KR101000372B1 - Printing stamper for alignment layer, manufacturing method and system therefore - Google Patents

Abstract

PURPOSE: A stamper for an alignment layer print and a manufacturing method thereof for increasing the accuracy of the print are provided to successively manufacture the stamper for the alignment layer print. CONSTITUTION: A thickness adjusting unit(300) adjusts the thickness of a printing film laminated material. An upper side glass(410) is located in the upper side of the printing film laminated material. A lower side plate is arranged in the lower side of the thickness adjusting plate. A combining member combines the lower side plate and the thickness adjusting plate.

Description

A stamper for printing an alignment film, a manufacturing method thereof, and a manufacturing system therefor {PRINTING STAMPER FOR ALIGNMENT LAYER, MANUFACTURING METHOD AND SYSTEM THEREFORE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stamper for printing an alignment film, a method for manufacturing the same, and a manufacturing system thereof, and to improve product thickness precision and print thickness precision of a stamper for printing an alignment film used in a liquid crystal display device (LCD). An alignment film printing stamper, a manufacturing system thereof, and a liquid crystal display device manufactured by using a stamper.

In general, a liquid crystal display (LCD) displays an image by adjusting the light transmittance of the liquid crystal using an electric field.

To this end, the liquid crystal display device includes a liquid crystal panel in which liquid crystal cells are arranged in a matrix, and a driving circuit for driving the liquid crystal panel. The liquid crystal panel is provided with pixel electrodes and a common electrode for applying an electric field to each of the liquid crystal cells. In general, the pixel electrode is formed for each liquid crystal cell on the lower substrate, while the common electrode is formed on the entire surface of the upper substrate.

Each of the pixel electrodes of the lower substrate is connected to a thin film transistor (TFT) used as a switching element. The pixel electrode drives the liquid crystal cell together with the common electrode according to a data signal supplied through the thin film transistor.

1 is a cross-sectional view of a liquid crystal display device according to the prior art.

Referring to FIG. 1, a liquid crystal display device according to the related art includes a top plate including a black matrix 32, a color filter 30, and a transparent electrode 28 sequentially formed on an upper substrate 11, and a lower substrate 1. The liquid crystal 38 injected into the inner space provided by the lower plate including the thin film transistor and the pixel electrode 22 formed on the upper layer, the spacer 26 formed between the upper plate and the lower plate, and the upper plate and the lower plate and the spacer 26. ).

In the upper plate, the black matrix 32 is formed in a matrix form on the upper substrate 11 to separate the surface of the upper substrate 11 into a plurality of cell regions in which the color filters 30 are to be formed, and optical interference between adjacent cells. Serves to prevent. On the upper substrate 1 on which the black matrix 32 is formed, color filters 30 of red, green, and blue primary colors are sequentially formed. In this case, each of the three primary color filters 30 absorbs a white light source on the front surface of the upper substrate 1 on which the black matrix 32 is formed and applies a material that transmits only a specific wavelength (red, green, or blue) light. It is then formed by patterning. On the upper substrate 1 on which the black matrix 32 and the color filter 30 are formed, a transparent electrode 28, which is a transparent conductive film to which a ground potential is supplied, is coated to complete the top plate.

The thin film transistor for switching the driving of the liquid crystal cell on the lower plate is formed at the intersection of the gate line and the data line, and the pixel electrodes 22 overlapping at least one of the data line and the gate line are arranged in a matrix to form a lower substrate ( 1) is formed on. The gate line and the gate electrode are formed by coating and patterning a metal film on the lower substrate 1. The gate insulating layer 12 is formed by depositing the entire surface on the lower substrate to cover the gate line and the gate electrode. The active layer 14 and the ohmic contact layer 16 are formed by sequentially depositing and patterning the first and second semiconductor materials 14 and 16 on the gate insulating layer 12. Subsequently, the data line, the source electrode 8 and the drain electrode 10 are formed by coating and patterning a metal film on the gate insulating film 12, and then the ohmic contact layer 16 is formed to form a channel having a predetermined size. By etching, the active layer 14 is exposed. The contact hole 20 is formed so that the drain electrode 10 is exposed by patterning the surface of the organic protective film 18 by spin coating the gate insulating film and then patterning the organic protective film 18. Next, a transparent conductive material is applied and patterned on the protective layer 18 to form the pixel electrode 22 electrically connected to the drain electrode 10. After the alignment layer 24 is applied to the entire surface of the lower substrate 1 on which the pixel electrode 22 is formed, a rubbing process is performed to complete the lower plate.

Subsequently, the upper plate and the lower plate are bonded to each other, and then the spherical spacers 26 are scattered, and then liquid crystal is injected and sealed to complete the liquid crystal display device.

In order to utilize the completed liquid crystal display device as an optical element, the liquid crystal molecules should be oriented in a specific direction, and ordinary liquid crystal molecules are only oriented locally. Therefore, in order to align the liquid crystal molecules in a specific direction, an organic polymer film called an alignment film is artificially formed on the indium tin oxide (ITO) electrode. For this purpose, the alignment film is formed by applying an alignment liquid, for example, polyamic acid, soluble polyimide, or the like on a substrate, curing it to polyimide, and then rubbing.

Specifically, in the alignment film printing method, the alignment liquid is printed on the upper surface of the substrate by using the alignment film printing apparatus, and the first alignment liquid is first cured by heating the alignment liquid to a temperature of about 60 ° C. to 80 ° C., and then higher 80 ° C. to 200 ° C. Heat to a temperature of about 2 to cure. Thereafter, rubbing or light irradiation is performed on the surface of the alignment liquid to form an alignment film.

2 is a conceptual diagram of an alignment film printing apparatus according to the prior art.

Referring to FIG. 2, an alignment film printing apparatus of a general liquid crystal display device includes a printing roll 56 which is surrounded by a dispenser 56 for supplying an alignment liquid and a print mask 52 and prints the alignment liquid on the upper surface of the liquid crystal display device substrate 50. 51, the anilox roll 53 for depositing the alignment liquid on the printing mask 52, and the doctor roll 54 for evenly applying the alignment liquid provided from the dispenser 56 to the anilox roll 53. ), A stage 58 on which the liquid crystal display device substrate 50 is loaded and seated, a loading device 60 for loading the liquid crystal display device substrate 50 onto the stage 58, and a liquid crystal display on which an alignment film is printed. An unloading device 62 for unloading the device substrate 50 on the stage 58 is provided.

The liquid crystal display substrate 50 is loaded on the stage 58 by the loading device 60 and then unloaded on the stage 58 by the unloading device 62 when the alignment film printing is completed. The stage 58 is conveyed in one direction by a driving roller 59 which is connected to a driving motor (not shown) and rotates.

The dispenser 56 is installed on the anilox roll 53 and moved left and right by a driving device (not shown) to supply the alignment liquid to the outer peripheral surface of the anilox roll 53. The doctor roll 54 serves to evenly spread the alignment liquid supplied from the dispenser 56 to the outer circumferential surface of the anilox roll 53 in a state in which the outer circumferential surface of the doctor roll 54 is in contact with the outer circumferential surface of the anilox roll 53.

The printing mask 52 is attached to the outer circumferential surface of the printing roll 51 as a rubber material. Such a printing mask 52 is brought into contact with the outer circumferential surface of the anilox roll 53 by the rotation of the printing roll 51 so that the alignment liquid printed on the outer circumferential surface of the anilox roll 53 is formed on the liquid crystal display element substrate 50. Print on

The conventional alignment film printing apparatus and method as described above are arranged between the doctor roll 54 and the anilox roll 53 with an alignment liquid, for example, a polyimide solution, by a dispenser 56 which moves left and right to supply the alignment liquid. After decay, it flows down by rotation of the doctor roll 54 and the anilox roll 53, and is then deposited on the printing mask 52 wound around the outer circumferential surface of the printing roll 51. At this time, when the printing roll 51 starts to rotate, power is applied to the driving motor to rotate the driving roller 59. By the rotation of the driving roller 59, the stage 58 loaded with the liquid crystal display device substrate 50 is transported in one direction at a constant speed. Here, the rotational speed of the printing roll 51 and the operation speed of the stage 57 are set equal to each other.

The print mask 52 having received all of the alignment liquid is in contact with the liquid crystal display substrate 50 transported by the stage 58 while being rotated by the rotation of the printing roll 51 and thus the surface of the liquid crystal display substrate 50. A thin alignment liquid is printed on the substrate.

When the alignment film is printed on the liquid crystal display substrate 50, the unloading device 62 unloads the liquid crystal display substrate 50 seated on the stage 58 to the outside. At this time, the stage 58 is unloaded by the unloading device 62, and then is returned to the loading device 60 by the reverse rotation of the driving roller 59. Subsequently, the alignment liquid is printed onto the other substrate 50 by the process as described above.

Of course, in addition to other methods, the alignment layer may be printed on a substrate having a transparent electrode and a color filter through a printing process. The alignment film corresponding to the stamper may be printed, such as flexographic printing.

Various techniques have been developed for the manufacturing technology of such an alignment film printing stamper.

In particular, a stamper manufacturing technology for printing an alignment film using UV (ultraviolet) photosensitive resin has recently been in the spotlight.

The base film is laid on a first glass substrate, a liquid UV photosensitive resin is applied on the first glass substrate, and a transparent cover film of a thin film and an image film having light and non-transmissive regions are laminated, and a second glass substrate is laminated.

Subsequently, UV light is irradiated for a predetermined time through the UV irradiation device from the outside of the film. At this time, the UV photosensitive resin in the transmissive region of the image film is cured by UV irradiation, and not cured in the non-transmissive region.

Subsequently, the cover film and the image film are removed, and the uncured resin is removed to prepare a stamper for printing an alignment film.

However, the conventional stamper for printing an alignment film of the liquid crystal display device has a disadvantage in that its size cannot be increased.

In addition, since the stamper is manufactured in a state in which materials such as a base film, a liquid UV photosensitive resin, a cover film, and an image film are fixedly disposed between the first glass substrate and the second glass substrate, there is a problem that continuous manufacture of the stamper is impossible. .

In addition, the thickness is determined as the product is cured between two glass substrates. However, in the current glass processing technology, the gap between two glass sheets does not reduce an error of ± 30 μm.

Therefore, the present invention was created in order to solve the above problems, and to remove the existing system through the system of supplying material, lower surface exposure, thickness adjustment, upper surface exposure and dispersion treatment system for the alignment film printing stamper using It is to provide an alignment film printing stamper and a method for manufacturing the same and a manufacturing system thereof capable of continuously manufacturing a stamper due to manufacturing.

In addition, the present invention is to provide an alignment film printing stamper and a manufacturing method thereof and a manufacturing system thereof, which is provided with a fine adjustment unit for thickness adjustment in the thickness adjustment unit, and can improve the size and thickness precision of the product through the upper surface exposure unit.

A material supply unit for laminating the photosensitive resin between the roll-shaped base film and the roll-type negative film according to the present invention; A lower surface exposing portion for UV curing the base film portion of the laminated portion; A thickness adjusting unit configured to adjust the thickness of the exposed portions when the layers are stacked; An upper surface exposing unit for fine-adjusting a portion where the thickness is adjusted to maintain a precise thickness and curing the pattern with UV rays; It provides an alignment film printing stamper manufacturing system characterized in that the product withdrawal for drawing out the respective parts at a constant speed.

The upper surface exposure portion is a product thickness by adjusting the gap between the upper surface glass positioned on the upper surface of the print film laminate, the upper surface UV irradiation device positioned on the upper surface of the upper glass, and the lower surface of the printed film laminate. And a flatness adjusting part for adjusting a flatness between the upper surface glass and the thickness adjusting plate through fine adjustment of a height of a portion of the thickness adjusting plate.

The flatness adjusting portion is a lower plate disposed below the thickness adjusting plate; Coupling member for coupling between the lower plate and the thickness adjustment plate; And through the lower plate characterized in that it comprises a deformation member in close contact with the lower side of the thickness adjustment plate.

A bolt or a nut is used as the coupling member and the deforming member, and the deforming member is raised and lowered in a micrometer unit.

The upper surface UV irradiation apparatus includes a plurality of UV lamps in the form of an elongated rod, and the angle between the extension direction axis of the UV lamp and the movement direction axis of the print film stack is 30 to 85 degrees.

In addition, the present invention is a material supply unit for supplying a printed film laminate coated with a photosensitive resin between the roll-shaped base film and the roll-shaped negative film; A thickness adjusting unit for adjusting a thickness of the printed film laminate; A glass fixing plate positioned on the upper surface of the printing film stack, and a plurality of rod-type UV lamps positioned above the glass fixing plate, wherein the UV lamp is disposed obliquely with respect to the drawing direction of the printing film stack. A thickness adjusting plate positioned on a lower surface of the printing film stack and determining a product thickness by adjusting an interval between the glass fixing plate, and a flatness between the glass fixing plate and the thickness adjusting plate through fine adjustment of the height of a portion of the thickness adjusting plate. It provides an upper surface exposure portion having a flatness adjusting portion for adjusting the degree, wherein the printed film laminate is drawn from the material supply portion to the upper surface exposure portion provides a stamper manufacturing system for printing an alignment film.

The angle between the extending direction axis of the UV lamp and the moving direction axis of the print film stack is characterized in that 30 to 85 degrees.

And a lower surface exposing portion for exposing a portion of the photosensitive resin in the region adjacent to the base film provided from the material supply portion, and a drawing portion for extracting the product drawn out from the upper surface exposing portion.

Provided is a stamper for printing an alignment film, wherein a thickness error of a product in which the photosensitive resin is positioned between the base film and the negative film is within ± 30 μm.

The thickness error is characterized in that ± 5㎛ to ± 10㎛.

Applying a photosensitive resin on the base film and disposing a negative film on the photosensitive resin; Irradiating UV light from the lower side of the base film toward the base film to cure a portion of the photosensitive resin disposed on the upper surface of the base film; Adjusting the thickness by pressing the base film and the negative film; And curing the uncured photosensitive resin by irradiating UV light in the upper region of the negative film, pressing the upper side of the negative film with a glass plate, and pressing the base film with a metal plate to obtain a target product thickness. Adjusting the height of a portion of the, and providing a UV lamp for emitting UV light by arranging obliquely with respect to the moving direction axis of the film to provide a method of manufacturing a stamper for printing an alignment film comprising the step of irradiating UV light.

As described above, the present invention can make a stamper continuously by manufacturing a stamper for printing an alignment film by a method of extracting a product through a system for distributing material supply, bottom exposure, top exposure, and thickness adjustment.

Further, by providing a fine adjustment unit for adjusting the thickness at the time of exposure, it is possible to improve the size and thickness accuracy of the product by adjusting the lamp position of the upper surface exposure portion.

1 is a cross-sectional view of a liquid crystal display device according to the prior art.
2 is a conceptual diagram of an alignment film printing apparatus according to the prior art.
Figure 3 is a view of a stamper manufacturing system for printing an alignment film according to an embodiment of the present invention.
4 is a view of a lower surface exposure unit according to an embodiment.
5 is a view showing a thickness adjusting unit according to an embodiment.
6 is a view of an upper surface exposure unit according to an embodiment.
7 is a conceptual diagram of an upper surface exposure unit according to an embodiment.
8 is a partial plan view illustrating a connection relationship between a thickness fine adjusting plate of an upper surface exposure unit and a flatness adjusting unit according to an exemplary embodiment.
9 is a perspective view of a top surface UV irradiation device according to one embodiment.
10 is a top conceptual view of a top surface UV irradiation device according to one embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Like numbers refer to like elements in the figures.

3 is a view illustrating a stamper manufacturing system for printing an alignment film according to an embodiment of the present invention, FIG. 4 is a view of a lower surface exposure unit according to an embodiment, FIG. 5 is a view of a thickness adjusting unit according to one embodiment, and FIG. 6. 7 is a diagram illustrating a top surface exposure unit according to an embodiment, FIG. 7 is a conceptual view illustrating a top surface exposure unit according to one embodiment, and FIG. 8 is a view illustrating a connection relationship between a thickness fine adjustment plate and a flatness control unit according to an embodiment. It is a partial plan view to make. 9 is a perspective view of a top surface UV irradiation apparatus according to an embodiment, and FIG. 10 is a plan view of the topside UV irradiation apparatus according to the embodiment.

3 to 10, the alignment film printing stamper manufacturing system of the liquid crystal display device according to the present invention is an inline system to produce a stamper for printing the alignment film by a roll-type product withdrawal method. In the alignment film printing stamper manufacturing system, the material supply unit 100, the lower surface exposure unit 200, the thickness adjusting unit 300, the upper surface exposure unit 400, and the product extraction unit 500 are sequentially arranged.

The material supply unit 100 supplies the exposed film 200 to the exposed film 200 when the printed film laminate 101 coated with the photosensitive resin 103 is applied between the roll-shaped base film 102 and the roll-shaped negative film 104. .

As shown in FIG. 3, the material supply unit 100 includes a base film supply roll 110 on which the base film 102 is wound, a supply base 120 for moving the base film 102, and the movement. The negative film supply roll 140 in which the resin supply cylinder 130 which supplies the photosensitive resin 103 on the base film 102 to which it is made, and the negative film 104 put on the upper surface of the said photosensitive resin 103 are wound. It is provided.

In this way, the material supply unit 100 places the photosensitive resin 103 between the base film 102 and the negative film 104 to produce the printed film stack 101 and simultaneously move it toward the product outlet 500. Let's do it. That is, while the base film 102 is unrolled from the roll, it moves in the direction of the product lead part 500, the photosensitive resin 103 is applied on the upper portion thereof, and the negative film 104 is pulled on the photosensitive resin 103 upper portion again. While moving in the direction of product withdrawal.

 Of course, as shown in FIG. 1, the material supply unit 100 may be disposed in various ways in which a supply base 120 such as a rotating roller is disposed at various positions.

Here, the resin supply cylinder 130 may supply resin to the upper surface of the moving base film 102, and may uniformly supply resin to the upper surface of the base film 102. To this end, it is effective that the width of the resin outlet of the resin supply container 130 is the same as or similar to the width of the base film 102.

The lower surface exposure unit 200 firstly exposes a portion of the photosensitive resin 103 in a region adjacent to the base film 102 in the printed film stack 101 supplied from the material supply unit 100. Through this, the resin having a predetermined thickness in the region of the base film 102 is cured.

As shown in FIG. 4, the lower surface exposing part 200 is positioned below the lower glass plate 210 and the lower glass plate 210 which the base film 102 of the printed film stack 101 contacts. The lower surface UV irradiation apparatus 220 which irradiates UV light to the (102) direction is included.

The lower glass plate 210 is effective to have a width larger than the width of the base film 102. Through this, the front surface of the base film 102 moving to the product outlet 500 may pass through the lower glass plate 210.

The lower surface UV irradiation device 220 is effective to include a plurality of UV lamps as shown in the figure. A plurality of UV lamps may be disposed in a box-shaped space with an empty interior and an open top. In addition, a reflective film that reflects light may be located inside the box. Of course, a translucent plate may be arranged on top of the box.

Here, the UV lamp is effective to use a bar type lamp. At this time, it is preferable that the extending direction of the UV lamp is disposed perpendicular to the moving direction of the base film. Of course, the present invention is not limited thereto, and the arrangement as described in the upper surface exposure section described later is also possible.

The photosensitive resin 103 is cured by the UV light of the UV lamp (see area A in FIG. 4) and fixed to the base film 102. Then, the photosensitive resin of the remaining upper region passes through the exposed portion 200 while maintaining the liquid state.

The thickness adjusting unit 300 primarily adjusts the thickness of the print film stack 101. That is, the thickness adjusting unit 300 presses the print film stack 101 so as to correspond to the thickness of the target alignment film printing stamper.

As shown in FIG. 5, the thickness adjusting unit 300 includes first and second thickness adjusting means 311 and 312 spaced up and down by a predetermined thickness, that is, a thickness corresponding to the thickness of the alignment film printing stamper. It is provided with a gap adjusting device 320 for adjusting the interval of the second thickness adjusting means (311, 312).

In this embodiment, as shown in FIG. 5, a pair of first and second thickness adjusting means 311 and 312 are positioned before and after in the moving direction of the print film stack 101.

It is effective that the first and second thickness adjusting means 311 and 312 are manufactured in a circular rod shape. In this case, it is effective that the length of the rod is equal to or larger than the width of the print film stack 101. Through this, the entire surface of the print film stack 101 may be uniformly pressed. At this time, the first thickness adjusting means 311 is connected to the base film 102 of the print film stack 101, and the second thickness adjusting means 312 is connected to the negative film 104.

The gap adjusting device 320 includes first and second fixing bodies 321 and 322 fixed to the lower side and the upper side, respectively, based on the print film stack 101, and a pair of first thickness adjusting means 311, respectively. A second support body 324 for supporting a first support body 323 for supporting, a pair of second thickness adjusting means 312, and the first support body 323 and a first fixed body 321, respectively. A first spacing adjusting body 325 connected to the first spacing adjusting body 325 for fine-adjusting the height of the first supporting body 323, and a second supporting body 324 and a second fixing body 323 connected to the second supporting body 323. And a second gap adjusting body 326 for adjusting the height of the body 324.

Here, the space adjusting body (325, 326) and the support body (323, 324) is coupled to the thread structure, the support body (323, 324) is lowered by the thread structure in accordance with the rotation of the space adjusting body (325, 326) do. Of course, the present invention is not limited thereto, and the bodies may be manufactured in various vertical moving structures, such as a rack and pinion structure or a vertical sliding structure. In addition, this may be controlled by applying an automatic or manual driving method.

Here, the interval between the first and second thickness adjusting means by the gap adjusting device 320 is finely adjusted in units of μm.

The photosensitive resin 103 in the printing film laminated body 101 passes completely by the upper surface exposure part 400. FIG. At this time, some areas are not exposed and cured by UV by the negative film 104 above the photosensitive resin 103. And the stamper for printing is produced in the upper surface exposure part 400, and the final thickness is determined. Therefore, the precision of the surface thickness must be taken very precisely. As mentioned in the prior art, conventionally, an error in product thickness cannot be reduced to within ± 30 μm. Thus, the present applicant has released a product that reduces the error within ± 30㎛ through the control of the upper surface exposure unit 400.

Hereinafter, such an upper surface exposure unit will be described with reference to the drawings of FIGS. 6 to 10.

The upper surface exposure unit 400 includes an upper surface glass 410 positioned on the upper surface of the print film stack 101, an upper surface UV irradiation device 420 positioned on the upper surface of the upper glass 410, and the printed film stack. Located on the lower surface of the 101 and the thickness adjusting plate 430 to determine the product thickness of the alignment film printing stamper by adjusting the gap with the upper surface glass 410, and the upper surface glass 410 through fine adjustment of the thickness adjusting plate 430 ) And the flatness fine control unit 440 to adjust the flatness between the thickness adjusting plate 430.

The upper glass 410 is spaced apart from the thickness adjusting plate 430 and the flatness fine control unit 440 coupled as shown in FIG. 7. At this time, the interval is the same as the thickness of the stamper for printing the alignment film as the actual target. Here, the upper glass 410 is fixed to the upper region of the thickness adjusting plate 430 by a separate fixing means. The top glass 410 is preferably in contact with the negative film 104 of the print film stack 101. Through this, UV light irradiated from the upper side may be irradiated into the print film stack 101.

The thickness adjusting plate 430 is positioned below the upper glass 410. The thickness adjusting plate 430 is connected to the base film portion of the print film stack 101. In this embodiment, an iron plate is used as the thickness adjusting plate 430. Of course, the present invention is not limited thereto, and various types of plate-shaped materials may be used. And it is preferable to use the metal plate which is very excellent in surface flatness through the surface processing.

In addition, a fine adjusting part 440 is provided below the thickness adjusting plate 430 to fix the thickness adjusting plate 430 and to match the surface flatness between the thickness adjusting plate 430 and the upper glass 410.

Fine adjustment unit 440 is a lower plate 441 disposed on the lower side of the thickness adjusting plate 430, a coupling member 442 for coupling between the lower plate 441 and the thickness adjusting plate 430, and the lower The deformation member 443 penetrates the side plate 441 and applies a local pressure to the lower side of the thickness adjusting plate 430 to locally deform the flatness of the thickness adjusting plate 430. As shown in FIG. 6, the fine control unit 440 includes a lower product guide unit 444 supporting the respective members.

In this case, the lower plate 441 may use an iron plate of the same material as that of the preceding thickness adjusting plate 430 or another metal plate. It is effective here that the thickness of the lower plate 441 is thicker than the thickness of the thickness adjusting plate 430. Through this, the lower plate 441 may effectively support the thickness adjusting plate 430, and may hold an elastic force against deformation of the thickness adjusting plate 430.

The coupling member 442 is effective to use a bolt and / or nut. As shown in FIG. 8, the thickness adjusting plate 430 is provided with a groove (eg, a fixing bolt hole and a fixing nut hole) to which the coupling member 442 is fixed to use the coupling member 442 as described above. As shown in FIG. 8, the lower plate 441 is provided with a through groove through which the coupling member 442 penetrates.

The deforming member 443 penetrates the lower plate 441, and it is effective to use a bolt or nut that is in close contact with the lower surface of the thickness adjusting plate 430. It is effective that the deforming member 443 is uniformly distributed on the entire surface of the lower plate 441. Through this, the flatness can be adjusted over the entire surface of the thickness adjusting plate 430. That is, when the deformation member 443 rises, the area of the thickness adjusting plate 430 in close contact with the deformation member 443 rises. In addition, when the deformable member 443 descends, the area of the thickness adjusting plate 430 which is in close contact with the deformable member 443 is relatively lowered. As such, the plan view of the thickness adjusting plate 430 may be adjusted to match the upper surface glass 410 by adjusting the nut used as the deforming member 443. That is, through this, the thickness adjusting plate 430 on the upper side can be bent to minimize the gap error with the glass.

At this time, the deforming member 443 is raised and lowered in units of μm. Through this, the plan view of the corresponding region of the thickness adjusting plate 430 may be adjusted in units of micrometers. Therefore, the flatness error between the upper surface glass 410 and the thickness control plate 430 can be achieved up to ± 10 μm through the deformable member 443.

With current glass processing techniques it is virtually impossible to control the error range of the flatness of the glass surface to within ± 30 μm. Therefore, the thickness flattening error of the conventional alignment film printing stamper was applied up to ± 30㎛. However, in this embodiment, the error of thickness flattening of the alignment film printing stamper can be applied up to ± 10 μm.

Here, it is effective that the lower plate 441 is provided with a fine adjustment screw hole through which the deformation member 443 penetrates and is coupled. At this time, it is effective that a screw thread corresponding to the deforming member 443 is formed on the inner side surface of the hole.

The printing thickness precision at the time of alignment film printing takes 30% of product thickness precision, and the size and uniformity of the dot of a product surface occupy 70%.

Therefore, the product thickness precision through the flatness control unit as mentioned above can be improved compared to the prior art.

In addition, in this embodiment, in order to improve the uniformity of the size and arrangement of the dot on the surface of the product, the amount of UV light irradiated onto the printed film laminate 101 was uniformly irradiated on the entire surface. To this end, the arrangement of the UV lamps in the top UV irradiation device 420 is changed.

As shown in FIGS. 9 and 10, the upper surface UV irradiation device 420 includes a plurality of UV lamps 421 and a UV lamp box 422 supporting the plurality of UV lamps 421.

As shown in the figure, the UV lamp box 422 has a rectangular shape extending in the moving direction of the print film stack 101. In addition, the UV lamp box 422 is fixedly mounted on the upper side of the name glass 410. Of course, the upper glass 410 may be fixed to the UV lamp box 422.

The UV lamp 421 is manufactured in a bar type extending in one direction as shown in the figure. In this embodiment, it is effective that the UV lamp 421 is disposed obliquely with respect to the extended reference axis extending horizontally with respect to the moving direction of the print film stack 101. At this time, the angle θ between the axis parallel to the extension length of the UV lamp 421 and the extension reference axis is effective to be 20 to 85 degrees. Preferably it is effective that the said angle angle (theta) is 30-45 degree.

Through this, the amount of light irradiated from the UV lamp can be constant to improve the size of the dot and the uniformity of the arrangement. If it is smaller than the above range, an area where light does not reach is generated, and if it is larger than the above range, a phenomenon in which the amount of light is concentrated in the center area without a difference from the conventional vertical direction occurs.

As described above, the light amount for each position and the alignment film printing thickness for each position when the UV lamp was irradiated obliquely with respect to the moving direction axis of the print film laminate 101 and when the UV lamps were arranged vertically were measured.

At this time, the angle formed by the movement direction axis and the UV lamp was 30 degrees, and when the angle formed by the movement direction axis and the lamp was 0 degrees, the amount of light for each position of the UV irradiation apparatus (that is, the exposure machine) was measured.

11 and 12 are views for explaining the amount of light for each position of the UV irradiation device.

FIG. 11 shows each position when the angle of the movement direction axis and the ramp is 0 degrees, and FIG. 12 shows each position when the angle of the movement direction axis and the ramp is 30 degrees.

As shown in FIGS. 11 and 12, the UV irradiation apparatus is separated into an inlet, an outlet, and an intermediate part as the print film stack 101 moves.

First, as shown in FIG. 11, when the angle of the movement direction axis and the lamp is 0 degrees, eight lamps are disposed on the printed film stack 101. Of course, it is not limited to this, and may be more or less than this. In this case, numbers 1 to 15 are sequentially numbered in the interval between the lamp area and the lamp at the inlet. In addition, the intermediate portion is sequentially numbered 16 to 30 in the interval between the lamp area and the lamp. Also, the discharge part is numbered 31 to 45 in the lamp area and the gap area between the lamps. The amount of light by the exposure apparatus, that is, the UV irradiation apparatus, was measured based on the region to which the number was given, and the results were summarized as in Table 1 below.

location One 2 3 4 5 6 7 8 9 10 Quantity of light 1.4 1.45 1.5 1,47 1.45 1.53 1.6 1.55 1.5 1.45 location 11 12 13 14 15 16 17 18 19 20 Quantity of light 1.4 1.45 1.5 1.55 1.6 2.0 2.1 2.2 2.18 2.15 location 21 22 23 24 25 26 27 28 29 30 Quantity of light 2.18 2.21 2.2 2.18 2.24 2.3 2.23 2.16 2.18 2.2 location 31 32 33 34 35 36 37 38 39 40 Quantity of light 1.6 1.53 1.45 1.5 1.5 1.45 1.4 1.5 1.6 1.55 location 41 42 43 44 45 Quantity of light 1.5 1.53 1.55 1.53 1.5

Subsequently, as shown in FIG. 12, when the moving direction axis and the angle of the lamp are 30 degrees, nine to ten lamps are disposed on the printed film stack 101. Of course, this may be more or less depending on the angle and ramp spacing. At this time, the interval between the lamps is equal to the preceding 0 degrees. About nine lamps are arranged at the inlet. Therefore, numbers 1 to 18 are sequentially numbered in the interval between the lamp area and the lamp. About 10 lamps are arranged in the middle part and the discharge part. Therefore, the intermediate part is sequentially numbered 19 to 36 in the lamp area and the area between the lamps, and the discharge part is numbered 38 to 56. And the light quantity by the exposure machine in the area | region to which the said number was given was measured, and it summarized as shown in Table 2.

location One 2 3 4 5 6 7 8 9 10 11 12 13 14 Quantity of light 1.4 1.38 1.55 1.48 1.6 1.5 1.6 1.48 1.55 1.45 1.55 1.43 1.5 1.45 location 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Quantity of light 1.6 1.4 1.4 1.5 2.1 2.3 2.17 2.24 2.05 2.05 2.03 2.2 2.09 2.18 location 29 30 31 32 33 34 35 36 37 38 39 40 41 42 Quantity of light 2.14 2.3 2.18 2.25 2.07 2.08 2.01 2.15 1.5 1.6 1.43 1.45 1.38 1.5 location 43 44 45 46 47 48 49 50 51 52 53 54 55 56 Quantity of light 1.55 1.46 1.48 1.5 1.42 1.54 1.37 1.4 1.4 1.6 1.45 1.5 1.38 1.45

Fig. 13 is an open side view of the finished product up to the upper exposure;

As shown in Fig. 13, the product was separated into about 13 areas in the horizontal direction, and the alignment film printing thickness in this area, that is, the coating thickness was measured.

First, when the angle of the movement direction axis and the lamp is 0 degrees is shown in Table 3. The unit of coating thickness is Å.

location One 2 3 4 5 6 7 8 9 10 11 12 13 Coating thickness 802 810 830 813 906 910 908 915 905 813 802 825 810

Subsequently, when the angle of the movement direction axis and the ramp is 30 degrees, it is shown in Table 4 below.

location One 2 3 4 5 6 7 8 9 10 11 12 13 Coating thickness 905 903 909 910 904 895 902 900 894 899 905 906 902

As shown in Tables 3 and 4, when the angle between the direction of movement and the lamp is 0 degrees, the difference in the amount of light for each part is large, resulting in a difference in the print thickness of the alignment film of 113 kW. However, when the angle between the direction of movement axis and the lamp is 30 degrees, the difference in the amount of light for each part is small, and it can be seen that the difference in the thickness of the alignment film printing is very small as 15 μs. It can be seen that the flatness of the alignment layer is improved. This means that printing uniformity is greatly improved.

In the present exemplary embodiment, the product having the photosensitive resin cured through the above-described upper surface exposure unit 400 is drawn out to the product extraction unit 500 to be discharged while maintaining the horizontal state.

At this time, the product takeout part 500 is provided with a motor for rotating the takeout roll and the takeout roll.

As described above, in the present embodiment, a stamper for printing an alignment layer on which a base film, a photosensitive resin, and a negative film are laminated may be manufactured using the system, and in this case, the thickness error of the product of the stamper may be reduced to ± 30 μm or less. Preferably it can be reduced to ± 20㎛. Product thickness errors can be manufactured in the range of ± 5㎛ to ± 10㎛.

The manufacturing method of such an alignment film printing stepper is manufactured according to the system mentioned above. That is, first, a photosensitive resin is apply | coated on a base film, and a negative film is arrange | positioned on a photosensitive resin. UV light is irradiated from the lower direction of the base film toward the base film to cure a portion of the photosensitive resin located on the upper surface of the base film. Next, the thickness is adjusted by pressing the base film and the negative film. Subsequently, UV light is irradiated in the upper region of the negative film to cure the uncured photosensitive resin. At this time, the upper side of the negative film is pressed with a glass plate, and the base film is pressed with a metallic plate so as to have a target product thickness. At this time, the height of a part of the metallic plate is adjusted to reduce the gap between the glass plate and the metallic plate. And the UV lamp which emits UV light is arrange | positioned obliquely with respect to the moving direction axis of films. This can improve the product thickness of the printing stamper and the thickness uniformity after printing.

100 material supply part 200 lower surface exposure part
300: thickness adjusting unit 400: upper surface exposure unit
410: glass fixing plate 420: top UV irradiation device
430: thickness adjusting plate 440: flatness adjustment unit
500: product outlet

Claims (10)

A material supply unit for supplying a printed film laminate in which a photosensitive resin is laminated between a roll base film and a roll negative film;
A thickness adjusting unit for adjusting a thickness of the printed film laminate;
An upper surface glass positioned on an upper surface of the printed film laminate,
A top UV irradiator disposed on the top glass and including a plurality of UV lamps in the form of elongated rods;
A thickness adjusting plate positioned on a lower surface of the printing film laminate to determine a thickness of the stamper for alignment film printing by adjusting a gap with the upper glass;
A top surface exposure unit having a flatness fine control unit for adjusting the flatness between the top glass and the thickness control plate through fine adjustment of the height of the partial region of the thickness adjustment plate,
The printed film stack is drawn from the material supply portion to the top surface exposure portion,
And an angle between the extension direction axis of the UV lamp and the movement direction axis of the print film stack is 20 to 85 degrees. The method of claim 1, wherein the flatness fine adjustment unit
A lower plate disposed below the thickness adjusting plate;
Coupling member for coupling between the lower plate and the thickness adjustment plate; And
And a deformable member penetrating the lower plate to be in close contact with the lower surface of the thickness adjusting plate. The method of claim 2,
A bolt or a nut is used as the coupling member and the deformable member, and the deformable member is raised and lowered in a micrometer unit. The method of claim 1,
And an angle between the extension direction axis of the UV lamp and the movement direction axis of the print film stack is 30 to 45 degrees.
delete delete The method according to any one of claims 1 to 4,
A lower surface exposing portion for exposing a portion of the photosensitive resin in the region adjacent to the base film provided from the material supply portion;
And a drawing portion for drawing out the alignment film printing stamper drawn out from the upper surface exposure portion. delete delete Applying a photosensitive resin on the base film and disposing a negative film on the photosensitive resin;
Irradiating UV light from the lower side of the base film toward the base film to cure a portion of the photosensitive resin disposed on the upper surface of the base film;
Adjusting the thickness by pressing the base film and the negative film; And
UV light is irradiated from the upper region of the negative film to cure the uncured photosensitive resin, and the upper side of the negative film is pressed with a glass plate, and the base film is pressed with a metallic plate to have a thickness of a target stamping film printing stamper. Adjusting the height of a portion of the metallic plate, and arranging an extension direction axis of the UV lamp that emits UV light at an angle of 20 to 85 degrees with respect to the movement direction axis of the films to irradiate UV light. The manufacturing method of the stamper for orientation film printing.

Images