JPS6127617A - 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] Industrial applications The present invention provides a product i- It concerns layer capacitors.

Conventional technology For example, in superhetero gain, when mutual coupling occurs between the receiver's antenna tuning circuit and local oscillation circuit, if their frequencies are close, a pull-in phenomenon occurs and the oscillation voltage is unnecessary via the antenna circuit. This had the disadvantage of being radiated to the outside and causing interference. For this reason, in the past, the circuits described above were placed apart from each other by physical space, or one circuit was covered with a shield plate to avoid coupling with each other, but such a configuration made it difficult to downsize. There was a limit. On the other hand, as a means of downsizing circuits, it is common practice to use composite components. For example, in the case of a multilayer capacitor, if a plurality of capacitors have the same capacitance value, the plate areas are approximately the same, so it is possible to manufacture them as an integral structure.

Problems to be Solved by the Invention However, if the capacitors connected to each of the above circuits are integrated, circuit amount coupling will inevitably occur.
Due to miniaturization, it was not possible to use a composite multilayer capacitor.

An object of the present invention is to minimize coupling capacitance between capacitors to suppress coupling between different circuits to which each capacitor is connected.

Means for Solving the Problems In order to solve the above problems, the multilayer capacitor of the present invention is a multilayer capacitor in which a plurality of capacitors are integrated, and the electrode layer on the hot side of one capacitor is connected to the electrode layer on the hot side of the other capacitor. This is characterized in that the electrode layer on the earth side is printed on the same surface as the electrode layer on the ground side.

According to the present invention, with the above-described configuration, it is possible to realize a multilayer capacitor that has a mutual shielding effect and reduces mutual coupling capacitance.

EXAMPLES Hereinafter, examples of the present invention will be described based on the drawings. 1st
The figure is a circuit diagram of this embodiment, and terminals A and D of capacitors C1 and C2 are on the hot side, and terminal B is on the hot side.

E is connected to the ground side. FIG. 2 is a front view of this embodiment, and FIG. 3 is a cross-sectional top view taken along line MM' in FIG. 1 is a dielectric layer, 2x and 3x are electrode layers, 4 is a dielectric layer, 2V + 3 y is an electrode layer, and 6 is a dielectric layer, which are sequentially formed by printing.

A portion of each of the electrode layers is led out to the end face, and a terminal is formed by providing a conductor in this portion. Then, the capacitor C1 is placed on the electrode layers 2x and 2y, and the electrode layer 3x
, 3y form a capacitor C2.

In the above embodiment, the terminals A and E are connected to the electrode layers 2x and 3χ on the same surface, respectively. Here, as shown in FIG. 1, terminal A is connected to the hot side, and terminal E is connected to the ground side. Also, the electrode layer 2y on the other side
, 3y are connected to the ground connection terminal B and the hot connection terminal B, respectively.

According to the above configuration, even if a large dielectric material is used, in order for the electrode layers 2Vr3x connected to the ground side to have a shielding effect from each other, The coupling capacitance is extremely small, making it possible to suppress coupling between circuits of different systems to which the terminals A and D are respectively connected.

In addition, as shown in the figure, the electrode layer 2y connected to the ground side
, 3x is larger than the other electrode layers 2x, , 3y, the coupling capacitance between terminals A and D can be further reduced, and errors in positional accuracy in the printing process can be absorbed. Therefore, variations in capacitance can be reduced.

Effects of the Invention As described above, according to the multilayer capacitor of the present invention, the hot-side electrode layer of one capacitor and the ground-side electrode layer of the other capacitor are printed and formed on the same surface, so that they can be easily connected to each other. This makes it possible to reduce the coupling capacitance between capacitors and suppress coupling between different circuits to which each capacitor is connected, which greatly contributes to miniaturizing these circuits.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of a multilayer capacitor of the present invention,
FIG. 2 is a front view of this embodiment, and FIG. 3 is a cross-sectional top view taken along line MM' in FIG. 1...Dielectric layer, 2! , 27, 3x
, 3 y... river/electrode layer, 4, 5... dielectric layer, A, B, C, D... terminal. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure A f) 21st!1 3rd WJ

Claims (1)

[Claims] A multilayer capacitor that integrates a plurality of capacitors, characterized in that a hot side electrode layer of one capacitor and a ground side electrode layer of the other capacitor are printed on the same surface.