JPS62132309A - Lc complex component - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a capacitor in which capacitor polarization is formed on both sides of a dielectric substrate, and a coil conductor in a spiral shape (^ and zigzag shape) on the surface of the dielectric substrate. The present invention relates to an LC composite component including a printed coil to which is fixedly attached.

(Prior art) Conventionally, as shown in Fig. 3 (C), a capacitor is constructed on a dielectric substrate, and a separate coil is mounted on the dielectric substrate. There is.

In this LC composite component, 1^(, 1 is a dielectric substrate, 2 and 5 are capacitor electrodes, and capacitor polarization 2
is formed on one side of the dielectric substrate 1, and the capacitor electrode 6 is formed on the other side of the dielectric substrate 1 [14].

4 is an air-core coil having a pair of lead terminals 4a;
Apply solder or the like to one side of the dielectric substrate 1 (C mounted to C1
Eight.

5 is a conductor path formed on the dielectric substrate 1, and serves to electrically connect the capacitor electrode 2.6 and the air-core coil 4.

The LC composite component with can obtain a parallel circuit of a capacitor and a coil between the ends 5a and 5b of the conductor track 5.

In addition, conventionally, another LC composite part was used as °C1 Fig. 4 (A
) to (C), a spiral coil conductor is fixed to the surface of an insulator substrate to form a printed coil, and a separate capacitor is mounted on the other insulator substrate to form an LC composite component C. be.

In this LC composite part, 1^C16 is an insulator substrate.

7 is a plate-shaped capacitor having a pair of lead terminals 7a, which is mounted on one side of the insulating substrate 6 using solder or the like and attached to the CI.

8 (and 9 are spiral-shaped coil conductors; the coil conductor 8 is fixed to one side of the insulating substrate 6, and the coil conductor 9 is fixed to the other side of the insulating substrate 6. .10 is a through hole formed by cutting the insulator substrate 6,
The end of the coil conductor 8 and the end of the coil conductor 9 are electrically connected.

Reference numeral 11 denotes a conductor path formed on the insulating substrate B, which serves as a blank for electrically connecting the plate-shaped capacitor 7 and the coil conductors 8 and 9.

This LC composite component makes it possible to obtain a parallel circuit of a capacitor and a coil between the conductor tracks +1a and 11b. In addition,
Using a magnetic substrate or the like instead of the insulating substrate 61. −． (
It is also possible to form a similar LC composite component by using a zigzag shaped coil conductor instead of the spiral shaped coil conductor. must be implemented as a separate component.
For this reason, manufacturing was complicated and the cost was high.

To solve this problem, an LC composite component in which a capacitor and a printed coil are formed on a single dielectric substrate (C1) has been considered. Because it is difficult to put a printed coil into practical use by fixing a coil conductor onto the surface of C,
Composite parts have been put into practical use [(hena1^.

That is, the equivalent circuit of a printed coil in which a coil conductor is fixed to the surface of a substrate can be expressed as shown in FIG. 5 (7). This is because in the case of a printed coil in which the coil conductor is fixed to only one side of the board, there is stray capacitance Cp between the lines of the coil conductor, and in the case of a printed coil in which the coil conductor is fixed to one side and the other side of the board. In this case, stray capacitance cp occurs between the lines of the coil conductor and between the coil conductor fixed to one side and the coil conductor fixed to the other side. When an insulating substrate or a magnetic substrate is used as the substrate, the stray capacitance Cp is so small that it can be ignored, but when a dielectric substrate is used, the stray capacitance Cp naturally becomes very large. . Wave number f for self-resonance. Therefore, it is necessary to use a dielectric substrate.
Put it away. This printed coil does not function as a coil but as a capacitor at a frequency higher than the self-coupled 1st frequency (at 6 frequencies, it does not function as a coil, but as a capacitor). When the IO becomes low, the frequency characteristics deteriorate.

In other words, a printed coil in which a spiral-shaped I^ and zigzag-shaped coil conductor is fixed to the surface of a dielectric substrate has a large stray capacitance cp. -1 As a result, LC composite parts using a printed coil, in which a coil conductor is fixed to the surface of a substrate, have been put into practical use.

(Another means to solve the problem) The present invention provides a method for fixing a coil conductor to the surface of a dielectric substrate.
The aim is to commercialize LC composite parts using C printed coils.

As a means for achieving this, the LC composite component of the present invention has an insulating material interposed between a dielectric substrate and a spiral (zigzag) coil conductor.

As a result, when the coil conductor is fixed to only one side of the dielectric substrate and connected to C1, the coil conductor is fixed to C with an insulating material interposed and connected to CI, thereby entering between the lines of the C1 coil conductor. The stray capacitance Cp becomes smaller (below 1. Also, by fixing the coil conductor on one side and the other side of the dielectric substrate, C
1), the coil conductor is fixed with an insulating material interposed between the wires of the coil conductor, and between the conductor fixed on one side and the conductor fixed on the other side. The stray capacitance Cp between C1 and C1 becomes smaller. Therefore, the printed coil that constitutes a part of the LC composite component of the present invention has a small decrease in the self-empathy frequency 10, and
The frequency characteristics are improved to C1.

According to the present invention, a capacitor of at least 15 sides is formed with a capacitor voltage formed on both sides of a dielectric substrate, and a coil conductor having a spiral shape and a zigzag shape is fixed to the surface of the dielectric substrate. It becomes possible to put the LCiC into practical use by combining at least one set of printed coils.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

Figures 1A) to 1C) show an embodiment of the LC composite component of the present invention. However, FIG. 1(A) is a plan view, FIG. 1(B) is a side sectional view taken along the dashed line CC', and FIG. 1(C) is a bottom view of the id.

In this LC composite part, 18C112 is a dielectric substrate with a dielectric constant of 240 and a thickness of 0.4''. 13 and 1
Reference numeral 4 designates a capacitor electrode, in which a capacitor electrode 16 is formed on one surface of the dielectric substrate 12, and a capacitor electrode 14 is formed on the other surface of the dielectric substrate 12.

15 and 16 are insulating materials made of a glaze with a dielectric constant of 10, and the insulating material 15 is printed on one side of the dielectric substrate 12, and the insulating material 16 is printed on the other side of the dielectric substrate 12. It is formed by °C. 17 and 18 are spiral-shaped coil conductors, and the coil conductor 17
An insulating material 15 is interposed on one side of the dielectric substrate 12 and C is fixed thereto.

The coil conductor 18 is fixed to the other surface of the dielectric substrate 12 with an insulating material 16 interposed therebetween. A through hole 19 is formed through the dielectric substrate 12 and electrically connects the end of the coil conductor 17 and the end of the coil conductor 18.

A conductor path 20 is formed on the dielectric substrate 12 and serves to electrically connect the capacitor electrode 13 and the coil conductor 17, and the capacitor electrode 14 and the coil conductor 18. Note that the capacitor conductors 1i13.14, the coil conductors 17.18, and the conductor paths 19 are made of the same material (8. The dielectric substrate 12 is made of the same material by printing, vapor deposition, etc.).
It is possible to form

This LC composite component includes ends 20a and 20b of the conductor path 20.
In between, a parallel circuit of capacitor and coil can be obtained.

The printed coil that forms part of this LC composite part is
The coil conductors 17 and 18 are fixed to the dielectric substrate 12 with insulating materials 41, 5 and 16 interposed between them. The stray capacitance Cp between 17 and 18 is small. Therefore, the decrease in the self-resonant frequency 10 is small, and sufficiently practical frequency characteristics can be obtained.

The above is one embodiment of the LC composite part of the present invention, and it goes without saying that design changes may be made within the scope without departing from the spirit of the present invention. For example, the number of capacitors and coils formed on the dielectric substrate 12 and the manner of connection thereto are arbitrary. Further, the shape of the coil conductors 17 and 18 is also arbitrary, and in addition to the square spiral shape as in the above embodiment, a circular spiral shape, a zigzag shape, etc. can also be adopted. Further, other components such as a resistor may be partially mounted on the dielectric substrate 12.

Furthermore, the DC composite component of the above embodiment has a dielectric substrate 12
The coil conductors 17 and 18 are fixed to both sides of the (tQ), but it is also possible to fix the coil conductors to only one side (C). That is, as shown in Fig. 2 (A) to (C), An insulating material 15' is applied only to one surface of the dielectric substrate 12.
By interposing the C coil conductor 17' and fixing the C coil conductor 17', and further electrically connecting the coil conductor 17' and the capacitor electric image 13 through the conductor path 20', the end 17a1 of the coil conductor 171 and the capacitor electrode are connected. 14, a series circuit of a capacitor and a coil can be obtained. This LC composite component has a C coil conductor 171 with an insulating material 15' interposed.
is fixed to one surface of the dielectric substrate 12 (18),
The stray g-icp that enters between the lines of the coil conductor 17' is small 1
^.

Therefore, the decrease in the C1C1 self-coherence number of 1 degree is small, and a sufficiently practical frequency characteristic can be obtained.

(Effects of the Invention) As is clear from the above description, the LC composite component of the present invention has an insulating material interposed on the surface of a dielectric substrate.
This is a structure in which a conductor is fixed. As a result, in the printed coil that constitutes a part of the LC composite component of the present invention, the self-resonant frequency fO is prevented from becoming low, and the frequency characteristics are improved (1/-).

According to the present invention, at least one set of capacitors having capacitor currents formed on both sides of a dielectric substrate and a coil having a spiral shape and a zigzag shape are formed on the surface of the dielectric substrate. It becomes possible to put into practical use an LC composite component comprising at least one set of printed coils to which a conductor is fixed.

The LC composite component of the present invention, in which a capacitor and a printed I/coil are formed on a dielectric substrate, eliminates the need for the capacitor and the coil as a separate component as in the conventional case. Since the same material can be used for the coil conductor and the dielectric substrate at the same time, manufacturing is easy and costs can be significantly reduced (IQ).

[Brief explanation of drawings]

FIG. 1(A) is a plan view showing an embodiment of the LC composite part of the present invention, FIG. 1(B) is a side sectional view taken along the chain line C-Cl of ε, and FIG. 1(C) is the bottom surface thereof. Fig. 2 (Chrysanthemum is a plan view showing another embodiment of the IJC composite part of the present invention, Fig. 2 (B)
) is a side sectional view of the chain #D-D' part, Figure 2 (C) is its bottom view, Figure 3 (the glue is a plan view showing a conventional LC composite part, Figure 6 CB) is its chain line. 6(C) is a bottom view thereof, FIG. 4(A) is a diameter view, and FIG. 5 is an equivalent circuit diagram of the printed coil.

Claims (1)

[Scope of Claims] At least one set of capacitors each having capacitor electrodes formed at opposing positions on one side and the other side of a dielectric substrate, and a coil conductor having a spiral or zigzag shape on the surface of the dielectric substrate. 1. An LC composite component comprising: at least one set of printed coils having a printed coil fixed thereto, characterized in that an insulating material is interposed between a dielectric substrate and a coil conductor.