JP2007301724A - Screen printing method for thin line and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To find out screen printing equipment, with which thinner lines can be printed to a material to be printed. <P>SOLUTION: A screen printing method and equipment for transferring paint 1 through the paint passing part of a screen plate 4 is constituted by rubbing the paint 1 on the screen plate 4 with a squeegee 6 in the state that the screen plate 4 having the paint passing part consisting of a shape to print, under the condition that an elastic body 3 is laid beneath a material 7 to be printed, is put upon the material 7 to be printed. Printing pressure given with the squeegee 6 is applied through the screen plate 4 to the material 7 to be printed placed on the elastic body 3, resulting in realizing a state to compress the elastic body 3 with the material 7 to be printed and further resulting in realizing a state to push up the screen plate 4 and the squeegee 6 to an opposite direction by the material 7 to be printed so as to bring the squeegee 6, the screen plate 4 and the material 7 to be printed into close contact with one another and to strengthen the transferring force of the paint 1 to the material 7 to be printed and to realize the sure transferring of the paint 1 to the material 7 to be printed even in the case of a thin line. Thus, the clear printing of the thin line can be realized. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a screen printing technique.

In the method of screen printing, usually, a screen plate having a paint passage portion having a shape to be printed is polymerized and placed on an object to be printed, and the paint of the screen plate is rubbed against the screen plate by a squeegee. A screen printing method is used in which a coating material is transferred to the substrate through a passage portion.
As a general method of screen printing, for example
However, it does not enable thin lines. JP 2000-71422 A

In screen printing, it was necessary to find a method and an apparatus for transferring finer and finer lines to a printed material clearly and reliably.

The present invention relates to a screen printing apparatus, wherein a screen plate having a paint passage portion having a shape to be printed is polymerized on a printing material, and the paint is rubbed against the screen plate with a squeegee to pass through the paint passage portion of the screen plate. When transferring the coating material to the printing material, means is used for printing by placing an elastic body under the printing material.

Conventionally, in screen printing where printing was performed with a fine line width of 100 micrometers, printing was performed under the same conditions by placing an elastic body under the printed material.
The elastic body was made of silicon sheet, and the thickness of the elastic body was 0.3 mm and the hardness was 50 degrees. In screen printing without using an elastic body, it was 100 micrometers. However, when printing was performed in the same manner using an elastic body, it was possible to print clear fine lines of 80 micrometers.

The effect of making it possible to print thinner lines is considered as follows.
During printing, the squeegee printing pressure is applied to the substrate through the screen plate. At that time, the printing pressure on the printing material is concentrated on the contact portion between the squeegee and the screen plate. Also, the printing pressure by the squeegee is applied to the printed material placed on the elastic body through the screen plate, and the elastic body is compressed by the printed material, and the elastic body tries to return to the original state, and the printed material The screen plate and the squeegee are pushed up in the opposite directions, and the substrate to be printed is superimposed on the screen plate.
Therefore, while the squeegee, the screen plate and the substrate are in close contact, the squeegee moves and the paint is surely moved to the paint passage part of the screen plate, and the squeegee, the screen plate and the substrate are in close contact, The force of transferring and adhering the paint to the non-printed material is increased, and the paint is reliably transferred to the printed material even in the case of a thin line. Therefore, it is considered that fine lines can be clearly printed.

When a screen plate having a paint passage portion having a shape to be printed is polymerized on a printing material, and the paint is transferred to the printing material through the paint passage portion of the screen plate by rubbing the coating material on the screen plate with a squeegee, An apparatus for a screen printing method is characterized in that printing is performed by placing an elastic body under the printing material.

FIG. 1 is an explanatory diagram of the most common screen printing apparatus.
The screen plate 4 has a paint passage portion that forms a shape to be printed. The screen plate 4 is in the form of a sheet, and is made of a polymer material, metal or non-ferrous metal, and various combinations.
The screen plate 4 is superposed and superposed on the substrate 7 and the paint 3 is rubbed against the screen plate 4 by a squeegee 6 to transfer the paint to the printed material 7 through the paint passage portion of the screen plate 4. In such a screen printing apparatus, the substrate 7 is held on the table 2. The present embodiment is characterized in that a thin elastic body 3 is disposed on the table 2 and a substrate 7 is placed on the elastic body 3. There is a case where a plate is provided on the elastic body 3 without directly placing the substrate 7 on the elastic body 3 and the substrate 7 is fixed on the plate. Or it can be said that it is a screen printing method which prints by laying an elastic body under the substrate.
The paint 1 is in the form of a paste. For example, in the electronic industry, a conductive paste containing a solder component is used. The paint can be anything.
The table 2 may be an alignment table.
The alignment table is a table having XY-angle movement.
In this embodiment, the substrate 7 is disposed on the alignment table, but the type of the table 2 on which the substrate 7 is disposed or installed is not limited to this. Anything can be used as long as the substrate can be placed.
The elastic body 3 may be directly fixed and arranged on the alignment table.
In the experiment, the material of the elastic body 7 is a polymer material and silicon rubber is used. However, the material is not limited to the material of the comb.
During the experiment, the elastic body was tested with a thickness of 0.3 mm, but the thickness is not limited.
The elastic body has a hardness of 50 degrees, but this hardness is not limited.

In this way, the substrate 7 is placed on the elastic body 3, or the elastic body 3 is laid under the substrate 7, the screen plate 4 is placed on the substrate 7, and the squeegee 6 is used to paste the paste 1 on the screen plate 4. The paste 1 is transferred from the paint passage portion of the screen plate 4 to the printing material 7 with heavy weight on the paint passage portion. The elastic body 3 slightly contracts due to the force applied to the substrate 7 through the screen plate 4 by the squeegee 6. Therefore, it is considered that the elastic body 3 generates the applied force in the opposite direction, and the squeegee 6, the screen plate 4, and the substrate 7 are in close contact with each other, and the paste-like paint is surely transferred and adhered to the substrate. Is done.
When screen printing is performed by providing the elastic body 3 under the printing material 7 in this way, the paste 1 is also clearly visible on the printing material 7 as compared with the printing printed without the conventional elastic material. Is transferred more finely.

The squeegee 6 is numerically or linearly controlled in the vertical and horizontal directions by a mechanical device.
In the separation of the screen plate 4 and the substrate 7, there is already an apparatus for separating the screen plate 4 and the substrate 7 by moving the screen plate 4 or moving the substrate 7.

In other words, the screen plate 4 having the paint passage portion that forms the shape to be printed is polymerized on the substrate,
When the coating material 1 is transferred to the printing material 7 through the coating material passage portion of the screen plate 4 by rubbing the coating material onto the screen plate 4 with the squeegee 6, the printing material 7 is moved to the elastic body 3. A screen printing method and apparatus characterized by being printed on top.

It can be used for screen printing that requires fine lines.

Explanatory drawing of the apparatus of the screen printing method of the present invention

Explanation of symbols

1.
Paste 2.
Table 3.
Elastic body 4.
4. Screen version
Support part 6.
Squeegee 7.
Substrate

Claims (2)

When a screen plate having a paint passage portion having a shape to be printed is polymerized on a printing material, and the paint is transferred to the printing material through the paint passage portion of the screen plate by rubbing the coating material on the screen plate with a squeegee, A screen printing method, wherein printing is performed by placing an elastic body under the printing material. A screen printing apparatus according to the screen printing method according to claim 1.