JPS61166019A - Manufacture of electronic component - 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 method of manufacturing a ceramic electronic component having an identification mark.

BACKGROUND OF THE INVENTION Identification marks formed on ceramic electronic components are generally known. This identification mark can be formed by printing with ink containing dye or pigment after firing the ceramic electronic component, or it can be formed with an inorganic oxide on the ceramic electronic component before firing, and it can be fired at the same time as the ceramic electronic component. It is formed by

The conventional configuration will be described below with reference to FIGS. 2, 3, and 4.

FIG. 2 shows an example of internal electrodes of a multilayer multi-capacitor. By sequentially stacking capacitor sheets having the electrode patterns shown in (a) and (b) of FIG.
A capacitor C2 is formed by this, and a υ capacitor C3 is formed by the electrode layer 6°6'. FIG. 3 shows a laminated multi-capacitor formed using the electrode pattern shown in FIG. Identification mark 1 is placed on the surface of the laminated multi-capacitor on the terminal electrode T to identify the terminal electrodes 7, 8゜9...
form 0.

In order to print this identification hook with ink or the like after firing, there is a contradiction in that the terminal electrode 7 must be identified and positioned before printing the identification mark. Therefore, an identification mark made of a second porcelain material that does not burn out even when fired is used. Figure 4 shows its configuration.
Figure CC' is a sectional view. In Figure 4, 11 is C
It is a first ceramic material whose main component is aTiO3, and is a dielectric material.

12 is an electrode layer, and 13 is an identification mark using an inorganic oxide.

The identification mark configured as described above is not sintered with the first porcelain material, or is colored by reacting with the first porcelain material and diffusing.

Problems to be Solved by the Invention However, with the above configuration, if the second porcelain material used for the identification mark is not sintered with the first porcelain material, the identification mark may not adhere to the electronic component substrate. less powerful,
It was weak against mechanical shock and had the disadvantage that only the identification mark could be partially scraped off. On the other hand, an identification mark made of a second porcelain material that is colored by reacting with the first porcelain material can be created by applying only the second porcelain material directly onto the first porcelain material.
It has the problem that it strongly reacts with the first porcelain material and causes shape defects such as excessive coloring and warping during sintering of electronic components made mainly of the first porcelain material. .

In view of the above-mentioned problems, the present invention provides a method for manufacturing ceramic electronic components that can form identification marks on ceramic electronic components whose main component is CaTiO3 without excessive coloring or defective shapes. be.

Means for Solving the Problems In order to solve the above-mentioned problems, the method for manufacturing electronic parts of the present invention includes applying the above-mentioned method to the electronic parts before firing, which is made of a first porcelain material containing CaTiO3 as a main component and a stent. A mixture of a first porcelain material and a second porcelain material containing CeO2 as a main component (in addition, a paste formed by blending the first porcelain in the mixture is applied by printing, etc., and at the same time at 1200 ° C to 1360 "C The method is to bake it.

Operation According to the present invention, the first porcelain material is sintered, and the CeO2 reacts with the first porcelain material to be colored diffused reddish-brown to form an identification mark.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a sectional view of an electronic component in an embodiment of the present invention. 1 is the first porcelain material, CaT
It is a dielectric material whose main material is iOs.

2 is an identification mark, which indicates CaT as the first porcelain material.
It is composed of a dielectric material mainly composed of iO3 and a second porcelain material mainly composed of a mixture of CeO2. The above identification mark is a dielectric material whose main material is CaT 103 in the above mixture and a weight ratio of CeO□ of 20% in the dielectric material.
, CaT 10380%, made into a paste using an organic vehicle and three rollers, and printed. Moreover, the amount of organic vehicle in the paste is 50wt%.
Closed. 1320 degrees of electronic components configured as above.
When fired at C, CeO2 becomes C as shown by dotted line 3.
a T 103 Approximately 200μm in the entire main dielectric material
It is diffused and has a reddish-brown color. Moreover, since the identification mark is a mixture, the coloring is more uniform compared to when only CeO2 is used, excessive reaction is avoided, and the adhesion is strong.
Defects such as warpage in electronic components made of the first porcelain material are drastically reduced.

Further, in the above paste, the weight ratio of the first porcelain material and the first porcelain material in the mixture of CeO2 is 20% or less, and
When O2 exceeds 80%, CeO2 diffuses so strongly during firing that it cannot be used as an identification mark.

Further, when the CeO2 content in one paste is in the range of 1.6 to 40%, it exhibits good coloring and can be used as an identification mark.

As described above, according to this embodiment, the amount of CeO2 can be changed continuously, the amount of reaction can be adjusted, and the degree of coloring can be freely changed.

Moreover, since the first porcelain material containing CaTiO3 as the main component is mixed, only the identification mark part does not become a ceramic that is extremely different from the ceramic that constitutes the electronic component, and there is no difference in mechanical strength. There is an advantage that there is no

In this example, the amount of vehicle in the paste was limited to 50 wt%, but at least
The amount of vehicle may be changed as long as the e OR amount is 1.5 to 40% and the weight ratio of Ce O2 in the first porcelain material and Ce O2 mixture is 6 to 80%.

Effects of the Invention As described above, the present invention provides a first porcelain material and a second porcelain material containing CeO2 as a main component on an electronic component made of a first porcelain material containing Ca T 10s as a main component. After applying a mixture of materials and co-firing, the first porcelain material is sintered and CeO2 becomes a diffusion-colored identification mark, which improves the adhesion strength and mechanical strength of the mark. The degree of reaction when diffused into the first porcelain material mainly composed of Ca T x Os and colored can be adjusted by changing the mixing ratio of the first porcelain material and CeO2, This has the extremely excellent advantage of not affecting the shape of electronic components.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of an electronic component showing an embodiment of the present invention, Figures 2 (a) and (b) are pattern diagrams showing internal electrode patterns of a conventional multilayer multi-capacitor, and Figure 3 is a cross-sectional view of an electronic component showing an embodiment of the present invention. Perspective view of the capacitor, Figure 4 is Figure 3 CC'
FIG. 1...First porcelain material, 2...Identification mark.

Claims (3)

[Claims] (1) A mixture of the first porcelain material and a second porcelain material mainly composed of CeO_2 and resin is placed on the electronic component before firing, which is made of a first porcelain material mainly composed of CaTiO_3 and resin. After applying the paste and firing at the same time, the first porcelain material is sintered, and the second porcelain material is reacted with the first porcelain material to form a colored identification mark. How the parts are manufactured. (2) The first paste whose main component is CaTiO_3
The weight ratio of the first porcelain material in the mixture consisting of the porcelain material and the second porcelain material whose main component is CeO_2 is 20 to 9.
5%, and the weight ratio of CeO_2 is 5 to 80%. (3) The weight ratio of CeO_2 in the paste is 1.5 to 4
2. The method for manufacturing an electronic component according to claim 1, wherein the amount is 0%.