JPH05190404A - Formation method of electrode for electronic component - Google Patents

Abstract

PURPOSE:To apply a paste for electrode formation use in such a way that it is continuous with the following: an edge at a sheetlike body which is composed of a ceramic or a synthetic resin; and at least one side face out of two opposite side faces which are continuous with said edge. CONSTITUTION:A paste 2A is filled into recessed parts in a paste holding member (a roller) 3 in which the recessed parts have been formed; after that, the surface of the paste 2A which has been held in the recessed parts is brought into contact with and edge 1a at a sheetlike body 1; the paste 2A is applied to the edge 1a and a side face 1b. Consequently, electrodes whose size and number are as desired can easily and efficiently be formed with good accuracy by means of one transfer treatment. The productivity of the title method can be enhanced, and the yield of the title method can be enhanced by preventing the dislocation of the electrodes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode forming method for an electronic component, and more particularly, to easily, efficiently and highly accurately form an electrode continuous to an end face of a plate-shaped electronic component and a side face connected to the end face. The present invention relates to a method of attaching an electrode forming paste.

[0002]

2. Description of the Related Art As shown in FIG. 13, an end face 1a of a plate-like electronic component 1 made of ceramic or synthetic resin and the end face 1 are shown.
When forming the electrode 2 across at least one side surface (both side surfaces in FIG. 13) of the two facing side surfaces 1b and 1c connected to a, the electrode forming method by screen printing has been conventionally adopted. ..

In order to form such an electrode by the screen printing method, first, as shown in FIG. 14, inside the cavity 11 of the intermediate plate 12 in which the cavity 11 is formed,
The electronic component 1 is inserted and erected so that the upper portion projects, and the upper end surface 1a of the projecting electronic component 1 is screen-printed with an electrode forming paste from above to form the electrode 2a of the end surface 1a.

After that, as shown in FIG. 15, an intermediate plate 14 having a cavity 13 capable of holding the electronic component 1 in a state of being laid down is used, and as shown in FIG. First, the electronic component 1 is placed in the cavity 13, and the end face 1
It is inserted so that one side surface 1b connected to a is the upper surface.

Next, after forming the electrode 2b on this side surface 1b by screen printing, the electronic component 1 is reinserted into the cavity 14 so that the other side surface 1c is the upper surface, and this side surface 1c is screen printed by this method. The surface electrode 2c is formed. As a result, the electrodes 2 (2a, 2b,
2c) is formed. Reference numeral 15 is a vacuum drawing hole.

[0006]

The above-mentioned conventional electrode forming method has the following problems.

At the time of screen printing of the end surface 1a shown in FIG. 14, as shown in FIG. 17, the electrode paste 2A
Adheres to the vicinity of the edge portion 12A of the intermediate plate 12, or due to the existence of a gap between the cavity 11 and the electronic component to be inserted into the cavity 11, the electrode paste 2A penetrates into the inside of the cavity 11. May get dirty.

As shown in FIG. 14, since the upper part of the electronic component 1 projects from the intermediate plate 12, the projected electronic component 1 may cause crevices or scratches on the screen, resulting in poor printing accuracy.

When screen printing of the side faces 1b and 1c shown in FIG.
To prevent the electronic component 1 from adhering to the screen mask. In this case, one side surface 1
When the other side surface 1c is printed after printing b, a gap 14A is formed between the electronic component 1 and the intermediate plate 14 due to the thickness of the electrode 2b on the side surface 1b which is the bottom surface side. For this reason,
Even if vacuuming is performed, air leakage occurs in the gap 14A, so that the electronic component 1 cannot be stably adsorbed to the intermediate plate 14, and the electronic component 1 adheres to the screen mask during screen printing. Sometimes.

Since the side surfaces 1b and 1c connected to the end surface 1a are printed one by one, it is necessary to dry the previously printed portion (2b) and then turn over the electronic component 1, and also the end surface 1
Since a and the side surfaces 1b and 1c connected to this are separately printed, the productivity is poor.

As shown in FIG. 18, an electrode 2a formed on the end surface 1a and an electrode 2b formed on the end surface 1b or 1c
Alternatively, there is a possibility that a positional deviation may occur between 2c and 1c, which may result in a defective product.

The present invention solves the above-mentioned conventional problems and easily, efficiently, and highly accurately forms an electrode continuous to the end face of the plate-shaped electronic component and the side face connected to this end face by one treatment. An object of the present invention is to provide a method for forming an electrode of an electronic component that can be used.

[0013]

According to a first aspect of the present invention, there is provided an electrode forming method for an electronic component, wherein an end face of a plate-like body made of ceramic or synthetic resin and at least one of two side faces which are continuous with the end face are continuous. In the method of forming an electrode of an electronic component by attaching an electrode forming paste as described above, after filling the paste in the concave portion of the paste holding member having the concave portion, the surface of the paste held in the concave portion Is brought into contact with the end face of the plate-like body to adhere the paste to the end face and the side face.

According to a second aspect of the present invention, there is provided an electrode forming method for an electronic component according to the first aspect, wherein the paste holding member is a roller having a concave groove formed on a side peripheral surface thereof.

According to a third aspect of the present invention, there is provided an electronic component electrode forming method according to the first aspect, wherein the paste holding member is a plate-shaped member having a groove formed on the plate surface.

[0016]

The electrode forming paste is filled with the electrode forming paste by filling the concave portion of the paste holding member with the electrode forming paste and bringing the surface of the paste held in the concave portion into contact with the end face of the plate member from above. Face 2 facing the end face
It can be attached continuously to at least one of the side surfaces.

That is, the electrode forming paste filled in the recess of the paste holding member hangs down from the recess due to its viscosity, surface tension and gravity. When this sagging electrode forming paste is brought into contact with the end face of the plate-shaped body from above, the paste is piled up on the end face, and at the same time, the viscosity, surface tension and gravity of the electrode forming paste cause an end face of the plate-shaped body. And a paste adhesion layer continuous to the side surface is formed.

In the present invention, as the paste holding member, a roller having a concave groove formed on the side peripheral surface thereof or a plate-shaped member having a concave groove formed on the plate surface thereof is preferably used.

[0019]

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIGS. 1 to 6 are views showing a method of the first embodiment of the present invention in which a roller having concave grooves formed on its side surface is used as a paste holding member, and FIGS. 12th
The figure is a diagram showing a second embodiment method of the present invention in which a plate-shaped member having a groove formed on the end face is used as the paste holding member.

In the method of the first embodiment, a roller 3 having concave grooves 3A, 3B, 3C formed on its side peripheral surface is used as the paste holding member. That is, as shown in FIG. 1 (plan view) and FIG. 2 (cross-sectional view taken along line − of FIG. 1), the paste scraping of the paste filling container 4 holding the electrode forming paste 2A on the roller 3 is performed. Rotate on the paste leveling plate 4C between the take-up plates 4A and 4B. This allows
The paste 2A is filled in each of the grooves 3A, 3B, 3C, and the excess paste attached to the areas other than the grooves 3A, 3B, 3C is scraped off.

The grooves 3A, 3B of the roller 3 are
3C is formed with a predetermined number of grooves, width, depth, and interval according to the number of electrodes to be formed, electrode positions, electrode widths, electrode thicknesses, and electrode formation intervals.

On the other hand, the plate-shaped electronic component 1 forming the electrode is
As shown in FIG. 3 (front view) and FIG. 4 (enlarged view of the cross section taken along the line − in FIG. 3), the holding member 5 having the concave groove 5A.
Into the concave groove 5A, the end face 1a forming the electrode is inserted so as to project, and both sides are fixed by the stoppers 6A and 6B.

Then, with respect to the end surface 1a of the electronic component 1 fixed in this way, the roller 3 in which the concave grooves are filled with the electrode forming paste 2A is lowered from above. Then, as shown in FIG. 5 (cross-sectional view), the paste 2 in the groove is formed.
The surface of A is brought into contact with the end surface 1a of the electronic component 1 from above. As a result, the electrode forming paste 2A is transferred and placed on the end surface 1a of the electronic component 1.

After that, when the roller 3 is raised,
As shown in the drawing (cross-sectional view), the transferred paste has an end surface 1a of the electronic component 1 due to its viscosity, surface tension and gravity.
And 2 side surfaces 1b and 1c (see FIG. 4). As a result, the electrode 2 (consisting of 2a, 2b, 2c (2c is not shown)) continuous with the end face 1a and the side faces 1b, 1c is formed.

In the second embodiment method shown in FIGS. 7 to 12, a groove 7 is formed on the lower end surface as a paste holding member.
The plate-shaped member 7 on which A, 7B and 7C are formed is used. That is, as shown in FIG. 7 (cross-sectional view), FIG. 8 (cross-sectional view), and FIG. 9 (cross-sectional view taken along line − in FIG. 8), first,
The concave grooves 7A, 7B, 7C on the lower end surface of the plate-shaped member 7 are dipped in the electrode forming paste 2A of the paste filling container 8 having a notch 8A for scraping formed on one side surface. , Then pull up. Then, by pulling out in parallel with the scraping notch 8A (see FIGS. 8 and 9).
In the figure), the groove 2A, 7B, 7C is filled with the paste 2A, and excess paste attached to other than the groove 7A, 7B, 7C is scraped off.

The concave grooves 7A, 7B of the plate member 7 are
7C is formed with a predetermined number of grooves, width, depth, and interval according to the number of electrodes to be formed, electrode positions, electrode widths, electrode thicknesses, and electrode formation intervals.

On the other hand, the plate-shaped electronic component 1 forming the electrode is
As in the case of the first embodiment, the holding member 5 having the groove 5A is inserted into the groove 5A so that the end face 1a forming the electrode protrudes, and both sides are fixed by the stoppers 6A and 6B. ..

Then, as shown in FIG. 10 (cross-sectional view),
With respect to the end surface 1a of the electronic component 1 fixed in this way, the plate-shaped member 7 in which the electrode forming paste 2A is filled in each recess is lowered from above. Then, as shown in FIG. 11 (cross-sectional view), the surface of the paste 2A in the groove is brought into contact with the end surface 1a of the electronic component 1 from above. As a result, the electrode forming paste 2A is transferred and placed on the end surface 1a of the electronic component 1.

After that, when the plate member 7 is raised, the first
As shown in FIG. 2 (cross-sectional view), the transferred paste has an end surface 1 of the electronic component 1 due to its viscosity, surface tension and gravity.
The electrode 2 (2 that extends from a toward the two side faces 1b, 1c (see FIG. 4) and is continuous with the end face 1a and the side faces 1b, 1c.
a, 2b, 2c (however, 2c is not shown) are formed.

In both the first and second implementation methods described above, it is possible to form an electrode continuous on the end face and two side faces by one transfer.

Further, since the electronic component is fixed by the stopper, the electronic component is not pulled up at the same time when the roller or the plate member is raised after the transfer.

The method of the present invention is not limited to the first and second implementation methods described above, and other implementation methods may be adopted as long as the gist thereof is not exceeded.

For example, the size and shape of the paste holding member, the shape and size of the recesses, the number and the like can be appropriately selected according to the purpose.

[0035]

As described above in detail, according to the electrode forming method for an electronic component of the present invention, the end face of the plate member and at least one of the two side faces continuous with the end face are connected by one transfer operation. Electrodes can be formed.

Therefore, the number of processing steps is greatly reduced and the productivity is improved. The electrode formed by the end face and the side face is not displaced, and the yield is high. There is no need to perform vacuum suction, and the problem due to vacuum suction is solved. By adjusting the groove intervals, depths, widths, etc. of the paste holding member, it is possible to easily and highly accurately form electrodes of all aspects including the electrodes of the gorge pitch. Excess paste of the paste holding member can be easily removed, and contamination of parts due to excess paste can be prevented. Problems with screen printing are eliminated. And the like.

[Brief description of drawings]

FIG. 1 is a plan view illustrating a method of filling a paste holding member with a paste in a method according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line − in FIG.

FIG. 3 is a front view showing a paste adhering method in an embodiment method of the present invention.

FIG. 4 is an enlarged view of a cross section taken along line-in FIG.

FIG. 5 is a cross-sectional view showing a paste adhering method in a method according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a paste adhering method in a method of an embodiment of the present invention.

FIG. 7 is a cross-sectional view illustrating a method of filling a paste holding member with paste according to another embodiment of the present invention.

FIG. 8 is a cross-sectional view illustrating a method of filling a paste holding member with paste in a method according to another embodiment of the present invention.

9 is a cross-sectional view taken along line-in FIG.

FIG. 10 is a cross-sectional view showing a paste adhering method according to another embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a paste adhering method according to another embodiment of the present invention.

FIG. 12 is a cross-sectional view showing a paste adhering method in another embodiment method of the present invention.

FIG. 13 is a perspective view showing an electronic component having electrodes formed thereon.

FIG. 14 is a perspective view showing a conventional electrode forming method.

FIG. 15 is a perspective view of an intermediate plate used in a conventional electrode forming method.

FIG. 16 is a cross-sectional view showing a conventional electrode forming method.

FIG. 17 is a sectional view of an intermediate plate showing a problem of the conventional method.

FIG. 18 is a perspective view of an electronic component showing a problem of the conventional method.

[Explanation of symbols]

 1 Electronic Components 2, 2a, 2b, 2c Electrode 2A Electrode Forming Paste 3 Roller 3A, 3B, 3C Recessed Groove 4,8 Paste Filling Container 5 Holding Member 6A, 6B Stopper 7 Plate Member 7A, 7B, 7C Recessed Groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuguo Kaise 972 Urasa, Yamato-cho, Minamiuonuma-gun, Niigata Case

Claims (3)

[Claims] 1. An electrode for an electronic component, wherein an electrode forming paste is attached so as to be continuous with an end surface of a plate-shaped body made of ceramic or synthetic resin and at least one of two side surfaces facing each other connected to the end surface. In the method for forming, the paste holding member having a concave portion is filled with the paste, and the surface of the paste held in the concave portion is brought into contact with the end face of the plate-shaped body to form the paste. And a method for forming an electrode of an electronic component, characterized in that the electrode is attached to the side surface. 2. The method for forming an electrode of an electronic component according to claim 1, wherein the paste holding member is a roller having a concave groove formed on a side peripheral surface thereof. 3. The method for forming an electrode of an electronic component according to claim 1, wherein the paste holding member is a plate-shaped member having a groove formed on the plate surface.