KR100829413B1 - Printer - Google Patents

Abstract

A printing apparatus is disclosed. The printing apparatus of the present invention comprises: a work table in which a plurality of air injection holes through which air for causing a substrate to float on a plate surface is formed; And a porous air guide member coupled to each of the plurality of air injection holes to pass air toward the substrate. According to the present invention, it is possible to float the substrate more effectively even with a smaller amount of air than in the prior art, and to reduce the occurrence of vortices, thereby preventing particle problems caused by vortices.

Printing device, work table, work stage, porous air guide member, substrate, floating

Description

Print Device {Printer}

1A and 1B are diagrams showing two types of structures of color filter layers printed with R, G, and B patterns, respectively.

2 is a schematic structural diagram of a printing apparatus according to an embodiment of the present invention.

3 is a perspective view of the work table shown in FIG. 2.

4 is a lateral cut back perspective view of FIG. 3.

FIG. 5 is a partial cross-sectional view taken along the line VV of FIG. 3.

FIG. 6 is a perspective view of the work stage shown in FIG. 2. FIG.

7 is a partial cross-sectional view taken along the line VII-VII of FIG. 6.

* Explanation of symbols for the main parts of the drawings

10: gravure roll 10a: groove

12: support 20: doctor blade

22: knife 30: dispenser

40: blanket roll 50: work stage

60: lower base 70: work table

71: upper plate 72: lower plate

73: air sprayer 74: compartment

75: air supply line 76: porous air guide member

77: air exhaust hole 78: groove

The present invention relates to a printing apparatus, and more particularly, it is possible to float the substrate more effectively even with a smaller amount of air than in the past, as well as to reduce the occurrence of vortices and to prevent particle problems due to vortex generation. Relates to a device.

Recently, as the electronic display industry has developed rapidly among the semiconductor industry, flat panel displays (FPDs) have started to appear. Flat panel displays are commonly used as monitors for TVs or computers, or as display devices for devices such as mobile phones, PDAs, and digital cameras. Types of flat panel displays include liquid crystal displays (LCDs), plasma display panels (PDPs), and organic light emitting diodes (OLEDs).

A flat panel display typically has a color filter layer for realizing color. A color filter having a black matrix for preventing light from leaking to areas other than the image display area and degrading the image quality of the display device is formed. It is provided.

A typical flat panel display having such a color filter is the LCD described above. The LCD includes a thin film transistor substrate on which a thin film transistor is formed, a color filter substrate on which a color filter layer is formed, and a liquid crystal filled between these substrates.

In the color filter layer, as shown in Figs. 1A and 1B showing two types of color filter layers in which R, G, and B patterns are printed, respectively, R (Red), G (Green), and B (Blue) are typically used. A pixel having a pigment of the pattern is formed. Each pixel may consist of sub-pixels having R, G, and B, but in general, each pixel has one pigment.

In forming the color filter layer, as shown in FIG. 1A, the R, G, and B patterns may be regularly arranged in a line such that the R, G, and B patterns are arranged in the same column, respectively, or as shown in FIG. 1B. Similarly, R, G, and B patterns may be repeatedly arranged in the same row. The difference in resolution can be realized in various ways according to the arrangement of the R, G, and B patterns.

Such a color filter layer can be produced by various methods, for example, dyeing, printing, electrodeposition, pigment dispersion. STN (Super Twisted Nematic) LCD, which is one of the conventional passive matrix methods, mainly produces color filter layers by dyeing, printing, and adhesive methods, but it is an active matrix method that has excellent elaboration, good reproducibility, and is applicable to large-area liquid crystals. In TFT (Thin Film Transistor) LCD, pigment dispersion method is mainly used.

In the pigment dispersion method, a color filter layer is produced by forming a pattern of photosensitive color resist by a general photo process. That is, the color filter layer is completed by applying a photosensitive color resist on a substrate, irradiating light using a mask, and then applying a developer to form a desired pattern.

As such, a photo process is required to form a color filter by the pigment dispersion method, and this photo process causes a problem that the process is not only complicated but also expensive to manufacture. Furthermore, the process is further complicated since the photo process must be repeated three times in order to form pixels corresponding to the dyes of the R, G, and B patterns.

Recently, a method of using the printing method in the TFT LCD field has been proposed to overcome the problems of the pigment dispersion method.

The printing method includes a gravure filled gravure and a corresponding roll to form a color resist pattern of the dye on the substrate by the action of a roll, and then another color color resist by another roll. To form sequentially. If such a printing method can be put into practical use, the process of manufacturing color filter layers by printing R, G, and B patterns on a substrate can be performed more quickly and effectively. It is not. Therefore, research and development on such a device is actively in progress.

On the other hand, in forming R, G, and B patterns on a substrate by using a printing method, the substrate is transferred to a place where a printing operation is substantially performed (this is called a work stage) or the substrate is floated on the work stage. I need to make it work.

Therefore, when transferring the substrate to the work stage or floating the substrate on the work stage, a method of first loading the substrate into the work stage using a lift pin may be considered. In this case, the work stage may be considered. Holes must be formed on the substrate, which can cause problems with the substrate around the holes when the roll is transferred to the substrate. For the same reason, it is difficult to install a roller or a conveyor on the work stage. In particular, when the substrate is transferred through a roller or a conveyor due to the characteristics of the substrate formed of a glass material, scratches may occur on the substrate, or particle defects may be caused by friction.

Therefore, in consideration of the expected problem, a method of adsorbing the substrate to transfer the substrate to the work stage or floating the substrate on the work stage may be considered. However, with the recent increase in preference for large TVs of 40 inches or larger and large monitors of 20 inches or larger, manufacturers of LCDs have a width of 2 meters (m) in width and length to produce wider substrates. Research on increasing the size of the substrate to the above 8 generations is being conducted, and practical commercialization is expected soon. As such, a large number of problems are required to adsorb such a large-area substrate in the prior art and transport it to the work stage or to float it on the work stage. May occur.

That is, for example, in a state where the substrate is raised to a certain height in a work table, the vacuum adsorption member absorbs the substrate and transfers the substrate to the work stage, and in the work stage, in order to float the substrate, the substrate is placed on the work table or the work stage. Forming a plurality of air injection holes for injecting air to float the air, and supplying individual air to each of these air injection holes may be used, in this case, a large amount of air consumption is required to injure the substrate Therefore, there is a problem that the occurrence of the vortex is increased, the generation of the vortex has a problem that can cause a problem of particles.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printing apparatus which can float a substrate more effectively even with a smaller amount of air than in the prior art, as well as reduce the occurrence of vortices to prevent particle problems caused by vortices.

According to the present invention, there is provided a work table in which a plurality of air injection holes are formed, through which air for causing a substrate to float on a plate surface is formed; And a porous air guide member coupled to each of the plurality of air injection holes to pass air toward the substrate.

Here, the work table may include an upper and a lower plate that are in contact with each other, a plurality of partitions for partitioning the air injection holes in a plurality of groups (units) is formed on the bottom of the upper plate, the plurality of Each of the compartments of the air supply line may be disposed.

The partition may be formed by a depression recessed in a direction from the bottom of the upper plate toward the upper surface.

The air supply line may be provided in plural, and one end of each of the air supply lines may be exposed to the outside of the lower plate, and the other end may be disposed in a corresponding compartment through the lower plate.

The printing apparatus of this embodiment includes an air supply unit for supplying air to the plurality of air supply lines; And a control unit for selectively controlling the flow of air provided to corresponding partitions through the plurality of air supply lines.

The control unit may control the air supply unit to supply air sequentially from the partitions in which the air injection holes positioned at the side where the substrate enters are arranged.

The porous air guide member, the insertion shaft portion is inserted into the air injection hole; And a head portion connected to the insertion shaft portion and having a relatively large cross-sectional diameter compared to the insertion shaft portion and disposed in the depression area.

The upper surface of the insertion shaft portion may be disposed lower than the upper surface of the upper plate.

The work table may further include at least one air exhaust hole that is ejected toward the substrate from the plurality of air injection holes and exhausts the air flowing back by hitting the substrate.

The air exhaust hole may be disposed between the air injection holes.

The air exhaust hole may be provided in plural in the groove recessed downward from the upper surface of the work table.

The upper plate may be made of aluminum, and the lower plate may be made of stainless steel.

A work stage may further include a work stage on which at least one of R (Red), G (Green), and B (Blue) patterns is printed, on the substrate transferred from the work table. The work stage may include a plurality of air injection holes through which air for injecting the substrate onto the plate surface may be formed, and each of the plurality of air injection holes may include a porous air guide member through which air is directed toward the substrate. Can be combined.

On the other hand, the object is, according to the present invention, a work stage (work stage) is formed with a plurality of air injection holes are sprayed with air for floating the substrate on the plate surface; And it is also achieved by a printing apparatus comprising a porous air guide member coupled to each of the plurality of air injection holes to pass air toward the substrate.

Here, the work stage may be a stone platform.

The plurality of air injection holes to which the porous air guide member is coupled may be interconnected by a tiled air line.

A plurality of partitions may be formed on a bottom surface of the work stage to divide the air injection holes into a plurality of groups, and an air supply line may be disposed in each of the plurality of partitions, and the partition may include the workpiece. It may be formed by a depression recessed in a direction from the bottom of the stage toward the top surface.

The porous air guide member, the insertion shaft portion is inserted into the air injection hole; And a head portion connected to the insertion shaft portion and having a relatively large cross-sectional diameter compared to the insertion shaft portion and disposed in the depression area.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

2 is a schematic structural diagram of a printing apparatus according to an embodiment of the present invention.

As shown in this figure, the printing apparatus according to an embodiment of the present invention, the gravure roll (10, Gravure roll), the outer surface of the gravure roll 10 R (Red), G (Green), B ( Blue) Dispenser 30 for applying color resist (color ink, color pigment) and doctor blade 20 for removing unnecessary color resist among color resists applied on the outer surface of gravure roll 10. ) And a blanket roll 40 for printing R, G, and B patterns onto the surface of the color filter substrate (hereinafter, referred to as substrate G) by receiving R, G, and B color resists from the gravure roll 10. The substrate G is placed on a work stage 50 where a print job of at least one of the R, G, and B patterns of the roll G, the substrate G is performed, and the upper surface of the work stage 50 are formed. A work table 70 to be transferred is provided, and a lower base 60 supporting them is provided.

The gravure roll 10 serves to transfer any color resist selected from R, G, and B color resists to the outer surface of the blanket roll 40. Thus, the gravure roll 10 and the blanket roll 40 have substantially similar volumes. The gravure roll 10 is rotatably mounted in a corresponding position by a pair of left and right support parts 12 fixed to the lower base 60 and standing upright. The gravure roll 10 may be adjusted to some extent of the eccentricity and the horizontal axis in the support 12.

For reference, as described above with reference to FIGS. 1A and 1B, in printing the R, G, and B patterns on the substrate G, the R, G, and B patterns may not be simultaneously printed on the substrate G through one printing apparatus. Do not. That is, in order to print the R, G, and B patterns on the substrate G, at least three printing apparatuses are provided, and each of the R, G, and B patterns is selected and printed on the substrate G by the three printing apparatuses. .

Therefore, the dispenser 30 which first applies the color resist to the outer surface of the gravure roll 10 by the dispenser 30 has only one color resist selected from the R, G, and B color resists on the outer surface of the gravure roll 10. Will be applied. Expressed easily, the dispenser 30 applies only ink of any color selected from red, green and blue to the outer surface of the gravure roll 10.

Although not shown in detail, the outer surface of the gravure roll 10 is formed with a concave-convex pattern substantially covered with color resist (coated). At this time, the uneven pattern may be embossed or engraved. In the embossed form, the color resist is applied to the outer surface of the protruding convex and concave portion (not shown) to transfer to the blanket roll 40. In the engraved form, the color resist is applied to the inside of the recessed recess 10a. Transition to (40).

However, the blanket roll 40 receives the color resist from the outer surface of the gravure roll 10 and retransfers (prints) it onto the substrate G to form R, G, and B patterns having a shape as shown in FIGS. 1A and 1B. In this case, in order to maintain uniform thicknesses of the R, G, and B patterns from the surface of the substrate G, it may be advantageous that the uneven pattern formed on the outer surface of the gravure roll 10 has a negative shape.

When any of the color resists selected from R, G, and B color resists is applied to the outer surface of the gravure roll 10 by the dispenser 30, as shown in the enlarged portion B of FIG. The color resist should be applied only to the groove portion 10a. However, when the dispenser 30 applies the color resist to the outer surface of the gravure roll 10, it is difficult to apply the color resist at a time such that the color resist is selectively received only in the recess portion 10a of the substantially engraved shape.

Therefore, when the dispenser 30 applies the color resist to the outer surface of the gravure roll 10, the color resist is widely spread on the outer surface of the gravure roll 10 and applied, and when the application is completed, the recess 10a of the intaglio shape is completed. By removing the unnecessary color resist applied to the remaining surface 10b, the color resist is finally contained only in the recess 10a. To this end, the doctor blade 20 is provided in the periphery of the gravure roll 10 to remove unnecessary color resist.

The doctor blade 20 includes a knife holder 21 and a knife 22 coupled to the knife holder 21. The knife holder 21 has a structure that can be easily attached and detached at a predetermined position of the support 12 in this embodiment in a one-touch form. The knife 22 has a length substantially similar to the length of the gravure roll 10, and is inclined with respect to the outer surface of the gravure roll 10 in a state where the tip thereof is in contact with the outer surface of the gravure roll 10. It scratches the outer surface.

In this way, since the tip of the knife 22 is in contact with the outer surface of the gravure roll 10, when the color resist is applied to the outer surface of the rotating gravure roll 10, the recess 22 of the intaglio shape by the knife 22 The color resist applied to the remaining surface 10b except for may be naturally removed. Therefore, finally, the color resist can be accommodated only in the recess 10a (see FIG. 2B).

As described above, the dispenser 30 serves to apply color resist to the outer surface of the gravure roll 10. The dispenser 30 is provided to be movable along the longitudinal direction of the gravure roll 10 as well as to be able to be lifted or folded in one direction at the corresponding position. Therefore, the coating efficiency of the color resist can be improved, and interference with the surrounding structure can be avoided.

The blanket roll 40 is rotated by transferring the color resist applied in the groove portion 10a formed on the outer surface of the gravure roll 10, and more particularly, on the outer surface of the gravure roll 10. And a substantially printing roll for printing the R, G, and B patterns as shown in FIG. 1B.

On the outer surface of the blanket roll 40, a sheet to which the color resist is transferred from the gravure roll 10 is wound. Of course, the sheet used more than the number of times the appropriate limit has to be replaced, so the blanket roll 40 is further provided with a sheet replacement means (not shown) for easy replacement of the sheet. The sheet replacement means serves to provide a certain tension to the sheet so that the sheet can be easily replaced, while the sheet is unfolded and stretched and wound on the outer surface of the blanket roll 40. Sheet replacement means is provided on one surface (40a, see Fig. 2) cut from the blanket roll (40).

The blanket roll 40 must be accessible and spaced apart from the gravure roll 10 as well as able to rotate on the top surface of the substrate G loaded on the work stage 50. To this end, both sides of the blanket roll 40 on the side rails 61 of the lower base 60 to move the blanket roll 40 in a linear direction, as well as to move the rotary roll to rotate the blanket roll 40 at the corresponding position ( 42). The structure for moving the blanket roll 40 in the moving rotation part 42 may be, for example, a linear motion or the like capable of precise control.

On the other hand, the work stage 50 is a place where the printing operation of the R, G, B pattern on the substrate G proceeds, and the work table 70 serves to transfer the substrate G to the work stage 50. In charge.

As described above, since the process operation using the 8th generation substrate G having a width and a width of 2 m or more in the roots is performed, it is difficult to transfer the substrate G by a simple adsorption method. . Thus, as an alternative, the substrate G must be transported after the substrate G is floated.

However, in the process of transferring the substrate G, as described above, a large amount of air should not be consumed or unnecessary particle problems should be caused. Therefore, in the present embodiment, by adopting the following structure, it is possible to float the substrate G more effectively even with a small amount of air and to reduce the occurrence of vortices to prevent particle problems caused by vortices.

Hereinafter, for convenience of description, the structure of the work table 70 will be described first, and then the description of the work stage 50 will be added.

3 is a perspective view of the work table shown in FIG. 2, FIG. 4 is a lateral cut back perspective view of FIG. 3, FIG. 5 is a partial cross-sectional view taken along the line VV of FIG. 3, and FIG. 6 is shown in FIG. 2. Perspective view of a finished work stage.

As shown in these figures, the work table 70 that floats and transports the substrate G to the work stage 50 is formed of a substantially rectangular plate. This is because the substrate G is generally formed in a rectangular plate-like body, so that the shape of the work table 70 may be appropriately changed according to the shape of the substrate G. FIG.

This work table 70 has upper and lower plates 71 and 72 in contact with each other. The upper plate 71 may be made of aluminum, and the lower plate 72 may be made of stainless steel. However, the present invention is not limited thereto, and the material of the upper and lower plates 71 and 72 may be appropriately selected and changed.

On the plate surface of the upper plate 71, a plurality of air injection holes 73 through which air for floating the substrate G is formed are formed. These air injection holes 73 are formed through the upper plate 71 so as to reach the bottom surface from the upper surface of the upper plate 71, and are evenly disposed over the entire area of the upper surface of the upper plate 71.

Porous air guide members 76 for distributing and guiding air toward the substrate G are coupled to the air injection holes 73. The porous air guide member 76 is made of a material in which a number of fine pores are formed on the surface thereof, and the porous air guide member 76 receives air for floating the substrate G through the air injection hole 73. Although spraying, it serves to prevent the air injection hole 73 is left unnecessarily drilled.

If the air is simply injected through the air injection holes 73 without the porous air guide member 76, the consumption of air for the substrate G is unnecessarily increased. However, as in the present embodiment, when the porous air guide member 76 is provided in each of the air injection holes 73, it is possible to reduce the consumption of air. In addition, since the direction of the air toward the substrate G can be properly dispersed, the efficiency for floating the substrate G can be increased.

The porous air guide member 76 is connected to the insertion shaft portion 76a and the insertion shaft portion 76a inserted into the air injection hole 73, as shown in an enlarged view of FIG. Compared with the relatively large cross-sectional diameter and includes a head portion 76b disposed in the area of the depression portion 74, which is a partition portion 74 to be described later.

Therefore, in the case of FIG. 4, which shows the rear surface of the upper plate 71 in a perspective view, the head portion of the porous air guide member 76 having a larger size than the area of each air injection hole 73 in the area of each air injection hole 73. Only 76b is observed. The upper surface of the insertion shaft portion 76a is disposed lower than the upper surface of the upper plate 71. However, the upper surface of the insertion shaft portion 76a may have substantially the same height as the upper surface of the upper plate 71.

A plurality of partitions 74 are formed on the bottom of the upper plate 71 to partition the air injection holes 73 into a plurality of groups. The plurality of partitions 74 are formed by the depressions 74 recessed in the direction from the bottom of the top plate 71 toward the top surface. Referring to the drawings, in the present embodiment, 15 partitions 74 are formed in different sizes. However, the size and number of partitions 74 may also be appropriately changed.

Each compartment 74 is arranged with an air supply line 75 for supplying individual air to the air injection holes (73) located in the compartment (74). Therefore, the air supply line 75 is provided in plural as the number of partitions (74). At this time, one end of each of the air supply line 75 is exposed to the outside of the lower plate 72 and the other end is disposed in the partition portion 74 through the lower plate 72.

The printing apparatus of this embodiment includes an air supply unit (not shown) for supplying air to the plurality of air supply lines 75, and the air provided to the partitions 74 through the plurality of air supply lines 75. A control unit (not shown) for selectively controlling the flow is further provided.

In this case, the controller may supply air to all of the air supply lines 75 to allow the substrate G to float on the plate 70. However, in this case, it may be somewhat insufficient to substantially reduce the air consumption.

Accordingly, in the present embodiment, the air supply unit is controlled to sequentially supply air from the partitions 74 in which the air injection holes 73 positioned on the side where the substrate G enters through the control unit. That is, when the substrate G tries to enter the plate 70 of the work table 70 in a separate transfer device, air is supplied to the partitions 74 located in front of the side where the substrate G enters. Air is injected into the air injection holes 73 positioned in the compartment 74, and then air is injected into the air injection holes 73 in the rear to gradually float the air to float the substrate G. The consumption of can be controlled effectively. Of course, even when the substrate G is transferred from the work table 70 to the upper surface of the work stage 50, the air injection method of each air injection hole 73 may be controlled by the controller.

On the other hand, the air hit the substrate (G) in the process of the air is injected into the air injection holes (73) to rise the substrate (G) on the upper surface of the plate 70 flows back to the upper surface of the plate (70). At this time, if the air flowing back is not properly exhausted, the injected air may be concentrated toward the center of the large-area substrate G and the center may be convex, such that deformation may occur in the substrate G.

Therefore, in the printing apparatus of the present embodiment, the plate 70 is ejected toward the substrate G from the plurality of air injection holes 73, and then the plurality of air exhaust holes for exhausting the air flowing back against the substrate G ( 77 is further formed.

At this time, the air exhaust holes 77 may be disposed between the air injection holes 73, in the present embodiment, the upper surface of the work table 70, that is, downward from the upper surface of the upper plate 71 Air exhaust holes 77 are formed in the recessed groove 78.

6 is a perspective view of the work stage shown in FIG. 2, and FIG. 7 is a partial cross-sectional view taken along the line VII-VII of FIG. 6.

In the above description, the porous air guide member 76 and its various configurations have been described a state in which the work table 70 is applied.

However, the above-described configurations, i.e., the porous air guide member 76 and its various configurations, are at least as long as at least one of the actual R, G, and B patterns with respect to the substrate G, as shown in FIGS. It can also be applied to the work stage 50 where the printing operation of the pattern is performed.

However, while the work table 70 is made of upper and lower plates 71 and 72 formed of a metal material, respectively, the work stage 50 may be made of a stone plate instead of a metal material. When used as a work stage 50 as a stone slab, strict dimensional control is possible, and there will be an advantage of not causing particle defects due to friction with the substrate G. The schematic structure of the work stage 50 is briefly described as follows.

6 and 7, a tiled air line 50a is formed on the surface of the work stage 50. An air floating hole 53 is formed on an intersection point at which the tiled air line 50a crosses each other or the tiled air line 50a, and the porous air guide member 76 is formed in each air floating hole 53. Is combined.

Like the work table 70, a plurality of partitions 54 partitioning the air injection holes 53 into a plurality of groups on the bottom of the work stage 50 to which the porous air guide member 76 is coupled. Is formed. The partition 54 is formed by the depression 54 recessed in the direction from the bottom of the work stage 50 to the top surface as described above. In each of the partitions 54, air supply lines 55 individually controlled by the above-described control unit are disposed.

On the other hand, the substrate G is transferred to the work stage 50 in the injured state without contacting the surface (upper surface) of the work table 70 on the work table 70, but in the injured state in the work stage 50. Although the substrate G is delivered, the substrate G is adsorbed onto the surface of the work stage 50 when a printing operation is performed. Therefore, air may be injected through the tiled air line 50a, or air may be adsorbed on the contrary.

For reference, an alignment of the substrate G loaded onto the upper surface of the work stage 50 and adsorbed to the upper surface of the work stage 50 may be an alignment portion (not shown) provided around the work stage 50. Is in charge. That is, the alignment unit moves the work stage 50 itself to the X-axis, Y-axis, Z-axis, and θ-axis to align the substrate G with respect to the blanket roll 40 serving as a reference for the work. .

A series of operations of the printing apparatus having such a configuration will be described below.

First, the substrate G enters the work table 70 by a separate transfer device. When the substrate G is to enter the work table 70, the control unit operates the air supply unit to the air supply line 75 located in the partitions 74 located in front of the side where the substrate G enters. Supply air. Air introduced into the compartments 74 through the air supply line 75 spreads widely in the compartment 74, which is the depression 74, and then guides the porous air provided in the compartments 74. It is injected through the air injection holes 73 through the members 76.

Therefore, the substrate G enters the work table 70 with the predetermined height floating upward from the upper surface of the work table 70. Subsequently, the control unit gradually supplies air to the rear compartments 74 so that air is injected through the rear air spray holes 73 so that the substrate G completely enters the upper portion of the work table 70. Is able to rise to a certain height at the top of the work table (70). Although not described, the substrate G entering the work table 70 may be aligned on the work table 70 by front / rear and left / right alignment parts provided around the work table 70. .

The substrate G floating on the upper surface of the work table 70 is transferred to the upper surface of the work stage 50 by a separate vacuum suction member. The vacuum suction member serves to transfer the substrate G to the work stage 50 in a state where the upper surface of the substrate G is adsorbed. Such a vacuum suction member may be mounted as a separate structure above the work table 70. At this time, since the air is injected to the work stage 50 through the tiled air line 50a, the prior art in which the substrate G is delivered by the up / down operation of the lift pins. It can solve the problem.

When the substrate G is transferred to the upper portion of the work stage 50 by the vacuum adsorption member, the substrate G is lifted up to a predetermined height by the air injected through the tiled air line 50a. When the injection process of the air is stopped, the injection of air is completed and the substrate G is loaded onto the upper surface of the work stage 50. Then, the air is adsorbed through the tiled air line 50a so that the substrate G is adsorbed on the upper surface of the work stage 50 to be fixed.

When the substrate G is fixed by being fixed on the upper surface of the work stage 50, the relative alignment process of the substrate G with respect to the blanket roll 40 is performed. That is, the alignment of the substrate G proceeds while the work stage 50 is moved to the X-axis, Y-axis, Z-axis, and θ-axis by the alignment portion provided around the work stage 50.

Next, the dispenser 30 applies one color resist selected from R, G, and B color resists to the outer surface of the gravure roll 10. At this time, since the tip of the knife 22 of the doctor blade 20 is in contact with the outer surface of the gravure roll 10, the knife 22 is applied to the outer surface of the rotating gravure roll 10 by the knife 22. Unnecessary color resist applied to the remaining surface 10b except the recessed portion 10a is removed. Therefore, finally, the color resist is accommodated only in the recess 10a.

When the color resist is applied to the outer surface of the gravure roll 10, the blanket roll 40 is moved toward the gravure roll 10 by the moving rotation part 42. When the blanket roll 40 is moved to contact the gravure roll 10, the color resist applied to the outer surface of the gravure roll 10 by the relative rotation between the gravure roll 10 and the blanket roll 40 is intact. It is transferred to the sheet wound on the outer surface of 40). After the color resist is transferred to the outer surface of the blanket roll 40, the blanket roll 40 is moved to the initial part of the work stage 50 by the moving rotation part 42 again.

Then, the blanket roll 40 prints any pattern selected from the R, G, and B patterns on the surface of the substrate G while moving and rotating the surface of the substrate G by the moving rotation part 42 (retransition). ) When the print job is completed, the blanket roll 40 is returned to its original position, and the substrate G having finished the print job is taken out and transferred to another printing apparatus for printing a different pattern among R, G, and B patterns, thereby performing the above-described process. Will repeat.

As described above, according to the present embodiment, in the process of transporting the substrate G in order to proceed with the above-described series of printing operations, the substrate G can be lifted more effectively with less air volume than before, and the vortex is generated. By reducing this, it is possible to solve the particle problem caused by the generation of vortex.

In the above-described embodiment, the blanket roll is used to transfer the color resist in the gravure roll, but instead of the gravure roll, a gravure plate having a rectangular plate shape is provided, and the blanket roll is a gravure plate. It may be possible to transfer color resist from the substrate.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

As described above, according to the present invention, it is possible to float the substrate more effectively even with a smaller amount of air than in the related art, and to reduce the occurrence of vortices, thereby preventing particle problems due to the generation of vortices.

Claims (18)

A work table having a plurality of air injection holes through which air for injecting a substrate is floated on a plate surface, the upper and lower plates being in contact with each other; It is provided on the bottom of the upper plate and the air injection holes are divided into a plurality of groups (group) unit, each of which is provided with an air supply line, formed by a depression recessed in a direction from the bottom of the upper plate toward the upper surface A plurality of partitions; And A porous air guide member coupled to each of the plurality of air injection holes to pass air toward the substrate, The porous air guide member, An insertion shaft portion inserted into the air injection hole; And And a head portion connected to the insertion shaft portion and having a relatively large cross-sectional diameter compared to the insertion shaft portion and disposed in the depression area. delete delete The method of claim 1, The air supply line is provided in plurality, One end of each of the air supply line is exposed to the outside of the lower plate and the other end penetrates the lower plate is disposed in the corresponding partition portion. The method of claim 4, wherein An air supply unit supplying air to the plurality of air supply lines; And And a control unit for selectively controlling the flow of air provided to the corresponding partitions through the plurality of air supply lines. The method of claim 5, And the control unit controls the air supply unit so as to sequentially supply air from the partition units in which the air injection holes positioned on the side where the substrate enters are arranged. delete The method of claim 1, And the upper surface of the insertion shaft portion is disposed lower than the upper surface of the upper plate. The method of claim 1, And the work table further comprises at least one air exhaust hole which is ejected from the plurality of air injection holes toward the substrate and exhausts the air flowing back by hitting the substrate. The method of claim 9, And the air exhaust hole is disposed between the air injection holes. The method of claim 10, And a plurality of air exhaust holes are provided in grooves recessed downward from an upper surface of the work table. The method of claim 1, The upper plate is made of aluminum material, the lower plate is a printing apparatus, characterized in that made of stainless steel. The method of claim 1, And a work stage on which a print job is performed on at least one of R (Red), G (Green), and B (Blue) patterns with respect to the substrate transferred from the work table. The work stage is provided with a plurality of air injection holes are sprayed with air for floating the substrate on the plate surface, And a plurality of porous air guide members coupled to the plurality of air injection holes, respectively, for passing air toward the substrate. A work stage having a plurality of air injection holes through which air for injecting the substrate is floated on the plate surface; It is provided on the bottom of the work stage to partition the air injection holes into a plurality of groups (group) unit, each air supply line is disposed, formed by a depression recessed in the direction from the bottom of the work stage toward the top surface A plurality of partitions; And A porous air guide member coupled to each of the plurality of air injection holes to pass air toward the substrate, The porous air guide member, An insertion shaft portion inserted into the air injection hole; And And a head portion connected to the insertion shaft portion and having a relatively large cross-sectional diameter compared to the insertion shaft portion and disposed in the depression area. The method of claim 14, The work stage is a printing device, characterized in that the stone tablets. The method according to claim 14 or 15, The plurality of air injection holes are coupled to the porous air guide member is printed apparatus, characterized in that interconnected by a tiled air line. delete delete

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