JPS6127619A - Laminated capacitor - 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 composite multilayer capacitor.

Conventional technology Figure 1 shows a circuit diagram of a composite multilayer capacitor.

Terminal A of capacitor C1 is connected to the hot side, and the other terminal E is connected to ground. Terminal B of capacitor C2 is connected to the hot side, and the other terminal is connected to ground in common with C1. A third capacitor C is connected between terminals A and B.
3 has been inserted.

A conventional circuit that implements the above circuit configuration using a multilayer capacitor is shown in FIG.

FIG. 2 is a cross-sectional top view of the composite element. In Fig. 2, 1 is the base of the element made of dielectric material, 2 is the electrode layer which becomes the hot side of the capacitor C1, and 3 is the capacitor C1.
Both electrode layers are formed on the same surface by printing. An electrode layer 4 is formed on a part of the upper part of these electrode layers 2.3 through a dielectric layer, and a capacitor C1 is formed by the opposing parts of the electrode layers 1 and 4, and a capacitor C1 is formed by the opposing parts of the electrode layers 2 and 4. A capacitor C2 is formed, and one end of the electrode layer 4 is led out to the end surface of the element to form a terminal E. Note that one end of each of the electrode layers 2 and 3 is also led out to the element end face as a terminal A.

B is provided. A conductive paste or the like is suitable for these terminals A, B, and E. Further, on the same surface as the electrode layer 4, the electrode layer 2,
A common electrode layer 5 facing the remaining portion of the electrode 3 is formed. The opposing parts of the electrode layers 1 and 5 form a capacitor CI, and similarly the opposing parts of the electrode layer 2.6 form a capacitor C"3.
A capacitor is formed. In the above configuration, the third capacitor C3 inserted between the hot side terminals A and B is
Obtained as a series connection of the above C′3°CI, that is, C
'3. This was done by appropriately selecting the value of C5.

Problems to be Solved by the Invention However, in the conventional device, the third capacitor is obtained by connecting two capacitors in series, that is, the area of the electrode layer is large due to the necessity of manufacturing many capacitors. There was a problem that the shape of the element was large.0 The present invention solves the above-mentioned conventional problem, and when providing a third capacitor connected between the hot side terminals of two capacitors, the thickness of the element An object of the present invention is to provide a multilayer capacitor that can be made smaller in shape than conventional ones without increasing its size.

Means for Solving the Problems In order to solve the above problems, the multilayer capacitor of the present invention has a multilayer capacitor that integrally incorporates a plurality of capacitors, and the hot side electrodes of the first and second capacitors are connected to each other. layers are provided on the same surface, and the first layer is sandwiched between the insulating layers.
and the ground side electrode layer of the second capacitor is provided as a common electrode layer so as to cover part of the two hot side electrode layers, and the two hot side electrodes are provided on the same surface as the common electrode layer. a second common electrode layer extending over a remaining portion of the layer and connecting the second common electrode layer to the hot side electrode layer of the second capacitor; A third capacitor is formed by the opposing portion of the layer and the second common electrode layer.

Effects According to the present invention, the third capacitor can be formed by one opposing portion, and the device can be made smaller.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. 3 and 4 show an embodiment of the multilayer capacitor of the present invention, FIG. 4 is a front view, and FIG. 3 is a cross-sectional front view taken along the yr-yr' line. 1 is a base of the element made of dielectric material, 6 is an electrode layer that becomes the hot side of the capacitor C1, and 7 is an electrode layer that becomes the hot side of the capacitor C2. Both electrode layers 6.7 are formed by printing on the same surface.

An electrode layer 8 is formed on a part of the upper part of these electrode layers 6 and 7 through a dielectric layer, and a capacitor C4 is connected to the opposing part of the electrode layer 6°8, and a capacitor C4 is connected to the opposing part of the electrode layer 7°8. A capacitor C2 is formed. The electrode layers 6, 7.
One end of each of the terminals 8 is led out to the end face of the element by a wire, and connected to the terminal A.

Note that terminals A, B, and E are provided with conductive paste. A common electrode layer 9 facing the remaining portions of the electrode layers 6 and 7 is formed on the same surface as the twisted electrode layer 8, and one end of the common electrode layer 9 is led out to the end surface and connected to the terminal B. With this configuration, a capacitor C3 is formed at the opposing portion 9' of the electrode layers 6 and 9, that is, a third capacitor C3 is inserted between the hot side terminals A and B.

According to the above embodiment, since the third capacitor C3 can be formed by one opposing portion 9', the element can be made smaller by the portion indicated by the two-dot chain line 10 compared to the conventional element. Further, since the electrode layers 6, 7 and the electrode layers 8, 9 are formed on the same surface, there is an advantage that there is no increase in the number of steps.

Effects of the Invention As described above, according to the present invention, by connecting the electrode layer for the third capacitor to the - hot side electrode layer of the first or second capacitor, The third capacitor inserted between the hot side terminals of
The multilayer capacitor element can be formed in two opposing parts, thereby realizing miniaturization of the multilayer capacitor element.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of a multilayer capacitor, Fig. 2 is a cross-sectional top view of a multilayer capacitor with a conventional configuration, and Fig. 3 is taken along line M-M/ in Fig. 4 showing an embodiment of the multilayer capacitor of the present invention. The cross-sectional top view and FIG. 4 are the same front views. 1... Base, 6, 7, 8.9... Electrode layer, A. B, E...terminals. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
figure

Claims (1)

[Claims] In a multilayer capacitor that incorporates a plurality of capacitors, the hot-side electrode layers of the first and second capacitors are provided on the same surface, and the ground sides of the first and second capacitors are arranged with an insulating layer in between. An electrode layer is provided as a common electrode layer so as to cover part of the two hot side electrode layers, and on the same surface as the common electrode layer so as to cover the remaining part of the two hot side electrode layers. a second common electrode layer is provided, the second common electrode layer is connected to the hot side electrode layer of the second capacitor, and the hot side electrode layer of the first capacitor and the second common electrode are connected to each other. A multilayer capacitor characterized in that a third capacitor is formed by a portion facing the layer.