JPS5961915A - Laminated condenser - 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 so-called multilayer capacitor in which a hard layer and a dielectric layer are sequentially laminated in multiple layers.

Conventional +1♂1 configuration and its problems Multilayer capacitors in which an electropupil layer and a dielectric layer are sequentially laminated in multiple layers are generally known, but in all of these types of capacitors, the dielectric material in each layer is the same. If the electrode layers are the same, the electrostatic field 111 between each electrode layer is the same. Therefore, when trying to obtain a large number of capacitor elements with different capacitances with this kind of capacitor, it is necessary to laminate a number of electrode layers and dielectric layers according to the capacitance of each capacitor element. There was a problem in that the number of layers increased significantly overall.

Of course, it is possible to obtain capacitor elements with different capacitances by changing the size of the electrode layer formed in each layer, but in this case, the size of the electrode layer must be changed for each layer. However, it is not very desirable, as it is troublesome to manufacture, and a large number of unnecessary dielectric layers are formed in certain parts of the plate layer.

OBJECTS OF THE INVENTION The present invention eliminates the following two drawbacks of the conventional technology and provides an excellent multilayer capacitor with a simple structure.

Structure of the Invention The present invention is structured so that the dielectric constant of the dielectric layer is successively changed so that a large number of capacitor elements having different capacitances can be formed in an electrode layer of the same size.

The explanatory diagram of the embodiment is a cross section (Itl1) of one embodiment of the multilayer capacitor of the present invention.
1a, 1b, 1c in the figure are titanium oxide (TiO2) and halium titanate J.
(BaTiOs) 100:0.90, 110.80, 12Q...Dielectrics 1・Δ, 2a with different permittivity were formed by sequentially changing the mixing ratio in this manner.
2b.

2C・Barespectively” double dielectric layer 1? L, 1b, 1c・
...The voltage layer provided in between ('1v layer).

Note that in the 1-1 layer stacked capacitor, each dielectric layer 1a,
1 b.

Each set (・91 layer 2
a.

2b, 2C... are formed, and these are (1′1・J・′
After that, it is made by firing.

-1- In the embodiment described above, each dielectric body layer 1a, 1b.

1C..., Jl, is formed by a mixture of titanium oxide and barium titanate, but since the mixing ratio or force is different, each set J'fyjJdj2 a,
2b, 2C... each electrode layer 2a even if the size is the same.

2b, 2C, . . . can be used to create capacitor elements with different electrostatic fields (C), and has the advantage that a large number of capacitor elements with different electrostatic fields (1) can be easily obtained.

Dielectric materials d having different dielectric constants generally have different heat absorption profiles 1+ during firing, and therefore have different dielectric constants. The electrical shield layers 1a, 1b, 1G, etc. are made of completely different dielectric materials (14). , 1c...
...Cracks and warpage occur between them, causing fatal defects as a dielectric layer capacitor. However, according to the recording example, the dielectric layers 1a, 1b, and 1c, each having a different amount of contaminant charge, are all oxidized. It is made of a 21♀ compound of titanium and barium titanate, and the mixing ratio is sequential (・'1'' dika by h''11
Since it is only 11" [adjacent dielectric layer 1a.

1b, IC... The heat absorption sheath/i rate between J4' and the potato is only 1/'1°, and the 5C layers 1a, 1b, 1c
...It has the advantage of almost no cracking or warping between the edges.

In addition, in the example, dielectric materials) j-71a, 1b, 10...
* is formed from a mixture of titanium oxide and barium titanate, but a mixture of other dielectrics A:A'Fl may also be used.

Light 1su]〉ノJ Song duds 1ν+ 11:1. +Record Mli, as is clear from the example, each invitation? The 1117i IC is made by forming a mixture of a plurality of electric shields having different dielectric constants, and changing the mixing ratio sequentially, and the size of the electrode layer. Even if they are the same, it is possible to change the electrostatic capacitance between the layers. It is extremely advantageous in practical use as it can minimize the number of doors.

4. The 17th and 11th light figures in the drawings are 11th and 11th river surface views of one embodiment of the t'Ji I.

1a, 1b, 1cm dielectric layer, 2a, 2b.

2 C-Ikden k (/i゛i', t.

Name of representative: Toshio Nakao and 1 other person (Patent Attorney) b 2a

Claims (1)

[Claims] The dielectric layer interposed between the electrode layer and the electrode layer is formed from a mixture of a plurality of dielectric materials having different dielectric constants, and the mixing ratio of the two dielectric materials is adjusted between adjacent dielectric layers. so that they are different sequentially! 11i multilayer capacitor.