting resin containing 5 wt% or more of ceramic dielectric powder, and the insulating layer of the coil block may be made of a magnetic powder. The electrode for a capacitor and the electrode for an inductor may be made of a thermosetting resin containing not less than 20 wt% of a metal powder. .

The capacitor block is divided into two parts at the center on the same laminated surface and is electrically insulated from each other. An insulating layer is provided between the first capacitor electrode and the first capacitor electrode. And two capacitors are formed by laminating a second capacitor electrode having a shape substantially overlapping with the first capacitor electrode with the coil block facing each other, and the coil block includes: A first inductor electrode having a spiral shape formed on the insulating layer, and a through-hole formed at a position corresponding to the center of the spiral of the first inductor electrode formed on the first inductor electrode. An insulating layer having a hole, and a second interface formed on the insulating layer and having one connection end at a position corresponding to the through hole in the insulating layer and extending from the connection end toward the edge of the insulating layer. And Kuta electrode, an insulating layer formed on the second inductor electrode may be one inductor is formed by being laminated.

In the above-mentioned capacitor block, a first capacitor electrode and a second capacitor electrode formed so as to face each other with an insulating layer interposed between the first capacitor electrode and the first capacitor electrode are laminated. Thus, a first capacitor is formed, and a second capacitor electrode and a third capacitor electrode formed to face each other with an insulating layer interposed therebetween are laminated. And the coil block is formed on an insulating layer, the first inductor electrode having a spiral shape and the first inductor electrode formed on the insulating layer. An insulating layer having a through hole at a position facing the center of the spiral of the first inductor electrode, and an insulating layer formed over the insulating layer at a position facing the through hole of the insulating layer; From the connection end has a connection end and a second inductor electrode extending towards the end edge of the insulating layer, the second
The inductor may be formed by laminating an insulating layer formed on the inductor electrode described above.

Further, the capacitor block is opposed to the first capacitor electrode, which is divided into two portions at the center on the same lamination surface, with an insulating layer interposed therebetween. And a second capacitor electrode having substantially the same area as the total area of the first capacitor electrode, thereby forming two capacitors. In place of the coil block,
A thick film resistor formed of a thermosetting resin containing carbon powder and having a shape substantially overlapping with the second capacitor electrode, which is formed to face the second capacitor electrode with an insulating layer interposed therebetween. It may be provided with a resistor block in which a body is laminated.

Further, the insulating substrate has a through hole at a central portion thereof, and the coil block has a first insulating layer having a through hole communicating with the through hole of the insulating substrate at a central portion. A first inductor electrode formed in two regions divided at the center on the first insulating layer, each having a spiral shape;
A through-hole formed on the electrode for the inductor and communicating with the through-hole of the insulating substrate;
A second insulating layer having a through hole also at a position opposing the center of each spiral of the inductor electrode, and opposing each through hole of the second insulating layer formed on the second insulating layer. A second inductor electrode having a connection end at a position corresponding to the through-hole and connecting the connection ends through a position facing the through-hole of the insulating substrate; and a third inductor formed on the second inductor electrode. And two inductors connected in series by being laminated with each other, and the capacitor block has a through hole in the insulating substrate and a through hole in each insulating layer of the coil block. A first capacitor electrode electrically connected to the second inductor electrode via a hole; and a first capacitor electrode opposed to the first capacitor electrode with an insulating layer interposed therebetween. Or it may be one in which the capacitor is formed by the second capacitor electrode are laminated.

Further, in the method of manufacturing a composite filter according to the present invention, which achieves the above object, a thick film resin paint obtained by dispersing a magnetic material powder in a thermosetting resin is screen-printed on an insulating substrate and subjected to thermosetting treatment. Steps of forming an insulating layer by performing the above process, and printing the inductor electrode pattern on the insulating layer using a thick-film resin paint in which a metal powder is dispersed in a thermosetting resin and performing a thermosetting process. Forming a coil block in which an inductor is formed by alternately repeating the steps of forming a coil, on the insulating substrate, for a capacitor using a thick-film resin paint in which metal powder is dispersed in a thermosetting resin. Between the step of forming a plurality of capacitor electrodes by screen-printing the electrode pattern and performing a thermosetting treatment, and between the plurality of capacitor electrodes. The process of screen printing a thick film resin paint in which a dielectric powder is dispersed in a thermosetting resin and performing a heat curing process to form an insulating layer is alternately repeated to form a capacitor block in which a capacitor is formed. Step, and, on the composite consisting of the coil block and the capacitor block, by screen-printing a resin-based conductor paint in which a metal powder is dispersed in a thermosetting resin and performing a thermosetting process, the inductor electrode of the coil block and The method is characterized in that it comprises a step of forming an external terminal electrode which electrically connects the capacitor electrode of the capacitor block and also connects to the outside.

Here, in the step of forming part or all of the capacitor electrode and the inductor electrode, carbon powder may be used instead of the metal powder dispersed in the thermosetting resin.

Instead of a thick resin paint in which a metal powder is dispersed in a thermosetting resin used in the step of forming the capacitor electrode and the inductor electrode,
Part or all of the capacitor electrode or the inductor electrode may be formed using a thick film resin paint in which carbon powder is dispersed in a thermosetting resin.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the composite filter and the method of manufacturing the same according to the present invention will be described below with reference to examples.

[0021]

FIG. 1 is an exploded perspective view showing a first embodiment of a composite filter according to the present invention.

As shown in FIG. 1, a composite filter 10 according to the first embodiment includes an insulating substrate 11, a capacitor electrode 12
_1, 12_2, 12_3 and insulating layers 13_1, 13_2
Are alternately stacked to form a capacitor, and a capacitor block 14, and an insulating layer 15_
1, 15_2, 15_3 and the electrode 16_1 for the inductor.
16_2 are alternately stacked to form a coil block 17 in which an inductor is formed.

The insulating substrate 11 is made of alumina, the capacitor electrodes 12_1, 12_2, and 12_3 are made of a thermosetting resin containing 20 wt% or more of metal powder, and the insulating layers 13_1 and 13_2 contain 5 wt% or more of ceramic dielectric powder. Insulating layer 15_1, 1
5_2 and 15_3 are made of a thermosetting resin containing 5 wt% or more of magnetic powder, and are used as inductor electrodes 16_1 and 16_3.
_2 is made of a thermosetting resin containing 20 wt% or more of metal powder.

Next, a method of manufacturing the composite filter 10 will be described.

First, each step of the first stage will be described.

One surface 11a of an alumina insulating substrate 11
Using a thick-film resin paint in which a metal powder is dispersed in a thermosetting resin in an amount of 20 wt% or more, the electrode patterns of the first capacitor electrodes 12_1 and 12_2 separated from each other at the center are screen-printed at 80 ° C. The first capacitor electrode 12_1,
12_2 is formed. On the edge 11c side of the insulating substrate 11 of the capacitor electrode 12_1, an external exposed end 12_1a for inputting a signal line is formed.
An external exposed end 12_2a for inputting a signal line is formed on the side of the other edge 11d of the insulating substrate 11 on the side of _2.

Next, the first capacitor electrodes 12_1,
A first insulating layer 13_1 is formed on 12_2 by screen-printing a thick-film resin paint in which 5 wt% or more of ceramic dielectric powder is dispersed in a thermosetting resin and performing a thermosetting process at 80 to 300 ° C. . The first insulating layer 1
In forming 3_1, the externally exposed ends 12_1a, 1
2_2a is formed so as to be kept exposed without being covered with the first insulating layer 13_1.

Next, a first insulating layer 13_1 is formed on the first insulating layer 13_1.
Of the first capacitor electrode 12 with the insulating layer 13_1
_1 and 12_2, the second capacitor electrode 12 facing
_3. The second capacitor electrode 12_3 is
It serves as a ground electrode of a capacitor formed between the first capacitor electrodes 12_1 and 12_2. Two external electrode connection ends 12_3a and 12_3a for grounding are formed on the edges 11e and 11f of the insulating substrate 11 of the second capacitor electrode 12_3. The material and forming method of the second capacitor electrode 12_3 are the same as those of the first capacitor electrodes 12_1 and 12_2.

Next, a second insulating layer 13_2 is formed on the second capacitor electrode 12_3. Second insulating layer 1
The material and the formation method of 3_2 are the same as those of the first insulating layer 13_1.

As described above, by alternately repeating the step of forming the capacitor electrode and the step of forming the insulating layer, the capacitor block 14 in which two capacitors are formed is formed.

Next, each step of the second stage will be described.

The other surface 11b of the insulating substrate 11 is screen-printed with a thick-film resin paint in which 5% by weight or more of magnetic powder is dispersed in a thermosetting resin, and is heat-cured at 80 to 300.degree. Of the insulating layer 15_1 is formed. This first insulating layer 15_1 corresponds to an undercoat layer of the inductor.

Next, a first inductor electrode 16_1 is formed on the first insulating layer 15_1 by using a thick resin paint in which a metal powder is dispersed in a thermosetting resin by 20% by weight or more.
Screen-printed spiral electrode pattern of
The first inductor electrode 16_1 is formed by performing a thermosetting treatment at 300 ° C. First inductor electrode 1
An external exposed end 16_1a is formed on the side of the edge 11c of the insulating substrate 11 of the insulating substrate 11 so that the first inductor electrode 16
_1, a central connection end 16_1b is formed.

Next, a second insulating layer 15_2 having a through hole 15_2a at the center is formed on the first inductor electrode 16_1. The material and the formation method of the second insulating layer 15_2 are the same as those of the first insulating layer 15_1.

Next, a second insulating layer 15_2 is formed on the second insulating layer 15_2.
Is formed. The through-hole 1 is provided substantially at the center of the second inductor electrode 16_2.
A connection terminal 16 electrically connected to the center connection terminal 16_1b of the first inductor electrode 16_1 layer via 5_2a
_2b is formed, and on the edge 11d side of the insulating substrate 11,
An external electrode connection end 16_2a is formed. The material and forming method of the second inductor electrode 16_2 are the same as those of the first inductor electrode 16_1.

Next, a third insulating layer 15_3 is formed on the second inductor electrode 16_2. Third insulating layer 1
The material of 5_3 and the method of forming the first insulating layer 15_1
The same as in. This third insulating layer 15_3 is
It corresponds to the overcoat layer of the inductor.

As described above, the step of forming the inductor electrode and the step of forming the insulating layer are alternately repeated to form the coil block 17 on which the inductor is formed.
Is formed.

Finally, as a third step, external terminal electrodes are formed on the composite 18 including the coil block 17 and the capacitor block 14.

FIG. 2 is an external view of a composite filter in which external terminal electrodes are formed on a composite including a coil block and a capacitor block in the first embodiment.

As shown in FIG. 2, on the side surface 18a of the composite 18 composed of the coil block and the capacitor block, the first inductor electrode 16_1 of the coil block 17 (see FIG. 1) and the externally exposed end of the capacitor block 14 are provided. An external terminal electrode 19a is formed to electrically connect to the terminal 12_1a and also to connect to the outside. Similarly, the second side of the coil block 17 (see FIG. 1) is provided on the side surface 18b.
Electrode for inductor 16_2 and capacitor block 14
Terminal electrode 19 for connecting to the external exposed end 12_2a of the
b, and external terminal electrodes 19c, 19d connected to the two external exposed ends 12_3a, 12_3a of the capacitor block 14 are formed on the side surfaces 18c, 18d. These external terminal electrodes 19a, 19b, 19c, 19d are:
A resin-based conductor paint in which a metal powder is dispersed in a thermosetting resin in an amount of 20 wt% or more is printed on the side surface on which each external terminal electrode is formed, subjected to a thermosetting treatment, and then subjected to nickel plating and solder plating. .

FIG. 3 is an equivalent circuit diagram of the composite filter of the first embodiment.

As shown in FIG. 3, the composite filter 10
Form an equivalent circuit of an LC composite noise filter including an inductor 10a, capacitors 10b and 10c, external terminal electrodes 10d and 10e, and a ground electrode 10f.

In the composite filter 10 of this embodiment,
As shown in FIG. 1, the capacitor block 14 and the coil block 17 are formed on different surfaces of the insulating substrate 11, but the capacitor block 14 and the coil block 17 are formed on the same surface of the insulating substrate 11. It may be formed.

In this embodiment, the capacitor block is formed as the first step and the coil block is formed as the second step. However, the order of forming the capacitor block and the coil block is changed, and the coil block is formed. The block may be formed first, and then the capacitor block may be formed. (Second Embodiment) FIG. 4 is an exploded perspective view showing a second embodiment of the composite filter of the present invention.

As shown in FIG. 4, a composite filter 20 according to the second embodiment includes an insulating substrate 21 and an electrode 22 for a capacitor.
_1, 22_2, 22_3 and insulating layers 23_1, 23_
2, 23_3 are alternately laminated to form a capacitor, and a capacitor block is formed. Insulating layers 25_1, 25_2, 25_3 and inductor electrodes 26_1, 26_2 are alternately laminated to form an inductor. And a coil block 27.

The composite filter 20 of the second embodiment has a coil block 27 shown in FIG. 1 except that the internal structure of the capacitor block 24 is different from that of the capacitor block 14 of the composite filter 10 of the first embodiment. First
Coil block 17 in composite filter 10 of embodiment
In the following description, only the step of forming the capacitor block 24 will be described.

In the step of forming the capacitor block 24, the first capacitor electrode is formed on one surface 21a of the insulating substrate 21 by using a thick film resin paint in which a metal powder is dispersed in a thermosetting resin by 20% by weight or more. The first electrode 22_1 for the capacitor is formed by screen-printing the electrode pattern 22_1 and performing a thermosetting treatment at 80 ° C. to 300 ° C. The insulating substrate 2 of the first capacitor electrode 22_1
An externally exposed end 22_1a for inputting a signal line is formed on one end edge 21d side of the first.

Next, on the first capacitor electrode 22_1, a thick-film resin paint in which a ceramic dielectric powder is dispersed in a thermosetting resin in an amount of 5 wt% or more is screen-printed.
The first insulating layer 23_1 is formed by performing a heat curing treatment at a temperature of 300C to 300C. Note that when forming the first insulating layer 23_1, the externally exposed end 22_1a is formed so as to be kept exposed without being covered with the first insulating layer 23_1.

Next, a first insulating layer 23_1 is formed on the first insulating layer 23_1.
Of the first capacitor electrode 22 with the insulating layer 23_1
The first capacitor electrode 22_2 opposed to the first capacitor 22_1 is formed. The second capacitor electrode 22_2 serves as a ground electrode of a capacitor formed between the second capacitor electrode 22_2 and the first capacitor electrode 22_1. External electrode connection ends 22_2a, 22_2a are formed on the edges 21e, 21f of the insulating substrate 21 of the second capacitor electrode 22_2. The material and forming method of the second capacitor electrode 22_2 are the same as those of the first capacitor electrode 22_1.

Next, a second insulating layer 23_2 is formed on the second capacitor electrode 22_2. Second insulating layer 2
The material and the formation method of 3_2 are the same as those of the first insulating layer 23_1.
The same as in.

Next, a second insulating layer 23_2 is formed on the second insulating layer 23_2.
Of the second capacitor electrode 22 with the insulating layer 23_2
_2 and a third capacitor electrode 22_3 facing the second capacitor electrode _2. The insulating substrate 2 of the third capacitor electrode 22_3
On one edge 21c side, an external electrode connection end 22_3a for inputting a signal line is formed. The material and forming method of the third capacitor electrode 22_3 are the same as those of the first capacitor electrode 22_1.

Next, a third insulating layer 23_3 is formed on the third capacitor electrode 22_3. Third insulating layer 2
The material of 3_3 and the method of forming the first insulating layer 23_1
The same as in.

As described above, by alternately repeating the step of forming the capacitor electrode and the step of forming the insulating layer, the capacitor block 24 in which two capacitors are formed is formed.

The capacitor block 2 thus formed
By forming external terminal electrodes (see FIG. 2) similar to those in the first embodiment on the composite body including the coil block 27 and the coil block 27, an equivalent circuit (the same as the composite filter 10 in the first embodiment) 3) is completed. (Third Embodiment) FIG. 5 is an exploded perspective view showing a third embodiment of the composite filter according to the present invention.

As shown in FIG. 5, the composite filter 30 of the third embodiment has an insulating substrate 31, a capacitor electrode 32
_1, 32_2, 32_3 and insulating layers 33_1, 33_2
Are alternately stacked to form a capacitor, and a capacitor block 34 in which a capacitor is formed, and an insulating layer 33_
2, 35_1 and a thick-film resistor 36 are stacked. Resistor block 37
Are the capacitor electrodes 32_ of the capacitor block 34.
3 and a thick film resistor 36 made of a thermosetting resin containing carbon powder and having a shape substantially overlapping with the capacitor electrode 32_3 with the insulating layer 33_2 interposed therebetween. I have.

In the composite filter 30 of the third embodiment, since the internal structure of the capacitor block 34 is the same as that of the capacitor block 14 of the composite filter 10 of the first embodiment, the description of the formation of the capacitor block 34 is omitted. Only the step of forming the resistor block 37 will be described below.

The resistor block 37 is screen-printed on the second insulating layer 33_2 of the capacitor block 34 using a thick-film resin paint in which carbon powder is dispersed in a thermosetting resin by 20% by weight or more. The thick film resistor 36 is formed by performing a thermosetting treatment at 300 ° C., and the insulating layer 35_1 is formed on the thick film resistor 36. The thick film resistor 36 has a second insulating layer 3 of the capacitor block 34 in addition to the action as a resistor.
The second capacitor electrode 32 </ b> _ <b> 3 opposed across the 3 </ b> _ <b> 2
3 has a function of forming a capacitor. The material and the formation method of the insulating layer 35_1 are the same as those of the second insulating layer 33_2 of the capacitor block 34. Both end edges 31c of the insulating substrate 31 of the thick film resistor 36,
On the 31d side, an externally exposed end 36a for signal line input,
36b are formed.

The capacitor block 3 thus formed
By forming an external terminal electrode (see FIG. 2) similar to that in the first embodiment on a composite composed of the resistor block 37 and the resistor block 37, the RC composite filter 30 having the equivalent circuit shown in FIG. Complete.

FIG. 6 is an equivalent circuit diagram of the composite filter according to the third embodiment.

As shown in FIG. 6, this composite filter 30
Are the RC composite element 30a, the capacitors 30b and 30c,
External terminal electrodes 30d and 30e, and ground electrode 30f
To form an equivalent circuit of the RC composite noise filter provided with. This RC composite element 30a is formed by the thick film resistor 36 shown in FIG. 5 and the second capacitor electrode 32_2. (Fourth Embodiment) FIG. 7 is an exploded perspective view showing a fourth embodiment of the composite filter according to the present invention.

As shown in FIG. 7, the composite filter 40 according to the fourth embodiment comprises an insulating substrate 41, an electrode 42 for a capacitor.
_1, 42_2, 42_3 and insulating layers 43_1, 43_2
And a capacitor block 44 in which a capacitor is formed by alternately stacking capacitors and an insulating layer 45_.
1, 45_2, 45_3 and the electrode for the inductor 46_1,
46_2 are alternately laminated to form a coil block 47 in which an inductor is formed.

The structure of the capacitor block 44 of the composite filter 40 of the fourth embodiment is shown in FIG. 1 except that the internal structure of the coil block 47 is slightly different from that of the coil block 17 of the composite filter 10 of the first embodiment. First
Since the configuration is the same as that of the capacitor block 14 in the composite filter 10 of the embodiment, only the step of forming the coil block 47 will be described below.

The difference from the first embodiment at the stage of forming the coil block 47 is that all of the first inductor electrodes 46_1 and the first inductor electrodes 46_
2 is that a portion near the outer exposed end 46_1a is formed of a thick film resistor made of a thermosetting resin containing 20 wt% or more of carbon powder.

The capacitor block 4 thus formed
By forming the same external terminal electrodes (see FIG. 2) as in the first embodiment on the composite composed of the coil block 47 and the coil block 47, the LCR composite noise filter 40 having the equivalent circuit shown in FIG. 8 is completed.

FIG. 8 is an equivalent circuit diagram of the composite filter of the fourth embodiment.

As shown in FIG. 8, the composite filter 40
Comprises an inductor 40a, capacitors 40b and 40c, external terminal electrodes 40d and 40e, and a ground electrode 40f.
Furthermore, the inductor 40a and the external terminal electrodes 40d, 40
e forms an equivalent circuit of an LCR composite noise filter in which resistors 40g and 40h are arranged. (Fifth Embodiment) FIG. 9 is an exploded perspective view showing a fifth embodiment of the composite filter according to the present invention.

As shown in FIG. 9, the composite filter 50 of the fifth embodiment comprises an insulating substrate 51, a capacitor electrode 52
_1, 52_2 and the insulating layers 53_1, 53_2 are alternately stacked to form a capacitor, and the capacitor block 54, and the insulating layers 55_1, 55_
2, 55_3 and inductor electrodes 56_1, 56_2,
And 56_3 are alternately stacked to form a coil block 57 in which an inductor is formed.

The composite filter 50 of the fifth embodiment is manufactured as follows.

First, each step of the first stage will be described.

A through hole 51g is formed in the center of an alumina insulating substrate 51. Next, an electrode pattern of the first capacitor electrode 52_1 is screen-printed on one surface 51a of the insulating substrate 51 using a thick-film resin paint in which a metal powder is dispersed in a thermosetting resin by 20% by weight or more.
The first capacitor electrode 52_1 is formed by performing a thermosetting treatment at 0 ° C. to 300 ° C.

Next, on the first capacitor electrode 52_1, a thick film resin paint in which 5% by weight or more of ceramic dielectric powder is dispersed in thermosetting resin is screen-printed.
The first insulating layer 53_1 is formed by performing a thermosetting treatment at a temperature of 300C to 300C.

Next, on the first insulating layer 53_1,
The second capacitor electrode 52_2 facing the first capacitor electrode 52_1 is formed with the first insulating layer 53_1 interposed therebetween. The second capacitor electrode 52_2 serves as a ground electrode of a capacitor formed between the second capacitor electrode 52_2 and the first capacitor electrode 52_1. Two external electrode connection ends 52_2a, 5_2 for grounding are provided on the edges 51e, 51f side of the insulating substrate 51 of the second capacitor electrode 52_2.
2_2a is formed. Second capacitor electrode 52_
The second material and the forming method are the same as those of the first capacitor electrode 5.
The same as in 2_1.

Next, a second insulating layer 53_2 is formed on the second capacitor electrode 52_2. Second insulating layer 5
The material and the formation method of 3_2 are similar to those of the first insulating layer 53_1.

As described above, by alternately repeating the step of forming the capacitor electrode and the step of forming the insulating layer, the capacitor block 54 in which the capacitor is formed is formed.

Next, each step of the second stage will be described.

On the other surface 51b of the insulating substrate 51, a thick film resin paint in which a magnetic material powder is dispersed in a thermosetting resin in an amount of 5 wt% or more is screen-printed and heat cured at 80 to 300 ° C. A first insulating layer 55_1 having a through hole 55_1a communicating with the through hole 51g of the insulating substrate 51 is formed in the portion. This first insulating layer 55
_1 corresponds to the undercoat layer of the inductor.

Next, on the first insulating layer 55_1, using a thick-film resin paint in which a metal powder is dispersed in a thermosetting resin by 20% by weight or more, the first insulating layer 55_1 is divided at a center portion on the first insulating layer 55_1. First inductor electrodes 56_1 and 56, each having a spiral shape, formed in the two divided regions.
— 2 is formed. First inductor electrodes 56_1, 5
6_2 on the side of the edges 51c and 51d of the insulating substrate 51,
Externally exposed ends 56_1a and 56_2a are formed, and center connection ends 56_1b and 56_2b are formed substantially at the center of each spiral of the inductor electrode 56_1.

Next, a second insulating layer 55_2 is formed on the first inductor electrode 56_1. In the center of the second insulating layer 55_2, the through hole 5 of the insulating substrate 51 is provided.
Through holes 55_2a communicating with 1g are formed, and through holes 55_2b, 55_2c are also formed at positions facing the central connection ends 56_1b, 56_2b of the first inductor electrodes 56_1, 56_2, respectively. The material and the formation method of the second insulating layer 55_2 are the same as those of the first insulating layer 55_1.

Next, a second insulating layer 55_2 is formed on the second insulating layer 55_2.
The electrode 56_3 for the inductor is formed. At a position of the second inductor electrode 56_3 facing each through hole 55_2b, 55_2c of the second insulating layer 55_2,
The connection ends 56_3b and 56_3c are formed, and the substantially central portion 56_3 of the second inductor electrode 56_3 is formed with the through hole 51g of the insulating substrate 51, the through hole 55_1a of the first insulating layer 55_1, and the second insulating layer 55_2.
Is formed at a position facing the through hole 55_2a.

Next, a third insulating layer 55_3 is formed on the second inductor electrode 56_3. This third insulating layer 55_3 corresponds to an overcoat layer of the inductor. The material and forming method of the second inductor electrode 56_3 are the same as in the first inductor electrode 56_1, and the material and forming method of the third insulating layer 55_3 are the same as in the first insulating layer 55_1. is there.

By forming the second inductor electrode 56_3, the first inductor electrode 56_1,
The respective center connection ends 56_1b and 56_2b of 56_2 are
Through holes 55_2b and 55 of second insulating layer 55_2
_2c, the two inductors electrically connected to the connection terminals 56_3b and 56_3c of the second inductor electrode 56_3 and connected in series with each other.
7 are formed.

Further, the second inductor electrode 56_3
Is the second insulating layer 55_2 in the central portion 56_3a.
Are electrically connected to the first capacitor electrode 52_1 of the capacitor block 54 via the through hole 55_2a, the through hole 55_1a of the first insulating layer 55_1, and the through hole 51g of the insulating substrate 51.

The capacitor block 5 thus formed
By forming external terminal electrodes (see FIG. 2) similar to those in the first embodiment on the composite composed of the coil block 57 and the coil block 57, the LC composite filter 50 having the equivalent circuit shown in FIG. 10 is completed.

FIG. 10 is an equivalent circuit diagram of the composite filter of the fifth embodiment.

As shown in FIG. 10, this composite filter 5
0 indicates inductors 50a and 50b, capacitor 50c,
An equivalent circuit of an LC composite noise filter including the external terminal electrodes 50d and 50e and the ground electrode 50f is formed. (Sixth Embodiment) FIG. 11 shows a sixth embodiment of the composite filter according to the present invention.
It is an exploded perspective view showing an example.

As shown in FIG. 11, the composite filter 60 of the sixth embodiment has an insulating substrate 61, insulating layers 65_1, 6
5_2, 65_3 and inductor electrodes 66_1, 66_
, 66_3 are alternately stacked to form an inductor, and a coil block 67, and capacitor electrodes 62_1, 62_2, 62_3 and insulating layer 63
_1 and 63_2 are alternately stacked to form a capacitor block 64 in which a capacitor is formed.

The composite filter 60 according to the sixth embodiment is manufactured as follows.

First, the coil block 6 is placed on the insulating substrate 61.
Each step of forming 7 will be described.

Thick film resin paint in which magnetic powder is dispersed in a thermosetting resin in an amount of 5 wt% or more is screen-printed on an alumina insulating substrate 61, and the first insulating film is thermally cured at 80 to 300 ° C. The layer 65_1 is formed. This first insulating layer 65_1 corresponds to an undercoat layer of the inductor.

Next, the first insulating layer 65_1 is divided at the center on the first insulating layer 65_1 by using a thick-film resin paint in which a metal powder is dispersed in a thermosetting resin by 20% by weight or more. First inductor electrodes 66_1 and 66, each having a spiral shape, formed in the two formed regions.
— 2 is formed. First inductor electrodes 66_1, 6
6_2 on the edge 61c, 61d side of the insulating substrate 61,
Externally exposed ends 66_1a and 66_2a are formed, and center connection ends 66_1b and 66_2b are formed at substantially the center of each spiral of the inductor electrode 66_1.

Next, the first inductor electrodes 66_1,
The first inductor electrodes 66_1, 6
The through holes 65_2a and 65_2b are provided at positions facing the central connection ends 66_1b and 66_2b of the 6_2, respectively.
The second insulating layer 65_2 having the following formula is formed. The material and the formation method of the second insulating layer 65_2 are as follows.
_1.

Next, a second insulating layer 65_2 is formed on the second insulating layer 65_2.
Through holes 65_2a, 65_ of the insulating layer 65_2
A second inductor electrode 66_3 is formed to extend over a region including a position facing 2b.

Next, a third insulating layer 65_3 is formed on the second inductor electrode 66_3. This third insulating layer 65_3 corresponds to an overcoat layer of the inductor. The material and forming method of the second inductor electrode 66_3 are the same as those of the first inductor electrode 66_1, and the material and forming method of the third insulating layer 65_3 are the same as those of the first insulating layer 65_1. is there.

By forming the second inductor electrode 66_3, the first inductor electrode 66_1,
Each of the center connection ends 66_1b and 66_2b of the 66_2
Through holes 65_2a and 65_2b of insulating layer 65_2
Are electrically connected to the second inductor electrode 66 </ b> _ <b> 3 to form two inductors connected in series with each other in the coil block 67.

Next, a process of forming the capacitor block 64 on the coil block 67 will be described.

The third insulating layer 65_ of the coil block 67
The electrode pattern of the first capacitor electrode 62_1 is screen-printed on the third electrode 3 using a thick-film resin paint in which a metal powder is dispersed in a thermosetting resin in an amount of 20 wt% or more, and 80 ° C.
The first capacitor electrode 62 </ b> _ <b> 1 is formed by performing a thermosetting treatment at a temperature of about 300 ° C. The first capacitor electrode 62_1 serves as a ground electrode of a capacitor formed between the first capacitor electrode 62_1 and the second capacitor electrode 62_2.
Two external electrode connection ends 62_1a and 62_1a for grounding are formed on the edges 61e and 61f of the insulating substrate 61 of the first capacitor electrode 62_1.

Next, a thick film resin paint in which a ceramic dielectric powder is dispersed in a thermosetting resin in an amount of 5 wt% or more is screen-printed on the first capacitor electrode 62_1.
The first insulating layer 63_1 is formed by performing a thermosetting treatment at a temperature of 300C to 300C.

Next, on the first insulating layer 63_1, the first
The second capacitor electrodes 62_2 and 62_3 are formed in two regions divided at the center on the insulating layer 63_1. Of the second capacitor electrodes 62_1 and 62_3,
Two external electrode connection ends 62_2a and 62_3a for grounding are formed on the edges 61c and 61d of the insulating substrate 61. The material and forming method of the second capacitor electrodes 62_2 and 62_3 are as follows.
The same as in.

Next, the second capacitor electrode 62_2,
A second insulating layer 63_2 is formed over 62_3. Second
The material and forming method of the insulating layer 63_2 are the same as those of the first insulating layer 63_1.

As described above, by alternately repeating the step of forming the capacitor electrode and the step of forming the insulating layer, two electrodes are formed by the first capacitor electrode 62_1 and the second capacitor electrodes 62_2 and 62_3. Although the capacitor is formed inside the capacitor block 64, in the sixth embodiment, the first capacitor electrode 62_1 and the second second inductor electrode 66 of the coil block 67 are provided.
_3 to form a third capacitor.

By forming external terminal electrodes (see FIG. 2) similar to those in the first embodiment on the composite formed of the insulating substrate 61, the coil block 67, and the capacitor block 64 thus formed, FIG. The LC composite filter 60 having the equivalent circuit shown is completed.

FIG. 12 is an equivalent circuit diagram of the composite filter according to the sixth embodiment.

As shown in FIG. 12, the composite filter 6
0 indicates inductors 60a, 60b, capacitors 60c,
An equivalent circuit of an LC composite noise filter including 60d and 60e, external terminal electrodes 60f and 60g, and a ground electrode 60h is formed. (Seventh Embodiment) FIG. 13 is an equivalent circuit diagram of a composite filter according to a seventh embodiment.

As shown in FIG. 13, the composite filter 70 of the seventh embodiment has inductors 70a and 70b,
0c, 70d, capacitor 70e, external terminal electrode 70
f, 70g, and an equivalent circuit of an LC composite filter including the ground electrode 70h. The composite filter 70 of the seventh embodiment is similar to the composite filter 50 of the fifth embodiment shown in FIG. 10, and the difference between the two is that the composite filter 70 has a series connection between the inductors 70a and 70b. Is connected to the capacitor 70e, and the connection point of the resistors 70c and 70d is electrically connected to the capacitor 70e.

This composite filter 70 can be manufactured as follows.

The composite filter 5 according to the fifth embodiment shown in FIG.
In the step of forming the second inductor electrode 56_3 in the step of forming the zero coil block 57, instead of the thick film resin paint in which the metal powder is dispersed in the thermosetting resin by 20% by weight or more, the carbon powder is used instead of the thermosetting resin. 20wt
% Of the second inductor electrode 56_3 using the thick film resin paint dispersed in the center portion 56_3.
3a is the first capacitor electrode 5 of the capacitor block
A thick film resistor electrically connected to 2_1 is formed. As shown in FIG. 13, an inductor 70a, a resistor 70c, a resistor 70d, and an inductor 70b are connected in series, and a resistor 7
An equivalent circuit is formed in which the contact point between 0c and the resistor 70d is electrically connected to the capacitor 70e. (Eighth Embodiment) FIG. 14 is an equivalent circuit diagram of the composite filter of the eighth embodiment.

As shown in FIG. 14, the composite filter 80 of the eighth embodiment has an LCR including inductors 80a and 80b, an RC composite element 80c, capacitors 80d and 80e, external terminal electrodes 80f and 80g, and a ground electrode 80h. An equivalent circuit of the composite noise filter is formed. This 8th
The composite filter 80 of the embodiment is similar to the composite filter 60 of the sixth embodiment shown in FIGS. 11 and 12, and the difference between the two is that the composite filter 80 is different from the composite filter 6 of the sixth embodiment.
0 instead of capacitor 60d, inductor 8
The point is that an RC composite element 80c is formed between Oa and 80b.

This composite filter 80 can be manufactured as follows.

In the composite filter 60 of the sixth embodiment shown in FIG. 11, in the step of forming the second inductor electrode 66_3 in the step of forming the coil block 67, the metal powder is dispersed in the thermosetting resin by 20 wt% or more. Instead of thick film resin paint, add 20 carbon powders to thermosetting resin.
A thick-film resistor having the same shape as the second inductor electrode 66_3 is formed using a thick-film resin paint dispersed in an amount of not less than wt%. By doing so, the thick film resistor and the first capacitor electrode 62 of the capacitor block 64 are formed.
_1 and a thick-film resistor, and the second insulating layer 65_ of the coil block 67
The first inductor electrodes 66_1, 66_1 of the coil block 67 via the second through holes 65_2a, 65_2b.
6_2, the inductor 80a, the RC composite element 80c, and the inductor 80b as shown in FIG.
Are connected in series to form an equivalent circuit. (Ninth Embodiment) FIG. 15 shows a ninth embodiment of the composite filter according to the present invention.
It is an exploded perspective view showing a coil block in an example.

As shown in FIG. 15, in the coil block 97 of the composite filter according to the ninth embodiment, an insulating layer 95_
1,95_2,95_3,95_4,95_5,95_
6, and inductor electrodes 96_1, 96_2, 96_3
The inductors are formed by alternately stacking 96_4 and 96_5.

The coil block 97 of the composite filter according to the ninth embodiment is obtained by increasing the number of coil turns by changing the pattern and the number of inductor electrodes in the coil block 17 of the composite filter 10 shown in FIG. It is an example. That is, in the coil block 97 of this embodiment, 5
Layer electrodes 96_1, 96_2, 96_3
96_4, 96_5 are four insulating layers 95_2, 95_3, 95_ sandwiched between these inductor electrodes.
4, 95_5, through holes 95_ provided respectively.
A coil having approximately two and a half turns is formed by being electrically connected to each other through 2a, 95_3a, 95_4a, and 95_5a. In addition, of the five layers of inductor electrodes, the outermost inductor electrodes 96_1,
96_5 have external connection terminals 96_1a and 96_5, respectively.
a is formed.

As described above, a coil block having a desired number of turns can be formed by appropriately setting the pattern and the number of layers of the inductor electrode. (Tenth Embodiment) FIG. 16 is an exploded perspective view showing a tenth embodiment of the composite filter of the present invention.

As shown in FIG. 16, the composite filter 100 of the tenth embodiment includes an insulating substrate 101, an insulating layer 105
_1, 105_2, 105_3 and inductor electrode 10
6_1 and 106_2 are alternately stacked to form an inductor, thereby forming a coil block 107, and capacitor electrodes 102_1, 102_2 and 102_.
3, 102_4 and insulating layers 103_1, 103_2, 10
3_3 are alternately stacked to form a capacitor block 104 in which a capacitor is formed.

The composite filter 100 of the tenth embodiment
Is a modified example of the composite filter 50 shown in FIG. 9, and the electrode pattern of the inductor formed in the coil block 107 is different from that of the composite filter 50. That is, in the composite filter 100 of the present embodiment, spiral electrode patterns are formed on the inductor electrodes 106_1 and 106_2, respectively, and the central part 106 of these spirals is formed.
_1a and 106_2a are electrically connected to each other, and the spiral central portions 106_1a and 106_2a are further electrically connected to the capacitor block 104.

The number of capacitors formed in the capacitor block 104 is smaller than that of the composite filter 50 shown in FIG.
In contrast to the above, there is only one.
At 00, there are two. That is, the composite filter 10
0, the combination of the capacitor electrode 102_1 and the capacitor electrode 102_2 and the capacitor electrode 102_2
_3 and the capacitor electrode 102_4 form a combination of two capacitors. The capacitor electrode 102_1 and the capacitor electrode 102_3 of these two capacitors are formed through the through holes 103_1a and 103_2a formed in the insulating layers 103_1 and 103_2. They are electrically connected to each other, and furthermore, the central part 1 of the spiral of the inductor electrodes 106_1 and 106_2 via the through holes 101a, 105_1a and 105_2a formed in the insulating substrate 101 and the insulating layers 105_1 and 105_2.
06_1a and 106_2a. Therefore,
The equivalent circuit of the composite filter 100 is the same as the equivalent circuit of the fifth embodiment shown in FIG.

By configuring the coil block and the capacitor block in this manner, the degree of freedom in setting the number of turns of the coil and the capacitance of the capacitor increases,
A desired composite filter can be designed. (Eleventh Embodiment) FIG. 17 is an exploded perspective view showing a coil block in an eleventh embodiment of the composite filter of the present invention.

As shown in FIG. 17, the coil block 117 of the composite filter according to the eleventh embodiment has an insulating layer 11
5_1, 115_2, 115_3, 115_4, 115
_5 and inductor electrodes 116_1, 116_2,.
116_9 are alternately stacked to form two inductors connected in series.

The coil block 117 of the composite filter according to the eleventh embodiment has an arrangement in which the number of turns of the coil is increased by changing the pattern and the number of layers of the inductor electrode in the coil block 57 of the composite filter 50 shown in FIG. It is an example. That is, in the coil block 117 of the present embodiment, the five-layer inductor electrodes 116_1, 116_2,
Each of two coil patterns formed in a predetermined pattern on each of 116_3, 116_4, and 116_5 has through-holes respectively provided on four insulating layers 115_2, 115_3, 115_4, and 115_5 sandwiched between these inductor electrodes. Hole 115_2a, 115
_2b, 115_3a, 115_3b, 115_4a,
Two inductors are formed by being electrically connected to each other through 115_4b, 115_5a, and 115_5b. The connection point 116_9a where the two inductors thus formed are connected to each other is connected to the insulating substrate 1
11 and through holes 111 provided in each insulating layer
c, 115_2c, 115_3c, 115_4c, 11
Through 5_5c, it is electrically connected to a capacitor electrode of a capacitor block (not shown).

By configuring the coil block in this manner, the degree of freedom in setting the number of turns of the coil is increased, and a desired composite filter can be designed.

[0120]

As described above, according to the composite filter and the method of manufacturing the same according to the present invention, a thick film resin paint in which metal powder, dielectric powder, magnetic powder or carbon powder is dispersed in thermosetting resin. Since the electrodes and the insulating layer are formed using, it can be manufactured by screen printing and low-temperature firing, and a chip-type composite filter can be formed by freely combining a capacitor, an inductor, a resistor, and the like. Can be. Therefore, as compared with the conventional composite filter and its manufacturing method, the process is simplified and the degree of freedom in assembling the elements is improved, so that a high-performance and inexpensive composite filter and its manufacturing method can be realized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a composite filter according to the present invention.

FIG. 2 is an external view of a composite filter in which external terminal electrodes are formed on a composite including a coil block and a capacitor block according to the first embodiment.

FIG. 3 is an equivalent circuit diagram of the composite filter of the first embodiment.

FIG. 4 is an exploded perspective view showing a second embodiment of the composite filter according to the present invention.

FIG. 5 is an exploded perspective view showing a third embodiment of the composite filter according to the present invention.

FIG. 6 is an equivalent circuit diagram of a composite filter according to a third embodiment.

FIG. 7 is an exploded perspective view showing a fourth embodiment of the composite filter according to the present invention.

FIG. 8 is an equivalent circuit diagram of a composite filter according to a fourth embodiment.

FIG. 9 is an exploded perspective view showing a fifth embodiment of the composite filter according to the present invention.

FIG. 10 is an equivalent circuit diagram of a composite filter according to a fifth embodiment.

FIG. 11 is an exploded perspective view showing a sixth embodiment of the composite filter of the present invention.

FIG. 12 is an equivalent circuit diagram of a composite filter according to a sixth embodiment.

FIG. 13 is an equivalent circuit diagram of a composite filter according to a seventh embodiment.

FIG. 14 is an equivalent circuit diagram of the composite filter according to the eighth embodiment.

FIG. 15 is an exploded perspective view showing a coil block in a ninth embodiment of a composite filter according to the present invention.

FIG. 16 is an exploded perspective view showing a tenth embodiment of a composite filter according to the present invention.

FIG. 17 is an exploded perspective view showing a coil block in an eleventh embodiment of the composite filter according to the present invention.

[Explanation of symbols]

Reference Signs List 10 composite filter 10a inductor 10b, 10c capacitor 10d, 10e external terminal electrode 10f ground electrode 11 insulating substrate 11a, 11b surface 11c, 11d, 11e, 11f edge 12_1, 12_2, 12_3 capacitor electrode 12_1a, 12_2a external exposed end 13_1, 13_2 Insulation layer 12_3a, 12_3a External electrode connection end 14 Capacitor block 15_1, 15_2, 15_3 Insulation layer 15_2a Through hole 16_1, 16_2 Inductor electrode 16_1a External exposed end 16_1b Central connection end 16_2a External electrode connection end 16_2b Connection end 18 Coil block 17 Composite body 18a, 18b, 18c, 18d Side surface 19a, 19b, 19c, 19d External terminal electrode 20 Composite filter 21 Insulating substrate 21a, 2 1b surface 21c, 21d, 21e, 21f Edge 22_1, 22_2, 22_3 Capacitor electrode 22_1a External exposed end 22_2a, 22_2a External electrode connection end 23_1, 23_2, 23_3 Insulating layer 24 Capacitor block 25_1, 25_2, 25_3 Insulating layer 26_1, 26_2 Inductor electrode 27 Coil block 30 Composite filter 30a RC composite element 30b, 30c Capacitor 30d, 30e External terminal electrode 30f Ground electrode 31 Insulating substrate 31c, 31d Edge 32_1, 32_2, 32_3 Capacitor electrode 33_1, 33_2 Insulating layer 34 Capacitor block 35_1 Insulating layer 36 Thick film resistor 36a, 36b Externally exposed end 37 Resistor block 40 Composite filter 40a Inductor 40b, 40c Capacitor 4 d, 40e External terminal electrode 40f Ground electrode 40g, 40h Resistance 41 Insulating substrate 42_1, 42_2, 42_3 Capacitor electrode 43 Insulating layer 44 Capacitor block 45_1, 45_2, 45_3 Insulating layer 46_1, 46_2 Inductor electrode 47 Coil block 46_1a External exposed end Reference Signs List 50 composite filter 50a, 50b inductor 50c capacitor 50d, 50e external terminal electrode 50f ground electrode 51 insulating substrate 51a, 51b surface 51c, 51d, 51e, 51f edge 51g through hole 52_1, 52_2 capacitor electrode 52_2a, 52_2a external electrode connection end 53_1, 53_2 Insulating layer 54 Capacitor block 55_1, 55_2, 55_3 Insulating layer 55_1a, 55_2a, 55_2b, 55_2c
Through hole 56_1, 56_2, 56_3 Inductor electrode 56_1a, 56_2a Externally exposed end 56_1b, 56_2b Center connection end 56_3a Center 56_3b, 56_3c Connection end 57 Coil block 60 Composite filter 60a, 60b Inductor 60c, 60d, 60e Capacitor 60f External terminal electrode 60h Ground electrode 61 Insulating substrate 61c, 61d, 61e, 61f Edge 62_1, 62_2, 62_3 Capacitor electrode 62_1a, 62_1a, 62_2a, 62_3a
External electrode connection end 63_1, 63_2 Insulating layer 64 Capacitor block 65_1, 65_2, 65_3 Insulating layer 65_2a, 65_2b Through hole 66_1, 66_2, 66_3 Inductor electrode 66_1a, 66_2a External exposed end 66_1b, 66_2b Central connection end 67 Coil block 70 Composite Filter 70a, 70b Inductor 70c, 70d Resistance 70e Capacitor 70f, 70g External terminal electrode 70h Earth electrode 80 Composite filter 80a, 80b Inductor 80c RC composite element 80d, 80e Capacitor 80f, 80g External terminal electrode 80h Earth electrode 97 Coil block 95_1, 95_2 , 95_3,95_4,95_5
95_6 Insulating layer 95_2a, 95_3a, 95_4a, 95_5a
Through hole 96_1, 96_2, 96_3, 96_4, 96_5
Inductor electrode 96_1a, 96_5a External connection terminal 100 Composite filter 101 Insulating substrate 101a, 105_1a, 105_2a Through hole 102_1, 102_2, 102_3, 102_4
Capacitor electrodes 103_1, 103_2, 103_3 Insulating layers 103_1a, 103_2a 104 Capacitor blocks 105_1, 105_2, 105_3 Insulating layers 105_1, 105_2, 105_3 Through holes 106_1, 106_2 Inductor electrodes 106_1a, 106_2a Central part 107 Coil blocks 115_1, 115_2, 115_3 115_4,1
15_5 Insulating layers 111c, 115_2a, 115_2b, 115_2
c, 115_3a, 115_3b, 115_3c, 11
5_4a, 115_4b, 115_4c, 115_5
a, 115_5b, 115_5c Through holes 116_1, 116_2, ..., 116_9 Inductor electrode 117 Coil block

Claims (11)

[Claims] A capacitor is formed by alternately laminating an insulating substrate, a capacitor electrode made of a thermosetting resin containing metal powder, and an insulating layer made of a thermosetting resin containing dielectric powder. Capacitor block,
And an inductor electrode made of a thermosetting resin containing metal powder and an insulating layer made of a thermosetting resin containing magnetic powder are alternately laminated to form a coil block in which an inductor is formed. A composite filter, characterized in that: 2. The capacitor according to claim 1, wherein a part or all of the capacitor electrode and the inductor electrode is a thick film resistor made of a thermosetting resin containing carbon powder. Composite filter. 3. The composite filter according to claim 1, wherein said insulating layer of said capacitor block is made of a thermosetting resin containing 5 wt% or more of ceramic dielectric powder. 4. The composite filter according to claim 1, wherein the insulating layer of the coil block is made of a thermosetting resin containing 5 wt% or more of magnetic substance powder. 5. The composite filter according to claim 1, wherein the capacitor electrode and the inductor electrode are made of a thermosetting resin containing 20 wt% or more of metal powder. 6. A first capacitor electrode, wherein the capacitor block is divided into two parts at the center on the same laminated surface and is electrically insulated from each other, and is insulated between the first capacitor electrodes. Two capacitors are formed by laminating a second capacitor electrode having a shape substantially overlapping with the first capacitor electrode facing each other with a layer interposed therebetween, and the coil block is ,
A first inductor electrode having a spiral shape formed on the insulating layer, and a position corresponding to the center of the spiral of the first inductor electrode formed on the first inductor electrode An insulating layer having a through hole, and one connecting end formed on the insulating layer at a position corresponding to the through hole of the insulating layer, extending from the connecting end toward an edge of the insulating layer. The composite filter according to claim 1, wherein the inductor is formed by laminating the second inductor electrode and an insulating layer formed on the second inductor electrode. . 7. The capacitor block is formed by laminating a first capacitor electrode and a second capacitor electrode formed to face the first capacitor electrode with an insulating layer interposed therebetween. Thus, a first capacitor is formed, and a third capacitor electrode formed opposite to the second capacitor electrode with an insulating layer interposed between the second capacitor electrode and the second capacitor electrode. Are laminated to form the second
Wherein the coil block is formed on the first inductor electrode having a spiral shape and formed on the insulating layer, and the coil block is formed on the first inductor electrode. An insulating layer having a through hole at a position facing the center of the spiral of the first inductor electrode, and one connection end formed on the insulating layer at a position facing the through hole of the insulating layer. An inductor is formed by laminating a second inductor electrode extending from the connection end toward the edge of the insulating layer, and an insulating layer formed on the second inductor electrode. The composite filter according to claim 1, wherein 8. A first capacitor electrode in which the capacitor block is divided into two parts at a central portion on the same laminated surface, and an insulating layer interposed between the first capacitor electrode. Two capacitors are formed by laminating opposing second capacitor electrodes having substantially the same area as the total area of the first capacitor electrodes, and the two capacitors are formed instead of the coil block. A thickness of a thermosetting resin containing carbon powder, which is formed to face the second capacitor electrode with an insulating layer interposed therebetween, and has a shape substantially overlapping with the second capacitor electrode. 2. The composite filter according to claim 1, further comprising a resistor block formed by stacking film resistors. 9. A first insulating layer, wherein the insulating substrate has a through hole at a central portion, and the coil block has a through hole at a central portion communicating with the through hole of the insulating substrate; A first inductor electrode having a spiral shape formed in two regions divided at a center portion on the first insulating layer, and a first inductor electrode formed on the first inductor electrode; A second insulating layer having a through hole communicating with the through hole of the insulating substrate, and a second insulating layer having a through hole also at a position facing the center of each spiral of the first inductor electrode;
A connection end formed at a position facing each through-hole of the second insulating layer formed on the insulating layer of the second substrate, and connecting the connection ends through a position facing the through-hole of the insulating substrate. Two inductors connected in series by stacking a second inductor electrode and a third insulating layer formed on the second inductor electrode, A first capacitor electrode electrically connected to the second inductor electrode via a through hole in the insulating substrate and a through hole in each insulating layer of the coil block; A capacitor formed by laminating a second capacitor electrode opposed to the first capacitor electrode with an insulating layer interposed therebetween. Composite filter of claim 1, wherein. 10. A step of screen-printing a thick-film resin paint obtained by dispersing a magnetic substance powder in a thermosetting resin on an insulating substrate and performing a thermosetting process to form an insulating layer; An inductor is formed by alternately repeating the steps of screen printing an electrode pattern for the inductor using a thick film resin paint in which a metal powder is dispersed in a thermosetting resin and performing a thermosetting process to form the electrode for the inductor. Forming a coil block comprising a plurality of capacitors by screen-printing and thermosetting a capacitor electrode pattern on the insulating substrate using a thick-film resin paint in which metal powder is dispersed in a thermosetting resin. Forming a thick film resin pane in which a dielectric powder is dispersed in a thermosetting resin between the plurality of capacitor electrodes. Forming a capacitor block in which a capacitor is formed by alternately repeating the steps of screen printing and heat curing to form an insulating layer, and a composite comprising the coil block and the capacitor block, By screen printing and thermosetting a resin-based conductor paint in which a metal powder is dispersed in a thermosetting resin, the inductor electrode of the coil block and the capacitor electrode of the capacitor block are electrically connected and externally connected. Forming an external terminal electrode that also performs connection with the composite filter. 11. A thermosetting resin in which carbon powder is dispersed instead of a thick-film resin paint in which metal powder is dispersed in a thermosetting resin used in the step of forming the capacitor electrode and the inductor electrode. The method for manufacturing a composite filter according to claim 10, wherein a part or all of the capacitor electrode or the inductor electrode is formed using a thick-film resin paint.