Stamp cleaning device

Abstract

The present invention relates to a stamp cleaning device characterized by comprising: a roller-to-roller unit that includes a first rolling part and a second rolling part disposed at a distance from the first rolling part and that moves an adhesive film from the first rolling part to the second rolling part; and a cleaning unit which is disposed between the first rolling part and the second rolling part, stretches the adhesive film, and causes the stretched adhesive film to adhere to a contaminant adhered to a stamp, thereby cleaning the contaminant of the stamp, the roller-to-roller unit winds the adhesive film to which the contaminant is adhered on the second rolling part.

Description

Technical Field

[0001] The present invention relates to a stamper cleaning device and method for cleaning a stamper. Background Art

[0002] With the development of multimedia, the importance of display devices is increasing. For this reason, various display devices such as organic light emitting display (OLED) devices and liquid crystal display (LCD) devices are being used.

[0003] As a device for displaying an image of a display device, it includes a display panel such as a light emitting display panel or a liquid crystal display panel. Among them, the light emitting display panel may include a light emitting diode (LED), and the light emitting diode includes an organic light emitting diode using an organic substance as a fluorescent substance or an inorganic light emitting diode using an inorganic substance as a fluorescent substance, etc.

[0004] Generally, inorganic light emitting diodes are manufactured on a wafer using an epitaxial growth method. The inorganic light emitting diodes manufactured using the epitaxial growth method usually go through a process of separating from the wafer and transferring to another target substrate. That is, transfer is a series of actions of transferring single or multiple micro LEDs to a target substrate.

[0005] As an existing method for transferring a single LED chip, a pick-and-place device is used in the packaging process, but as the size of the LED becomes smaller to the micron level, there are limitations that it is difficult to meet the operation speed and difficult to perform precise transfer using the conventional pick-and-place device.

[0006] Currently, as methods for transferring multiple micro LEDs, there are two representative methods: direct transfer and printing transfer.

[0007] Direct transfer is a technique of directly bonding the material or film to be transferred to a target substrate, and printing transfer is defined as a technique using an intermediate medium such as static electricity or a stamp.

[0008] In particular, in the transfer using a stamp, continuously maintaining the adhesive force of the stamp will act as a very important factor. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a stamper cleaning device and method that can easily remove light emitting elements and the like remaining on a stamper by transferring a bonding film arranged in a roll-to-roll manner with the bonding surface on the upper surface.

[0010] The technical problems of the present invention are not limited to the above-mentioned technical problems, and those skilled in the art can clearly understand other technical problems not mentioned through the following description.

[0011] According to an embodiment, a mold cleaning device for solving the above technical problems includes: a roll-to-roll unit including a first rolling part and a second rolling part arranged at a distance from the first rolling part, and moving a bonding film from the first rolling part to the second rolling part; and a cleaning unit arranged between the first rolling part and the second rolling part, stretching the bonding film, and bonding the stretched bonding film to contaminants bonded to the mold, thereby cleaning the contaminants on the mold, wherein the roll-to-roll unit can wind the bonding film bonded with the contaminants around the second rolling part.

[0012] The cleaning unit may include a support part for supporting the bonding film and a driving part capable of moving up and down, wherein the support part may include a support suction cup for fixing the bonding film.

[0013] The driving part may include an upper driving part and a lower driving part capable of moving up and down, wherein the upper driving part may move downward and the lower driving part may move upward to fix the bonding film.

[0014] The support part may further include an up-and-down moving part capable of moving up and down, wherein the driving part may fix the bonding film, and the up-and-down moving part may rise to stretch the bonding film circumferentially.

[0015] The driving part may fix the bonding film, and the roll-to-roll unit and the driving part may move downward to stretch the bonding film circumferentially.

[0016] The first rolling part may supply a composite paper film with a release paper attached to the bonding film, and may arrange the release paper in the outer direction of the first rolling part.

[0017] The roll-to-roll unit may further include a third rolling part for separating the release paper from the composite paper film.

[0018] The roll-to-roll unit may further include: a first guide roller arranged between the first rolling part and the cleaning unit and guiding the bonding film; and a second guide roller arranged between the second rolling part and the cleaning unit and guiding the bonding film.

[0019] The upper driving part may include an opening part wider than the upper surface of the support part at a position overlapping with the support part.

[0020] The contaminants may include one or more of one or more light-emitting elements and dust.

[0021] The cleaning unit may be in the shape of a roller and be capable of moving up, down, left, and right.

[0022] The cleaning unit may move in the direction where the mold is located and stretch the adhesive film circumferentially to bond the adhesive film to the mold.

[0023] The cleaning unit may be bonded to the mold and move left and right.

[0024] The first rolling part, the second rolling part, and the third rolling part may rotate in the same direction.

[0025] In another embodiment of the present invention, the mold cleaning method may include the following steps: a roll-to-roll unit supplies an adhesive film onto the cleaning unit in a roll-to-roll manner; the cleaning unit stretches the adhesive film and bonds contaminants of the mold to the bonding surface of the adhesive film to perform cleaning; and the roll-to-roll unit recovers the adhesive film bonded with the contaminants.

[0026] In one embodiment, in the step of supplying the adhesive film onto the cleaning unit, the roll-to-roll unit may separate the release paper from the composite paper film wound around the first rolling part through the third rolling part and transfer the composite paper film with the release paper separated to the second rolling part.

[0027] In one embodiment, in the step of bonding the contaminants of the mold to perform cleaning, the cleaning unit may move the upper driving part downward and the lower driving part upward to fix the adhesive film, raise the supporting part supporting the adhesive film upward to stretch the adhesive film circumferentially, and during the period of peeling off by bonding the contaminants of the mold to the bonding surface of the adhesive film, use the supporting suction cups on the supporting part to fix the adhesive film so that the adhesive film does not rise with the mold.

[0028] In one embodiment, in the step of bonding the contaminants of the mold to perform cleaning, the cleaning unit may move the upper driving part downward and the lower driving part upward to fix the adhesive film, and move the roll-to-roll unit, the upper driving part, and the lower driving part downward to stretch the adhesive film circumferentially, and during the period of peeling off by bonding the contaminants of the mold to the bonding surface of the adhesive film, use the supporting suction cups on the supporting part to fix the adhesive film so that the adhesive film does not rise with the mold.

[0029] In one embodiment, the cleaning unit may be in the shape of a roller. In the step of cleaning by adhering to the contaminants of the stamper, the cleaning unit may move up and down toward the stamper side, contact the stamper, and move left and right on one surface of the stamper, thereby cleaning the contaminants of the stamper.

[0030] Before the step of cleaning by adhering to the contaminants of the stamper, the step of stopping the operation of the roll-to-roll unit may further be included.

[0031] According to an embodiment of the present invention, by removing light-emitting elements and the like remaining on the stamper, the number of uses of the stamper is increased, thereby enabling the extension of the stamper replacement cycle, and further enabling the extension of the product production time.

[0032] In addition, in the case where there are no wrinkles in the adhesive film, the adhesive film is attached to the stamper, thereby enabling an increase in the stamper cleaning efficiency.

[0033] The effects according to the embodiments are not limited to the contents exemplified above, and more various effects are included in the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a perspective view showing the configuration of a stamper cleaning device according to an embodiment.

[0035] Figure 2 is along Figure 1 the dashed line in

[0036] Figure 3 is a perspective view for explaining the structure of a composite paper film.

[0037] Figure 4 is a flowchart for explaining a stamper cleaning method according to an embodiment.

[0038] Figures 5 to 11 is a diagram schematically showing a step of a stamper cleaning method according to an embodiment.

[0039] Figures 12 to 19 is a diagram schematically showing a step of a stamper cleaning method according to another embodiment.

[0040] Figure 20 is a perspective view showing the configuration of a stamper cleaning device according to an embodiment.

[0041] Figure 21 is along Figure 20 the dashed line in

[0042] Figures 22 to 26 is a diagram schematically showing a step of a stamper cleaning method according to an embodiment.

[0043] Figure 27 Schematic diagram of an impression cleaning device according to another embodiment.

[0044] Figure 28 It is used to illustrate Figure 27 The figure of the operation method of the impression cleaning device.

[0045] Description of reference numerals SC1: First impression cleaning device SC2: Second impression cleaning device SC3: Third impression cleaning device SC4: Fourth impression cleaning device 100: Roll-to-roll unit 110: First rolling part 120: Second rolling part 130: Third rolling part 140: First guide roller; 150: Second guide roller 200, 201: Cleaning unit C: Composite paper film F: Adhesive film LE: Light-emitting element Detailed implementation manners

[0046] Referring to the embodiments described in detail below in conjunction with the accompanying drawings, the advantages and features of the present invention and the methods for realizing these advantages and features will become clear. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. The provision of this embodiment is only intended to make the disclosure of the present invention complete and to fully inform those with ordinary knowledge in the technical field to which the present invention pertains of the scope of the present invention. The present invention is only defined by the scope of the claims.

[0047] When an element or layer is referred to as being "on" another element or layer, it includes all cases where it is immediately above the other element or layer or there is another layer or other element sandwiched in between. Throughout the specification, the same reference numerals refer to the same components. The shapes, sizes, ratios, angles, quantities, etc. disclosed in the drawings for illustrating the embodiments are exemplary, so the present invention is not limited to what is illustrated.

[0048] Although terms such as "first" and "second" are used to describe various components, these components are clearly not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first component mentioned below can obviously also be the second component within the technical concept of the present invention.

[0049] Each feature of various embodiments of the present invention can be combined or combined partially or wholly with each other, and various linkages and drives can be performed technically. And each embodiment can be implemented independently of each other or implemented together in a related relationship.

[0050] Hereinafter, specific embodiments will be described with reference to the drawings.

[0051] Figure 1 It is a perspective view showing the configuration of a mold cleaning device according to an embodiment. Figure 2 Is along Figure 1 The cross-sectional view taken along the dotted line in. Figure 3 It is a perspective view for explaining the structure of a composite paper film.

[0052] Refer to Figure 1 And Figure 2 , the mold cleaning device SC1 (which may also be referred to as "the first mold cleaning device SC1") as a device for removing a light-emitting element LE or the like attached to the mold 10 may include a roll-to-roll unit 100 and a cleaning unit 200.

[0053] The roll-to-roll unit 100 supplies a bonding film F for bonding and separating the light-emitting element LE attached to the mold 10 in a roll-to-roll manner.

[0054] The roll-to-roll unit 100 may include a first rolling part 110, a second rolling part 120, and a third rolling part 130. The first rolling part 110 and the second rolling part 120 may be arranged side by side, and the third rolling part 130 may be arranged above the first rolling part 110. The roll-to-roll unit 100 may further include a first guide roller 140 and a second guide roller 150.

[0055] Refer to Figure 3 , the composite paper film C is composed of a release paper R attached to the bonding film F. The bonding film F is a film coated with an adhesive S on one surface, and the release paper R is arranged on the adhesive S to prevent foreign substances from attaching to the adhesive S.

[0056] The bonding film F can be formed of a stretchable and elastic polymer substance. For example, the stretchable and elastic polymer substance may include polyolefine, polyvinyl chloride (PVC), elastomeric silicone, elastomeric polyurethane, elastomeric polyisoprene, etc.

[0057] For example, the adhesive S may contain one or more of polyurethane acrylate, epoxy acrylate, and polyester acrylate.

[0058] In the roll-to-roll unit 100, the first rolling part 110, the second rolling part 120, and the third rolling part 130 may operate synchronously with each other, but are not limited thereto.

[0059] The first rolling part 110 continuously unwinds the pre-wound composite paper film C while rotating in place in one direction (for example, the clockwise direction). The third rolling part 130 winds only the release paper R from the composite paper film C unwound from the first rolling part 110 while rotating in place in one direction (for example, the clockwise direction). Thus, the release paper R is removed from the composite paper film C by the roll-to-roll unit 100, so that the adhesive S is exposed on the upper surface of the adhesive film F. One end of the adhesive film F is wound around the second rolling part 120. The second rolling part 120 continuously winds the adhesive film F unwound from the first rolling part 110 while rotating in place in one direction (for example, the clockwise direction).

[0060] A cleaning unit 200 is arranged between the first rolling part 110 and the second rolling part 120. Therefore, the adhesive film F unwound from the first rolling part 110 and having the adhesive S exposed on the upper surface is continuously supplied to the cleaning unit 200.

[0061] A first guide roller 140 is arranged between the first rolling part 110 and the cleaning unit 200 to guide and arrange the adhesive film F from the first rolling part 110 to the cleaning unit 200.

[0062] A second guide roller 150 is arranged between the cleaning unit 200 and the second rolling part 120 to guide and arrange the adhesive film F from the cleaning unit 200 to the second rolling part 120.

[0063] The cleaning unit 200 may include a support part 210 and a driving part 220.

[0064] The support part 210 may support the adhesive film F. The support part 210 may include a support suction cup 210-C. The support suction cup 210-C may be one of an electrostatic suction cup, an adhesive suction cup, a vacuum suction cup, and a porous vacuum suction cup. The support suction cup 210-C may adsorb and fix the rear surface of the adhesive film F arranged on the support part 210.

[0065] In one embodiment, the support part 210 can move up and down. For example, the support part 210 may include a support plate 211 and an up-and-down moving part 212. The support plate 211 has an upper surface in a disc shape or a polygonal panel shape. The adhesive film F may be arranged on the upper surface of the support plate 211.

[0066] One side of the vertically moving part 212 can be assembled to the back surface of the support plate 211, and the other side can be assembled to a pneumatic or hydraulic pressure regulator. Thus, the vertically moving part 212 can move the support plate 211 in one direction or the other direction in the Z direction by means of the pneumatic or hydraulic pressure regulator.

[0067] The driving part 220 can move up and down and can be arranged to surround the support part 210. The driving part 220 can include an upper driving part 221 and a lower driving part 222. In addition, the driving part 220 can also include a buffer material 223.

[0068] The upper driving part 221 can move up and down and can have an opening 221-O in the center. The size of the opening 221-O can be larger than the size of the stamper 10. In addition, the size of the opening 221-O can be larger than the size of the support part 210.

[0069] The lower driving part 222 is arranged below the upper driving part 221 and can move up and down. The lower driving part 222 moves upward and the upper driving part 221 moves downward, so that the upper driving part 221 and the lower driving part 222 can be brought into contact with each other. A bonding film F is arranged on the lower driving part 222. If the lower driving part 222 moves upward and the upper driving part 221 moves downward, the bonding film F can be fixed.

[0070] The buffer material 223 can be arranged between the upper driving part 221 and the lower driving part 222. The buffer material 223 can be formed of an elastic material to buffer the impact generated when the upper driving part 221 and the lower driving part 222 come into contact with each other. For example, the buffer material 223 can be an O-ring.

[0071] According to an embodiment, in a state where the bonding film F supplied by the roll-to-roll unit 100 is fixed by the upper driving part 221 and the lower driving part 222, the support part 210 moves upward, so that the bonding film F can be stretched. If the bonding film F is stretched, the wrinkles of the bonding film F can be removed. Therefore, when the bonding film F contacts the lower surface of the stamper 10 in a stretched state, all the light-emitting elements LE and dust arranged on the lower surface of the stamper 10 can be removed.

[0072] In addition, according to an embodiment, during the supply of the bonding film F by the roll-to-roll unit 100, since the bonding surface FS of the bonding film F (refer to Figure 8 ) does not directly contact each component, the adhesion of foreign matters on the bonding surface FS of the bonding film F can be minimized.

[0073] Figure 4 It is a flowchart for explaining an imprint cleaning method according to an embodiment.

[0074] A method for cleaning an impression according to an embodiment includes the following steps: a roll-to-roll unit 100 peels a release paper R from a composite paper film C and supplies an adhesive film F to a cleaning unit 200 in a roll-to-roll manner (S110); the cleaning unit 200 supports the adhesive film F during cleaning by bonding contaminants of the impression 10 to the adhesive surface FS of the adhesive film F (S120); and the roll-to-roll unit 100 recovers the adhesive film F with contaminants attached to the adhesive surface FS (S130).

[0075] Figures 5 to 11 is a diagram schematically showing a step of a method for cleaning an impression according to an embodiment. Figures 5 to 11 The impression cleaning device can correspond to Figure 2 the impression cleaning device.

[0076] Hereinafter, with reference to Figures 4 to 11 , a method for cleaning an impression according to an embodiment will be described.

[0077] First, with reference to Figure 5 , a first rolling part 110 of the roll-to-roll unit 100 peels the release paper R of the composite paper film C from the adhesive film F and supplies the adhesive film F to the cleaning unit 200 in a roll-to-roll manner ( Figure 4 S110). For example, in a state where the composite paper film C is wound around the first rolling part 110 of the roll-to-roll unit 100, one end of the release paper R of the composite paper film C is wound around the third rolling part 130, and one end of the adhesive film F from which the release paper R is peeled is wound around the second rolling part 120, if the first rolling part 110 rotates in one direction (for example, the clockwise direction), the second rolling part 120 and the third rolling part 130 can rotate synchronously. The second rolling part 120 and the third rolling part 130 can rotate in the same direction as the first rolling part 110 (the clockwise direction). In addition, the first guide roller 140 and the second guide roller 150 arranged between the first rolling part 110 and the second rolling part 120 also rotate in the same direction as the first rolling part 110 (the clockwise direction). Thus, the release paper R of the composite paper film C is peeled from the adhesive film F to expose the adhesive surface FS of the adhesive film F. The adhesive film F with the adhesive surface FS exposed as described above will be transferred to the cleaning unit 200 along the first guide roller 140. At this time, the first guide roller 140 arranged between the first rolling part 110 and the cleaning unit 200 can assist in the transfer of the adhesive film F.

[0078] The composite paper film C is arranged such that the adhesive film F faces the first rolling part 110 and the release paper R faces the outside, and the third rolling part 130 is arranged above the first rolling part 110. Therefore, during the transfer of the adhesive film F from which the release paper R is peeled to the cleaning unit 200, the adhesive surface FS of the adhesive film F does not contact other units such as guide rollers, so that the adhesive force can be maintained.

[0079] Next, with reference toFigures 6 to 9 During the cleaning in which the contaminant of the stamper 10 adheres to the adhesive surface FS of the adhesive film F, the cleaning unit 200 supports the adhesive film F ( Figure 4 in S120).

[0080] For example, referring to Figure 6 , the upper driving unit 221 and the lower driving unit 222 move up and down toward the adhesive film F side to fix the adhesive film F. The upper driving unit 221 moves downward and the lower driving unit 222 moves upward to press the adhesive film F from above and below, thereby fixing the adhesive film F. During the period when the adhesive film F is fixed by the upper driving unit 221 and the lower driving unit 222, the roll-to-roll unit 100 can stop operating. The upper driving unit 221 and the lower driving unit 222 can move after the operation of the roll-to-roll unit 100 stops.

[0081] Referring to Figure 7 , the vertical moving part 212 of the support part 210 moves upward, and the adhesive film F supported by the support plate 211 of the support part 210 is pulled in the peripheral direction and stretched. As a result, wrinkles or the like generated in the adhesive film F can be unfolded, and the stamper 10 can be effectively cleaned.

[0082] Referring to Figure 8 and Figure 9 , the stamper transfer head 20 moves the stamper 10. The stamper transfer head 20 moves the stamper 10 downward until the stamper 10 contacts the adhesive surface FS of the adhesive film F arranged on the support plate 211 through the opening 221-O of the upper driving unit 221. After that, the stamper transfer head 20 raises the stamper 10.

[0083] At this time, the adhesive film F can be fixed by the support suction cup 210-C above the support plate 211 so that the adhesive film F is not lifted together with the stamper 10.

[0084] Through this process, the stamper cleaning device SC1 can clean the stamper 10 by peeling off contaminants such as the light-emitting element LE remaining on one surface of the stamper 10 from one surface of the stamper 10.

[0085] Referring to Figure 10 and Figure 11 , the roll-to-roll unit 100 recovers the adhesive film F with contaminants attached to the adhesive surface FS of the adhesive film F ( Figure 4 in S130).

[0086] For example, referring to Figure 10, the upper driving part 221 and the lower driving part 222 are moved up and down to release the fixation of the adhesive film F. The upper driving part 221 is moved upward, and the lower driving part 222 is moved downward, thereby releasing the fixation of the adhesive film F. In addition, the suction function of the support suction cup 210-C is released at the upper part of the support plate 211, and the vertical moving part 212 is moved downward so that the adhesive film F can be moved.

[0087] Next, referring to Figure 11 , the first rolling part 110, the second rolling part 120, the third rolling part 130, the first guide roller 140, and the second guide roller 150 are rotated in one direction (clockwise direction). Thereby, the adhesive film F attached with contaminants is wound around the second rolling part 120 and recovered.

[0088] Figures 12 to 19 is a diagram schematically showing a step of a stamper cleaning method according to another embodiment.

[0089] Figure 12 is a cross-sectional view taken along the Figure 1 dotted line in Figure 12 Different from Figure 2 , the support part 210 does not move up and down, but the roll-to-roll unit 100 can move up and down. In addition, different from the stamper cleaning device SC1 of Figure 2 , the cleaning unit 200 includes a support plate 211 and a support suction cup 211-C and does not include a vertical moving part 212.

[0090] Referring to Figure 12 , the first rolling part 110 of the roll-to-roll unit 100 peels the release paper R of the composite paper film C from the adhesive film F and supplies the adhesive film F to the cleaning unit 200 in a roll-to-roll manner ( Figure 4 S110 in Figure 5 ). The supply operation has been described with reference to

[0091] Next, referring to Figures 13 to 16 , the cleaning unit 200 supports the adhesive film F during the period of cleaning by bonding the contaminants of the stamper 10 to the bonding surface FS of the adhesive film F ( Figure 4 S120 in

[0092] For example, referring to Figure 13, the upper driving part 221 and the lower driving part 222 move up and down toward the adhesive film F side to fix the adhesive film F. The upper driving part 221 moves downward and the lower driving part 222 moves upward to press the adhesive film F from above and below, thereby fixing the adhesive film F. During the period when the adhesive film F is fixed by the upper driving part 221 and the lower driving part 222, the roll-to-roll unit 100 can stop operating. The upper driving part 221 and the lower driving part 222 move after the operation of the roll-to-roll unit 100 stops.

[0093] Refer to Figure 14 , the driving part 220 and the roll-to-roll unit 100 move downward, and the adhesive film F supported by the support plate 211 of the support part 210 is pulled in the peripheral direction and stretched. Thus, wrinkles and the like generated in the adhesive film F can be unfolded, and the stamper 10 can be effectively cleaned.

[0094] Refer to Figure 15 and Figure 16 , the stamper transfer head 20 moves the stamper 10 downward until the stamper 10 contacts the adhesive surface FS of the adhesive film F arranged on the support plate 211 through the opening 221-O of the upper driving part 221. After that, the stamper transfer head 20 raises the stamper 10. At this time, the adhesive film F can be fixed by the support suction cup 210-C above the support plate 211 so that the adhesive film F is not lifted together with the stamper 10.

[0095] Through this process, the stamper cleaning device SC2 (which may also be referred to as the "second stamper cleaning device SC2") can peel off contaminants such as the light-emitting element LE remaining on one surface of the stamper 10 from one surface of the stamper 10 to clean the stamper 10.

[0096] Then, refer to Figures 17 to 19 , the roll-to-roll unit 100 recovers the adhesive film F with contaminants attached to the adhesive surface FS of the adhesive film F ( Figure 4 S130).

[0097] For example, refer to Figure 17 , the driving part 220 and the roll-to-roll unit 100 move upward to return to the original position.

[0098] Then, refer to Figure 18 , the upper driving part 221 and the lower driving part 222 move up and down to release the fixation of the adhesive film F. The release of the fixation of the adhesive film F has been described with reference to Figure 10 , and thus its detailed description will be omitted.

[0099] Next, refer to Figure 19, the first rolling part 110, the second rolling part 120, the third rolling part 130, the first guide roller 140, and the second guide roller 150 are rotated in one direction (clockwise). Thus, the adhesive film F with contaminants attached is wound around the second rolling part 120 and recovered.

[0100] Figure 20 is a perspective view showing the configuration of a stamper cleaning device according to an embodiment. Figure 21 is along Figure 20 the cross-sectional view taken along the dashed line of.

[0101] Referring to Figure 20 and Figure 21 , the stamper cleaning device SC3 (which may also be referred to as the "third stamper cleaning device SC3") as a device for removing the light-emitting elements LE etc. attached to the stamper 10 may include a roll-to-roll unit 100 and a cleaning unit 201.

[0102] Figure 20 and Figure 21 With Figure 1 and Figure 2 the difference between the stamper cleaning device SC1 is that the cleaning unit 201 is in the shape of a roller instead of a platform shape. In the embodiments of Figure 20 and Figure 21 the description repeated with the embodiments of Figure 1 and Figure 2 is omitted.

[0103] The roll-to-roll unit 100 supplies, in a roll-to-roll manner, the adhesive film F for bonding and separating the light-emitting elements LE attached to the stamper 10.

[0104] The cleaning unit 201 is arranged between the first guide roller 140 and the second guide roller 150.

[0105] The cleaning unit 201 can move up, down, left, and right. For the operation of the cleaning unit 201, reference will be made to Figure 4 , Figure 22 and Figure 26 for a detailed description.

[0106] Figures 22 to 26 is a diagram schematically showing a step of a stamper cleaning method according to an embodiment. Figures 22 to 26 The stamper cleaning device of Figure 21 can correspond to the stamper cleaning device of

[0107] Hereinafter, with reference to Figure 4 and Figures 21 to 26 , a stamper cleaning method according to an embodiment will be described.

[0108] First, referring to Figure 21, the roll-to-roll unit 100 peels the release paper R from the composite paper film C and supplies the adhesive film F to the cleaning unit 201 in a roll-to-roll manner ( Figure 4 at S110). The supply method of the adhesive film F has been described with reference to Figure 4 and thus its detailed description will be omitted.

[0109] With reference to Figures 22 to 25 , the cleaning unit 201 cleans by adhering the contaminants of the stamper 10 to the adhesive surface FS of the adhesive film F ( Figure 4 at S120).

[0110] With reference to Figure 22 , the cleaning unit 201 is moved upward (in the direction where the stamper 10 is located) to stretch the adhesive film F. Thus, wrinkles or the like generated in the adhesive film F can be unfolded and the stamper 10 can be effectively cleaned.

[0111] The roll-to-roll unit 100 can stop operating during the operation of the cleaning unit 201. For example, the cleaning unit 201 can move after the operation of the roll-to-roll unit 100 stops.

[0112] With reference to Figure 23 and Figure 24 , the stamper transfer head 20 moves the stamper 10 downward until the stamper 10 contacts the adhesive surface FS of the adhesive film F disposed on the cleaning unit 201. After that, the cleaning unit 201 is moved in the horizontal direction (for example, toward the second rolling part 120 side). By rotating the roller-type cleaning unit 201 in one direction, the adhesive surface FS of the adhesive film F is adhered to the entire one surface of the stamper 10. Thus, all the contaminants on one surface of the stamper 10 can be cleaned.

[0113] With reference to Figure 25 and Figure 26 , the roll-to-roll unit 100 recovers the adhesive film F with contaminants attached to the adhesive surface FS of the adhesive film F ( Figure 4 at S130).

[0114] For example, with reference to Figure 25 , the cleaning unit 201 is moved downward.

[0115] Next, with reference to Figure 26 , the first rolling part 110, the second rolling part 120, the third rolling part 130, the first guide roller 140, and the second guide roller 150 are rotated in one direction (clockwise direction), and the cleaning unit 201 is rotated in the opposite direction of the one direction (counterclockwise direction). Thus, the adhesive film F with contaminants attached is wound around the second rolling part 120 and recovered. In addition, the cleaning unit 201 is moved in the horizontal direction (for example, toward the first rolling part 110 side) to be located at the original position.

[0116] Figure 27 FIG. is a schematic view of an impression cleaning device according to another embodiment, Figure 28 which is used to illustrate Figure 27 the operation method of the impression cleaning device. Different from Figure 20 and Figure 21 the impression cleaning device SC3, for the impression cleaning device SC4 (also referred to as "the fourth impression cleaning device SC4") applicable to the roller-type impression 11 of Figure 27 , the first guide roller 140, the second guide roller 150, and the cleaning unit 201 are arranged above the adhesive film F.

[0117] Referring to Figure 27 and Figure 28 , the roller-type impression 11 is arranged below the impression cleaning device SC4. Therefore, in the impression cleaning device SC4, the adhesive surface FS of the adhesive film F faces downward. In addition, the cleaning unit 201 also moves downward to contact the roller-type impression 11. Then, the first rolling part 110, the second rolling part 120, the third rolling part 130, the first guide roller 140, the second guide roller 150, and the cleaning unit 201 are rotated in one direction (counterclockwise), and the roller-type impression 11 is rotated in the opposite direction of the one direction (clockwise). The operations other than this are similar to those of the impression cleaning device SC3 described with reference to Figures 20 to 26 .

[0118] As described in an embodiment, the impression cleaning devices SC1 to SC4 remove contaminants such as the light-emitting element LE remaining on the impressions 10 and 11, so that the number of times of use of the impressions 10 and 11 can be increased. Thus, the replacement cycle of the impressions 10 and 11 can be extended, and the product production time can be extended.

[0119] In addition, by stretching the adhesive film F before bonding the adhesive film F to the impressions 10 and 11, wrinkles that may occur in the adhesive film F can be removed, thereby increasing the impression cleaning efficiency.

[0120] As described above, embodiments of the present invention have been described with reference to the accompanying drawings. However, those of ordinary skill in the technical field to which the present invention pertains can understand that the present invention can be implemented in other specific forms without changing its technical concept or essential features. Therefore, the embodiments described above should be understood as being exemplary in all aspects and not restrictive.

Claims

1. An impression cleaning device, comprising: A roll-to-roll unit, including a first rolling part and a second rolling part arranged at a distance from the first rolling part, and moving the adhesive film from the first rolling part to the second rolling part; And A cleaning unit, arranged between the first rolling part and the second rolling part, stretching the adhesive film, and causing the stretched adhesive film to adhere to the contaminants adhered to the impression, thereby cleaning the contaminants on the impression, Wherein, the roll-to-roll unit winds the adhesive film adhered with the contaminants around the second rolling part.

2. The impression cleaning device according to claim 1, wherein, The cleaning unit includes a support part for supporting the adhesive film and a driving part capable of moving up and down, Wherein, the support part includes a support suction cup for fixing the adhesive film.

3. The impression cleaning device according to claim 2, wherein, The driving part includes an upper driving part and a lower driving part capable of moving up and down, Wherein, the upper driving part moves downward and the lower driving part moves upward to fix the adhesive film.

4. The impression cleaning device according to claim 3, wherein, The support part further includes an up-and-down moving part capable of moving up and down, Wherein, the driving part fixes the adhesive film, and the up-and-down moving part rises to stretch the adhesive film in the circumferential direction.

5. The impression cleaning device according to claim 3, wherein, The driving part fixes the adhesive film, and the roll-to-roll unit and the driving part move downward to stretch the adhesive film in the circumferential direction.

6. The impression cleaning device according to claim 1, wherein, The first rolling part supplies a composite paper film with a release paper attached to the adhesive film, and arranges the release paper in the outer direction of the first rolling part, The roll-to-roll unit further includes a third rolling part for separating the release paper from the composite paper film.

7. The impression cleaning device according to claim 1, wherein, The roll-to-roll unit further includes: A first guide roller, arranged between the first rolling part and the cleaning unit, and guiding the adhesive film; and A second guide roller, arranged between the second rolling part and the cleaning unit, and guiding the adhesive film.

8. The impression cleaning device according to claim 3, wherein, The upper driving part includes an opening part wider than the upper surface of the support part at a position overlapping with the support part.

9. The impression cleaning device according to claim 1, wherein, The contaminants include one or more of one or more light-emitting elements and dust.

10. The impression cleaning device according to claim 1, wherein, The cleaning unit is in the shape of a roller and can move up, down, left, and right, The cleaning unit moves in the direction where the impression is located to stretch the adhesive film in the circumferential direction so that the adhesive film adheres to the impression, The cleaning unit adheres to the impression and moves left and right.

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