JPS61166016A - 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 FIG. , 61 form a capacitor C5. FIG. 3 shows a laminated multi-capacitor formed using the electrode pattern shown in FIG. In order to identify the terminal electrodes 7, 8, 9, . . . , an identification mark 10 is formed on the surface of the laminated multi-capacitor on the terminal electrode T. In order to print with ink or the like after the identification mark 10 is completely fired, there is a contradiction in that the terminal electrode 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. FIG. 4 shows its constituent metal, and is a cross section taken along line C-at in FIG. In FIG. 4, numeral 11 is a first ceramic material mainly composed of MgTiO3f, which 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 MgTiO3 without excessive coloring or defective shapes. be.

Means for Solving the Problems In order to solve the above problems, the method for manufacturing electronic components of the present invention uses MgTiO. A mixture of the above-mentioned first porcelain material and a second porcelain material mainly composed of C602 is placed on a pre-fired electronic component made of a first porcelain material mainly composed of gold and resin (in addition, the first porcelain material in the mixture The weight ratio of the materials is 20~
95%, CeO2 5-80%) and organic vehicle 1c
A paste prepared by mixing eo2 of 1.5 to 40% is applied by printing, etc., and at the same time heated to 1000°C to 135°C.
This method involves firing at 0'C.

Function: According to the method described above, the first porcelain material is sintered, and the CeO□ is diffused and colored reddish brown by reacting with the first porcelain material to form an identification mark.

EXAMPLE An example of the present invention will be described below 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, MgTi
It is a dielectric material whose main material is O3.

2 is an identification mark, MgT as the first porcelain material
It is composed of a dielectric material mainly composed of iO3 and a second ceramic material mainly composed of a mixture of CeO2. The identification mark is the MgTiO in the mixture. The weight ratio of the main dielectric material and CeO2 is 80%,
C: 60220%, made into a paste using an organic vehicle and three rollers, and printed. Moreover,
The amount of organic vehicle in the paste was sowt'%.

When the electronic component configured as described above is fired at 11,320°C, CeO, , becomes MgTiO as shown by dotted line 3.
．． It diffuses approximately 200 μm into the dielectric material, which is the main material, and exhibits a reddish-brown color. Moreover, since the identification mark is a mixture, the coloring is more uniform compared to the case where only Coo 2 is used, excessive reaction is avoided, and the adhesion is strong, which makes it easier for electronic components made of the first porcelain material. Defects such as warping are drastically reduced.

Further, the weight ratio of the first porcelain material in the paste and the first porcelain material in the mixture of CeO2 is 20% or less, and C
When eO2 is 80% or more, CeO2 diffuses so strongly during firing that it cannot be used as an identification mark. Further, when the CeO□ content in the paste is in the range of 1°5 to 40%, it exhibits good coloring and can be used as an identification mark.

As described above, according to this embodiment, the amount of CEO can be completely 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 MgTiO 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 a difference in mechanical strength. There is an advantage that there is no

In this example, the amount of vehicle in the paste was 5wt%, but at least
The amount of O2 is 1.5 to 40%, and the first porcelain material and Ce
The amount of vehicle may be varied as appropriate so long as the weight ratio of C002 in the O2 mixture is 5 to 80%.

Effects of the Invention As described above, the present invention provides a method of applying a mixture of a first porcelain material and a second porcelain material containing CeO21 as a main component onto an electronic component made of a first porcelain material containing MgTiO3 as a main component. After coating and co-firing, the first porcelain material is sintered and Gem2
Since the mark is a diffusion-colored identification mark, the adhesion strength and mechanical strength of the mark are improved.
By changing the mixing ratio of the first porcelain material and CeO7, the degree of reaction when 2 diffuses into the first porcelain material mainly composed of MgTiO3 and colors it can be adjusted. This has the extremely excellent advantage of not affecting the shape or the like.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of an electronic component showing an embodiment of the present invention, and Figures 2 (2L) and (b) are conventional laminated multi-converter/
It is a sectional view taken along the line a-at. 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 an electronic component before firing, which is made of a first porcelain material mainly composed of MgTiO_3 and a 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 MgTiO_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 40
%. %. The method for manufacturing an electronic component according to claim 1.