JP6999160B2 - Screen plate making method - Google Patents

Description

The present invention relates to a rotary screen printing apparatus using an annular screen plate making and a method for manufacturing the screen plate making, and in particular, a rotary screen printing apparatus using an annular screen plate making suitable for manufacturing wiring cables and the like used in electronic devices. The present invention relates to a method for manufacturing the screen plate making.

A method of providing a wiring board for an electronic device by using a conductive ink for screen printing capable of printing a relatively thick film is known. In addition, a method of giving patterning of electronic parts such as displays by screen printing using various pastes has also been proposed. Although the method using such screen printing is inferior in accuracy to the lithography method, it is said that the process can be simplified and the productivity is excellent.

For example, Patent Document 1 discloses a method of manufacturing an electronic component by screen printing in which a pattern is given by an emulsion on a flat plate screen made of a mesh, and a paste is supplied to the mesh using a squeegee to pattern. Here, the hardness of the patterned emulsion corresponding to a predetermined pattern of the electronic component is adjusted so as not to be deformed, and the pattern of the emulsion can be directly transferred onto the substrate as a pattern consisting of a paste. It is supposed to be.

By the way, in the conventional screen printing apparatus using a flat plate screen plate making, the wiring length of the wiring cable is limited to the plate making size. On the other hand, according to the rotary screen printing apparatus using the annular screen plate making, infinitely long wiring can be formed in principle.

For example, in Patent Document 2, rotary screen printing using a screen steel plate having through holes formed by etching or laser processing on a seamless annular roll made of stainless steel as a screen printing device for manufacturing a secondary battery. The device is disclosed. After stating that if the conventional single-wafer screen plate making is simply connected in a roll shape, joints will occur and the electrode mixture paste cannot be continuously applied to the current collector. We are proposing annular screen plate making by the above-mentioned processing method.

Japanese Unexamined Patent Publication No. 2006-335013 Japanese Unexamined Patent Publication No. 2015-53203

It is very time-consuming and costly to manufacture an annular screen plate by processing a large number of through holes in an annular roll by etching or laser processing. In particular, this problem becomes apparent when trying to obtain a large diameter annular screen plate making.

Furthermore, in addition to applying the paste (solid coating), for patterning the paste for wiring formation, a groove (bank) structure for collecting the paste and shaping it into a pattern shape is provided on the surface of the annular roll. It may also be necessary to form.

The present invention has been made in view of such circumstances, and an object thereof is rotary screen printing using an annular screen plate making suitable for manufacturing a long wiring board such as a wiring cable used in an electronic device. It is an object of the present invention to provide an apparatus and a method for manufacturing the screen plate making.

The rotary screen printing apparatus according to the present invention is a rotary screen printing apparatus using an annular screen plate making, and the screen plate making connects both ends in a longitudinal direction of a strip-shaped sheet body having a plurality of through holes for guiding ink. It is connected as a portion and formed in an annular drum, and is characterized in that the connection portion is provided with a hole for guiding ink onto the connection portion.

According to such an invention, since the annular screen plate making is continuously and uniformly made in the circumferential direction, the long wiring or the like can be made uniform without causing fading or misalignment, and is suitable for manufacturing a long wiring board. ..

In the above invention, the screen plate making is provided with a mask sheet on the annular drum so as to provide a striped groove extending in the circumferential direction, and the screen plate is rotated along the bottom of the striped groove between the mask sheets. It may be characterized in that the through hole is provided in the. According to such an invention, the paste can be uniformly held in the stripe groove, which is suitable for manufacturing a long wiring board.

In the above-described invention, the connection portion may be provided by welding. According to such an invention, long wiring and the like can be made uniform without causing fading or misalignment while reducing the manufacturing cost, and it is suitable for manufacturing a long wiring board.

Further, the method for manufacturing a screen plate making according to the present invention is a method for manufacturing an annular screen plate making of a rotary screen printing apparatus, in which both ends in the longitudinal direction of a strip-shaped sheet body having a plurality of through holes for guiding ink are connected. A drum forming step of connecting as a portion to form an annular drum, an additional machining step of giving a hole to guide ink on the connecting portion to the connecting portion, and a plurality of strip-shaped mask sheets on the annular drum. To provide the through hole so as to orbit along the bottom of the striped groove between the strip-shaped mask sheets, comprising a groove forming step of forming a striped groove extending in the circumferential direction. It is a feature.

According to such an invention, since the annular screen plate making is made continuous and uniform in the circumferential direction, the long wiring and the like can be made uniform without causing fading or misalignment, and the screen plate making suitable for manufacturing a long wiring board can be made. You can give the device.

In the above-described invention, the groove forming step may be characterized in that the strip-shaped mask sheet is attached onto the annular drum and provided. Alternatively, the groove forming step may be characterized in that the mask sheet master given so as to cover the peripheral surface of the annular drum is etched to give the strip-shaped sheet body. According to such an invention, it is possible to provide a screen plate making device suitable for manufacturing a long wiring board by making the long wiring or the like uniform without causing fading or misalignment while reducing the manufacturing cost.

In the above invention, the drum forming step may be characterized in that the connection portion is provided by welding. According to such an invention, it is possible to obtain an annular screen plate making capable of making long wiring or the like uniform without causing fading or misalignment while reducing the manufacturing cost, and screen plate making suitable for manufacturing a long wiring board can be obtained. You can give the device.

It is a perspective view which shows a part of the manufacturing method of the annular screen plate making by an Example of this invention. It is an enlarged view of the connection part D which shows a part of the manufacturing method of the annular screen plate making by an Example of this invention. It is a side view which shows a part of the manufacturing method of the annular screen plate making by an Example of this invention. It is a perspective view which shows a part of the manufacturing method of the annular screen plate making by an Example of this invention. It is an enlarged perspective view (partial sectional view) of the manufactured annular screen plate making. It is a perspective view which shows a part of the manufacturing method of the annular screen plate making by another Example of this invention.

Hereinafter, the details of the method for manufacturing the annular screen plate making used in the rotary screen printing apparatus according to one embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, in manufacturing an annular screen plate making, first, a through hole 2 for guiding ink in screen printing is formed in a strip-shaped sheet body 8, and this is formed in an annular drum 10. Drum formation step).

Since the sheet body 8 is used as a screen plate making, for example, a metal plate made of a nickel alloy or stainless steel having a thickness of 10 to 50 μm may be provided with a through hole 2 having an inner diameter of 20 μm. The sheet body 8 in which such a through hole 2 is formed can be formed by chemical etching on a metal plate or electroplating. The sheet body 8 is curved in the longitudinal direction thereof, and both ends thereof are abutted against each other and welded to form an annular drum 10. In order to perform uniform joining, the through hole 2 is formed while avoiding the connection portion D including the vicinity of the connection surface which is easily affected by heat due to welding. The connection portion D is, for example, a distance of about 10 mm from the connection surface, that is, a width of about 20 mm across both sides of the connection surface. It is preferable to use laser welding, electron beam welding, or the like for welding to form the annular drum 10.

Subsequently, as shown in FIG. 2, a through hole 2 for guiding the ink is additionally machined in the connection portion D (additional machining step).

The annular drum 10 after welding has a through hole 2 formed so as to avoid the connecting portion D as described above (see FIG. 2A). Therefore, a hole is formed in the connection portion D to form a through hole 2 (see FIG. 2B). For such hole processing, for example, a laser processing machine can be used. In this way, by forming the through hole 2 in the connection portion D as in the other portions, the ink can be guided on the connection portion D as well.

Subsequently, as shown in FIGS. 3 to 5, a mask sheet 12 is attached on the annular drum 10 to form a striped groove 22 extending in the circumferential direction (groove forming step).

Specifically, as shown in FIG. 3, the master of the mask sheet 12 is attached to the outer periphery of the annular drum 10. To do this, first, a pipe having an outer shape that substantially matches the inner diameter of the annular drum 10 is inserted inside the annular drum 10 to prevent deformation, and the mask sheet 12 is formed along the outer peripheral surface of the annular drum 10. A metal plate, which is a master, is wrapped around and attached with an adhesive or the like to cover the entire outer periphery of the annular drum 10. The thickness of the mask sheet 12 can be, for example, 50 to 150 μm. In particular, as shown in FIG. 3B, the end portion of the mask sheet 12 becomes a seam, but it is welded or filled with an adhesive so as not to form a gap in the seam.

As shown in FIG. 4A, the surface and end surface of the master of the mask sheet 12 attached to the outer periphery of the annular drum 10 after removing the deformation prevention pipe, and the inner surface and end surface of the annular drum 10. A positive resist solution is applied to all of them and dried to form a resist film 14.

As shown in FIG. 4B, the surface portion of the resist film 14 corresponding to the position where groove processing is required on the master plate of the mask sheet 12 is irradiated with light, and this is developed and removed by light irradiation. The resist film 14 of the portion 21 is removed.

Further, as shown in FIG. 4C, the mask sheet 12 is immersed in a chemical etching solution to etch only the portion corresponding to the removed portion 21 to form the stripe groove 22 extending in the circumferential direction. At this time, there is a thin layer of adhesive between the mask sheet 12 and the annular drum 10, which slows down the etching rate. Therefore, it is advisable to use this to adjust the etching time so that the annular drum 10 is not etched. After etching, the resist film 14 is removed by immersing it in an alkaline stripping solution.

As a result, as shown in FIG. 5, an annular drum 10 having a mask sheet 12 on which the striped groove 22 was formed was obtained. Further, the through hole 2 is also formed in the connection portion D of the annular drum 10, and is uniformly formed so as to continuously circulate along the bottom portion of the stripe groove 22 including the connection portion D. That is, such an annular drum 10 can be used as an annular screen plate making used in a rotary screen printing apparatus.

In particular, in the annular screen plate making using the annular drum 10, although the annular screen plate having the connection portion D, the through holes 2 can be continuously and uniformly arranged in the circumferential direction. As a result, the long wiring or the like can be printed uniformly without causing fading or misalignment, which is suitable for manufacturing a long wiring board. Further, since the through hole 2 is uniformly formed so as to circulate along the bottom of the stripe groove 22, the paste can be uniformly held in the stripe groove 22, which is suitable for manufacturing a long wiring board. Further, since the through hole 2 is formed by a flat plate except for the connection portion D, the cost can be reduced as compared with processing the through hole on the entire circumference of the annular roll, and even a large diameter annular screen plate making is compared. Can be manufactured at low cost.

As shown in FIG. 6, the groove forming step described above may be performed by attaching a strip-shaped mask sheet 12a without etching. That is, a plurality of mask sheets 12a are attached to the outer periphery of the annular drum 10 at intervals from each other, and are arranged in parallel with each other so as to form the stripe groove 22. This also makes it possible to obtain the same annular screen plate making as described above.

At the time of actual pattern formation, a conductive paste is put inside the annular screen plate making and a squeegee is placed, and the squeegee is placed on a horizontally placed sheet. Conductive paste by applying a load with a squeegee to bring the annular screen plate making into pressure contact with the sheet and moving the annular screen plate horizontally while rotating it, or by moving the sheet horizontally while rotating the annular screen plate making. Can be printed.

Although the sheet is used as the base material of the wiring board here, it can also be used as a plate making for screen offset printing by using the sheet as a transfer body for transferring the sheet to another base material.

Although the examples according to the present invention and the modifications based on the present invention have been described above, the present invention is not necessarily limited to this, and those skilled in the art deviate from the gist of the present invention or the scope of the attached claims. Without doing so, various alternative and modified examples could be found.

2 Through hole 10 Circular drum 12 Mask sheet 22 Striped groove D Connection

Claims (4)

A method for manufacturing annular screen plate making for rotary screen printing equipment.
A drum forming step of connecting both ends in the longitudinal direction of a strip-shaped sheet body having a plurality of through holes for guiding ink as connecting portions to form an annular drum.
An additional machining step that gives the connection part a hole for guiding ink onto the connection part, and
A groove forming step of feeding a plurality of strip-shaped mask sheets parallel to each other on the annular drum to form a striped groove extending in the circumferential direction is included.
A method for producing a screen plate, which comprises providing the through hole so as to orbit along the bottom of the stripe groove between the strip-shaped mask sheets. The method for manufacturing a screen plate according to claim 1 , wherein the groove forming step is provided by attaching the strip-shaped mask sheet onto the annular drum. The method for manufacturing a screen plate according to claim 2 , wherein the groove forming step etches a mask sheet master given so as to cover the peripheral surface of the annular drum to give the strip-shaped sheet body. The method for manufacturing a screen plate according to one of claims 1 to 3 , wherein the drum forming step provides the connection portion by welding.

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