JPH03162995A - Mesh for screen printing and production thereof - Google Patents

Abstract

PURPOSE:To facilitate a machining and to impart a degree of freedom to a wire width-thickness ratio by producing all layers by an electroforming method. CONSTITUTION:On the surface of an electroforming matrix 5, a resist film 8 of a mesh pattern is formed. A primary electrodeposited layer 2 is formed by a mat electroforming method on parts of the surface of the electroforming matrix 5 which are not covered with the resist film 8. A secondary electrodeposited layer 3 is integrally formed by a gloss electroforming method on the surface of the primary electrodeposited layer 2. A teriary electrodeposited layer 4 is integrally formed by a mat electroforming method on the surface of the secondary electrodeposited layer 3. Lastly, the electroformed mesh product made of the primary, secondary, and teriary electroformed layers 2-4 is released from the matrix 5. By changing the thickness of the resist film 8 at the time of the electroforming, a degree of freedom can be imparted to the width-to- thickness ratio of a metal wire 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mesh used in screen printing and a method for manufacturing the same.

[Conventional technology]

As a mesh for screen printing, for example, as shown in FIG. 3, which shows an enlarged cross-sectional structure of a part of the copper mesh, the surface of a copper wire 9 having a circular cross section is covered with bright nickel lO,
Furthermore, there is a known product having a linear cross-sectional structure in which the surface of glossy Nisokel 10 is covered with matte Nisokel 11 (documents unknown).

This copper mesh is manufactured by the etching method and electroforming method as follows. The process order is shown in Figure 4 Tal to fhl.
Shown below.

First, as shown in FIG. 4 fat, a corrosion-resistant film 13 with a desired mesh pattern is formed on the surface of the glass plate 12, and then the surface of the glass plate l2 that is not covered with the corrosion-resistant film 13 is corroded with hydrofluoric acid ( Figure 4(b)). Then, the fourth
After conducting conductive treatment with palladium chloride 14 as shown in FIG. 4(d), the corrosion-resistant film 13 is removed (FIG. 4(d)). Next, electroless copper plating is performed to form a mesh-like copper wire 9 (FIG. 4(e)).

After copper coating, the copper wire 9 is peeled off from the glass plate 13 (FIG. 4(f)), and a glossy Nigel 10 is vertically electroformed on the surface of the copper wire 9 (FIG. 4(GL)). Matte nickel 11 is electroformed on the surface to obtain a complete product with a plate thickness C of, for example, about 35 μm, as shown in FIG. 4 (hl).

The screen mesh product plated with glossy nickel 10 has excellent strength, and the surface of the matte nickel 11 is wrinkled to make it easier to adhere a printing pattern made of photosensitive resin, increasing its adhesion strength. It has the advantage of being able to

[Problem to be solved by the invention]

However, the screen mesh described above requires a large number of steps to obtain the mesh-like copper wire 9, and since the copper wire 9 is thin, the technique for peeling it from the glass plate 12 requires experience and skill. It is necessary and has poor processability. In addition, for this type of mesh, it is desirable to make the interval (width) A between adjacent ribs large and the width B of the ribs as small as possible in order to improve the passage of ink into the mesh, but the above manufacturing method does not allow for this. There is a limit to reducing the width B of the rib. In other words, since the entire surface of the copper wire 9 is vertically electroformed to be coated with glossy nickel 10 and then coated with matte nickel 1l, there is a limit to how small the width B of the rib can be. Therefore, there is a drawback that there is no degree of freedom in the ratio of the width B and thickness C of the rib.

The present invention has been made to solve these problems, and is a mesh for screen printing that can be manufactured easily by electroforming and has a degree of freedom in line width and thickness ratio. The present invention also aims to provide a method for manufacturing the same.

[Means to solve the problem]

In the screen printing mesh of the present invention, the cross section of the metal wire forming the mensch is comprised of a primary electrodeposition layer formed by matte electroforming and a secondary electrodeposition layer integrally formed on the surface of the primary electrodeposition layer by gloss electroforming. It consists of three layers: a secondary electrodeposition layer and a tertiary electrodeposition layer integrally formed on the surface of the secondary electrodeposition layer by matte electroforming.

A resist film with a Soshu pattern is formed. Next, a primary electrodeposition layer is formed by matte electroforming on the surface of the electroformed matrix that is not covered with the resist film, and then a secondary electrodeposition layer is integrally formed on the surface of the primary electrodeposition layer by gloss electroforming. Then, a tertiary electrodeposition layer is integrally formed on the surface of the secondary electrodeposition layer by matte electroforming. Finally, the mesh electroformed product consisting of the primary, secondary and tertiary electrodeposited layers is peeled off from the matrix.

Examples of electroforming include Nisokel electroforming or Nisokeru-cobalt alloy electroforming.

[Effect]

In such cases, by changing the thickness of the resist film during electroforming, a degree of freedom can be given to the ratio of the width and thickness of the metal wire.

Further, the process that requires experience and skill, such as the conventional process of peeling off thin copper wires as described above, can be omitted, and processing can be made that much easier.

〔Effect of the invention〕

According to the mesh for screen printing of the present invention, it is possible to easily process precision items by electroforming, and the strength can be ensured by the secondary electrodeposition layer formed by glossy electroforming, and the primary electrodeposition layer formed by matte electroforming. The surface of the layer or tertiary electrodeposition layer can also be wrinkled to increase the adhesion strength of the printing pattern.

Further, according to the manufacturing method of the present invention, by simply changing the thickness of the resist film during electroforming, it is possible to have a degree of freedom in the ratio of metal line width and thickness, and to adjust the thickness and mesh size. A wide variety of different meshes can be easily obtained.

〔Example〕

In FIG. 1, the mesh for screen printing according to the present invention has a cross-sectional structure of the metal wire 1, which includes a primary electrodeposition layer 2 formed by matte electroforming, and a glossy electrodeposition layer 2 on the surface of the primary electrodeposition layer 2. It consists of three layers: a secondary electrodeposition layer 3 integrally formed by casting, and a tertiary electrodeposition layer 4 integrally formed on the surface of the secondary electrodeposition layer 3 by matte electroforming. For example, the width B of the metal wire 1 is 10μ, and the thickness C is 1
It is 5μ.

Figures 2 (al to f) show the sequence of steps to obtain a mesh product for screen printing by nickel electroforming.

First, as shown in FIG. 2(a), a photoresist 6 is uniformly applied to the surface of the electroforming mother mold 5 and dried.

Next, as shown in FIG. 2(b), a positive type desired mesh pattern film 7 is closely adhered to the resist 6, and is subjected to baking, development, and drying processes to form a second film.
Resist film 8 with a mesh pattern as shown in Figure (C)
form. Next, the matrix 5 on which the resist film 8 has been formed is transferred to an electrodeposition bath, and primary electroforming is performed with matte Nisokel, so that the matrix 5 is covered with the resist film 8 as shown in FIG. 2 (dl). A primary electrodeposited layer 2 is formed on the surface where there is no surface.

After the primary electroforming, the surface of the primary electrodeposition layer 2 is subjected to secondary electroforming with bright nickel to integrally form the secondary electrodeposition layer 3 as shown in FIG. As a brightening agent, butynediol, sodium benzenesulfonate, or the like is added in an appropriate amount.

After the secondary electroforming, tertiary electroforming is performed on the surface of the secondary electrodeposition layer 3 using the same matte Nisokel as in the case of the primary electroforming to integrally form the tertiary electrodeposition layer 4 as shown in Figure 2 (fl). do.

Finally, by peeling off the primary, secondary, and tertiary electrodeposited layers 2, 3, and 4 from the matrix 5, a screen mesh product as shown in FIG. 1 can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an enlarged perspective view of a part of the screen mesh product of the present invention, and FIGS. 2(a) to ff) show manufacturing process diagrams for obtaining the screen mesh product by the method of the present invention. Fig. 3 is an enlarged perspective view of a part of a conventional screen mesh product, and Fig. 4 f8+ (hl) shows the manufacturing process diagram. Deposition layer, 3... Secondary electrodeposition layer, 4... Tertiary electrodeposition layer, 5... Electroforming matrix, 8... Resist film. Soshu metal wire,

Claims (1)

[Claims] 1. Metal wire (1) forming mesh for screen printing
The cross section of the primary electrodeposited layer (2) was formed by matte electroforming.
), a secondary electrodeposition layer (3) integrally formed on the surface of the primary electrodeposition layer (2) by gloss electroforming, and a secondary electrodeposition layer (3) integrally formed on the surface of the secondary electrodeposition layer (3) by matte electroforming. A mesh for screen printing characterized by comprising three layers of a tertiary electrodeposited layer (4). 2. Forming a mesh pattern resist film (8) on the surface of the electroforming mother mold (5), and applying matte electroforming to the surface of the electroforming mother mold (5) that is not covered with the resist film (8). a step of forming a primary electrodeposition layer (2) by a process of forming a secondary electrodeposition layer (3) integrally on the surface of the primary electrodeposition layer (2) by gloss electroforming; Step 3) of integrally forming the tertiary electrodeposited layer (4) on the surface of the layer (2, 3, 4) by matte electroforming;
) from an electroformed matrix (5); and a method for producing a screen printing mesh.