JP2840666B2 - Screen printing mesh and method of manufacturing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mesh used for screen printing, and a method for producing the same.

[Conventional technology]

As a screen printing mesh, for example, the surface of a copper wire 9 having a circular cross section is covered with bright nickel 10 as shown in FIG. Those having a line cross-sectional structure covered with dull nickel 11 are known (the literature is unknown).

This copper mesh is manufactured by an etching method and an electroforming method as follows. The order of the steps is shown in FIGS. 4 (a) to (h).

First, as shown in FIG. 4 (a), a corrosion-resistant film 13 having a desired mesh pattern is formed on the surface of the glass plate 12, and the surface of the glass plate 12 which is not covered with the corrosion-resistant film 13 is corroded with hydrofluoric acid. (FIG. 4 (b)). Next, as shown in FIG. 4 (c), after conducting the conductive treatment with palladium chloride 14, the corrosion resistant film 13 is removed (FIG. 4 (d)). Then
Electroless copper plating is performed to form a mesh-shaped copper wire 9 (FIG. 4 (e)). After copper plating, copper wire 9 from glass plate 13
(FIG. 4 (f)), bright nickel 10 is vertically electroformed on the surface of the copper wire 9 (FIG. 4 (g)), and matt nickel 11 is further electroformed on the bright nickel 10 surface. Then, as shown in FIG. 4 (h), a finished product having a plate thickness C of, for example, about 35 μm is obtained. Screen mesh products plated with bright nickel 10 in this way have excellent strength.In addition, the surface of the matte nickel 11 has a grain on it, which makes it easy to attach a pattern for printing with photosensitive resin, and increases its density strength. Has the advantage of being able to

[Problems to be solved by the invention]

However, in the screen mesh described above, since the number of steps required to obtain the mesh-shaped copper wire 9 is large, and the thickness of the copper wire 9 is small, the technique of peeling the copper wire 9 from the glass plate 12 requires experience and skill. Necessary and poor in workability. In addition, in this type of mesh, it is desirable that the interval (mesh width) A between adjacent ribs is large and the width B of the ribs is as small as possible in order to improve the ink flow to the mesh. There is a limit in reducing the width B of the rib. In other words, there is a limit in reducing the width B of the ribs in order to plate the bright nickel 10 on the entire surface of the copper wire 9 by vertical electroforming, and further, to plate the matte nickel 11.
Therefore, there is a disadvantage that the ratio of the width B to the thickness C of the rib is not flexible.

The present invention has been made to solve such problems, and by manufacturing all by electroforming, simplification of processing,
An object of the present invention is to provide a screen printing mesh capable of giving a degree of freedom in a ratio of a line width to a thickness, and a manufacturing method thereof.

[Means for solving the problem]

In the screen printing mesh of the present invention, the cross section of the metal wire forming the mesh is formed by a primary electrodeposition layer formed by matte electroforming and a secondary electrode formed integrally by gloss electroforming on the surface of the primary electrodeposition layer. The secondary electrodeposition layer and the tertiary electrodeposition layer integrally formed on the surface of the secondary electrodeposition layer by matte electroforming are used.

Further, according to the present invention, when manufacturing such a mesh for screen printing, first, a resist film having a mesh pattern is formed on the surface of the electroformed matrix. Next, the primary electrodeposition layer is formed by matte electroforming on the surface that is not covered with the resist film of the electroforming master mold, and then the secondary electrodeposition layer is integrally formed by gloss electroforming on the surface of the primary electrodeposition layer. Then, a tertiary electrodeposition layer is integrally formed on the surface of the secondary electrodeposition layer by matte electroforming. Finally, the mesh electroformed product including the primary, secondary, and tertiary electrodeposited layers is separated from the matrix.

Electroforming includes nickel electroforming or nickel-cobalt alloy electroforming.

[Action]

In such a case, by changing the thickness of the resist film at the time of electroforming, the degree of freedom of the ratio of the width to the thickness of the metal wire can be given.

In addition, the steps requiring experience and skill, such as the above-described conventional stripping of a copper wire in a thin state, can be omitted, and processing can be facilitated accordingly.

〔The invention's effect〕

According to the mesh for screen printing of the present invention, it is possible to easily process a precise one by electroforming, and to secure the strength by a secondary electrodeposition layer by gloss electroforming, and to perform primary electrodeposition by matte electroforming. The surface of the layer or the tertiary electrodeposition layer may be grained to increase the adhesion strength of the printing pattern.

Further, according to the manufacturing method of the present invention, only by changing the thickness of the resist film at the time of electroforming, it is possible to have a degree of freedom in the ratio of the metal line width to the thickness, and the thickness and the size of the mesh are adjusted. Many different meshes can be easily obtained.

〔Example〕

In FIG. 1, a screen printing mesh according to the present invention has a primary electrodeposition layer 2 formed by matte electroforming, and a glossy electroforming A secondary electrodeposition layer 3 integrally formed by
It consists of three layers of 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 10 μ, and the thickness C is 15 μ.

2 (a) to 2 (f) show a process order until a screen printing mesh product is obtained by nickel electroforming.

First, as shown in FIG. 2A, a photoresist 6 is uniformly applied on the surface of the electroformed mold 5 and dried. Next, as shown in FIG. 2 (b), a desired positive type mesh pattern film 7 is brought into close contact with the resist 6 and subjected to baking, development and drying processes, as shown in FIG. 2 (c). A resist film 8 having a mesh pattern is formed. Next, the matrix 5 on which the resist film 8 is formed is transferred to an electrodeposition tank, subjected to primary electroforming with matte nickel, and covered with the resist film 8 of the matrix 5 as shown in FIG. 2 (d). The primary electrodeposition layer 2 is formed on the surface that has not been formed.

After the primary electroforming, the surface of the primary electrodeposition layer 2 is subjected to a secondary electroforming with bright nickel, and as shown in FIG.
Are integrally formed. As a brightener, butinediol or sodium benzenesulfonate is added in an appropriate amount.

After the secondary electroforming, the surface of the secondary electrodeposition layer 3 is subjected to the same matte nickel tertiary electroforming as in the case of the primary electroforming to integrally form the tertiary electrodeposition layer 4 as shown in FIG. 2 (f). I do.

Finally, the primary, secondary, and tertiary electrodeposited layers 2, 3, and 4 are separated from the matrix 5 to obtain a screen mesh product as shown in FIG.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a part of the screen mesh product of the present invention, and FIGS. 2 (a) to 2 (f) are views showing the manufacturing process until a screen mesh product is obtained by the method of the present invention. FIG. 3 is an enlarged perspective view of a part of a conventional screen mesh product, and FIGS. 4 (a) to 4 (h) show manufacturing process diagrams thereof. DESCRIPTION OF SYMBOLS 1 ... Metal wire of a screen mesh, 2 ... Primary electrodeposition layer, 3 ... Secondary electrodeposition layer, 4 ... Tertiary electrodeposition layer, 5 ... Electroforming master mold, 8 ... Resist film.

Claims (2)

(57) [Claims] 1. A primary electrodeposition layer (2) in which a cross section of a metal wire (1) forming a mesh for screen printing is formed by matte electroforming, and a glossy electroforming is performed on a surface of the primary electrodeposition layer (2). And a tertiary electrodeposition layer (4) integrally formed by matte electroforming on the surface of the secondary electrodeposition layer (3). Mesh for screen printing. 2. A step of forming a mesh-patterned resist film (8) on the surface of the electroformed mold (5), and a step of forming a resist pattern on the surface of the electroformed mold (5) that is not covered with the resist film (8). A step of forming a primary electrodeposition layer (2) by gloss electroforming; a step of integrally forming a secondary electrodeposition layer (3) by gloss electroforming on the surface of the primary electrodeposition layer (2); A step of integrally forming a tertiary electrodeposition layer (4) on the surface of the adhesion layer (3) by matte electroforming; and forming the primary, secondary and tertiary electrodeposition layers (2.3.4) in an electroforming mold ( 5) A method for producing a mesh for screen printing, comprising the steps of: