JP2005111788A - Screen printing plate for precision printing and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form various minute printing patterns in the use of a printing plate by a screen printing method. <P>SOLUTION: A platemaking pattern opening 13 is formed by exposing a sensitive emulsion 12 which is applied to a metal sheet main body 1, positioned in a metal pattern opening 11 formed in the metal sheet main body 1, and a pattern opening 10 obtained by making the opening size of the platemaking pattern opening 13 smaller than that of the metal pattern opening 11 is formed. The metal pattern opening 11 being formed in the metal sheet main body 1, in a manufacturing method of the pattern opening 10, the sensitive emulsion is applied to the metal sheet main body 1 after formation of the metal pattern opening 11 and exposed by a platemaking film having the platemaking pattern opening 13 aligned to the position of the metal pattern opening 11, Thereby the platemaking pattern opening 13 is formed in the metal pattern opening 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention realizes a precise printing pattern when various patterns are formed by using a printing plate by a screen printing method in the configuration of conductors and insulators of various electronic parts such as a printed board and a plasma display body. The present invention relates to a screen printing plate for precision printing that enables printing processing (fine dots... FD) to be performed and a manufacturing method thereof.

Conventionally, it has been performed by screen printing as a method for producing conductors, insulators, and the like of electronic components, which is an important technique for constructing a precise circuit. For example, when a large number of contact areas are arranged and formed at predetermined intervals over the entire operation screen, such as a touch panel screen, screen printing is used for the configuration of a dot spacer having a predetermined height that serves as a partition wall between the contact areas. However, such a touch panel structure is recently arranged on the screen, for example, even if the contact section size corresponding to the size of the fingertip is sufficient as long as the conventional fingertip is pressed. Corresponding to the increase in the amount of information, and in accordance with this, by using the touch pen method instead of pressing the tip of the finger, the interval between the contact sections for pressing touch is becoming narrower.
nothing special

  However, when forming a dot spacer by conventional screen printing, in order to form a contact partition wall with a sufficiently narrow interval, the mesh of the screen mesh itself is gradually expanded by repeated sliding of the squeegee. In addition to this, not only can the interval width fluctuate, but also the ink ejection stability is difficult, and this cannot be used positively. In the case where the metal plate is made of a thin nickel material that hardly expands, a circular opening having a diameter of not more than a certain range, for example, a diameter of 50 μm or less, is formed in the metal plate. This is extremely difficult, and even if it can be made, it is very expensive.

  That is, in order to perform such fine dot processing (FD processing), other than the limited construction method (additive metal), various problems occur in terms of roundness, processing time, yield, etc., and the cost is not high. In addition, blurring occurred during actual printing, and it was difficult to form clear dots. Furthermore, according to the conventional printing method, the height of the dot body or the like in the printed pattern to be formed has to be about half that of the opening diameter, and more than that of the opening diameter. However, it was almost impossible to form a high dot body.

  Therefore, the present invention was created in view of the conventional circumstances as described above. For example, even if the thickness of the metal plate is 20 to 25 μm, an extremely small opening having an opening diameter of 50 μm can be formed. As a dot body to be a printing pattern, a dot having a diameter of 50 μm and a height / thickness sufficiently higher than the opening diameter can be formed, for example, 50 to 75 μm. The purpose is to provide a screen printing plate for precision printing suitable for printing fine dots, etc. that can be managed and used in the same way as an emulsion mask, and the method of manufacturing the same, as it is useful for metal masks. And

In order to solve the above-described problems, the precision printing screen printing plate according to the present invention is a printing plate made of a metal material used for screen printing, and has a metal pattern opening 11 formed in the metal plate body 1. And having a pattern opening 10 in which a plate-making pattern opening 13 is formed by exposure to the photosensitive emulsion 12 applied to the metal plate body 1, and is compared with the opening size of the metal pattern opening 11. On the other hand, in the manufacturing method for manufacturing the screen printing plate for precision printing, the metal pattern opening 11 is formed in the metal plate main body 1. Applying photosensitive emulsion 12 to the metal plate body 1 after forming the metal pattern openings 11 and forming the metal pattern openings 11 and closing them. An emulsion coating step and a plate making pattern opening step in which the plate making pattern opening 13 is exposed in the metal pattern opening 11 by exposure with a plate making film in which the plate making pattern opening 13 is aligned corresponding to the metal pattern opening 11 position. It is characterized by.

In the screen printing plate for precision printing and the manufacturing method thereof according to the present invention configured as described above, the photosensitive emulsion 12 applied to the metal plate body 1 is a rough metal formed in the metal plate body 1 with an opening. The pattern opening 11 is closed, and a dense plate-making pattern opening 13 having a predetermined size is formed in the metal pattern opening 11 by a new plate-making pattern opening process, so that a printing pattern such as a very small size dot body or belt body is formed. K is formed.
The metal plate body 1 itself forms a metal pattern opening 11 that becomes the core of the pattern opening 10, and holds the photosensitive emulsion 12 to form a fine and fine plate-making pattern opening 13 in the photosensitive emulsion 12. The photosensitive emulsion 12 that closes the opening 11 is disposed and formed in the metal pattern opening 11.
Although the photosensitive emulsion 12 is applied and fixed to the metal plate body 1, even if it is damaged or worn by repeated pattern printing and the original shape of the opening shape of the plate-making pattern opening 13 is damaged, it is peeled off and re-applied. The metal pattern opening 11 is regenerated through an emulsion coating process and a plate making pattern opening process.

  As described above, according to the present invention, for example, by forming the dense plate-making pattern opening 13 by the photosensitive emulsion 12 in the metal pattern opening 11 having a rough opening formed in the metal plate, an extremely small opening size is formed. The pattern opening 10 can be formed, for example, a touch panel configuration that requires a configuration of extremely finely spaced dot patterns, and further a printed pattern K that realizes finely spaced phosphor printing for plasma display formation, etc. be able to. In addition, the printed pattern K such as dots and bands formed by coating printing can be formed with a sufficiently high height compared to its size, and can be repeatedly peeled and regenerated, contributing to a reduction in running costs. However, it is possible to manage and use the blurring characteristic of the metal mask as well as the emulsion mask, thereby facilitating maintenance.

  Further, the metal plate main body 1 itself may be formed with a metal pattern opening 11 that becomes the core of the pattern opening 10, which may be considerably larger and rougher than the printing pattern K, so that the accurate opening of the metal pattern opening 11 is possible. The formation is unnecessary, and in that respect, it is easy to manufacture inexpensively. In addition, the metal plate body 1 holds the photosensitive emulsion 12 applied to the metal plate body 1 so that a predetermined fine and fine plate-making pattern opening 13 that forms an opening in the photosensitive emulsion 12 is blocked by a photosensitive emulsion 12 portion that closes the metal pattern opening 11. The printed pattern K that is repeatedly used can be held.

  The photosensitive emulsion 12 applied and fixed to the metal plate body 1 is peeled off even if the original shape of the plate-forming pattern opening 13 in the pattern opening 10 is damaged due to, for example, repeated pattern printing and is damaged. Then, the metal pattern opening 11 can be regenerated by performing the emulsion coating process and the plate making pattern opening process again, which is greatly useful for reducing the running cost.

  Note that the reference numerals added in the means for solving the above-described problems and the effects of the invention are given for easy reference to the parts showing the components shown in the drawings. The present invention is not limited to the structure / shape indicated by the reference numeral.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Reference numeral 1 shown in the figure is a metal plate body, for example, a plate-like nickel material having a thickness of 20 to 25 μm, For example, it is supported in a tension state by the frame 2 corresponding to the printing size for the substrate W such as a work which is a glass plate material serving as a circuit board. The metal plate main body 1 is formed by applying squeegee with a printing ink or other coating agent on the substrate W, for example, a pattern opening corresponding to various printing patterns K, such as a dot body having a small diameter, a band having a small width, and the like. 10 is formed. The metal plate body 1 itself is not limited to being directly supported by the frame 2, but may be a combination structure supported by the frame 2 with a screen mesh interposed.

  The pattern opening 10 is positioned in the metal pattern opening 11 by a photosensitive emulsion 12 formed by coating and forming on the metal plate body 1 and solidifying the metal pattern opening 11 formed in the metal plate body 1 with rough accuracy. The plate-making pattern opening 13 is formed with high accuracy. The opening of the metal pattern opening 11 is configured by a metal pattern opening forming process using a metal mask and using a manufacturing method almost the same as the formation of the pattern opening for the metal plate body 1 as in the prior art. Further, as shown in FIG. 4, the plate making pattern opening 13 is formed by applying a photosensitive emulsion 12 to the metal plate body 1 after the metal pattern opening 11 is formed by a predetermined coating machine C. The metal pattern opening 11 is solidified by blocking (emulsion coating process), and then exposing through a plate-making mask (pattern film) in which a dense print pattern K is formed as an image (plate-making pattern opening process). It is configured to be positioned in the remaining photosensitive emulsion 12 portion. The ratio of the coarse density of the opening size between the metal pattern opening 11 and the plate making pattern opening 13 is relative, and the opening size at the plate making pattern opening 13 corresponds to the printing pattern K. In addition, the metal pattern opening 11 only means that the printed pattern K is rough, and it means only the relative density relationship between the two.

  As shown in FIG. 2, when the printing pattern K is a small-diameter dot body, the opening size of the metal pattern opening 11 is, for example, about 500 μm, and the opening size of the plate-making pattern opening 13 is about 50 μm. is there. Similarly, when the print pattern K is a band having a fine width, as shown in FIG. 3, the opening width size of the metal pattern opening 11 is, for example, about 500 μm, and the opening width size of the plate making pattern opening 13 is about 50 μm. It is formed as. Of course, the opening size of the plate-making pattern opening 13 may be made smaller than this, and any of them can be selected arbitrarily.

  In forming the metal pattern opening 11 in the metal plate body 1 at this time, data for a metal mask to be a core is prepared. When the material is SUS base made of stainless steel, the film data for etching resist is used. In the case of Ni base, which is a nickel material, it is prepared as additive film data, both of which are designed to have a margin of about 20 mm with respect to the design data. The minimum value is about 50 μm, and the processing accuracy is set by the metal mask manufacturing method (etching method or additive method), the thickness of the metal plate body 1 itself, and the like. That is, as shown in FIG. 4, the metal opening width m in the metal mask is determined in consideration of the alignment accuracy and processing accuracy, and the film opening width p in the plate making mask is determined in consideration of the thinning at the time of printing with respect to the design value. It is done.

  Further, the opening width in the film is corrected positively with respect to the design value in consideration of the thickness of the photosensitive emulsion 12, and when the alignment accuracy of the metal mask and the plate making mask is required to be 100 μm or less, for example, An alignment mark that corresponds to the above alignment is prepared separately. As shown in FIG. 5, for example, a circular plate-making alignment mark M <b> 2 in the plate-making mask can be aligned with respect to, for example, a rectangular metal-use alignment mark M <b> 1 in the metal mask. Keep it.

  In FIG. 6, the coating machine C in the emulsion coating process supports the metal plate body 1 after forming the metal pattern opening 11 along the vertical direction by sandwiching the frame 2 with clamps 21 arranged vertically. For example, a viscous photosensitive emulsion is supplied and applied by a bucket 22 that rises in an inclined state on the squeegee printing surface side, and the emulsion film 23 that is fed out sequentially on the printing surface side is applied with the photosensitive emulsion while being applied. I have to do it. Of course, the configuration of the coating machine C is not limited to the direct method using a sheet / film emulsion as shown in this example, but can also be the direct method using an emulsion emulsion, which is selected according to the application and purpose. Of course. In this way, after the metal pattern opening 11 in the metal plate main body 1 is closed by the photosensitive emulsion 12, an image of the print pattern K is formed, and the pattern film aligned with the metal plate main body 1 is passed through. A printing pattern K is formed by exposure, and unnecessary emulsion is removed. In the metal pattern opening 11, a plate-making pattern opening 13 is formed in the photosensitive emulsion 12 portion solidified by exposure.

  Further, the shape of the plate-making pattern opening 13 is not limited to a circular dot body and a belt-like belt as shown in the figure, and various shapes are possible, and these are merely examples.

  Next, in order to explain the use thereof, a squeegee (not shown) is set from above the metal plate main body 1 with respect to the substrate W to be set in a printing section of a screen printing machine (not shown) and carried below the metal plate main body 1. And a predetermined coating agent is applied and printed on the substrate W (see FIG. 1). At this time, the coating agent is pressed by the squeegee through the dense plate-making pattern opening 13 formed by the photosensitive emulsion 12 inside the rough metal pattern opening 11 and applied onto the substrate W, and has a size of, for example, about 50 μm. A printing pattern K such as a fine-diameter dot body or a fine-width band body is formed. The height of the printed pattern K is also about 1.5 to 2 times the opening size, if necessary. .

  If the plate making pattern opening 13 by the photosensitive emulsion 12 is damaged by repeated use coating, etc., only the photosensitive emulsion 12 portion is peeled off, and the pattern opening 10 is reproduced by going through the emulsion coating process and the plate making pattern opening process again. The metal plate body 1 itself may be used repeatedly.

It is a principal part expanded sectional view which shows the best form for implementing this invention. It is a top view containing the one part enlarged view similarly expressed similarly. It is a top view including the one part enlarged view similarly expressed similarly in other embodiment. It is a top view which similarly shows the magnitude | size relationship of a metal opening width and a film opening width, The (a) is a case where it is a rectangle, (b) is a case where it is a circle. It is the principal part top view at the time of the alignment similarly by the alignment mark. It is a schematic side view in an example at the time of emulsion coating similarly forming a screen printing plate.

Explanation of symbols

C: Coating machine W ... Substrate K ... Printing pattern M1 ... Metal alignment mark M2 ... Plate-making alignment mark m ... Metal opening width p ... Film opening width 1 ... Metal plate body 2 ... Frame 10 ... Pattern opening 11 ... Metal pattern opening 12 ... photosensitive emulsion 13 ... Plate making pattern opening 21 ... Clamp 22 ... Bucket 23 ... Emulsion film

Claims (3)

  A printing plate made of a metal material used for screen printing, which is located in a metal pattern opening formed on the metal plate body, and has a pattern opening formed by exposing the photosensitive emulsion applied to the metal plate body. A screen printing plate for precision printing, comprising:   2. The screen printing plate for precision printing according to claim 1, wherein the opening size of the plate-making pattern opening is smaller than the opening size of the metal pattern opening. A metal pattern opening forming process for forming a metal pattern opening in the metal plate body, an emulsion coating process for coating and closing the photosensitive emulsion on the metal plate body after forming the metal pattern opening, and a metal pattern opening. Manufacturing a screen printing plate for precision printing, characterized by comprising a plate-making pattern opening step in which a plate-making pattern opening is formed in the metal pattern opening by exposing with a plate-making film in which the plate-making pattern opening is aligned corresponding to the position Method.

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