KR100667088B1 - Tape-like donor film, tape-like donor film roll and laser induced thermal imaging apparatus having the tape-like donor film roll - Google Patents

Abstract

A tap type donor film, a tape type donor film roll and a laser thermal imaging apparatus having the same are provided to minimize damage of an imaging layer in case that a donor film is rolled by having a tape type donor film with a protrusion unit. A tape type donor film includes a base substrate(71), a photo thermal transform layer(73), an imaging layer(77), and protrusions(72). The base substrate(71) has an upper plane and a lower plane. The photo thermal transform layer(73) is located on the upper plane(73). The imaging layer(77) is located on the photo thermal transform layer(73). The protrusions(72) are located on both edges of at least one plane of the upper plane and the lower plane. The protrusion which is located on at least one edge of the protrusions(72) has protrusion patterns which are apart from each other. The protrusions(72) have a groove which penetrates the protrusions(72). The base substrate(71) has a hole corresponding to the groove.

Description

Tape-like donor film, tape-like donor film roll and laser induced thermal imaging apparatus having the tape-like donor film roll}

1 is a perspective view schematically showing a laser thermal transfer apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of portion A of FIG. 1.

3 is a top view of the laser thermal imager shown in FIG. 1.

4 is a cross-sectional view of the tape-type donor film according to the embodiment of the present invention taken along the cut line III-III ′ of FIG. 1.

FIG. 5 is an enlarged cross-sectional view of a portion of an organic light emitting diode substrate which is an example of the acceptor substrate of FIG. 1.

6 is a cross-sectional view taken along the line II ′ of FIG. 1.

FIG. 7 is a cross-sectional view taken along the line II-II ′ of FIG. 1.

8 is an enlarged cross-sectional view of a portion of an organic light emitting diode substrate having a patterned transfer layer.

9A and 9B are cross-sectional views of donor films according to other embodiments of the present invention.

10A and 10B are plan views of donor films according to other embodiments of the present invention.

11A and 11B are plan views of donor films according to other embodiments of the present invention.

12A is a plan view of donor films according to other embodiments of the present invention, and FIG. 12B is a cross-sectional view of a donor film roll with the donor film shown in FIG. 12A.

13 is a cross-sectional view showing a laser thermal transfer apparatus according to another embodiment of the present invention.

14 is a cross-sectional view showing a laser thermal transfer apparatus according to another embodiment of the present invention.

15A and 15B are cross-sectional views illustrating laser thermal transfer apparatuses according to other exemplary embodiments.

16 is a cross-sectional view showing a laser thermal transfer apparatus according to another embodiment of the present invention.

(Explanation of symbols for main parts of drawing)

115: chuck 50: acceptor substrate

70 donor substrate 150 lamination unit

155: transparent window 143: film feed roll

144: film supply roll 130: laser irradiation apparatus

120: optical stage

The present invention relates to a donor film, a donor film roll, and a laser thermal transfer apparatus, and more particularly, to a laser thermal transfer apparatus including a tape-type donor film, a tape-type donor film roll, and the tape-type donor film roll.

Generally a laser thermal transfer method requires at least a laser, an acceptor substrate and a donor film, said donor film comprising a base film, a light-to-heat conversion layer and a transfer layer. In the laser thermal transfer step, the donor film is laminated on the entire surface of the acceptor substrate with the transfer layer facing the acceptor substrate, and then the laser beam is irradiated onto the base film. The beam irradiated onto the base film is absorbed by the light-to-heat conversion layer and converted into thermal energy, and the transfer layer is transferred onto the acceptor substrate by the thermal energy. As a result, a transfer layer pattern is formed on the acceptor substrate. It is published in US Pat. Nos. 5,998,085, 6,214,520 and 6,114,088.

However, when laminating the donor film on the entire surface of the acceptor substrate as described above, the size of the donor film should also increase as the acceptor substrate becomes larger. In this case, it is difficult to uniformly deposit the transfer layer when manufacturing the donor film, and uniform lamination may be difficult.

To solve this problem, US Pat. No. 6,226,020 provides a method and apparatus for producing a print by means of laser-induced thermal transfer. According to the U.S. patent, the print generating apparatus includes a substrate cylinder on which a substrate is located, a supply roll for supplying a transfer tape, a supply roll for supplying the transfer tape, two contact rolls, and two guide rolls. The transfer tape is supplied from a roll, and the transferred transfer tape is contacted on the substrate by the contact roll via the guide roll. In addition, a pigment layer is formed on one surface of the transfer tape. Thus, while the transfer tape is wound on the feed roll, the pigment layer may come into contact with the transfer tape of another layer, thereby causing damage. In addition, the pigment layer may be damaged due to the friction when the transfer tape is released from the feed roll. This may be even more the case when the pigment layer is a fragile film such as an organic film.

The technical problem to be achieved by the present invention is to solve the problems of the prior art, a tape-type donor film, a tape-type donor film roll and a laser having the same that can minimize the damage of the transfer layer even when the roll is wound The present invention provides a heat transfer device.

One aspect of the present invention to achieve the above technical problem provides a tape-type donor film. The donor film includes a base substrate having an upper surface and a lower surface. The photothermal conversion layer is located on the upper surface. The transfer layer is positioned on the photothermal conversion layer. Projections are located on both edges of at least one of the upper surface and the lower surface.

Another aspect of the present invention to achieve the above technical problem provides a tape-type donor film roll. The donor film roll includes a shaft and a donor film wound around the shaft. The donor film has a base substrate having an upper surface and a lower surface, a photothermal conversion layer positioned on the upper surface, a transfer layer positioned on the photothermal conversion layer, and located on both edges of at least one of the upper surface and the lower surface. The protrusions are provided.

Another aspect of the present invention to achieve the above technical problem provides a laser thermal transfer apparatus. The laser thermal transfer apparatus includes a chuck for fixing an acceptor substrate. A donor film supplying roll having a shaft and a donor film wound around the shaft is positioned above one side of the chuck. The donor film has a base substrate having an upper surface and a lower surface, a photothermal conversion layer positioned on the upper surface, a transfer layer positioned on the photothermal conversion layer, and located on both edges of at least one of the upper surface and the lower surface. The protrusions are provided. The donor film receiving roll is positioned on the other side of the chuck. A lamination unit is located between the donor film supply roll and the donor film supply roll to laminate the donor film on the acceptor substrate using pneumatic pressure. A laser irradiation device for irradiating a laser beam on the laminated donor film passing through the lamination unit is disposed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to describe the present invention in more detail. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. In the figures, where a layer is said to be "on" another layer or substrate, it may be formed directly on the other layer or substrate, or a third layer may be interposed therebetween. Like numbers refer to like elements throughout the specification.

1 is a perspective view schematically showing a laser thermal transfer apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view showing an enlarged portion A of FIG. 1, and FIG. 3 is a top view of the laser thermal transfer apparatus shown in FIG. 1. Top view.

1, 2, and 3, the laser thermal imager 100 includes a substrate stage 110. The chuck 115 is positioned on the substrate stage 110. The substrate stage 110 includes a chuck guide bar 113 for moving the chuck 115 in the X direction. Therefore, the chuck 115 may move in the X direction along the chuck guide bar 113. The chuck 115 fixes the acceptor substrate 50 to be positioned on the chuck 115.

The optical stage 120 is disposed on the chuck 115 in a direction crossing the chuck 115. The laser irradiation device 130 is installed on the optical stage 120. The laser irradiation apparatus 130 may include a laser light source 131, a beam shaping element 132, a mask 135, and a projection lens 137. The laser source 131 is a device for generating a laser beam (L). The beam L generated from the laser source 131 passes through the beam shape modifying device 132. The beam shape modifying apparatus 132 may transform a beam having a Gaussian profile generated by the laser source 131 into a beam L_i having a homogenized flat-top profile. The homogenized beam L_i may pass through the mask 135. The mask 135 has at least one light transmission pattern or at least one light reflection pattern. In the drawings, only the light transmission patterns 135a are illustrated as an example, but is not limited thereto. The beam passing through the mask 135 may have an image L_m patterned by the patterns 135a. The beam with the patterned image L_m passes through the projection lens 137.

The optical stage 120 includes a laser guide bar 123 for moving the laser irradiation apparatus 130 in the Y direction. Further, the optical stage 120 is mounted on the upper surface of the optical stage 120, in detail, the laser guide bar 123 through the laser irradiator base 125.

A tape-like film supply roll 143 and a tape-like film winding roll 144 are installed on one side of the optical stage 120. That is, the film supply roll 143 and the film supply roll 144 are located at the upper side of one side of the chuck 115 and the upper side of the other side of the chuck 115, respectively. Since the tape-type donor film 70 has a smaller width than the width of the acceptor substrate 50, the uniformity in manufacturing the film compared to the case where a donor film similar to or larger than the width of the substrate 50 is manufactured. It is easier to secure. Meanwhile, the film supply roll 143 and the film supply roll 144 may apply a constant tension to the donor film 70.

A lamination unit 150 is installed between the film supply roll 143 and the film supply roll 144. The lamination unit 150 locally laminates the donor film 70 on the acceptor substrate 50 using air pressure. The laser irradiation device 130 is positioned on the lamination unit 150. The laser irradiation device 130 passes through the lamination unit 150 to irradiate a laser beam on the laminated donor film 70. That is, the lamination unit 150 has a light transmitting part in a passage through which the laser beam passes. Therefore, the laser thermal transfer apparatus 100 may perform a laser thermal transfer process simultaneously with lamination, and irradiate the laser beam to a portion where lamination is sufficient by irradiating the laser beam through the lamination unit 150. have. In addition, since bubbles are generated between the acceptor substrate 50 of the laminated portion and the donor film 70 because the local lamination is performed, the bubbles may be located in the non-laminated portion of the donor film 70 located at the periphery. And exit between the acceptor substrate 50. As a result, transfer failure due to bubbles can be prevented, and an excellent transfer pattern profile can be obtained.

The lamination unit 150 discharges a cavity 151a, a gas injection port 151b for injecting compressed gas Ca into the cavity 151a, and a gas injected into the cavity 151a onto the chuck. It may be provided with a body 151 having a gas outlet (151c). The donor film 70 may be laminated onto the acceptor substrate 50 by the pressure of the compressed gas Ca, and the gas discharged through the gas outlet 151c may be external to the lamination unit 150. While exhausting to form a predetermined gap between the body 151 and the donor film 70.

The lamination unit 150 may be provided at an upper portion of the body 151 and further include a light transmission window 155 in contact with the cavity 151a. In this case, the laser irradiated from the laser irradiation device 130 may be irradiated onto the donor film 70 through the light transmission window 155, the cavity 151a, and the gas outlet 151c. . Accordingly, the light transmission window 155, the cavity 151a, and the gas outlet 151c may constitute a light transmission portion. In this case, the gas injection hole 151b may be installed to penetrate the sidewall of the body 151. The body 151 of the lamination unit 150 may be a rectangular parallelepiped as shown in the drawing, but is not limited thereto and may be a cylindrical shape.

The lamination unit 150 and the laser irradiation apparatus 130 may be simultaneously transferred in the Y direction, which is the transfer direction of the laser irradiation apparatus 130. As an example of implementing this, the lamination unit 150 may be installed in the lamination unit base 141, and the lamination unit base 141 may be connected to the laser irradiator base 125. Thus, when the laser irradiation apparatus base 125 is transferred in the Y direction, the laser irradiation apparatus 130 and the lamination unit base 141 installed on the laser irradiation apparatus base 125 may also be transferred in the Y direction. have. As a result, the lamination unit 150 installed in the lamination unit base 141 may also be transferred in the Y direction.

Furthermore, the film supply roll 143 and the film supply roll 144 may be simultaneously transported in the Y direction together with the lamination unit 150. As an example of implementing this, the film supply roll 143 and the film supply roll 144 may be installed on the lamination unit base 141 while being spaced apart from the lamination unit 150 by a predetermined interval. Therefore, the laser irradiation apparatus 130, the lamination unit 150, the film supply roll 143 and the film supply roll 144 may all be transported together in the Y direction.

In addition, the lamination unit base 141 may include a lamination unit guide bar 142 for moving the lamination unit 150 in the vertical direction.

The optical stage 120, the laser irradiation device 130, the lamination unit 150, the film supply roll 143, and the film supply roll 144 are included in the laser thermal transfer print head H.

4 is a cross-sectional view of the tape-type donor film according to the embodiment of the present invention taken along the cut line III-III ′ of FIG. 1.

Referring to the drawings, the tape-shaped donor film 70 includes a base substrate 71 having an upper surface and a lower surface, and a light-to-heat conversion layer 73 and a transfer layer, which are sequentially positioned on the upper surface of the base substrate 71. 77 is provided. In addition, the protrusions 72 may be positioned on both edges of the bottom surface of the base substrate 71. The base substrate 71 may be a substrate formed of a transparent polymer organic material such as polyethylene terephthalate (PET). The photothermal conversion layer 73 is a film for converting incident light into heat, and may include aluminum oxide, aluminum sulfide, carbon black, graphite, or infrared dye, which are light absorbing materials. The transfer layer 77 may be an organic transfer layer when the acceptor substrate (50 in FIG. 1) is an organic light emitting diode substrate. The organic transfer layer 77 is at least one selected from the group consisting of a hole injection organic film, a hole transporting organic film, an electroluminescent organic film, a hole suppressing organic film, an electron transporting organic film and an electron injection organic film It can be.

The tape-type donor film 70 is wound in multiple layers on the shaft (143s or 144s in FIG. 1) to form a donor film supply roll 143 or a donor film supply roll 144. In this case, the protrusions 72 may prevent the transfer layer 77 from being damaged when the donor film 70 is wound in multiple layers on the shaft (143s or 144s of FIG. 1). In addition, the height of the protrusion 72 may be greater than the sum of the thicknesses of the various layers stacked on the base substrate 71, for example, the photothermal conversion layer 73 and the transfer layer 77.

FIG. 5 is an enlarged cross-sectional view of a portion of an organic light emitting diode substrate which is an example of the acceptor substrate of FIG. 1.

Referring to the drawing, the semiconductor layer 52 is positioned in a predetermined region on the substrate 51. The semiconductor layer 52 may be an amorphous silicon film or a polycrystalline silicon film obtained by crystallizing an amorphous silicon film. The gate insulating layer 53 is positioned on the semiconductor layer 52. A gate electrode 54 overlapping the semiconductor layer 52 is positioned on the gate insulating layer 53. A first interlayer insulating layer 55 covering the semiconductor layer 52 and the gate electrode 54 is disposed on the gate electrode 54. A source electrode 56 and a drain electrode penetrating the first interlayer insulating film 55 and the gate insulating film 53 on the first interlayer insulating film 55 and connected to both ends of the semiconductor layer 52, respectively. 57 is located. The semiconductor layer 52, the gate electrode 54, and the source / drain electrodes 56 and 57 form a thin film transistor T. A second interlayer insulating layer 58 is disposed on the source / drain electrodes 56 and 57 to cover the source / drain electrodes 56 and 57. The second interlayer insulating film 58 may include a passivation film for protecting the thin film transistor T and / or a planarization film for alleviating the step difference caused by the thin film transistor. The pixel electrode 59 is disposed on the second interlayer insulating layer 58 to pass through the second interlayer insulating layer 58 and to be connected to the drain electrode 57. The pixel electrode 59 may be, for example, an indium tin oxide (ITO) film or an indium zinc oxide (IZO) film. A pixel defining layer 60 having an opening 60a exposing a portion of the pixel electrode may be disposed on the pixel electrode 59.

Hereinafter, a laser thermal transfer method and a method of manufacturing an organic light emitting display device using the laser thermal transfer apparatus described with reference to FIGS. 1 and 2 will be described in detail.

FIG. 6 is a cross-sectional view taken along the line II ′ of FIG. 1, and FIG. 7 is a cross-sectional view taken along the line II-II ′ of FIG. 1.

1, 6, and 7, the acceptor substrate 50 is positioned on the chuck 115. The acceptor substrate 50 may be the organic light emitting diode substrate described with reference to FIG. 5.

The tape donor film 70 is placed on the acceptor substrate 50 by providing the film supply roll 143 and the film supply roll 144 on one side of the optical stage 120 (FIG. 1). The donor film 70 includes at least a photothermal conversion layer (73 in FIG. 4) and a transfer layer 77, and the transfer layer 77 is positioned to face the acceptor substrate 50.

Subsequently, the lamination unit 150 moves downward along the lamination unit guide bar 142. As a result, the donor film 70 under the lamination unit 150 may also move onto the acceptor substrate 50.

Subsequently, the compressed gas Ca is injected into the cavity 151a through the gas injection hole 151b of the lamination unit 150. In the present specification, the "compressed gas" refers to a gas pressure higher than the air pressure outside the lamination unit 150. The compressed gas injected into the cavity 151a is discharged through the gas outlet 151c. At this time, a portion of the donor film 70 may be locally laminated onto the acceptor substrate 50 by the pressure P of the compressed gas, and the gas discharged through the gas outlet 151c may be While being exhausted to the outside of the lamination unit 150, a predetermined gap may be formed between the body 151 and the donor film 70.

Subsequently, a laser beam is emitted from the laser source (131 of FIG. 2) of the laser irradiation apparatus 130, and the laser beam passes through the projection lens 137. The laser beam passing through the projection lens 137 passes through the light transmission part of the lamination unit 150, that is, the light transmission window 155, the cavity 151a, and the gas outlet 151c, and the donor film 70. ) Is irradiated. In this case, the pressure applied by the lamination unit 150 to the donor film, that is, the pressure P of the compressed gas may be parallel to the direction in which the laser beam is irradiated. Therefore, the transfer failure may be reduced by irradiating a laser beam to a portion where the donor film 70 is sufficiently laminated on the acceptor substrate 50. As a result, an excellent transfer pattern profile can be obtained.

In the region irradiated with the laser beam of the donor film 70, the photothermal conversion layer (73 of FIG. 4) absorbs the laser beam to generate heat, and the heat generating photothermal conversion layer (73 of FIG. 4). The transfer layer 77 at the lower portion of the transfer layer 77 is transferred to the acceptor substrate 50 due to the change in adhesion force with the photothermal conversion layer (73 in FIG. 4). As a result, a patterned transfer layer 77a is formed on the acceptor substrate 50.

Subsequently, the laser irradiator base 125 continuously moves along the Y-axis along the laser guide bar 123. Accordingly, the laser irradiation device 130 installed in the laser irradiation device base 125, the lamination unit base 141 connected to the laser irradiation device base 125, and the lamination unit installed in the lamination unit base 141 ( 150 and the film feed roll 143 / film feed roll 144 can also move continuously in the Y axis simultaneously. As a result, the lamination proceeds continuously in the Y direction, and the laser beam can be scanned in the Y direction.

At this time, the film supply roll 144 winds the donor film 70 at a speed synchronized with the speed at which the laser irradiator base 125, that is, the laser irradiator 130 moves. As a result, the portion with the unpatterned transfer layer 77 of the donor film 70 can be continuously positioned below the lamination unit 150. At this time, the lamination unit 150 may move on the donor film 70 without friction due to direct contact with the donor film 70 due to the distance between the body 151 and the donor film 70. have. Thus, when the transfer layer of the donor film 70 is an organic film, damage to the organic film may be minimized.

When the laser irradiation device 130 reaches the edge of the acceptor substrate 50, no compressed gas is supplied to the lamination unit 150, and the lamination unit 150 is the lamination unit guide bar 142. Move to the top along. As a result, the donor film 70 under the lamination unit 150 is detached from the acceptor substrate.

Subsequently, the chuck 115 moves one step along the chuck guide bar 113 and repeats the lamination and laser irradiation described above.

8 is an enlarged cross-sectional view of a portion of an organic light emitting diode substrate having a patterned transfer layer.

Referring to the drawings, the transfer layer pattern 77a is positioned on the pixel electrode 55 exposed in the opening 60a of the organic light emitting diode substrate described with reference to FIG. 5. The transfer layer pattern 77a may be a light emitting layer. Furthermore, the transfer layer pattern 77a may further include at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, a hole suppression layer, an electron transport layer, and an electron injection layer.

9A and 9B are cross-sectional views of donor films according to other embodiments of the present invention. The donor films according to the present embodiments are the same as the donor film described with reference to FIG. 4 except for the following description.

9A and 9B, the protrusions 72_1 may be positioned on the top surface of the base substrate 71 (FIG. 9A), and the protrusions 72_2a on the top and bottom surfaces of the base substrate 71. 72_2b) may be located (FIG. 9B).

10A and 10B are plan views of donor films according to other embodiments of the present invention. The donor films according to the present embodiments are the same as the donor films described with reference to FIGS. 2 and 4 except for the following description.

10A and 10B, the protrusions disposed on at least one edge of the protrusions may include protrusion patterns 72_3 and 72_4 spaced apart from each other. The protrusion patterns 72_3 and 72_4 may be in the form of a rectangle 72_3 or a circle 72_4, but are not limited thereto. The tapered donor films including the protrusions may be more flexibly wound around the shafts (143s and 144s of FIG. 1) due to the protrusion patterns 72_3 and 72_4 spaced apart from each other.

11A and 11B are plan views of donor films according to other embodiments of the present invention. The donor films according to the present embodiments are the same as the donor films described with reference to FIGS. 2 and 4 except for the following description.

11A and 11B, at least one protrusion 72_5b and 72_6b may be further disposed between the protrusions 72_5a and 72_6a positioned on both edges of the top and / or bottom surfaces of the base substrate 71. have.

Meanwhile, the transfer layer may include a plurality of transfer patterns 77_5, 77_6a, 77_6b, and 77_6c extending in the extension direction of the tape donor film. In this case, the additional protrusions 72_5b and 72_6b may be located between the transfer patterns 77_5, 77_6a, 77_6b, and 77_6c. The transfer patterns 77_5, 77_6a, 77_6b, and 77_6c may be the same color transfer patterns 77_5, or may be different color transfer patterns 77_6a, 77_6b, 77_6c. The different color transfer patterns 77_6a, 77_6b, and 77_6c may be red, green, and blue transfer patterns, respectively. Thus, multicolor printing can be performed using a set of film rolls.

12A is a plan view of donor films according to other embodiments of the present invention, and FIG. 12B is a cross-sectional view of a donor film roll with the donor film shown in FIG. 12A. The donor films according to the present embodiments are the same as the donor film described with reference to FIGS. 1, 2 and 4 except for the following description.

12A and 12B, the protrusion 72_7 includes a groove 72_7a penetrating through the protrusion 72_7, and the base substrate 71 includes a hole 71a corresponding to the groove 72_7a. do. In this case, the shaft S has a pin Sa penetrating the hole 71a and the groove 72_7a. The pin Sa may apply an appropriate tension to the donor film, thereby accurately controlling the winding speed of the donor film.

13 is a cross-sectional view showing a laser thermal transfer apparatus according to another embodiment of the present invention. The laser thermal transfer apparatus according to the present embodiment is the same as the laser thermal transfer apparatus described with reference to FIGS. 1 to 8 except as described below.

Referring to FIG. 13, the film supply roll 143_1 and the film supply roll 144_1 are not installed on the lamination unit base 141 of FIG. 1, but are installed on both side support portions of the optical stage 120. In this case, the film supply roll 143_1 and the film supply roll 144_1 do not operate when the laser beam is scanned using the laser irradiation device 130 and the lamination unit 150, and the optical stage ( After 120 or chuck 115 has been moved one step, it may be operated prior to starting scanning to spread new donor film 70 on acceptor substrate 50.

14 is a cross-sectional view showing a laser thermal transfer apparatus according to another embodiment of the present invention. The laser thermal transfer apparatus according to the present embodiment is the same as the laser thermal transfer apparatus described with reference to FIGS. 1 to 8 except as described below.

Referring to FIG. 14, a red print head H _R , a green print head H _G , and a blue print head H _B are positioned. The red, green and blue print heads H _R , H _G , H _B are located on the chuck and are installed in the red, green and blue optical stages 120R, 120G, 120B across the chuck, respectively. Each print head has the same structure as the print head described with reference to FIGS. 1 to 8. That is, a film supply roll 143, a film supply roll 144, a laser irradiation device 130, and a lamination unit 150 are installed on one side of each of the optical stages 120R, 120G, and 120B. In addition, the red, green, and blue print heads H _R , H _G , and H _B may include a red donor film 70R having a red transfer layer 77R and a green donor film 70G having a green transfer layer 77G. ) And a blue donor film 70B on which a blue transfer layer 77B is formed.

By using such a laser thermal transfer apparatus, multicolor transfer layer patterns P _R , P _G , and P _B can be formed on the acceptor substrate in a shorter time. As a result, productivity can be improved.

15A and 15B are cross-sectional views illustrating laser thermal transfer apparatuses according to other exemplary embodiments. The laser thermal transfer apparatus according to the present embodiment is the same as the laser thermal transfer apparatus described with reference to FIGS. 1 to 8 except as described below.

15A and 15B, the donor film 70 includes a plurality of transfer patterns extending in the extending direction of the donor film 70, that is, the red transfer pattern 77R, the green transfer pattern 77G, and the blue transfer. The pattern 77B is provided. In this case, the donor film may be the donor film described with reference to FIG. 11B. The transfer patterns 77R, 77G, and 77B may share a lamination unit. Furthermore, the transfer patterns 77R, 77G, and 77B may share a laser irradiation device (FIG. 15A). On the contrary, the laser thermal imager irradiates a laser beam to the red, green and blue transfer patterns 77R, 77G, and 77B, respectively, a red laser irradiation device 130R, a green laser irradiation device 130G, and a blue laser irradiation. Device 130B may be provided (FIG. 15B).

By using such a laser thermal transfer apparatus, a multicolor transfer layer pattern can be formed on an acceptor substrate in a shorter time. As a result, productivity can be improved.

16 is a cross-sectional view showing a laser thermal transfer apparatus according to another embodiment of the present invention. The laser thermal transfer apparatus according to the present embodiment is the same as the laser thermal transfer apparatus described with reference to FIG. 15B except as described below.

Referring to FIG. 16, laser irradiation devices 130R, 130G, and 130B and a lamination unit 150 are installed on one side of the optical stage 120. However, the film supply roll 143 and the film supply roll 144 are located on one side and the other side of the optical stage 120, respectively. The laser irradiation devices 130R, 130G, and 130B, the lamination unit 150, the film supply roll 143, and the film supply roll 144 are included in a print head.

Meanwhile, the donor film 70 includes a plurality of transfer patterns extending in the extending direction of the donor film 70, that is, a red transfer pattern 77R, a green transfer pattern 77G, and a blue transfer pattern 77B. . In this case, the donor film may be the donor film described with reference to FIG. 11B. The transfer patterns 77R, 77G, and 77B may share the lamination unit 150. Further, the transfer patterns 77R, 77G, and 77B may include a red laser irradiation device 130R and a green laser irradiation device that irradiate a laser beam to the red, green, and blue transfer patterns 77R, 77G, and 77B, respectively. 130G) and a blue laser irradiation device 130B. Alternatively, the transfer patterns 77R, 77G, and 77B may share a laser irradiation apparatus.

In the laser thermal transfer apparatus, a laser beam scanning process is performed simultaneously with the transfer of the acceptor substrate 50, that is, the chuck 115, while the optical stage 120 is fixed. After the scanning process is completed, the print head transfers one step along the optical stage 120, and then performs a laser beam scanning process simultaneously with the transfer of the chuck 115.

According to the present invention as described above, by providing a tape-shaped donor film having a projection, damage to the transfer layer can be minimized even when the donor film is wound on a roll.

Claims (24)

A base substrate having an upper surface and a lower surface; A photothermal conversion layer on the upper surface; A transfer layer on the photothermal conversion layer; And Tape-type donor film, characterized in that it comprises projections located on both edges of at least one of the upper surface and the lower surface. The method of claim 1, Tapered donor film, characterized in that the projections located on at least one edge of the projections having projection patterns spaced apart from each other. The method of claim 1, The protrusion has a groove passing through the protrusion, The base substrate has a tape-type donor film, characterized in that it comprises a hole corresponding to the groove. The method of claim 1, Tape-type donor film further comprises at least one projection located between the projections. The method of claim 1, The transfer layer is a tape-type donor film, characterized in that it comprises a plurality of transfer patterns extending in the extending direction of the donor film. The method of claim 5, Tape-type donor film further comprises a projection located between the transfer pattern. The method of claim 5, The transfer pattern is a tape-type donor film, characterized in that different color transfer patterns. shaft; And A donor film wound around the shaft, wherein the donor film includes a base substrate having an upper surface and a lower surface, a photothermal conversion layer positioned on the upper surface, a transfer layer positioned on the photothermal conversion layer, and the upper surface and the lower surface Tapered donor film rolls having projections located on both side edges of at least one side of the. The method of claim 8, Tapered donor film roll, characterized in that the protrusions located on at least one edge of the protrusions having protrusion patterns spaced apart from each other. The method of claim 8, The protrusion has a groove passing through the protrusion, Tape base donor film roll, characterized in that the base substrate has a hole corresponding to the groove. The method of claim 10, And the shaft protrudes from the shaft and includes a pin penetrating the hole and the groove. The method of claim 8, Tape-type donor film roll further comprises at least one projection located between the projections. The method of claim 8, The transfer layer is a tape-type donor film roll, characterized in that it comprises a plurality of transfer patterns extending in the extending direction of the donor film. The method of claim 13, The transfer pattern is a tape-type donor film roll, characterized in that the different color transfer patterns. A chuck holding the acceptor substrate; A donor film supply roll having a shaft and a donor film wound around the shaft is positioned on an upper side of the chuck, the donor film having a top substrate and a bottom substrate, a photothermal conversion layer positioned on the top surface, and the light heat. A transfer layer positioned on the conversion layer and protrusions positioned on both edges of at least one of the upper surface and the lower surface, A donor film supply roll positioned on the other side of the chuck; A lamination unit, positioned between the donor film supply roll and the donor film supply roll, for laminating a donor film on the acceptor substrate using pneumatic pressure; And And a laser irradiation device penetrating the lamination unit to irradiate a laser beam onto the laminated donor film. The method of claim 15, The protrusions have grooves passing through the protrusions, The base substrate has a hole corresponding to the groove, And the shaft has a pin protruding from the shaft and penetrating the hole and the groove. The method of claim 15, The lamination unit may include a body having a cavity, a gas inlet for injecting compressed gas into the cavity, and a gas outlet for discharging the gas injected into the cavity onto the substrate; And a light transmission window installed at an upper portion of the body and in contact with the cavity. The method of claim 15, And the transfer layer includes red, green, and blue transfer patterns extending in an extension direction of the donor film. The method of claim 18, And the laser irradiator includes a red laser irradiator, a blue laser irradiator, and a green laser irradiator for irradiating a laser beam onto the red, green, and blue transfer patterns, respectively. The method of claim 15, An optical stage positioned on the chuck and traversing the chuck, And the donor film supply roll and the donor film supply roll are located on the same side of the optical stage. The method of claim 15, An optical stage positioned on the chuck and traversing the chuck, And the donor film supply roll and the donor film supply roll are located on one side and the other side of the optical stage, respectively. The method of claim 15, Further comprising red, green and blue optical stages positioned on the chuck and across the chuck, And a donor film supply roll, a donor film supply roll, and the lamination unit on one side of each optical stage. The method of claim 15, The transfer layer is at least one organic film selected from the group consisting of a hole injection organic film, a hole transporting organic film, an electroluminescent organic film, a hole suppressing organic film, an electron transporting organic film and an electron injection organic film Laser thermal transfer apparatus, characterized in that. The method of claim 15, And the acceptor substrate is an organic light emitting device substrate.

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