Source: https://patents.google.com/patent/KR20130004830A/en
Timestamp: 2020-04-03 01:48:49
Document Index: 485146767

Matched Legal Cases: ['art 610', 'art 610', 'art 614', 'art 610', 'art 614', 'art 614', 'art 730', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 620', 'art 634', 'art 634', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 614', 'art 634', 'art 614', 'art 614', 'art 614', 'art 614', 'art 620', 'art 634', 'art 614']

KR20130004830A - Apparatus for thin layer deposition and method for manufacturing of organic light emitting display apparatus using the same - Google Patents
KR20130004830A
KR20130004830A KR1020110066124A KR20110066124A KR20130004830A KR 20130004830 A KR20130004830 A KR 20130004830A KR 1020110066124 A KR1020110066124 A KR 1020110066124A KR 20110066124 A KR20110066124 A KR 20110066124A KR 20130004830 A KR20130004830 A KR 20130004830A
KR1020110066124A
남명우
2011-07-04 Application filed by 삼성디스플레이 주식회사 filed Critical 삼성디스플레이 주식회사
2011-07-04 Priority to KR1020110066124A priority Critical patent/KR20130004830A/en
2013-01-14 Publication of KR20130004830A publication Critical patent/KR20130004830A/en
The present invention provides an electrostatic chuck for fixing a substrate to be deposited, a vacuum chamber, a deposition unit including a thin film deposition assembly for depositing a thin film on a substrate disposed inside the chamber and fixed to the electrostatic chuck, and the substrate. A first circulation portion for moving the fixed electrostatic chuck into the deposition portion, wherein the first circulation portion penetrates into the chamber when passing through the deposition portion, and the first circulation portion moves the electrostatic chuck in one direction. An organic layer deposition apparatus including a guide unit including an accommodation unit accommodating the electrostatic chuck and a method of manufacturing the organic light emitting display device using the same are provided.
Organic layer deposition apparatus and method for manufacturing organic light emitting display device using the same {Apparatus for thin layer deposition and method for manufacturing of organic light emitting display apparatus using the same}
Embodiments of the present invention relate to an organic layer deposition apparatus and a method of manufacturing an organic light emitting display device using the same. In detail, the thin film deposition apparatus and the organic light emitting display using the same can be easily applied to a large-scale substrate mass production process. A method for manufacturing a device.
Of the display devices, the organic light emitting display device has a wide viewing angle, excellent contrast, and fast response speed, and is receiving attention as a next generation display device.
In general, an organic light emitting display device has a stacked structure in which a light emitting layer is inserted between an anode and a cathode so that colors can be realized on the principle that holes and electrons injected from the anode and the cathode recombine in the light emitting layer to emit light. However, such a structure makes it difficult to obtain high-efficiency light emission. Therefore, intermediate layers such as an electron injection layer, an electron transport layer, a hole transport layer, and a hole injection layer are selectively inserted between each electrode and the light emitting layer.
An object of the present invention is to provide an organic layer deposition apparatus which can be easily manufactured, can be easily applied to a large-scale substrate mass production process, and has an improved manufacturing yield and deposition efficiency, and a method of manufacturing an organic light emitting display device using the same.
The organic layer deposition apparatus according to an embodiment of the present invention, the thin film deposition for depositing a thin film on the electrostatic chuck to fix the substrate for deposition, the chamber maintained in vacuum, the substrate disposed inside the chamber and fixed to the electrostatic chuck A deposition unit including an assembly, and a first circulation unit for moving the electrostatic chuck on which the substrate is fixed into the deposition unit, wherein the first circulation unit penetrates into the chamber when passing through the deposition unit. The first circulation part may include a guide part including a receiving part accommodating the electrostatic chuck so that the electrostatic chuck can be moved in one direction.
In the present invention, the loading unit for fixing the substrate to the electrostatic chuck, and the unloading unit for separating the substrate is completed from the electrostatic chuck may be further provided.
In the present invention, the first circulation portion may be sequentially moved to the loading portion, the deposition portion and the unloading portion.
In the present invention, the unloading unit may further include a second circulation unit for returning the electrostatic chuck separated from the substrate to the loading unit.
In the present invention, the guide portion may include a driving portion for generating a driving force to move the electrostatic chuck, and a magnetic levitation bearing to float in the receiving portion so that the electrostatic chuck can move in non-contact with the receiving portion. have.
In the present invention, the driving unit may be a linear motor.
In the present invention, the linear motor may include a magnetic rail disposed on one side of the electrostatic chuck and a coil disposed on the receiving portion.
In the present invention, the magnetic levitation bearing is composed of a side magnetic levitation bearing disposed on the other side of the electrostatic chuck and an upper magnetic levitation bearing disposed on the electrostatic chuck, and the driving part may be disposed on one side of the electrostatic chuck.
In the present invention, a gap sensor for measuring the gap between the receiving portion and the electrostatic chuck may be further provided.
In the present invention, the receiving portion may be provided with a receiving groove that can accommodate both sides of the electrostatic chuck.
In the present invention, a plurality of thin film deposition assemblies may be provided in the chamber.
In the present invention, the chamber may include a first chamber and a second chamber each having a plurality of thin film deposition assemblies therein, and the first chamber and the second chamber may be connected to each other.
In the present invention, the thin film deposition assembly, a deposition source for emitting a deposition material, a deposition source nozzle unit disposed on one side of the deposition source, a plurality of deposition source nozzles are formed along a first direction, and the A patterning slit sheet disposed to face the deposition source nozzle unit and having a plurality of patterning slits formed along a second direction perpendicular to the first direction, wherein the substrate is formed to be spaced apart from the organic layer deposition apparatus by a predetermined degree And may be formed to be relatively movable with respect to the organic layer deposition apparatus.
In the present invention, the thin film deposition assembly, a deposition source for emitting a deposition material, a deposition source nozzle unit disposed on one side of the deposition source, a plurality of deposition source nozzles are formed along a first direction, and the A patterning slit sheet disposed to face the deposition source nozzle portion and having a plurality of patterning slits formed along the first direction, and disposed in the first direction between the deposition source nozzle portion and the patterning slit sheet, And a blocking plate assembly having a plurality of blocking plates for partitioning a space between a deposition source nozzle unit and the patterning slit sheet into a plurality of deposition spaces, wherein the substrate is formed to be spaced apart from the organic layer deposition apparatus by a predetermined degree. It may be formed to be relatively movable relative to the organic layer deposition apparatus.
In the present invention, the patterning slit sheet may be fixedly coupled to the inside of the chamber.
In the present invention, the patterning slit sheet may be formed smaller than the substrate.
In the present invention, the width of the patterned slit sheet in the second direction may be formed to be substantially the same as the width of the substrate in the second direction.
In the present invention, the deposition source, the deposition source nozzle unit and the patterning slit sheet may be integrally formed by being coupled by a connecting member.
In the present invention, the connection member may guide the movement path of the deposition material.
In the present invention, the connection member may be formed to seal the space between the deposition source and the deposition source nozzle unit and the patterning slit sheet from the outside.
In the present invention, the plurality of deposition source nozzles may be tilted at a predetermined angle.
In the present invention, the plurality of deposition source nozzles include two rows of deposition source nozzles formed along the first direction, and the two rows of deposition source nozzles are to be tilted in a direction facing each other. Can be.
In the present invention, the plurality of deposition source nozzles include two rows of deposition source nozzles formed along the first direction, the plurality of deposition source nozzles being disposed on a first side of the deposition source nozzles of the two rows. Deposition source nozzles are arranged to face the second side end of the patterning slit sheet, and deposition source nozzles disposed on the second side of the two rows of deposition source nozzles face the first side end of the patterning slit sheet. Can be arranged to view.
In the present invention, each of the plurality of blocking plates may be formed to extend in a second direction substantially perpendicular to the first direction.
In the present invention, the plurality of blocking plates may be arranged at equal intervals.
In the present invention, the blocking plate assembly may include a first blocking plate assembly having a plurality of first blocking plates and a second blocking plate assembly having a plurality of second blocking plates.
In the present invention, each of the plurality of first blocking plates and the plurality of second blocking plates is formed in a second direction substantially perpendicular to the first direction, so that the deposition source nozzle unit and the patterning slit sheet The space between can be partitioned into a plurality of deposition spaces.
In the present invention, each of the plurality of first blocking plates and the plurality of second blocking plates may be disposed to correspond to each other.
In the present invention, the first blocking plate and the second blocking plate corresponding to each other may be disposed to be substantially on the same plane.
In the present invention, the deposition source and the blocking plate assembly may be spaced apart from each other.
In the present invention, the blocking plate assembly and the patterning slit sheet may be spaced apart from each other.
A method of manufacturing an organic light emitting display device according to an exemplary embodiment of the present invention includes fixing a substrate with an electrostatic chuck and maintaining the electrostatic chuck on which the substrate is fixed in a vacuum using a first circulation unit installed to penetrate the chamber. Transporting into the chamber, using a thin film deposition assembly disposed in the chamber, and depositing an organic film on the substrate by relative movement of the substrate and the thin film deposition assembly, wherein the electrostatic chuck includes: It may be transferred in the chamber in a non-contact manner with the first circulation.
In the present invention, after the organic film deposition step, the step of removing the substrate from the deposition is completed using the first circulation unit from the chamber, separating the substrate is completed deposition from the electrostatic chuck, and separated from the substrate The method may further include the step of returning the electrostatic chuck to the step of fixing the substrate to the electrostatic chuck using a second circulation unit provided outside the chamber.
In the present invention, a plurality of thin film deposition assemblies may be provided in the chamber, and the thin film deposition assemblies may be continuously deposited on the substrate.
In the present invention, the chamber is provided with a plurality of thin film deposition assemblies, respectively, therein comprises a first chamber and a second chamber associated with each other, the substrate is moved across the first chamber and the second chamber Deposition can occur continuously.
In the present invention, the first circulation portion, a guide portion including a receiving portion for receiving the electrostatic chuck so that the electrostatic chuck can be moved in one direction, a linear motor for generating a driving force to move the electrostatic chuck, and The electrostatic chuck may be provided with a magnetic levitation bearing to float in the receiving portion so that the electrostatic chuck can move in non-contact with the receiving portion.
According to the embodiments of the present invention made as described above, it is easy to manufacture, can be easily applied to the mass production process of the substrate, it is possible to obtain the effect of improving the production yield and deposition efficiency.
1 is a system configuration diagram schematically showing an organic layer deposition apparatus according to an embodiment of the present invention.
2 is a system configuration diagram illustrating a modification of FIG. 1.
3 is a schematic diagram illustrating an example of an electrostatic chuck.
4 is a cross-sectional view illustrating a cross section of the first circulation unit according to an exemplary embodiment of the present invention.
5 is a cross-sectional view illustrating a cross section of a second circulation unit according to an exemplary embodiment of the present invention.
6 is a perspective view schematically illustrating an organic layer deposition assembly of the organic layer deposition apparatus of FIG. 1.
Figure 7 is a schematic side cross-sectional view of the organic layer deposition assembly of Figure 6;
Figure 8 is a schematic top cross-sectional view of the organic layer deposition assembly of Figure 6;
9 is a perspective view schematically showing an organic layer deposition assembly according to another embodiment of the present invention.
10 is a schematic perspective view of an organic layer deposition assembly according to another embodiment of the present invention.
11 illustrates an organic layer deposition assembly according to another embodiment of the present invention.
12 is a cross-sectional view of an active matrix organic light emitting display device manufactured using the organic layer deposition apparatus of the present invention.
The first inversion chamber 718 is provided adjacent to the introduction chamber 716, and the first inversion robot 719 located in the first inversion chamber 718 inverts the electrostatic chuck 600 so as to electrostatic chuck 600. Is mounted on the first circulation portion 610 of the deposition unit 730.
As shown in FIG. 3, an electrostatic chuck 600 is embedded with an electrode 602 to which power is applied to a body 601 made of ceramic, and a high voltage is applied to the electrode 602. In this way, the substrate 500 is attached to the surface of the main body 601.
As shown in FIG. 1, the introduction robot 714 places the substrate 500 on an upper surface of the electrostatic chuck 600, and in this state, the electrostatic chuck 600 is transferred to the introduction chamber 716, and the first inverting robot As the 719 inverts the electrostatic chuck 600, the substrate 500 is positioned downward in the deposition unit 730.
The configuration of the unloading unit 720 is opposite to that of the loading unit 710 described above. That is, the substrate 500 and the electrostatic chuck 600 which have passed through the deposition unit 730 are inverted from the second inversion chamber 728 to the second inversion robot 729 to the transport chamber 726, and the transport robot ( The 724 removes the substrate 500 and the electrostatic chuck 600 from the discharge chamber 726, and then separates the substrate 500 from the electrostatic chuck 600 and loads the second rack 722. The electrostatic chuck 600 separated from the substrate 500 is returned to the loading unit 710 through the second circulation unit 620.
Meanwhile, according to an exemplary embodiment of the present invention according to FIG. 1, the electrostatic chuck 600 to which the substrate 500 is fixed is at least a deposition unit 730 by the first circulation unit 610, preferably The electrostatic chuck 600 which is sequentially moved to the loading unit 710, the deposition unit 730, and the unloading unit 720, and is separated from the substrate 500 at the unloading unit 720 may be a second circulation unit ( 620 is returned to the loading unit 710.
The first circulation part 610 moves the electrostatic chuck 600 holding the substrate 500. The first circulation part 610 may include a frame 611, a lower plate 613, a first guide part 614, and a seat support 615.
The frame 611 forms a base of the first circulation part 610 and is formed in a substantially hollow box shape. Here, the lower plate 613 may form a lower surface of the frame 611, and the deposition source 10 may be disposed on the lower plate 613. The frame 611 and the lower plate 613 may be formed as a separate member and combined, or may be integrally formed from the beginning.
Although not shown in the drawing, the lower plate 613 on which the deposition source 10 is disposed may be formed in a cassette form and drawn out from the frame 611 to the outside. Therefore, replacement of the deposition source 10 can be facilitated.
Meanwhile, the sheet support 615 may protrude from the inner side of the frame 611 and may serve to support the patterned slit sheet 150. In addition, the sheet support 615 may guide the movement path of the deposition material so that the deposition material discharged through the deposition source nozzle is not dispersed.
The first guide part 614 is disposed on the frame 611 and serves to guide the electrostatic chuck 600 to move in one direction. The first guide part 614 is installed to penetrate the first chamber 731 of the deposition part 730.
The first guide part 614 accommodates both sides of the electrostatic chuck 600 to guide the electrostatic chuck 600 to move. The first guide part 614 includes a first accommodating part 614a disposed below the electrostatic chuck 600, a second accommodating part 614b disposed on the electrostatic chuck 600, and a first accommodating part 614a. And a connection part 614c connecting the second accommodation part 614b to each other. The accommodation groove 614d is formed by the first accommodation portion 614a, the second accommodation portion 614b, and the connecting portion 614c. One side of the electrostatic chuck 600 is accommodated in the receiving groove 614d, the electrostatic chuck 600 moves along the receiving groove 614d.
On one side of the connecting portion 614c in the receiving groove 614d, the driving unit 616 is disposed to correspond to one side of the electrostatic chuck 600, and the side magnetic levitation bearing 618 is disposed to correspond to the other side of the electrostatic chuck 600. do.
The driver 616 may be a linear motor. The linear motor is a device having a very high positioning coefficient because the friction coefficient is small and the position error is hardly generated as compared with the conventional sliding wife system. The linear motor may include a coil 616a and a magnetic rail 616b. The coil 616a is disposed at one side of the connection part 614c of the first guide part 614, and the magnetic rail 616b is disposed at one side of the electrostatic chuck 600 corresponding to the coil 616a. Since the magnetic rail 616b instead of the coil 616a is disposed on the electrostatic chuck 600, which is a moving object, the electrostatic chuck 600 may be driven without applying power to the electrostatic chuck 600.
The side magnetic levitation bearing 618 is disposed in the connection part 614c of the first guide part 614 to correspond to the other side of the electrostatic chuck 600. The side magnetic levitation bearing 618 generates a gap between the electrostatic chuck 600 and the first guide part 614 so that the side magnetic levitation bearing 618 does not come into contact with the first guide part 614 when the electrostatic chuck 600 moves. It serves to move along the one guide portion 614.
In addition, the upper magnetic levitation bearing 617 may be disposed in the second receiving portion 614b to be positioned on the electrostatic chuck 600. The upper magnetic levitation bearing 617 moves along the first guide part 614 while the electrostatic chuck 600 does not contact the first accommodating part 614a and the second accommodating part 614b and maintains a constant distance therefrom. It plays a role. Although not shown in the drawings, the magnetic levitation bearing may be disposed in the first accommodating part 614a to correspond to the lower portion of the electrostatic chuck 600.
The first guide part 614 may further include a gap sensor 621. The gap sensor 621 may measure a distance between the electrostatic chuck 600 and the first guide part 614. Referring to FIG. 4, the gap sensor 621 may be disposed in the first accommodating part 614a to correspond to the lower portion of the electrostatic chuck 600. The gap sensor 621 disposed in the first accommodating part 614a may measure a distance between the first accommodating part 614a and the electrostatic chuck 600. In addition, a gap sensor 622 may be disposed in the lateral magnetic levitation bearing 618. The gap sensor 622 disposed on the lateral magnetic levitation bearing 618 may measure a gap between the side of the electrostatic chuck 600 and the lateral magnetic levitation bearing 618. The present invention is not limited thereto, and the gap sensor 622 may be disposed at the connection part 614c.
The magnetic force of the magnetic levitation bearings 617 and 618 is changed according to the values measured by the gap sensors 621 and 622 so that the gap between the electrostatic chuck 600 and the first guide part 614 may be adjusted in real time. . Precise movement of the electrostatic chuck 600 is possible by feedback control using the magnetic levitation bearings 617 and 618 and the gap sensors 621 and 622.
The second circulation part 620 may include a second guide part 634 for moving the electrostatic chuck 600 from which the substrate 500 is separated.
The second guide part 634 may include a first accommodating part 614a, a second accommodating part 614b, and a connecting part 614c. The electrostatic chuck 600 is accommodated in the accommodating groove 614d formed by the first accommodating part 614a, the second accommodating part 614b, and the connecting part 614c, and the electrostatic chuck 600 receives the accommodating groove 614d. Move along.
The driving unit 616 is disposed at the connecting portion 614c so as to correspond to one side of the electrostatic chuck 600. The driver 616 generates a driving force for moving the electrostatic chuck 600 along the guide part 634. The driving unit 616 may be a linear motor, and includes a coil 616a disposed at the connection unit 614c and a magnetic rail 616b disposed at one side of the electrostatic chuck 600 to correspond to the coil 616a. can do.
The side magnetic levitation bearing 618 is disposed in the connection part 614c of the first guide part 614 to correspond to the other side of the electrostatic chuck 600. The upper magnetic levitation bearing 617 may be disposed in the second receiving portion 614b to be positioned on the electrostatic chuck 600. The magnetic levitation bearings 617 and 618 generate a gap between the electrostatic chuck 600 and the first guide part 614 so that the magnetic levitation bearing 661 does not come into contact with the first guide part 614 when the electrostatic chuck 600 moves. It serves to move along the first guide portion 614.
The second circulation part 620 may further include gap sensors 621 and 622 to measure a gap between the electrostatic chuck 600 and the second guide part 634. The gap sensor 621 may be disposed on the first accommodating part 614a to correspond to the lower portion of the electrostatic chuck 600, and may be disposed on the side magnetic levitation bearing 618 to correspond to the side of the electrostatic chuck 600. Can be.
Next, the organic layer deposition assembly 100 of the organic layer deposition apparatus according to an embodiment of the present invention will be described. 6 is a perspective view schematically illustrating an organic layer deposition assembly of the organic layer deposition apparatus of FIG. 1, FIG. 7 is a schematic side cross-sectional view of the organic layer deposition assembly of FIG. 6, and FIG. 8 is a schematic plan view of the organic layer deposition assembly of FIG. 6. It is a cross section.
6 to 8, an organic layer deposition assembly 100 according to an embodiment of the present invention includes a deposition source 110, a deposition source nozzle unit 120, a blocking plate assembly 130, and a patterning slit sheet 150. ).
Here, although the chamber is not shown in FIGS. 6 to 8 for convenience of description, all the components of FIGS. 6 to 8 are preferably disposed in a chamber in which an appropriate degree of vacuum is maintained. This is to ensure the straightness of the deposition material.
In this chamber, the substrate 500, which is a deposition target, is transferred by the electrostatic chuck (see 600 in FIG. 1). The substrate 500 may be a substrate for a flat panel display device, and a large area substrate such as a mother glass capable of forming a plurality of flat panel display devices may be applied.
Here, in one embodiment of the present invention, the substrate 500 is moved relative to the organic layer deposition assembly 100, preferably to move the substrate 500 in the direction of the arrow A with respect to the organic layer deposition assembly 100. can do.
In detail, the conventional FMM deposition method required the mask size to be equal to or larger than the substrate size. Therefore, as the substrate size increases, the mask also needs to be enlarged. Therefore, there is a problem that it is not easy to manufacture such a large mask, and it is not easy to align the mask in a precise pattern by tensioning the mask.
In order to solve such a problem, the organic layer deposition assembly 100 according to an embodiment of the present invention is characterized in that the deposition is performed while the organic layer deposition assembly 100 and the substrate 500 move relative to each other. In other words, the substrate 500 disposed to face the organic layer deposition assembly 100 moves in the Y-axis direction and continuously performs deposition. That is, deposition is performed by scanning while the substrate 500 moves in the direction of arrow A in FIG. 6. Here, although the substrate 500 is shown to be deposited while moving in the Y-axis direction in the chamber (see 731 of FIG. 1), the spirit of the present invention is not limited thereto, the substrate 500 is fixed And it will be possible to perform the deposition while the organic layer deposition assembly 100 itself moves in the Y-axis direction.
Thus, in the organic layer deposition assembly 100 of the present invention, the patterned slit sheet 150 can be made much smaller than the conventional FMM. That is, in the case of the organic layer deposition assembly 100 of the present invention, since the substrate 500 moves in the Y-axis direction and performs deposition in a continuous manner, that is, by scanning, the X of the patterned slit sheet 150 If only the width in the axial direction and the width in the X-axis direction of the substrate 500 are substantially the same, the length in the Y-axis direction of the patterning slit sheet 150 may be formed to be much smaller than the length of the substrate 500. do. Of course, even if the width in the X-axis direction of the patterning slit sheet 150 is smaller than the width in the X-axis direction of the substrate 500, the scanning method by the relative movement of the substrate 500 and the organic layer deposition assembly 100 This makes it possible to deposit the entire substrate 500 sufficiently.
As such, in order for the deposition to be performed while the organic layer deposition assembly 100 and the substrate 500 move relative to each other, it is preferable that the organic layer deposition assembly 100 and the substrate 500 are spaced to some extent. This will be described later in detail.
Meanwhile, the deposition source 110 in which the deposition material 115 is received and heated is disposed on the side of the chamber that faces the substrate 500.
The deposition source 110 is provided with a crucible 112 filled with a deposition material 115 therein and a cooling block 111 surrounding the crucible 112. The cooling block 111 is to suppress the heat from the crucible 112 to the outside, that is, the inside of the chamber as much as possible. The cooling block 111 is provided with a heater (not shown) for heating the crucible 112. Included.
A blocking plate assembly 130 is provided at one side of the deposition source nozzle unit 120. The blocking plate assembly 130 includes a plurality of blocking plates 131 and a blocking plate frame 132 provided outside the blocking plates 131. The plurality of blocking plates 131 may be arranged parallel to each other along the X-axis direction. Here, the plurality of blocking plates 131 may be formed at equal intervals. In addition, each of the blocking plates 131 extends along the YZ plane when viewed in the drawing, and may be preferably provided in a rectangular shape. The plurality of blocking plates 131 arranged as described above divides the space between the deposition source nozzle unit 120 and the patterning slit sheet 150 into a plurality of deposition spaces S. That is, in the organic layer deposition assembly 100 according to the exemplary embodiment of the present invention, as shown in FIG. 5, the barrier layer 131 has a deposition space for each deposition source nozzle 121 to which a deposition material is sprayed. (S) is separated.
As described above, the blocking plate 131 divides the space between the deposition source nozzle unit 120 and the patterning slit sheet 150 into a plurality of deposition spaces S, thereby depositing the discharged from one deposition source nozzle 121. The material is not mixed with deposition materials discharged from other deposition source nozzles 121, but is deposited on the substrate 500 through the patterning slit 151. That is, the blocking plates 131 guide the movement path of the deposition material so that the deposition material discharged through the deposition source nozzles 121 is not dispersed but goes straight in the Y-axis direction.
As such, by providing the blocking plates 131 to secure the straightness of the deposition material, the size of the shadow formed on the substrate can be greatly reduced, and thus the organic layer deposition assembly 100 and the substrate 500 may be uniformly fixed. It becomes possible to space apart. This will be described later in detail.
The patterning slit sheet 150 is formed of a thin metal plate and is fixed to the frame 155 in a tensioned state. The patterning slit 151 is formed by etching the patterning slit sheet 150 in a stripe type. Here, the number of the patterning slits 151 may correspond to the number of deposition patterns to be formed on the substrate 500.
Meanwhile, the above-described blocking plate assembly 130 and the patterning slit sheet 150 may be formed to be spaced apart from each other to some extent, and the blocking plate assembly 130 and the patterning slit sheet 150 may be formed on a separate connection member 135. Can be connected to each other.
As described above, the organic layer deposition assembly 100 according to an embodiment of the present invention performs deposition while moving relative to the substrate 500. As such, the organic layer deposition assembly 100 is applied to the substrate 500. In order to move relatively, the patterned slit sheet 150 is formed to be spaced apart from the substrate 500 to some extent. In addition, in order to solve a shadow problem that occurs when the patterning slit sheet 150 and the substrate 500 are spaced apart, the blocking plate 131 between the deposition source nozzle unit 120 and the patterning slit sheet 150. By providing the straightness of the deposition material to provide a significant reduction in the size of the shadow (shadow) formed on the substrate.
In order to solve such a problem, in the organic layer deposition assembly 100 according to an embodiment of the present invention, the patterning slit sheet 150 is disposed to be spaced apart from the substrate 500 as the deposition target by a predetermined interval. This can be realized by providing the blocking plate 131 so that the shadow generated on the substrate 500 is reduced.
Using such an organic layer deposition apparatus, a thin film such as an organic layer of an organic light emitting display device may be formed, which will be described in detail with reference to FIG. 10.
The organic layer deposition assembly 800 according to the embodiment shown in FIG. 9 includes an evaporation source 810, an evaporation source nozzle unit 820, a first blocking plate assembly 830, Sheet 850 as shown in FIG. Here, the detailed configuration of the evaporation source 810, the first blocking plate assembly 830, and the patterning slit sheet 850 is the same as that of the embodiment according to the above-described FIG. 6, and thus a detailed description thereof will be omitted. In the present exemplary embodiment, the second blocking plate assembly 840 is provided at one side of the first blocking plate assembly 830, which is distinguished from the above-described embodiment.
In detail, the second blocking plate assembly 840 includes a plurality of second blocking plates 841 and a second blocking plate frame 842 disposed outside the second blocking plates 841. The plurality of second blocking plates 841 may be provided to be parallel to each other along the X-axis direction. The plurality of second blocking plates 841 may be formed at equal intervals. Further, each second blocking plate 841 is formed to be parallel to the YZ plane when viewed in the drawing, that is, perpendicular to the X-axis direction.
The plurality of first blocking plates 831 and the second blocking plates 841 disposed as described above serve to partition a space between the deposition source nozzle unit 820 and the patterning slit sheet 850. That is, by the first blocking plate 831 and the second blocking plate 841, the deposition space is separated for each deposition source nozzle 821 to which the deposition material is sprayed.
Here, each of the second blocking plates 841 may be disposed so as to correspond one-to-one with the respective first blocking plates 831. In other words, each of the second blocking plates 841 may be aligned with the respective first blocking plates 831 and disposed in parallel with each other. That is, the first blocking plate 831 and the second blocking plate 841 corresponding to each other are located on the same plane. Although the figure shows that the length of the first blocking plate 831 and the width of the second blocking plate 841 in the X-axis direction are the same, the spirit of the present invention is not limited thereto. That is, the second blocking plate 841, which requires precise alignment with the patterning slit 851, is relatively thin, while the first blocking plate 831, which does not require precise alignment, It is also possible to make it thick and easy to manufacture.
10 is a perspective view schematically illustrating an organic layer deposition assembly according to another embodiment of the present invention.
Referring to FIG. 10, the organic layer deposition assembly 900 according to another embodiment of the present invention includes a deposition source 910, a deposition source nozzle unit 920, and a patterning slit sheet 950.
Here, the deposition source 910 is a crucible 911 filled with the deposition material 915 therein, and the deposition material 915 filled with the inside of the crucible 911 by heating the crucible 911. A heater 912 for evaporating to the side of 920. Meanwhile, a deposition source nozzle unit 920 is disposed on one side of the deposition source 910, and a plurality of deposition source nozzles 921 are formed in the deposition source nozzle unit 920 along the Y-axis direction. Meanwhile, a patterning slit sheet 950 and a frame 955 are further provided between the deposition source 910 and the substrate 500, and the patterning slit sheet 950 includes a plurality of patterning slits 951 along the X-axis direction. Is formed. In addition, the deposition source 910, the deposition source nozzle unit 920, and the patterning slit sheet 950 are coupled by the connection member 935.
In the present embodiment, the arrangement of the plurality of deposition source nozzles 921 provided in the deposition source nozzle unit 920 is different from those of the above-described embodiments, which will be described in detail.
The deposition source nozzle unit 920 is disposed on one side of the deposition source 910, in detail, the side of the deposition source 910 facing the substrate 500. In addition, a plurality of deposition source nozzles 921 are formed in the deposition source nozzle unit 920 along the Y-axis direction, that is, the scanning direction of the substrate 500. Here, the plurality of evaporation source nozzles 921 may be formed at regular intervals. The deposition material 915 vaporized in the deposition source 910 passes through the deposition source nozzle unit 920 such that the deposition material 915 is directed toward the substrate 500 which is the deposition target. As described above, when the plurality of deposition source nozzles 921 are formed on the deposition source nozzle unit 920 along the Y-axis direction, that is, the scanning direction of the substrate 500, each patterning slit of the patterning slit sheet 950 ( The size of the pattern formed by the deposition material passing through the portions 951 is only affected by the size of one deposition source nozzle 921 (ie, there is only one deposition source nozzle 921 in the X-axis direction). Shadows will not occur. In addition, since a plurality of evaporation source nozzles 921 exist in the scanning direction, even if a flux difference occurs between the individual evaporation source nozzles, the difference is canceled, and the uniformity of deposition is maintained constant.
11 illustrates an organic layer deposition assembly according to another embodiment of the present invention. Referring to the drawings, the organic layer deposition assembly according to another embodiment of the present invention includes a deposition source 910, the deposition source nozzle unit 920 and the patterning slit sheet 950.
In this embodiment, the plurality of deposition source nozzles 921 formed in the deposition source nozzle unit 920 are distinguished from the above-described embodiment in that they are disposed at a predetermined angle. In detail, the deposition source nozzles 921 may be formed of two rows of deposition source nozzles 921a and 921b, and the two rows of deposition source nozzles 921a and 921b are alternately disposed. In this case, the deposition source nozzles 921a and 921b may be tilted to be inclined at a predetermined angle on the XZ plane.
That is, in this embodiment, the deposition source nozzles 921a and 921b are tilted and disposed at a predetermined angle. Here, the deposition source nozzles 921a of the first row are tilted to face the deposition source nozzles 921b of the second row, and the deposition source nozzles 921b of the second row are tilted to face the deposition source nozzles 921a of the first row. Can be. In other words, the deposition source nozzles 921a disposed in the left column face the right end of the patterning slit sheet 950, and the deposition source nozzles 921b disposed in the right column move the left end of the patterning slit sheet 950. It can be arranged to look at.
Referring to FIG. 12, the active mattress organic light emitting display device is formed on a substrate 500. The substrate 500 may be formed of a transparent material, for example, a glass material, a plastic material, or a metal material. An insulating film 31, such as a buffer layer, is formed on the substrate 500 as a whole.
On the insulating film 31, a TFT 40, a capacitor 50, and an organic light emitting element 60 as shown in FIG. 9 are formed.
On the other hand, the organic light emitting element 60 is to display predetermined image information by emitting red, green, and blue light in accordance with the flow of current, to form a first electrode 61 on the protective film 34 do. The first electrode 61 is electrically connected to the drain electrode 43 of the TFT 40.
The pixel defining layer 35 is formed to cover the first electrode 61. After the predetermined opening is formed in the pixel defining layer 35, the organic layer 63 including the light emitting layer is formed in the region defined by the opening. The second electrode 62 is formed on the organic layer 63.
The pixel defining layer 35 partitions each pixel and is formed of an organic material to planarize the surface of the substrate on which the first electrode 61 is formed, particularly the surface of the protective film 34.
The first electrode 61 and the second electrode 62 are insulated from each other, and light is emitted by applying voltages having different polarities to the organic layer 63 including the light emitting layer.
The organic layer 63 including the light emitting layer may be a low molecular weight or a high molecular organic material. When the low molecular weight organic material is used, a hole injection layer (HIL), a hole transport layer (HTL), and a light emitting layer (EML) may be used. An emission layer, an electron transport layer (ETL), and an electron injection layer (EIL) may be formed by stacking a single or a complex structure, and the usable organic material may be copper phthalocyanine (CuPc: copper). phthalocyanine), N, N-di (naphthalen-1-yl) -N, N'-diphenyl-benzidine (N, N'-Di (naphthalene-1-yl) -N, N'-diphenyl-benzidine: NPB And tris-8-hydroxyquinoline aluminum (Alq3).
Meanwhile, the first electrode 61 may function as an anode electrode, and the second electrode 62 may function as a cathode electrode. Of course, the first electrode 61 and the second electrode 62 may be used. ) May be reversed. The first electrode 61 may be patterned to correspond to the area of each pixel, and the second electrode 62 may be formed to cover all the pixels.
The first electrode 61 may be provided as a transparent electrode or a reflective electrode. When used as a transparent electrode, the first electrode 61 may be provided as ITO, IZO, ZnO, or In 2 O 3, and when used as a reflective electrode, Ag, Mg, After the reflective layer is formed of Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, a compound thereof, or the like, a transparent electrode layer may be formed thereon with ITO, IZO, ZnO, or In 2 O 3. The first electrode 61 is formed by a sputtering method or the like and then patterned by a photolithography method or the like.
Meanwhile, the second electrode 62 may also be provided as a transparent electrode or a reflective electrode. When the second electrode 62 is used as a transparent electrode, since the second electrode 62 is used as a cathode, a metal having a small work function, namely, Li, Ca, LiF / Ca, LiF / Al, Al, Ag, Mg, and compounds thereof are deposited to face the organic layer 63 including the light emitting layer, and thereafter, ITO, IZO, ZnO, or In2O3. The auxiliary electrode layer and the bus electrode line can be formed by, for example. When used as a reflective electrode, Li, Ca, LiF / Ca, LiF / Al, Al, Ag, Mg, and compounds thereof are formed by depositing the entire surface. At this time, vapor deposition can be performed by the method similar to the case of the organic layer 63 containing the light emitting layer mentioned above.
On the other hand, a protective layer 64 is further formed on the second electrode 62. The protective layer 64 is formed on the second electrode 62 to serve as a mask and to protect the second electrode 62 while removing the organic layer 63 in a region other than the pixel region. do. This will be described in detail later with reference to FIG. 10.
In addition to the above, the present invention can also be used for deposition of organic TFTs or inorganic films of organic TFTs, and can be applied to film forming processes of various other materials.
100: organic layer deposition assembly 110: deposition source
120: vapor deposition source nozzle portion 150: patterning slit sheet
500: substrate 600: electrostatic chuck
61: first electrode 62: second electrode
63: organic layer 64: protective layer
An electrostatic chuck to fix the substrate for deposition;
A deposition unit including a chamber maintained in a vacuum, and a thin film deposition assembly configured to deposit a thin film on a substrate disposed in the chamber and fixed to the electrostatic chuck; And
A first circulation part for moving the electrostatic chuck to which the substrate is fixed into the deposition part; Equipped with
The first circulation portion penetrates into the chamber when passing through the deposition portion,
And the first circulation part comprises a guide part including a receiving part for receiving the electrostatic chuck so that the electrostatic chuck can move in one direction.
A loading unit to fix the substrate to the electrostatic chuck; And
And an unloading part that separates the substrate from which the deposition is completed from the electrostatic chuck.
And the first circulation part sequentially moves to the loading part, the deposition part, and the unloading part.
The guide unit,
A driving unit generating a driving force to move the electrostatic chuck; And
And a magnetic levitation bearing that floats in the housing so that the electrostatic chuck can move in contact with the housing.
The driving unit is an organic layer deposition apparatus, characterized in that the linear motor.
The linear motor is an organic layer deposition apparatus comprising a magnetic rail disposed on one side of the electrostatic chuck and a coil disposed in the receiving portion.
The magnetic levitation bearing comprises a side magnetic levitation bearing disposed on the other side of the electrostatic chuck and an upper magnetic levitation bearing disposed on the electrostatic chuck, wherein the driving part is disposed on one side of the electrostatic chuck.
And a gap sensor for measuring a gap between the accommodation portion and the electrostatic chuck.
The accommodation unit has an organic layer deposition apparatus, characterized in that it has a receiving groove that can accommodate both sides of the electrostatic chuck.
Organic layer deposition apparatus characterized in that a plurality of thin film deposition assemblies are provided in the chamber
The chamber includes an first chamber and a second chamber, each of which is provided with a plurality of thin film deposition assemblies, wherein the first chamber and the second chamber is connected to each other.
And a patterning slit sheet disposed to face the deposition source nozzle unit and having a plurality of patterning slits formed along a second direction perpendicular to the first direction.
And the substrate is formed to be spaced apart from the organic layer deposition apparatus by a predetermined degree so as to be relatively movable with respect to the organic layer deposition apparatus.
A patterning slit sheet disposed to face the deposition source nozzle unit and having a plurality of patterning slits formed along the first direction; And
And the patterning slit sheet is fixedly coupled to the inside of the chamber.
And the patterning slit sheet is formed smaller than the substrate.
And the width of the patterned slit sheet in the second direction is substantially equal to the width of the substrate in the second direction.
And the deposition source, the deposition source nozzle unit, and the patterning slit sheet are integrally formed by a coupling member.
And the connection member guides a movement path of the deposition material.
The plurality of deposition source nozzles may include two rows of deposition source nozzles formed along the first direction, and the two rows of deposition source nozzles may be tilted in a direction facing each other. Organic layer deposition apparatus.
And deposition source nozzles disposed on a second side of the two rows of deposition source nozzles so as to face an end of the first side of the patterned slit sheet.
And each of the plurality of blocking plates is formed to extend in a second direction substantially perpendicular to the first direction.
And the plurality of blocking plates are arranged at equal intervals.
And the blocking plate assembly comprises a first blocking plate assembly having a plurality of first blocking plates and a second blocking plate assembly having a plurality of second blocking plates.
Each of the plurality of first blocking plates and the plurality of second blocking plates is formed in a second direction substantially perpendicular to the first direction, thereby providing a plurality of spaces between the deposition source nozzle part and the patterning slit sheet. Organic layer deposition apparatus characterized in that divided into two deposition spaces.
And the plurality of first blocking plates and the plurality of second blocking plates are disposed to correspond to each other.
And the first blocking plate and the second blocking plate corresponding to each other are disposed on substantially the same plane.
And the deposition source and the blocking plate assembly are spaced apart from each other.
Securing the substrate with an electrostatic chuck;
Transferring the electrostatic chuck to which the substrate is fixed into the chamber maintained in vacuum by using a first circulation unit installed to penetrate the chamber; And
Using a thin film deposition assembly disposed in the chamber, and depositing an organic film on the substrate by relative movement of the substrate and the thin film deposition assembly,
And the electrostatic chuck is transported in the chamber in a non-contact manner with the first circulation part.
After the organic film deposition step,
And returning the electrostatic chuck separated from the substrate to the step of fixing the substrate to the electrostatic chuck by using a second circulation unit installed outside the chamber.
And the substrate is formed to be spaced apart from the organic layer deposition apparatus by a predetermined degree so as to be movable relative to the organic layer deposition apparatus.
The first circulation unit may include a guide unit including a receiving unit accommodating the electrostatic chuck to move the electrostatic chuck, a linear motor generating a driving force to move the electrostatic chuck, and the electrostatic chuck to the And a magnetic levitation bearing floating in the housing to move in contact with the housing.
KR1020110066124A 2011-07-04 2011-07-04 Apparatus for thin layer deposition and method for manufacturing of organic light emitting display apparatus using the same KR20130004830A (en)
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KR20130004830A true KR20130004830A (en) 2013-01-14
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KR (1) KR20130004830A (en)
CN (2) CN202786403U (en)
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2012-06-29 TW TW101123589A patent/TWI570978B/en active
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