JPS6312120A - Manufacture of laminated ceramic 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] This article is about ceramic capacitors with no capacitors, especially damage caused by connections during mounting. This invention relates to a method for manufacturing a structure that improves JJ friendliness.

The multi-layer ceramic capacitors are shown in the perspective view of Figure 1 and the partially enlarged sectional view of Figure 2. land 2
It was mounted on top by soldering. This 41
In some cases, the width of the 1-device land 2 is wider than the width of the outer s1E pole 4 of the multilayer ceramic capacitor 3, but in general, it is necessary to maintain a certain distance between it and other adjacent components, and the width is limited. Outside S as shown in the second worst due to the problem of actual iron space.
Land 2 with a width corresponding to the 40-inch width had been repaired.

On the other hand, as shown in FIG. 3, which is a perspective view of the multilayer ceramic capacitor 3 showing a partially exposed surface, the internal electrode 6 is drawn out to the side of the pole 4, so the upper and lower portions (3) of the external electrode 4 are It continued airily beyond the edge of one side of the drawer surface. In the case of Naoman-zokuzukuri, the ridges on one side and the corners of the corner of the corner area are severely worn, and the mechanical strength is weaker than that of the individual parts, so Figure 4 shows a partially enlarged cross-sectional view. As shown, 8 parts of the external electrode 4 at the missing part are cut out, and 1 part is cut out at the rounded part 7.
The JL Ki's laces had the drawback of being left open.

In addition, even if the 9 holes in Figure 1 (mounted parts) are not in the open state, the electrical resistance of the rounded oil part 7 in Figure 4 will be large, and therefore the demonic resistance will be large. As a result, Iwamakura's reliability was depressing.

The main purpose of the present invention is to provide a method for assembling a 1M ceramic multilayer ceramic capacitor.

According to the present invention, there is provided a method for assembling a multilayer ceramic capacitor, which is characterized in that the multilayer ceramic capacitor is rounded in advance before the formation of the outer region, and then the outer capacitor 4 is rounded to MA5.

In particular, according to the present invention, a material that is included in the composition of the output dielectric body, or a material that does not cause a chemical reaction with the A-type dielectric material in the temperature range of 5000 to 800°C, or a sintered product thereof, is used. Laminated ceramic is produced by crystallizing a powder with a particle size of 1.0 mm or less with a buffer solution, inserting a non-ceramic capacitor with an external electric shock into the solution, and polishing the container by rotating it for a short period of time. A surface fabrication method for a multilayer ceramic capacitor is obtained, which includes a step of rounding and rounding each corner and a portion of the corners of the capacitor.

Hereinafter, the present invention will be explained in detail with reference to FIGS. 5 to 8. Fig. 5 t13 to (d) are 8t used when applying the present invention.
FIG. 3 is a diagram illustrating a specific example of the outer region shape of a JIl agent. The belief effect is that the shape of the triangular prism shown in Fig. 1 (a) K is extremely excellent, and the shape of the triangular prism shown in Fig. 1 (b) of Kyu Kei, the cylinder of the first evil (C),
The shape of the sphere in Fig. 1(d) is inferior to the haziness of the sphere. Laminated ceramic, Kufundensa itself also has the ability to be used as an abrasive.81
This may be due to the effect of the shape of Figure 1bJ and the degree of sameness. These abrasives are also shaved off by Kenkosaku Higashi, and the ground powder is called Nocera! It forms a layer on the capacitor and reduces the performance of the capacitor under A temperature conditions in the external electrode baking process. For this reason, the material for the polishing agent is +it, the material constituting the sieve porcelain of the ceramic capacitor, as described above, and the polishing material such as Sakamoto (Sin, ).
Materials that do not react with the idiE body at high temperatures or a combination thereof are suitable, and powders of these materials or those obtained by pressing into a predetermined shape and sintering are used. The size of the abrasive can be up to about 10 times the size of the multilayer ceramic capacitor, but for the ease of assembling the capacitor and abrasive after abrasive, it is recommended to use a large particle size of 1.0 or less. It's definitely cheap. In other words, the W of a multilayer ceramic capacitor
ljZ w-shape is 1. OX 1.25 X 2.0-
By using an appropriate sieve, it can easily be separated from abrasives with a maximum particle size of 1.0 mm or less. The sixth figure shows the appearance of the cylindrical ceramic capacitor before polishing.

As an example of the essential conditions, c is a cylindrical rotary pot made of plastic with a total circular volume of about 50°C, a porcelain sieve capacitor having a shape as shown in Fig. 6 placed in the case, and a Approximately 1
A 0 to 20% volume ratio of an abrasive such as abrasive wood (810) is added.

Next, add splash water as a beard liquid, and make up 80-90% of the total internal volume.
Close the lid and set the rotation speed to 30~6 u rpm.
So 1 hour ~ 511? Rotate it for a while and take it out.

The mouth and roundness shown in the skin view of Figure 7
If you remove 54 parts of the multilayer ceramic capacitor and apply a fake cloth to 1 and bake it, the thickness will be uniform over the entire external electrode 4 as shown in the partial cross section of the exposed state in Fig. 8. An electrode can be formed, and the reliability of the 11E connection with land 2 is exactly the same as above.

Here, the outside st bulk leg attachment treatment is performed at a temperature of 500°C to 80°C.
Since the process is carried out at a temperature of 0°C, a chemical reaction occurs between the fiber IMII of the no-ceramic capacitor and the abrasive coated with FrbK from the inner shell drawer S. When we hire , the m-formation of the electric body changes, /f
Not only is the r-post reduced, but the 18 degrees of lamination of the multilayer ceramic capacitor is significantly reduced. For this reason, 9'
As for the materials for heavy punishment, the XL material contained in the composition that makes up the 6 fermentation plates or the 7 corpse conglomerates) is 41% better, and the other materials are 1fflt! fif) Materials that do not cause a chemical reaction with the elongated body at high temperatures of at least 500°C and 800°C, such as Si0g
), Oxidation Schiff 1. By adding Conium (ZrOl), 7 Lumina (120g per person), etc.
It was found that a good % concentration could be obtained. In addition to the above, titanium oxide, titanium imaginary barium, barium carbonate, etc. can also be used as polishing materials. Let's use it.

As explained above, according to the present invention, the corners and ridges of a multilayer ceramic capacitor before the formation of external electrodes are rounded by a relatively smooth rounding treatment comparable to fIk, and then an outer S-edge is formed. As a result, a multilayer ceramic capacitor with high reliability of single-capacity connection is coupled. If the polishing temperature is set to 115 to 1/lO or more of the minimum side length of the original rectangular parallelepiped, the objective of the present invention will be achieved.

A brief explanation of the 41st direction, and Figure 2 is a perspective view and an enlarged view showing an example of a ceramic capacitor.
- is a perspective view of a conventional capacitor including a partial cross section to show the arrangement of internal electrodes.

FIG. 4 is an enlarged cross-sectional view of the external electrode portion of a conventional capacitor.

Figures 5 (&) to (d) are ^9? of the present invention? 'J Ken,
j# A perspective view showing the concrete shape of the piece. The 6th prisoner is external IE4
FIG.

7th figure is a perspective view showing the outer area of the grinder according to the present invention shown in FIG. 6; The eighth figure is an enlarged circle view of the mounting part showing one embodiment of the present invention.

1... Sera ξ, ri loquat base value, 2... 41 as sex land.

3...Kan J-Cera i/Ku capacitor, 4...Outside M%
Others, 5... Solder, S... Inner sit image, 7... Rounded part.

Agent Patent Attorney Internal Quantity Concave One Sip ('Ij, J Old 1-2', =Lvl'=
I, ) Figure 1 Figure 2 Figure 3 Figure 5 (reverse) (b) (C)
(d) vJ6 Figure 7 Figure 8 Procedural amendment (method) % formula % 1. Indication of case 1985 Request for permission No. 2962
No. 2, "" (7) Name Manufacturing method of multilayer ceramic capacitors 3, Relationship with the case of the person making the amendment Applicant, -)
5-33-1-4 Shiba, Minato-ku, Tokyo, Agent

Claims (1)

[Claims] A method for manufacturing a multilayer ceramic capacitor including a step of encapsulating a plurality of electrode layers in a ceramic dielectric to form an external electrode connected to the electrode layer, in which a corner of the dielectric is removed before forming the external electrode. and a method for manufacturing a multilayer ceramic capacitor, comprising the step of rounding the entire edge.