JPS5927049Y2 - CR composite parts - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvements in CR composite parts used for antenna coupling, line bypass, across-the-line, etc.

Conventionally, as this type of composite parts, those shown in FIGS. 1 to 3 have been devised.

What is shown in FIG. 1 includes semicircular divided electrodes 2a, 2b on one plane of a disc-shaped dielectric substrate 1, and these divided electrodes 2a, 2b.
A circular resistor 3a formed by applying a resistive paint is provided so as to bridge between them, and the pair of electrodes 2a are provided on the ground plane.
, 2b are provided, and lead wires 5a and 5b are connected to each of the divided electrodes 2a and 2b by solder 6, and the entire or part of the outer peripheral surface thereof is insulated. An exterior 7 is provided.

The one shown in FIG. 2 uses a rectangular plate-like dielectric substrate 1, and there is no difference in content from the one shown in FIG. 1, so a detailed explanation will be omitted.

In the one shown in FIG. 3, on one plane of the square plate-shaped dielectric substrate 1,
Three divided electrodes 2a, 2b, 2C are provided which are bridged by resistors 3a, 3b, and are opposed to each other so as to straddle the divided electrodes 2a, 2C and 2C, 2b, respectively, on the horizontal plane. Two opposing electrodes 4a, 4b are provided, lead wires 5a, 5b are connected to both ends 2a, 2b of the split electrodes by solder 6, and an insulating sheath 7 is provided on the entire or part of the outer peripheral surface. It is something.

However, for these CR composite parts, discharge tests such as UL standards and CAS standards (3KVA, C, applied for 1 minute)
If this is done, there is a drawback that the rate of change in resistance becomes large, and also there is a drawback that a very high withstand voltage characteristic cannot be obtained.

Examining the CR composite component after performing a discharge test and withstand voltage measurement, it is found that the discharge occurs mainly in the resistor 3a and 3b portions that are bridged between the divided electrodes. .

This is because the dielectric substrate 1 and the insulating sheath 7 located between the divided electrodes 2a, 2b, and 2C have relatively good adhesion and have a high degree of insulation, whereas the insulation between the resistors 3a and 3b is This is thought to be because the adhesion with the exterior 7 is not so good, and fine voids are generated in that part.

In other words, this is probably because the surface of the dielectric substrate 1 is relatively rough, whereas the surfaces of the resistors 3 a and 3 b are almost smooth.

In addition, in these devices, the resistors 3 a and 3 b bridging between the divided electrodes 2 a, 2 b, and 2 C are provided at the shortest distance, so in order to obtain a desired resistance value,
A material with a high resistance value per unit area must be used, and it has the disadvantage that it is difficult to obtain a material with stable quality.

The present invention was developed in view of the above-mentioned drawbacks, and the present invention has been developed by using a resistor provided to bridge between the divided electrodes.
The split electrodes are provided at the shortest distance so that they are not bridged, and the insulating sheath is always directly adhered to one of the substrate surfaces between the shortest opposing ends of each split electrode. The aim is to provide CR composite parts that

Embodiments of the present invention will be described in detail below with reference to the drawings.

4 to 6 show the present invention corresponding to the conventional example shown in FIGS. 1 to 3, respectively.

Furthermore, since the components shown in FIGS. 4 to 6 are essentially the same as those shown in FIGS. 1 to 3, the following explanation will be given only to the different parts.

Further, explanations of overlapping parts in each figure will be omitted.

The resistor 13a in FIG. 4 extends over the surface of the substrate 1 between the surface-divided electrodes so that one end thereof is connected to the upper part of one of the divided electrodes 2a, and the other end is connected to the lower part of the other divided electrode 2b. It is installed at an angle.

That is, by providing the resistor 13a in this way,
In each of the shortest distance parts of the regions where the surface-divided electrodes 2a and 2b face each other, there is always a substrate surface on which the resistor 13a is not provided, that is, for example, in the shortest distance part in the figure, as shown in FIG. As well shown, dl and d2
This means that there are two substrate surfaces.

Therefore, the surface-divided electrodes 2a and 2b face each other via a portion with good adhesion and high insulation.

Note that if the resistor 13a in FIG. 4 is simply provided obliquely, a minute discharge may occur in the vicinity of the connection with the divided electrodes 2a and 2b. As shown in the figure, as much as possible, resistor 13
It is preferable to bend a to make it perpendicular to the divided electrodes 2a and 2b.

In FIG. 6, the resistors 13 a and 13 b are provided in a curved manner.

With this configuration, in the present invention, the discharge between the divided electrodes is not carried out along the resistor, but is carried out through the insulating exterior, and the withstand voltage characteristics can be greatly improved. .

For example, it has been confirmed that when a destructive test is carried out on the one shown in FIG. 1 and the one shown in FIG. 4 under the same conditions, there is an improvement of about 50% in A and C.

Furthermore, the rate of change in resistance after a discharge test of <10 KV has also been reduced based on the UL standard and C8A standard.

Furthermore, in this invention, since the length of the resistor is substantially longer, it is possible to use materials with a low resistance value per unit area, and products with stable quality can be obtained, making it extremely practical. This is an expensive idea.

It goes without saying that various design changes may be made to the present invention in addition to those described above in view of its purpose and effects, and the above-mentioned design should be understood as just one embodiment of the present invention.

For example, the shape of the dielectric substrate, the shape and number of divided electrodes, etc. are arbitrary, and the shape of the resistor is also important so that there is always an insulating sheath between the divided electrodes, and that there is no bridging at the shortest distance. Any device may be used as long as it is provided in such a manner.

Furthermore, if the shape of the counter electrode provided on the other side of the substrate so as to straddle the divided electrodes is such that it does not face the resistor as much as possible, for example, as shown in FIG. concentration can be alleviated, and the withstand voltage characteristics can be further improved.

In the case of FIG. 8, the resistor 13a and the counter electrode 4a
Since the connecting portion 4a' can be configured to have an opposite electric field, electric field concentration can be further alleviated.

Furthermore, the present invention can be applied not only to simple CR composite parts, but also to CR composite parts with discharge gaps in which a discharge electrode is integrally formed in a part of each divided electrode.

[Brief explanation of the drawing]

FIGS. 1 to 3 are front and back plan views showing conventional CR composite parts, FIGS. 4 to 6 are front and back plan views showing examples of the shape of the CR composite part of the present invention, and FIG. FIG. 4 is a sectional view taken along line A--A, and FIG. 8 is a back view showing still another embodiment of the present invention. 1-dielectric substrate, 2a, 2b, 2C-divided electrode, 4-counter electrode, 5a, 5b-lead wire, 7-insulating exterior, 13a
, 13b-resistor.

Claims (1)

[Claims for Utility Model Registration] Split electrodes provided on one plane of a dielectric substrate and facing each other at a constant interval, and a split electrode provided to bridge the opposing split electrodes. a resistor, a counter electrode provided on a horizontal plane of the substrate so as to straddle the opposing divided electrodes, a lead wire connected to the divided electrodes, and a lead wire covering the substrate. In a CR composite component comprising an insulating exterior provided to A CR composite part characterized by: