JPS6320105Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multilayer ceramic capacitor, and particularly to a multilayer ceramic capacitor that has a plurality of capacitances and allows the capacitance to be selected depending on how external electrodes are connected.

Conventional multilayer ceramic capacitors are generally shown in FIGS. 6 and 7, for example. That is, it has a structure in which internal electrodes 2 and 3 are provided inside the dielectric ceramic 1 and are opposed to each other via the dielectric ceramic 1, and external electrodes 4 and 5 are conductively connected to the lead-out portions of the internal electrodes 2 and 3. , its electrical equivalent circuit is shown in FIG. In such a configuration, the capacitance of one multilayer ceramic capacitor is determined by the number of internal electrodes in the multilayer printing process.
Therefore, only one fixed capacitance could be obtained in one multilayer ceramic capacitor.

The purpose of the present invention is to eliminate the drawbacks of conventional fixed-type multilayer ceramic capacitors, and to provide a multilayer ceramic capacitor that has multiple capacitances and allows the capacitance to be selected depending on how the external electrodes are connected. do.

For this reason, the present invention provides a plurality of mutually symmetrical or asymmetric internal electrodes in the same plane of dielectric ceramic, connects them to each external electrode, and connects the internal electrodes to another internal electrode facing each other through the dielectric ceramic. A multilayer ceramic capacitor is provided in which an electrode is provided and the electrode is connected to an external electrode different from the external electrode.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Reference numeral 11 is dielectric ceramic;
Reference characters b denote mutually symmetrical or asymmetrical internal electrodes located within the same plane of the dielectric ceramic 11, and are provided in pairs vertically at intervals. Reference numeral 13 denotes another internal electrode provided at a position facing the internal electrodes 12a, 12b via the dielectric 11, and between the upper and lower internal electrodes 12a, 12a and 12b, 12b.
It is located in between. That is, the internal electrodes 12a and 12b are formed by printing on the dielectric ceramic 11, the dielectric ceramic 11 is provided thereon and the internal electrodes 13 are formed by printing, and the dielectric ceramic 11 is further provided and the internal electrodes 1 are formed by printing.
2a and 12b are formed by printing, and the dielectric ceramic 11 is formed thereon. 14 and 15 are external electrodes connected to the internal electrodes 12a and 12b, respectively; 16 and 1
7 is an external electrode connected to the internal electrode 13.

With such a configuration, an electrical equivalent circuit as shown in Figure 3 is obtained, and multiple capacitances can be obtained in the same capacitor, and any capacitance can be selected depending on how the external electrodes are connected. can do.

4 and 5 show other embodiments,
In Fig. 4, the internal electrode 13 is divided into two mutually independent internal electrodes 13a and 13b, and the external electrodes are also divided into 16a, 16b and 17a, 17b, while in Fig. 5, the internal electrode 13 is divided into a plurality of internal electrodes 13c, 13d, and 13e so as to face the internal electrode 12a or 12b as appropriate, and each is provided with external electrodes 18, 19, and 20. In this way, the present invention is not limited to the illustrated embodiment, and various modifications are possible.

According to the multilayer ceramic capacitor of the present invention,
As is clear from the above explanation, a plurality of mutually symmetrical or asymmetrical internal electrodes are provided on the same surface of the dielectric ceramic, and another internal electrode is opposed to this internal electrode via the dielectric ceramic. , a capacitor with a plurality of capacitances can be obtained, and any capacitance can be selected depending on how the external electrodes are connected.

[Brief explanation of drawings]

FIG. 1 is a plan view of one embodiment of the present invention, FIG. 2 is a longitudinal sectional side view of the same, FIG. 3 is an electrical equivalent circuit diagram of the same, and plan views of other embodiments of FIGS. 4 and 5. FIG. 6 is a longitudinal sectional front view of the conventional example, FIG. 7 is a plan view thereof, and FIG. 8 is an electrical equivalent circuit diagram. 11 is dielectric ceramic, 12a, 12b are internal electrodes, 13, 13a, 13b, 13c, 13d, 1
3e is another internal electrode, 14, 15, 16, 16
a, 16b, 17, 17a, 17b, 18, 1
9 and 20 are external electrodes.

Claims (1)

[Scope of utility model registration request] A plurality of mutually symmetrical or asymmetric internal electrodes are provided in the same plane of dielectric ceramic and connected to each external electrode, and another internal electrode is provided opposite to this internal electrode via dielectric ceramic to connect this internal electrode. A multilayer ceramic capacitor connected to an external electrode different from the external electrode.