JPH06328873A - Screen printing plate - Google Patents

Abstract

PURPOSE:To provide a uniform paste printing film thickness by a method wherein bridge girder-like struts are provided in the lower space of a mesh part in a screen printing plate consisting of the mesh part and a base part, which is thicker than the mesh part, in the surroundings of the mesh part. CONSTITUTION:In a screen printing plate consisting of a mesh part 1 and a base part 2, which is thicker than the mesh part, in the surroundings of the mesh part, bridge girder-like struts 3 are provided in the space below the mesh part 1. When the printing is performed with paste and the screen printing plate, the bridge girder-like struts 3 provided in the space below the mesh part serve as supports, resulting in preventing the mesh part 1 from being deformed toward recesses by the pressure of a squeegee. Accordingly, even in an article, the uniformity of the thickness of which influences on the electric characteristics, such as the internal electrodes of a multilayer ceramic capacitor produced by screen printing, a highly accurate product having small variation of characteristics one easily be produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing plate for screen printing which has a uniform printed film thickness.

[0002]

2. Description of the Related Art As shown in FIGS. 6 and 7, a conventional screen printing plate comprises a mesh portion 1 and a base portion 2 thicker than the surrounding mesh portion. Generally, in printing of paste, ink or the like (hereinafter referred to as paste) by a screen printing plate, the paste 4 is moved by pressing the squeegee 5 against the plate as shown in FIG. Printing is performed by extruding onto the surface of the printing medium 6 through the hole 1a.

[0003]

However, in the conventional printing plate, the mesh portion 1 is pressed by the squeegee 5 from above during the printing process (hereinafter referred to as squeegee pressure).
As shown in FIG. 8, the center portion is deformed in the direction of depression. Therefore, the paste 4 printed on the surface of the printing medium 6 is
As shown in (3), the central portion was dented, and a difference in thickness occurred between the central portion and the end portion, and it was not possible to obtain a uniform thickness.

Therefore, for example, in the case where the thickness uniformity affects the electrical characteristics, such as the internal electrodes of a monolithic ceramic capacitor formed by screen printing,
Due to this difference in thickness, it has been difficult to manufacture highly accurate products with small variations in characteristics. Further, due to this difference in thickness, it is difficult to reduce the thickness of the internal electrode, and it is difficult to reduce the size and increase the capacity. Therefore, an object of the present invention is to provide a printing plate for screen printing, which can obtain a paste printing film thickness having a uniform thickness.

[0005]

In order to achieve the above object, the present invention provides a screen printing plate comprising a mesh portion and a base portion thicker than the surrounding mesh portion, and a space portion below the mesh portion. The screen printing plate is characterized in that bridge columns are provided on the.

[0006]

According to the present invention, the bridge girder-like columns provided in the space below the mesh portion serve as a support against the squeegee pressure during the printing process, and can prevent the mesh portion from deforming in the dent direction.

[0007]

1 is a plan view of a screen printing plate according to an embodiment of the present invention, and FIG. 2 is a sectional view of the same. Figure 1,
As shown in FIG. 2, a mesh portion 1 (a portion surrounded by a dotted line in FIG. 1) and a base portion 2 thicker than the surrounding mesh portion 2
And a bridge girder-shaped support 3 provided in the space surrounded by the base 2 below the mesh. When the holes 1a formed in the mesh portion are arranged in two rows, the bridge girder-like columns 3 are provided in a portion other than the holes 1a between the rows.

1 and 2 are enlarged views of a part of the screen printing plate. For example, the mesh portion 1 is 1.0 mm × 0.5 mm, and the mesh hole 1a is 5 mm.
The size of the column 3 is 0 μm × 50 μm, and the column 3 is 20 μm × 20 μm. Thousands of mesh parts 1 are arranged to form one screen printing plate.

This printing plate was prepared by the electrohoming method. Specifically, as shown in FIG. 5, after forming a predetermined pattern (portion of the hole 1a of the mesh portion 1) on the conductor 10 with an insulator (resist),
Electroplating and removing the insulator with a solution
The plating film 11 of the layer is formed. Further, another pattern (the mesh portion 1 excluding the portion corresponding to the pillar 3) is similarly formed on the first-layer plated film 11 by an insulator.
Lower space), electroplating is performed, the insulator is removed with a solution, and the second-layer plating film 12 is formed. These first-layer and second-layer plating films are peeled off at once to produce the above-mentioned screen printing plate. As a result, the support pillars 3 can be formed at the same time when the second-layer plating film 12 for forming the space below the mesh portion 1 is formed. Of course, stanchion 3
May be created separately. The bridge girder-like support is for supporting the mesh portion, and its shape, position, and number are not particularly limited.

When paste is printed using this screen printing plate, as shown in FIG. 3, since the bridge girder-like support 3 serves as a support, the mesh portion 1 is dented by the squeegee pressure of the squeegee 5. Since it does not deform in the direction,
It is possible to print with a uniform thickness. Therefore, the paste 4 printed on the surface of the non-printed body 6 can have a uniform thickness as shown in FIG.

Further, the present invention is characterized in that a bridge girder-like support is provided in the space below the mesh, and the manufacturing method and the like are not particularly limited, and various conventionally known methods are available. The present invention can be applied to the plate for screen printing.

[0012]

As described above, when the screen printing plate of the present invention is used to print the paste,
Since the bridge girder-shaped columns provided in the space below the mesh part serve as a support, it is possible to prevent the mesh part from being deformed in the dent direction due to the squeegee pressure, so that the paste can be printed with a uniform thickness. . For this reason, it is possible to easily manufacture a high-precision product with a small variation in characteristics, even if the electrical characteristics are affected by the uniformity of thickness, such as the internal electrodes of a monolithic ceramic capacitor formed by screen printing. You can Further, by making the thickness uniform, it is possible to further thin the internal electrode, and it is possible to achieve miniaturization and high capacity.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a screen printing plate according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a cross-sectional view at the time of printing with the screen printing plate of the present invention.

FIG. 4 is a cross-sectional view of a paste obtained by the screen printing plate of the present invention.

FIG. 5 is a cross-sectional view for explaining a method for producing a screen printing plate according to the present invention.

FIG. 6 is a plan view of a conventional screen printing plate.

7 is a cross-sectional view taken along line XX of FIG.

FIG. 8 is a cross-sectional view during printing with a conventional screen printing plate.

FIG. 9 is a cross-sectional view of a paste obtained by a conventional screen printing plate.

[Explanation of symbols]

 1 Mesh part 2 Base part 3 Support

Claims (1)

[Claims] 1. A screen printing plate comprising a mesh portion and a base portion thicker than the surrounding mesh portion,
A printing plate for screen printing, characterized in that bridge columns are provided in the space below the mesh.