JP2001239767A - Screen plate for printing and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve solvent resistance and water resistance by maintaining a high accuracy pattern in a high accuracy of a printing screen using an emulsion material. SOLUTION: A screen plate for printing comprises a screen mesh 51, a pattern forming material mounted on the mesh to form a print pattern 55, and a surface layer vapor-deposited on surfaces of the mesh and the pattern forming material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen plate used for a screen printing machine and a method for manufacturing the same.

[0002]

2. Description of the Related Art A screen plate used in a conventional screen printing machine uses a dairy material to form a screen printing pattern. A conventional screen plate is made by coating a milk material on a steel screen mesh or a Tetron (registered trademark) or nylon screen mesh, irradiating light through a mask pattern, and exposing to light. A pattern for screen printing is formed by developing and drying the milk material.

[0003]

When a pattern is formed using a dairy material on a screen plate, there is a problem that it is difficult to form a high-precision fine pattern. In addition, dairy materials have poor solvent resistance, and there is a problem in that when a screen plate is washed with a solvent, a printed pattern is easily broken. Also, dairy materials have a problem of low water resistance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a printing screen plate capable of maintaining a high-precision printing pattern and having improved solvent resistance and water resistance, and a method of manufacturing the same. The purpose is to obtain.

[0005]

According to the present invention, there is provided a printing screen plate comprising: a screen mesh; a pattern forming material attached to the screen mesh to form a printing pattern; and a screen mesh and the pattern forming material. And a surface layer deposited on the surface.

[0006] The surface layer is a metal surface layer formed by sputter deposition.

[0007] The pattern forming material is characterized in that it is present not in the outer peripheral portion but in the central portion of the screen mesh.

According to a method of manufacturing a printing screen plate according to the present invention, a step of forming a printing pattern by using a pattern forming material on a screen mesh, and a step of forming a printing pattern include a screen mesh and a pattern forming material. Forming a surface layer by evaporation on the surface of (1).

[0009] The step of forming the surface layer includes a step of forming a metal surface layer by sputter deposition.

[0010] The step of forming the printing pattern includes a step of removing a pattern forming material from an outer peripheral portion of the screen mesh.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a flowchart showing a method for manufacturing a printing screen plate of the present invention. FIG. 2 is a diagram showing the process of manufacturing the printing screen plate of the present invention. FIG. 3 is an enlarged sectional view of the printing screen plate of the present invention.

In step S11, the screen mesh 51 is stretched on the screen frame 53. The screen mesh 51 may be made of a metal such as steel, or may be made of a chemical fiber such as tetron or nylon. The normal tension or the bias tension is used for the tension. Next, in S21, a printing pattern is formed. In the printing pattern forming step S21, first, in S12, a photosensitive milk material 54 is applied to the entire screen from the back side. Next, in S13, light is irradiated using a mask pattern (not shown) to expose the photosensitive milk material 54. Next, in S14, the photosensitive milk material 54 is developed to generate a printing pattern.

FIG. 2A shows a state in which the screen mesh 51 is laid on the screen frame 53 in S11. FIG. 2B shows a state in which the photosensitive milk material 54 is coated in S12.
FIG. 2C is a cross-sectional view taken along the line AA of FIG.
FIG. 2D shows a state in which the photosensitive milk material 54 has been developed in S14 and a print pattern 55 has been generated.

Next, in S22, a metal surface layer is formed on the surface of the screen plate (the entire front and back sides). In the surface layer forming step S22, first, in S15, the screen plate is put into a vapor deposition device, and a metal thin film is formed on the entire surface by vapor deposition. Here, deposition refers to evaporating a metal in a vacuum to form a film. For example, it means that copper or nickel is evaporated in a vacuum in a vapor deposition apparatus, and nickel or copper is attached to the surface of the screen plate. Further, sputter deposition by sputtering, which is a kind of vapor deposition, may be performed. Here, sputter deposition refers to deposition by sputtering. What is sputtering?
While introducing an inert gas into a vacuum, a discharge is generated between a metal such as nickel or copper and the screen plate for printing, and atoms and molecules are knocked out of the surface of the metal with accelerated inert gas ions to print. A method of depositing a metal film on a screen stencil. This sputtering deposition has the following advantages when compared with general deposition: (1) Strong adhesion. (2) A uniform film can be obtained. On the other hand, (1) the device becomes complicated. (2) Inert gas must be exhausted. And the like.

FIG. 3 is an enlarged cross-sectional view of the printing screen plate on which the deposition process of S15 has been performed. A metal surface layer 56 made of nickel or copper is formed on the entire surface of the screen mesh 51 and the photosensitive milk material 54. Metal surface layer 56
Is, for example, 1 μm to 2 μm. The metal surface layer 56 has a role of firmly bonding the screen mesh 51 woven in the vertical and horizontal directions. In addition, since the metal surface layer 56 is also formed on the inner wall of the print pattern 55, the separation of the ink passing through the print pattern 55 is improved. Since the metal surface layer 56 is also formed on the front and back surfaces of the photosensitive milk material 54, a printed pattern having improved strength and hardness can be obtained, similarly to the metal mask. That is, the metal surface layer 5
Since 6 covers the entire screen, the pattern of the print pattern 55 does not collapse and a highly accurate pattern can be maintained. In addition, the presence of the metal surface layer 56 on the surface prevents the milk material from being exposed, thereby improving solvent resistance and water resistance.

Considering that the size of the print pattern 55 is reduced by the thickness W of the metal surface layer 56, the width M of the print pattern 55 is finally adjusted to a desired width.
It is desirable to form the mask pattern so that the pattern width L of the mask pattern that exposes the photosensitive milk material 54 is L = M + 2W. That is, the mask pattern for exposure has a large width L in advance by the width (2 W) of the metal surface layer 56, so that the width M of the print pattern 55 formed after vapor deposition is formed as expected.

Next, in step S16, the printing screen plate is plated. This plating process includes electroless plating,
Alternatively, electrolytic plating can be used. Both plating processes may be performed. Alternatively, the plating process in S16 may be omitted. When performing the plating process, it is desirable to increase the width of the mask pattern in advance in consideration of the width of the plating deposited by the plating process.

Embodiment 2 FIG. FIG. 4 shows S13 and S14.
Shows a case where the photosensitive milk material 54 has been removed from the outer peripheral portion 57 of the screen plate. FIG.
(A) is a perspective view, and (b) of FIG. 4 is a BB cross-sectional view of (a) of FIG. FIG. 4 shows that the photosensitive milk material 54 is removed from the outer peripheral portion 57 by exposure and development, and the outer peripheral portion 5 is removed.
FIG. 7 shows a case where the screen mesh 51 is exposed. As shown in FIG. 4, by removing the photosensitive milk material 54 from the outer peripheral portion 57, the mesh of the outer peripheral portion 57 is subjected to the deposition process in S15. When vapor deposition is performed on the mesh, the mesh woven vertically and horizontally is fixed. However, when vapor deposition is performed on the mesh, metal is applied to the entire surface and back of the photosensitive milk material 54. The screen has elasticity more than the case where the surface layer 56 is formed, and the separation of the screen printing plate can be improved. That is, according to the configuration of FIG. 4, it is possible to provide a screen plate having both the characteristics of the metal mask and the characteristics of the mask using the screen mesh.

A feature of the present invention is that a metal surface layer is formed by vapor deposition. It is also conceivable to form the metal surface layer by plating without using evaporation, but the plating process is carried out in a liquid called plating solution regardless of whether electroplating or electroless plating is used. And there is a possibility that uniformity of plating thickness may not be obtained. Also, the plating solution enters between the screen meshes, destroying the printed pattern,
The holes through which ink passes may be crushed. In addition, there is a problem that the plating becomes thick. In contrast to the plating process, the vapor deposition process is a method of forming a film by evaporating a metal, and thus has an effect that a thinner and more uniform film can be obtained as compared with a case where the plating process is performed by dipping in a plating solution. . If sputter deposition is used, a film having a stronger bond with the screen mesh 51 and the photosensitive milk material 54 can be obtained.

[0020]

As described above, according to the present invention, a metal surface layer is formed on the surface of a screen plate by vapor deposition or sputter vapor deposition. It is possible to provide a printing screen plate having improved properties and water resistance.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a method for manufacturing a printing screen plate of the present invention.

FIG. 2 is an explanatory view of a printing pattern forming step.

FIG. 3 is an enlarged sectional view of a printing screen plate after vapor deposition.

FIG. 4 is a state diagram of a printing pattern forming step according to another example.

[Explanation of symbols]

51 screen mesh, 53 screen frame, 54
Photosensitive milk material, 55 printing patterns, 56 metal surface layer,
57 Outer periphery.

Continued on the front page (72) Inventor Isao Sakuraba 1-2-7 Tekkodori, Urayasu-shi, Chiba F-term in the Micro System Co., Ltd. (Reference) 2H084 AA30 BB07 BB08 BB13 BB20 CC10 2H096 AA19 EA00 GA00 HA27 JA04 2H114 AB04 AB09 AB10 AB17 BA01 DA04 DA56 DA61 EA01 EA02 FA11 GA11 GA33

Claims (6)

[Claims] 1. A screen mesh, a pattern forming material attached to the screen mesh and forming a print pattern, and a surface layer deposited on a surface of the screen mesh and the pattern forming material. Screen version for printing. 2. The printing screen plate according to claim 1, wherein the surface layer is a metal surface layer formed by sputter deposition. 3. The printing screen plate according to claim 1, wherein the pattern forming material is present not at the outer periphery but at the center of the screen mesh. 4. A step of forming a printing pattern using a pattern forming material on a screen mesh and a step of forming a printing pattern, and then forming a surface layer on the surface of the screen mesh and the pattern forming material by vapor deposition. And a process for producing a screen plate for printing. 5. The method according to claim 4, wherein the step of forming the surface layer includes the step of forming a metal surface layer by sputter deposition. 6. The step of forming the printing pattern,
5. The method for manufacturing a printing screen plate according to claim 4, further comprising a step of removing a pattern forming material from an outer peripheral portion of the screen mesh.