JPH03165019A - Composite-type ceramic capacitor - Google Patents

Abstract

PURPOSE:To prevent noises at high frequencies by using both tip parts of each of three lead wires which are soldered to three electrodes formed on both surfaces of a dielectric substrate as terminals, and providing six terminals. CONSTITUTION:Two electrodes 12 and 13 are juxtaposed on one surface of a dielectric substrate 11 so that the electrodes are separated to each other. One electrode 14 is provided on the surface facing the electrodes 12 and 13. Three electrodes 12, 13 and 14 are formed in this way. Lead wires are horizontally soldered to the surfaces of the electrodes 12, 13 and 14, respectively. Both tips of each of the lead wires 15, 16 and 17 are made to extend from the end part of the dielectric substrate 11, and six terminals of (a), (b), (c), (d), (e), and (f) are formed. Therefore, three lead wires 15, 16 and 17 are operated as the three lines of two power-source lines and one grounding line. This pattern is equal to the pattern wherein the electrodes are directly connected to the lines. Therefore, the increase in impedance due to the skin effects of the lead wires 15, 16 and 17 is avoided, and the noise preventing effect high frequencies can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a composite ceramic capacitor for line bypass used in a line fill section in a power supply circuit.

2. Prior Art Conventionally, this type of ceramic capacitor is shown in FIG.
, The configuration was as shown in (b). That is, Fig. 5 (
In al. (b), 51 is a dielectric substrate, and two electrodes 52 are provided on one side of the substrate and spaced apart from each other.
One electrode 53 is provided on the other surface so as to face this. Three lead wires 54 led out from the three electrodes 52, 52, 53, respectively, extend in one direction to constitute three terminals.

Figure 4 shows the circuit diagram of the composite ceramic capacitor constructed as described above.
The symbols d, e, and f correspond to those in FIG.

Problems to be Solved by the Invention In such a conventional configuration, the lead wire 54 is
There was a problem that the skin effect occurred and the noise prevention effect was lost due to the increase in impedance.

The present invention solves these problems and aims to prevent noise at high frequencies.

Means for Solving the Problems In order to solve this problem, the present invention provides three electrodes each soldered to three electrodes formed on both sides of a dielectric substrate.
Six terminals are provided, with both ends of each of the two lead wires serving as terminals.

Function: With this configuration, the skin effect that occurs between the lead wires is equivalent to the case where the electrodes are directly connected to the power supply line.
Skin effect no longer occurs. This eliminates impedance increase at high frequencies and improves the noise prevention effect.

Example (Example N1) FIGS. 1(a) and 1(b) are perspective views of a composite ceramic capacitor according to a first example of the present invention.
In al, (bl, 11 is a dielectric substrate, and two electrodes 12.13 are provided on one surface of this dielectric substrate 11 and arranged in parallel at a distance from each other, and a surface facing this electrode 12.13 is provided. A lead wire 1 is connected to each of the three electrodes 12.
5, 16, and 17 are horizontally soldered to the electrode surface. Both ends of each lead wire 15, 16, 17 protrude from the end of the dielectric substrate 11, a and b.

It is configured to form six terminals c, d, e, and f.

In the composite ceramic capacitor configured as described above, the three lead wires 15, 16, and 17 function as three lines, two power lines and one ground line, and the electrodes are directly attached to the lines. It will be the same thing. Therefore, the impedance increase due to the skin effect of the lead wires 15, 16, 17 is eliminated, and the noise prevention effect at high frequencies can be improved.

(Example 2) Fig. 2 tal and (bl are perspective views of a composite ceramic capacitor according to a second embodiment of the present invention, and Fig. 2
1, (in bl, 21 is a dielectric substrate, and 2 parallel to each other are spaced apart from each other on one surface of this dielectric substrate 21.
Lead wires 25 are connected to each of the three electrodes 22, 23° 24, which are configured by providing two electrodes 22, 23 and one electrode 24 on the surface facing the electrodes 22, 23.
, 26 and 27 are horizontally soldered to the electrode surface. The tips of the respective lead wires 25, 26, and 27 are bent at one end of the dielectric substrate 21 so that they all come out in the same direction, and are brought to one opposing surface. Then, it is stretched horizontally to the surface and parallel to the lead wires on the opposing surface to form six terminals in one direction.

The composite ceramic capacitor configured as described above improves the noise prevention effect at high frequencies as in the first embodiment, and also improves the mounting area because it can be mounted perpendicular to the printed circuit board surface. It turns out.

Effects of the Invention As described above, according to the present invention, by using both ends of the lead wire as terminals to form six terminals, the increase in impedance at high frequencies can be eliminated in the same way as when directly attaching the electrode surface. In addition, the effect of improving frequency characteristics can be obtained.

[Brief explanation of the drawing]

1(al) and (b) are perspective views of a composite ceramic capacitor according to a first embodiment of the present invention, and FIG. 2(a) is a perspective view of a composite ceramic capacitor according to a second embodiment of the present invention. FIG. 3 is an equivalent circuit diagram of a composite ceramic capacitor of the present invention, FIG. 4 is an equivalent circuit diagram of a conventional composite ceramic capacitor, and FIGS. 5(a) and (b)
1 is a top view and a bottom view of the main parts of a conventional composite ceramic capacitor. 11.21...Dielectric substrate, 12.13, 14
゜22, 23.24... Electrode, 15.16.1
7゜25.26.27...Lead wire.

Claims (3)

[Claims] (1) Two electrodes are arranged in parallel and spaced from each other on one surface of the dielectric substrate, and one electrode is provided on the other surface of the dielectric substrate so as to face the two electrodes,
Both tips of the three lead wires soldered to the three electrodes serve as terminals, and the composite ceramic capacitor has six terminals. (2) The tips of the three lead wires soldered horizontally and parallel to the three electrode surfaces protrude from the upper and lower ends of the dielectric substrate, forming six terminals. A composite ceramic capacitor according to claim (1). (3) The tips of the three lead wires soldered horizontally and parallel to the three electrode surfaces are bent at one end of the dielectric substrate, and the other surface facing the electrode surface is bent at one end of the dielectric substrate. Claim (1), wherein the lead wire extends horizontally in parallel to the lead wire soldered to the electrode surface, and six terminals are formed in one direction.
Composite ceramic capacitor as described.