JPS595963Y2 - CR composite parts with discharge gap - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a CR composite component with a discharge gap.

For example, CR composite parts with discharge gaps are used as antenna force pullers to remove induced lightning in antennas, or for across-the-line applications in power supplies.

Conventionally, such a CR composite component with a discharge gap is constructed as shown in FIGS. 1 and 2, for example.

In the figure, 1 is a dielectric substrate such as a ceramic substrate, and 2A is a dielectric substrate such as a ceramic substrate.
, 2B and 2C are conductive electrodes forming a capacitive element, such as silver electrodes, which are respectively adhered to the front and back surfaces of the ceramic substrate 1. 3 is a resistor formed by printing between the silver electrodes 2A and 2B, and 4A and 4B. are silver electrodes 2A and 2B
The leads 6A and 6B connected by e.g. solder to the silver electrodes 2A and 2B forming a discharge gap 7
The protrusion 8 indicates the mold.

As is clear from the figure, the resistor 3 of the conventional CR composite component with a discharge gap is directly formed on the dielectric substrate 1 by, for example, printing, so the resistor material had to be limited to carbon resin resistors.

Carbon resin resistors have a poor temperature coefficient, and because they cannot be trimmed or otherwise adjusted for resistance, they have poor accuracy and lack reliability.

Further, since the molding 8 is carried out excluding the discharge gap portion, it is susceptible to the influence of moisture, and furthermore, the exposure of the discharge gap poses a safety problem.

Note that FIG. 3 is an equivalent circuit diagram of the CR composite component with a discharge gap shown in FIGS. 1 and 2.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and includes a conductor electrode having a protrusion that forms a discharge gap on at least one surface of a dielectric substrate, and a conductive electrode having a protrusion that forms a discharge gap. disposing and connecting a chip resistor between the conductor electrodes so as to cover a discharge gap between the conductor electrodes;
The present invention provides a CR composite component with a discharge gap in which a mold is formed so as to cover the entire dielectric substrate.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 4 to 6.

Note that portions corresponding to those shown in FIGS. 1 and 2 are given the same reference numerals for convenience of explanation.

As illustrated in FIGS. 4 and 5, in the present invention, a discharge gap 7 is formed between a pair of conductor electrodes 2A and 2B attached to one surface of the dielectric substrate 1, in the illustrated example, the surface. The protrusions 6A and 6B are formed approximately at the center of the conductor electrodes 2A and 2B, and the chip resistor 9 is connected to the conductor electrodes 2A and 2 so as to cover the protrusions 6A and 6B and the discharge gap 7 formed by them. B, and connected thereto by, for example, solder 10.

FIG. 6 shows an example of a chip resistor 9 used in the present invention.

In the figure, reference numeral 11 indicates a ceramic substrate, and a pair of electrodes 12 are arranged at opposite ends of the ceramic substrate 110.
A resistor 13 is formed between these electrodes by, for example, screen printing.
In this example, lead ruthenate is deposited, and a side electrode 14 is formed by extending the electrode 12 over the side surface of the ceramic substrate 11.

These side electrodes 14 are connected to the conductor electrodes 2A, 2B by solder 10 as described above.

As described above, since the chip resistor 9 is used as the resistor in the present invention, there is no need to use a carbon range resistor as the resistor 13 as in the conventional example, and a resistor material with good temperature characteristics and precision can be used.

Further, since it is extremely easy to trim the resistor in the portion 15 surrounded by the dotted line in FIG. 6, for example, a precise resistance value can be obtained.

Furthermore, since the discharge gap 7 is covered by the upper chip resistor 9, even if the mold 8 is formed to cover the entire dielectric substrate as shown in FIGS. No molding material enters the void area.

Therefore, the operation of the discharge gap 7 is not affected at all.

Since the discharge gap 7 is not exposed in this way, there is no danger at all, safety is improved, and operation is stable.

Further, while the entire part can be molded, there are advantages such as improved moisture resistance, stable characteristics, and increased reliability.

The above embodiment is merely an example of a CR composite part with a discharge gap corresponding to the equivalent circuit shown in FIG. 3, and therefore the structure, shape, etc. of the composite part can be changed in various ways as necessary. It is something.

As described above, according to the present invention, it is possible to provide a high-precision CR composite component with a discharge gap that has stable characteristics and is free from danger. Its effectiveness is remarkable when used for commercial purposes, lightning protection parts, and surge absorbers.

[Brief explanation of drawings]

Figure 1 is a front view showing an example of a conventional CR composite part with a discharge gap, Figure 2 is a top view of Figure 1 showing a cross section of the mold, and Figure 3 is a composite part shown in Figures 1 and 2. The equivalent circuit diagram of the component, FIG. 4 is a front view showing an embodiment of the CR composite component with a discharge gap according to the present invention, FIG. 5 is a top view of FIG. 4 showing the mold in cross section, and FIG. FIG. 2 is an enlarged perspective view showing an example of a chip resistor used in the invention. 1: dielectric substrate, 2A, 2B, 2C: conductor electrode, 3: resistor, 4A, 4B: lead wire, 6A, 6B: protrusion of conductor electrode, 7: discharge gap, 8: mold, 9: chip resistor.

Claims (1)

[Scope of utility model registration request] A conductor electrode having a protrusion forming a discharge gap is adhered to at least one surface of a dielectric substrate, and a chip resistor is placed between the conductor electrodes so as to cover the protrusion and the discharge gap formed by the protrusion. A CR composite component with a discharge gap, which is arranged and electrically connected to the dielectric substrate, and is formed by forming a mold so as to cover the entire dielectric substrate.