JP2607433Y2 - Laminated integrated parts - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a laminated LC composite component which is formed integrally by superposing a composite inductor and a composite capacitor on a laminated structure of a sintered body to constitute an LC filter , or the laminated composite. The present invention relates to a laminated integrated component having an electronic component mounted on a component, and particularly to a structure for converting a distributed capacitance between inductors when used at a high frequency into a capacitance between an inductor and a ground.

[0002]

[Problems to be solved by the prior art and the invention] FIG.
(A) is a sectional view showing a conventional laminated integrated component constituting an LC filter. In this figure, reference numeral 1 denotes a laminated body in which a composite capacitor 2 composed of a plurality of capacitors and a composite inductor 3 composed of a plurality of inductors are superimposed. The laminated body 1 includes a dielectric 4 and a conductor 5, And magnetic material 6
And the conductor 7 are laminated by a printing method or a raw sheet, and then sintered. Reference numeral 8 denotes a terminal electrode formed by applying and baking a conductive paste to the side surface of the laminate 1. This laminated integrated component is a laminate 1
In some cases, the electronic component 9 may be used with only the electronic component 9 mounted.

FIG. 3B is a diagram showing an example of a circuit of an LC filter constituted by such a conventional laminated integrated component, and includes capacitors C _{1 to} C ₅ and inductors L ₁ and L _2.
But is formed inside of each composite capacitor 2, the composite inductor _{3, C 1, C 3,} C 5 in FIG. 3 (A) shows part of a _capacitor, L 1, _{L 2} is shows the inductor I have.

When such a laminated integrated component is used at a high frequency, as shown in FIG. 3C, the distributed capacitance C _S between the inductors L ₁ and L ₂ which can be ignored at a low frequency.
Can no longer be ignored, and the circuit configuration becomes very complicated,
In view of the above problems, the present invention has a problem that it is difficult to obtain desired characteristics in consideration of the distributed capacitance, and it is not necessary to consider the capacitance between inductors of the composite inductor. It is an object of the present invention to provide a laminated integrated component capable of easily obtaining the characteristics described above.

[0005]

Means for Solving the Problems] To achieve this object, the present invention includes a composite inductor comprising a plurality of inductors, and a capacitor, a sintered body of a laminated structure, together with the complex inductor and capacitor Superimpose LC
The laminated LC composite component constituting the filter , or the laminated L
In a multilayer integrated component in which an electronic component is mounted on a C composite component, the plurality of inductors are respectively formed by conductors that are formed side by side and helically in different regions in the sintered body, and the inductors are connected to each other. Between the connection point between the inductors and ground.
Serial capacitor is connected between each inductor, the conductor of the plurality of layers are connected to ground, that the conductors of each layer is formed so as to face each inductor conductor same layer on
More, between the conductors of the conductor and the inductor, the inductor
Parallel to the capacitor connected between the
A column-connected capacitor is formed.

[0006]

The laminated integrated component of the present invention has the above-mentioned structure, so that it is not necessary to consider the capacitance between inductors.

[0007]

FIG. 1A is a sectional view showing an embodiment of a laminated integrated component according to the present invention, and FIG. 1B is a circuit diagram thereof.
1, the same reference numerals as those in FIG. 3 denote members having the same functions. L ₁ and L ₂ are inductors formed by conductors having a helical structure side by side in different regions in the laminated integrated component 1 made of a sintered body, and a plurality of inductors L ₁ and L ₂ constitute a composite inductor 3. Figure 1
As shown in (B), the inductors L ₁ and L ₂ are connected to each other and function as one filter together with the other capacitors C _{1 to} C ₅ . Reference numeral 10 denotes a conductor which is provided in a plurality of layers between the inductors L ₁ and L ₂ in the composite inductor 3 and is connected to the ground. The conductor 10 is arranged such that the conductor of each layer faces the inductor conductor on the same layer. Formed.

As described above, when the conductor 10 connected to the ground is interposed between the conductors 7 of the inductors L ₁ and L ₂ , the circuit configuration becomes between the ground and the inductor conductor 7 as shown in FIG. This means that the capacitor _CS has been formed. In this case, the inductor conductor 7 and the ground conductor 1
Even if the capacitance of the capacitor C _S between 0 into account, be designed as a composite capacitance of the capacitor C _3, 3
This is equivalent to the circuit of (B), and a desired filter characteristic can be easily obtained.

FIG. 2 shows a part of the manufacturing process of the laminated integrated component of this embodiment by a printing method. First, as shown in FIG. 2A, a lower base 6a made of an electrically insulating magnetic paste or a dielectric paste in which ferrite powder is mixed into a binder is printed on the multilayer capacitor 2.

Next, as shown in FIG. 1B, an external connection conductor 7a made of a conductor paste in which a metal powder such as Ag, Ag-Pd, Cu, Ni, Pd or the like connected to a terminal electrode 11 described later is mixed in a binder. At the same time, printing is performed so that one end thereof reaches the side surface of the component, and at the same time, two sets of half coils (beginning of coil winding) 7b and 7c connected to the conductor 7a are printed with a conductor paste.

Next, as shown in FIG. 3C, an inductor interlayer magnetic material or dielectric 6b made of an electrically insulating magnetic paste or dielectric paste is placed between the two sets of half coils 7b and 7c. Printing is performed so as to cover the inner half surface other than the connection portions of 7b and 7c, and then, as shown in (d), the conductor 10 connected to the ground is printed on the inductor interlayer magnetic material or dielectric 6b,
Half coil 7 connected to the half coils 7b and 7c
d and 7e are printed.

Next, as shown in (e), the outer half surface other than the connection portion of the two sets of half coils 7d and 7e is covered.
A magnetic material or dielectric material 6c, 6d is printed between the inductor layers, and the half coil 7 is formed thereon as shown in FIG.
The half coils 7f and 7g connected to d and 7e are printed.

Next, as shown in (g), between the two sets of half coils 7f and 7g, a magnetic material or dielectric 6e between the inductors is provided so as to cover the inner half surface other than the connection between the half coils 7f and 7g. Print on

Then, returning to the above step (d), (d)
(G) are repeated by the number of turns of the inductor, and as shown in (h), half coils (end of coil winding) 7h and 7i connected to the half coils 7f and 7g.
Then, the conductors 7j and 7k for connecting the coil to the outside are printed. Next, as shown in (i), the upper base 6f is printed with a magnetic or dielectric paste and fired together with the multilayer capacitor. Then, as shown in (j), half the coil 7b, 7d, 7f, an inductor _{L 1,} which is constituted by 7h, half coils 7c, 7e, 7g, the conductor 10 between the inductor _{L 2,} which is constituted by 7i A terminal electrode 11 that connects to the ground; a terminal electrode 12 that connects the connection conductor 7a of the inductors L ₁ and L _{2 to one} electrode of the capacitors C ₂ , C ₃ and C ₄ ;
T is formed by baking.

The structure of the present invention can also be realized by stacking green sheets, pressing and firing. When a raw sheet is used, a magnetic sheet having through-holes formed in advance and a coil conductor formed on the surface, for example, for each turn, is laminated and integrally formed, followed by firing.

[0016]

According to the present invention, the built-in inductor
There is no need to consider the distribution capacitance that occurs between
Group added between the inductor conductor and the inductor according to the invention
The capacitor formed between the land connection conductor
Originally provided between the connection point of the inductor and the ground
Connected in parallel to the original capacitor
Design as a combined capacitance with
The filter characteristics can be easily obtained.

[Brief description of the drawings]

FIG. 1A is a sectional view showing an embodiment of a laminated integrated component according to the present invention, and FIG. 1B is a circuit diagram thereof.

FIG. 2 is a manufacturing process diagram of the present embodiment.

FIG. 3A is a sectional view showing a conventional laminated integrated component,
(B) is a circuit diagram thereof, and (C) is an equivalent circuit diagram when this circuit is used at a high frequency.

[Explanation of symbols]

1 stacked integrated component 2 composite capacitor 3 complex inductor 4 dielectric 5,7 conductor 6 magnetic or dielectric 8, 11, 12, IN, conductor C ₁ -C ₅ connected to the OUT terminal electrodes 9 mounted electronic component 10 ground, C _S capacitor L ₁ , L ₂ inductor

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-7413 (JP, A) JP-A-3-86619 (JP, U) JP-A-6-17116 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A composite inductor comprising a plurality of inductors.
AndCapacitorAre combined by a laminated structure
Inductor andCapacitorAndTogetherSuperimposeLC file
Construct RutaMulti-layer LC composite parts or multi-layerLC
In a laminated integrated component in which an electronic component is mounted on a composite component, the plurality of inductors are located in different regions in the sintered body.
With helically formed conductors
And the inductors are connected to each other,The core is connected between a connection point between the inductors and ground.
Capacitor is connected,  Multiple layers of conductors connected to ground between each inductor
The conductor of each layer is paired with the inductor conductor on the same layer.
Formed to confrontBy doingThe conductor and the inductor
Between conductorsBetween the connection point of the inductor and ground
Connected in parallel with the capacitor connected toCapacitor
A laminated integrated component characterized by being formed.