JPS5830732B2 - Method of printing a metallized layer or an insulating layer on the end face of a ceramic electronic component - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for printing metallization or insulating layers on the end faces of ceramic electronic components.

For example, there are cases where it is necessary to apply a metallized layer or an insulating layer to the entire end face of an electronic component such as a ring-shaped alumina ceramic as shown in FIG.

Since it is extremely difficult to apply such a metallized layer or insulating layer by screen printing, workers have to carefully apply the metallized paste or insulating paste by hand.

For this reason, it is time-consuming and the thickness of the applied metallizing paste layer or insulating paste layer is uneven, and as shown in Figure 2, the applied metallizing paste or insulating paste tends to be excessive. It has the disadvantage that it sag from the end surface.

The method of printing a metallized layer or an insulating layer on the end face of a ceramic electronic component according to the present invention solves the above-mentioned drawbacks of the conventional method.The method of printing a metallized layer or an insulating layer on the end face of a ceramic electronic component eliminates the above-mentioned drawbacks found in the conventional method. This method involves removing excess paste that has oozed out from the back surface and then applying this screen to the end surface of the ceramic electronic component.

The present invention will be explained in more detail based on illustrated embodiments.

First, as shown in FIG. 3, metallizing paste or insulating paste is applied to a screen made of fiber 1 such as stainless steel or silk using a paste applicator such as a roller or a doctor blade.

At this time, paste 2 also oozes out to the back side of the screen.

Next, as shown in FIG. 4, the back side of this screen is scraped off with a doctor blade or the like to remove the excess paste that has oozed out.

Then, by applying this screen to the end surface of the electronic component, as shown in FIG. 5, the paste 2 is evenly printed on the end surface 3 of the electronic component.

By firing the printed material, this electronic component has a metallized layer or an insulating layer on the end surface.

Since the present invention is configured as described above, in addition to coating the end face with an insulating layer such as metallized glass, it is also possible to provide an ohmic electrode on the end face.

That is, for example, as shown in FIG.
The present invention may also be used as a method for providing electrodes on the lattice surface 4 of a positive temperature heating element having a honeycomb structure as described in Japanese Patent No. 130.

In this case, in addition to simply pressing the screen from which excess paste has been removed onto the lattice surface 4 of the honeycomb body, it is also possible to print more uniformly on all lattice surfaces by rubbing the pressed screen with a squeegee or the like. can.

Note that the electrode paste applied to the PTC heating element must be baked after printing so as to come into ohmic contact with the PTC heating element.

According to the present invention, metallized paste or the like can be easily and accurately printed on the end face of electronic components, so the reliability of electronic components is improved, and the present invention greatly contributes to the development of this type of industry.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an example of an electronic component that requires a metallized layer to be applied to the end face, Fig. 2 is an enlarged explanatory view of a hand-printed end face, and Figs. 3 and 4 are explanatory diagrams of the process of the present invention. , FIG. 5 is an enlarged explanatory view of an end face printed by the method according to the present invention, and FIG. 6 is a perspective view of another electronic component to which the method of the present invention can be applied. 1...Screen fiber, 2...Printing paste.

Claims (1)

[Claims] 1. A metallized layer or insulating paste, which is characterized by applying metallizing paste or insulating paste to the screen from its surface, removing the excess paste oozing out from the back side of the screen, and then applying this screen to the end surface of a ceramic electronic component. A method of printing an insulating layer on the end face of a ceramic electronic component.