JPH0590107A - Method of forming outer electrode conductor of electronic parts - Google Patents

Abstract

PURPOSE:To improve coating position precision, and realize uniform belt type coating on the end surface of a parts element and the surface linking to the end surface, in a method wherein a plurality of trenches are arranged, and conductive paste is spread so as to permeate into an adjacent surface from a surface of the electronic parts element. CONSTITUTION:On a hard flat plate elastic body 1, a pair of plate type bodies 2 which have elastic force softer than the body 1 are arranged and fixed in parallel to each other at a specified interval. Facing surfaces of the plate type bodies 2 are inclined. These inclined surfaces and the flat plate elastic body 1 constitute a recessed part, in which a plurality of trenches 3 are formed. After the trenches 3 are filled with conductive paste, the end surface of each parts element is inserted into the recessed part, and pressed against the flat plate elastic body 1. Thereby the conductive paste is transferred to the end surface of the parts and the side surface linking to the end surface.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an inductor array, L
The present invention relates to a method for forming an external connection terminal (conductor) of an electronic component which is formed in a continuous strip shape such that a terminal for external connection such as a C filter extends from one end face of an element body to a surface continuous with it.

[0002]

2. Description of the Related Art A method for continuously forming strip-shaped external electrode terminals from one end face of an electronic component body to at least one adjacent face is as follows: (1) A plurality of grooves formed in a flat plate elastic body A conductive paste is filled in and the end face of the electronic component element body is pressed against the elastic body to apply the paste (see JP-A-2-33908),
Alternatively, (2) an electron is provided by placing a slit plate having a slit having a width corresponding to the width of an electrode to be formed on a conductive paste bath, raising the liquid level of the paste bath, and placing the liquid on the slit plate. A method of applying to the end face of the component body (Japanese Patent Laid-Open No. 25662/1990)
25) and the like are known.

The method disclosed in Japanese Patent Application Laid-Open No. 2-33908 (1), which is relatively easy to operate, is as follows.

That is, as shown in the perspective view of FIG. 4, an intaglio having a plurality of grooves 3 formed in parallel with the flat elastic body 1 is prepared, and the groove width and groove pitch of these grooves are set to the side surface of the electronic component body 6. Corresponding to the width and arrangement interval of the external terminal electrodes to be formed, the groove of the intaglio is filled with the conductive paste 4 by squeezing, and the relative position of the end surface to form the external electrode of the electronic component and the groove. And press the end face against the elastic body so that the conductive paste wraps around to the surface (side face) continuous with the end face, and then pull up the electronic component element body 6 to form a predetermined external electrode. .

[0005]

However, the method disclosed in JP-A-2-33908, which uses an elastic body, has the following problems to be improved.

(1) The amount of conductive paste applied as an external electrode to the surface (side surface) connected to the end face of the electronic component element body depends on the amount of the element body pressed into the elastic body. Therefore, since the element can be applied to the conductive paste strongly (end face) and weakly (side), the paste cannot be applied uniformly, and as a result, strength cannot be obtained in the thin portion of the completed terminal electrode. . Further, it is difficult to set the pushing amount, and therefore it takes time to adjust.

Since the chip parts vary in size, it is difficult to collectively process a large number of chip parts and the like.

(2) Even if the element body is in contact with the elastic body while the position of the external electrode terminal of the electronic component element body is angularly displaced from the position of the groove formed in the elastic body, The conductor is applied as it is, and the accuracy of the application position cannot be improved.

Therefore, an object of the present invention is to solve the above-mentioned problems, and even if chip parts and the like are collectively processed, the application position is accurate and the paste for external electrode terminals is uniformly applied to the electronic part body. It is an object of the present invention to provide a method capable of being applied in a strip shape over the end surface and the surface continuous with the end surface.

[0010]

As a result of research to achieve the above object, the inventors of the present invention have found that the hardness of an elastic body in contact with the end face of a component element body and the hardness of an elastic body in contact with a side face continuous with the end face as necessary. By making a difference in the latter to make the hardness of the latter lower than that of the former, in other words, by using two kinds of elastic bodies of hard and soft, the pair of plate-shaped bodies of the latter is prescribed on the former plate elastic body as required. The inventors have found that the use of the jigs fixedly arranged at the intervals allows the application of the conductive paste to be uniform when the end faces of the electronic component element body are pushed in, and has reached the present invention.

Therefore, the present invention provides a method for forming an external electrode conductor of an electronic component, which comprises forming a plurality of strip-shaped external electrode terminals by applying and baking a conductive paste so as to wrap around from one end face to an adjacent side face of the electronic component body. (A) To form an external electrode terminal of an electronic component element, on a plate elastic body having a firm elasticity, a pair of plate strips having elasticity equal to that of the plate elastic body or softer than that if necessary. Fixedly arranged in parallel at a predetermined interval corresponding to the length of the end face, and (b) the opposed surfaces of the pair of fixedly arranged plate strips are inclined surfaces, and straddle the opposed inclined surfaces and the flat plate elastic body. Forming a plurality of continuous grooves, (c) filling the grooves with a conductive paste with a squeegee, pressing the end faces of the electronic component into the grooves, and continuously forming the conductive paste on the end faces and the side surfaces continuous with the end faces. Transfer, can be referred to as outer electrode conductor forming method of the electronic component, characterized in that the coating.

[0012]

In the method of the present invention, (1) by pressing the end face of the electronic component element body against the flat plate elastic body, the conductive paste in the groove formed in the flat plate elastic body is transferred to the end face of the element body. (2) The side surface of the element body is such that the end face of the electronic component element body is not pressed against the flat plate elastic body when the conductive paste is filled in the groove formed continuously across the plate body and the flat plate elastic body. Then, the side surface of the electronic component body pushes the plate body against the soft elastic plate body selected as necessary, and the paste in that portion is transferred to the side surface of the body.

Therefore, the conductive paste is transferred to the end surface and the side surface of the component body with a uniform thickness just by pressing.
The reason why the opposing surfaces of the pair of plate members are inclined is that the electronic component element body can be moved to the left and right to transfer the conductive paste against the soft elasticity. ) Since the element body of the chip component is held by an elastic body having a cylindrical hole used as a holding body, when the component body is inserted into the recess formed by the plate body and the plate elastic body, Even if the groove and the element body are twisted relative to each other, the component element body rotates along with the recess to perform self-alignment operation, and the component element is pushed down until it hits the flat plate elastic body, and after that, Slip occurs between the element and the holding body, so that even if the height of the component body varies to some extent, all the products can be pressed against each other.

[0014]

EXAMPLE FIG. 1 shows a state in which two kinds of combined elastic bodies used in the present example have a conductive paste filling groove formed continuously over both elastic bodies.
3A and 3B are perspective views showing a state where the groove of the combined elastic body of FIG. 1 is filled with a squeegee, which will be described below with reference to these drawings.

First, as shown in FIG. 1, a pair of plate strips 2 having a softer elasticity than the flat elastic body 1 having a hard elasticity are set to the dimensions of the end faces where the external electrode terminals are to be formed. The plates are arranged parallel to each other at a predetermined interval and fixed, and at this time, the opposing surfaces of the strips are inclined surfaces.

Then, a conductive paste 4 is filled with a squeegee 5 into a predetermined groove 3 provided between the plate strip 2 and the flat plate elastic body 1 (FIG. 2).

On the other hand, the chip component body is held in a uniform direction by a holding plate made of an elastic body having a large number of cylindrical holes, and a large number of concave portions constituted by the combined elastic body are collectively provided. The end face of each component body is brought into contact with the flat plate elastic body and then pulled up so that the lower end of each component body is inserted into each recess of the paste filling jig.

At the time of the above insertion, each chip component body is barrel-polished so that the corners of the body are rounded. Therefore, even if the component body has a slight angle deviation with respect to the concave portion to be inserted, A slip occurs between the holding plate and the element body, the angle of the element body is corrected, and the element is inserted following the recess.

Further, when the component body is pushed down and hits the flat plate elastic body, vertical slippage is also caused between the component body and the holding plate. Even if there are variations in the depth direction, the stamp surfaces are aligned with the level of the elastic body as a reference, so the variations can be absorbed.

With the above operation, the predetermined external electrode can be applied accurately.

FIG. 3 (A) is a perspective view of the electronic component element body 6 to which the conductive paste 4 is applied in this manner, and FIG. 3 (B).
Is a side view thereof.

[0022]

As described above, according to the method of the present invention, a large number of chip elements are collectively processed with high accuracy, and the conductive paste for external electrode terminals is uniformly applied to the end surface of the element and the same. It can be applied in a strip shape over the continuous surface.

[Brief description of drawings]

FIG. 1 is a perspective view showing two kinds of combined elastic bodies used in an embodiment of the present invention and a conductive paste filling groove formed over them.

FIG. 2 is a perspective view showing a state in which a conductive paste is filled in a groove with a squeegee in the elastic body of FIG.

FIG. 3 is a perspective view and a side view of an electronic component element body coated with a conductive paste by the method of the present invention.

FIG. 4 is a perspective view showing an example of a conventional method of forming an external electrode terminal using an elastic body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flat elastic body 2 Plate strip 3 Groove 4 Conductive paste 5 Squeegee 6 Electronic component body

Claims (1)

[Claims] 1. A method of forming an external electrode conductor of an electronic component, comprising forming a plurality of strip-shaped external electrode terminals by applying and baking a conductive paste so as to wrap around from one end face of an electronic component element body to an adjacent side face thereof. On a flat elastic body having a firm elasticity, a pair of plate-like bodies having elasticity equal to or softer than that of the flat elastic body is formed on an end surface of the electronic component body for forming external electrode terminals. Fixedly arranged parallel to each other at a predetermined interval corresponding to the length, and (b) facing surfaces of the pair of fixedly arranged plate members are inclined surfaces, and a groove continuous between the opposed inclined surfaces and the flat plate elastic body. (C) Filling these grooves with a conductive paste with a squeegee, pressing the end face of the electronic component into the groove, and transferring and applying the conductive paste continuously to the end face and the side surface connected to it. thing A method for forming an external electrode conductor of an electronic component, comprising: