Patent Abstract:
A deposition apparatus includes a deposition chamber, a plurality of substrate holders comprising a first holder configured to maintain a substrate at a first substrate position in the deposition chamber and a second holder configured to maintain another substrate at a second substrate position in the deposition chamber, a deposition source disposed in the deposition chamber and configured to supply a deposition material to apply onto substrates placed at the first and second substrate positions, and a deposition source transfer mechanism configured to move the deposition source to be opposite to one of the first and second substrates in a first direction, a substrate transfer mechanism configured to transfer a substrate in a second direction to or from the first substrate position and further configured to transfer another substrate in the second direction to or from the second substrate position.

Full Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims priority to and the benefit of Korean Patent Application No. 10-2013-0046775 filed in the Korean Intellectual Property Office on Apr. 26, 2013, the entire contents of which are incorporated herein by reference. 
       BACKGROUND 
       [0002]    (a) Field 
         [0003]    The present disclosure relates to a deposition apparatus, a deposition system comprising the deposition apparatus and a method of manufacturing an organic light emitting diode display. 
         [0004]    (b) Discussion of the Related Technology 
         [0005]    An organic light emitting diode (OLED) display is a flat panel display which can be made lightweight and thin because it has a self-luminous characteristic and requires no separate light source. Particularly, the OLED display exhibits quality characteristics such as low power consumption, high luminance, high response speed, and as such, the OLED display receives much attention as a next-generation display device. 
         [0006]    In general, an OLED display includes an organic light emitting element including an anode, an organic emission layer, and a cathode. Holes and electrons are injected from the anode and the cathode, respectively, to form excitons, and the excitons make a transition to a ground state, thereby causing the organic light emitting diode to emit light. 
         [0007]    The anode and the cathode may be formed of a metal thin film or a transparent conductive thin film and the organic emission layer may be formed of at least one organic thin film. A vacuum deposition method may be used to form such an organic thin film, a metal thin film, and the like, on a substrate of the organic light emitting diode display. Generally, the vacuum deposition method is used for forming an organic thin film, a metal thin film, and the like. In a deposition device including a deposition source, a deposition material is inserted into a crucible and heated for deposition of the deposition material on the substrate such that a thin film is formed. 
         [0008]    The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art. 
       SUMMARY 
       [0009]    One aspect of the present invention provides a deposition apparatus that can process a plurality of substrates generally in parallel and minimize process standby time such as alignment of substrates and deposition masks and alignment time to achieve high productivity, and a deposition system including the same. 
         [0010]    In addition, another aspect of the present invention provides a manufacturing method of an organic light emitting diode display using a deposition chamber and a deposition system. 
         [0011]    A deposition apparatus according to an exemplary embodiment includes: a deposition chamber; a plurality of substrate holders comprising a first holder configured to maintain a substrate at a first substrate position in the deposition chamber and a second holder configured to maintain another substrate at a second substrate position in the deposition chamber, a deposition source disposed in the deposition chamber and configured to supply a deposition material to apply onto substrates placed at the first and second substrate positions, and a deposition source transfer mechanism configured to move the deposition source to be opposite to one of the first and second substrates in a first direction, a substrate transfer mechanism configured to transfer a substrate in a second direction to or from the first substrate position and further configured to transfer another substrate in the second direction to or from the second substrate position. 
         [0012]    The deposition chamber may further include a mask transfer mechanism configured to transfer at least one deposition mask to a first mask position disposed between the first substrate position and the first source position and a second mask position disposed between the second substrate position and the second source position. 
         [0013]    The deposition chamber may further include a mask storing chamber attached to the deposition chamber and configured to store at least a deposition mask, and the mask storing chamber is connected with the mask transfer mechanism. 
         [0014]    The mask transfer mechanism may be provided in one side end of the deposition chamber along the first direction and is configured to move a mask along the first direction between the mask storing chamber and the deposition chamber. 
         [0015]    The deposition chamber may further include a mask cleansing chamber connected with the mask storing chamber and the deposition chamber and cleansing the deposition mask. 
         [0016]    The mask cleansing chamber may be provided between the deposition chamber and the mask storing chamber. 
         [0017]    The deposition chamber may further include an alignment device configured to align the respective substrates and the deposition masks. 
         [0018]    The mask transfer mechanism may include a pair of rails extending in the first direction, the deposition mask comprises a mask main body that a shielding portion and an opening are formed and a frame supported by the rails by fixing the mask main body, and the frame of the deposition mask may further include a protection plate surrounding the rails. 
         [0019]    A deposition system according to an exemplary embodiment includes a plurality of the deposition apparatus each of which comprises the deposition chamber, and a plurality of transfer chambers provided between and connect two immediately neighboring deposition chambers. 
         [0020]    The deposition system may a mask transfer mechanism configured to transfer at least one mask to a first mask position disposed between the first substrate position and the first source position and to a second mask position disposed between the second substrate position and the second source position. 
         [0021]    The deposition system may be configured to coordinate the substrate transfer mechanism and the mask transfer mechanism such that when a substrate is provided into the deposition chamber from the transfer chamber, the substrate is transferred along the second direction, and a deposition mask is transferred along the first direction that crosses the second direction. 
         [0022]    The transfer chamber may accommodate the substrate transfer mechanism. 
         [0023]    The deposition chamber may further include a buffer chamber connected to the transfer chamber. In this case, the substrate transfer portion may include a robot arm structure. 
         [0024]    A manufacturing method of an organic light emitting diode display according to an exemplary embodiment includes: providing the deposition apparatus, transferring a first substrate and a second substrate independently into the deposition chamber to place the first substrate at the first substrate position and the second substrate at the second substrate position, providing a first deposition mask and a second deposition mask into the deposition chamber, aligning the first substrate and the first deposition mask at a first alignment location, transferring the deposition source to the first alignment location, applying a deposition material to the first substrate, aligning the second substrate and the second deposition mask at a second alignment location, transferring the deposition source to the second alignment location; and applying the deposition material to the second substrate. 
         [0025]    The alignment to the second alignment location may be performed while the deposition material is applied to the first substrate. 
         [0026]    The manufacturing method of the organic light emitting diode display may further include, after the spraying of the deposition material to the first substrate, discharging the first substrate from the deposition chamber. 
         [0027]    A manufacturing method of an organic light emitting diode display according to another exemplary embodiment includes: providing the deposition apparatus, transferring a first substrate and a second substrate independently into the deposition chamber to place the first substrate at the first substrate position and the second substrate at the second substrate position, providing a first deposition mask and a second deposition mask into the deposition chamber, aligning the first substrate and the first deposition mask at a first alignment location, transferring the deposition source to the first alignment location, applying a deposition material to the first substrate, aligning the second substrate and the second deposition mask at a second alignment location, transferring the deposition source to the second alignment location; and applying the deposition material to the second substrate. While the deposition material is applied to the first substrate, the second substrate and the second mask are transferred to be aligned at the second alignment location. After the deposition material is applied to the first substrate, the first substrate is discharged from the deposition chamber. 
         [0028]    The plurality of the deposition apparatuses may comprise first and second deposition apparatus, wherein the deposition materials used in the first and second deposition apparatuses are substantially different from each other. 
         [0029]    The plurality of the deposition apparatuses may comprise first and second deposition apparatus, wherein the deposition mask used in the first deposition apparatus and the deposition mask used in the second deposition apparatus are substantially different from each other. 
         [0030]    According to the exemplary embodiments of the present invention, a thin film process can be sequentially performed in a plurality of process lines provided in each of a plurality of deposition chambers through a single deposition source provided in each of the deposition chamber so that cost can be saved and productivity can be improved. 
         [0031]    Further, standby time can be shortened by performing substrate transferring and substrate and mask alignment with respect to a substrate in a process line while a thin film deposition process is performed on a substrate in another process line, thereby further improving productivity. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0032]      FIG. 1  is a top plan view of a deposition system according to a first exemplary embodiment. 
           [0033]      FIG. 2  is a schematic side view of a deposition chamber of the deposition system according to the first exemplary embodiment. 
           [0034]      FIG. 3  is a partially enlarged view of the deposition chamber of the deposition system according to the first exemplary embodiment. 
           [0035]      FIG. 4  is a partial enlarged view of the deposition system according to the first exemplary embodiment. 
           [0036]      FIG. 5  and  FIG. 6  are top plan views of a substrate transfer portion of the deposition system according to the first exemplary embodiment. 
           [0037]      FIG. 7  is a top plan view of a deposition system according to a second exemplary embodiment. 
           [0038]      FIG. 8  is a schematic side view of a deposition chamber of a deposition system according to a third exemplary embodiment. 
           [0039]      FIG. 9A  to  FIG. 9C  are schematic diagrams of a manufacturing method of an organic light emitting diode (OLED) display according to an exemplary embodiment. 
       
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
       [0040]    Hereinafter, a deposition chamber, a deposition system including the deposition chamber, and a manufacturing method of an organic light emitting diode display will be described in further detail with reference to the accompanying drawings. However, the present invention is not limited to the exemplary embodiments disclosed hereinafter but has many variations, and the exemplary embodiments described hereinafter are provided to make the disclosure of the present invention complete and to completely inform a person of ordinary skill in the art the scope of the present invention. In the drawings, like reference numerals refer to like elements. 
         [0041]    In addition, unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising”, will be understood to imply the inclusion of stated elements but not the exclusion of any other elements. Further, the word “on” means positioning on or below the object portion, but does not essentially mean positioning on the upper side of the object portion based on a gravity direction. 
         [0042]    In order to form an organic thin film, a metal thin film, and the like using the vacuum deposition method, a deposition system such as a cluster-type deposition system, an inline deposition system, and the like may be used. The inline deposition system is a deposition system in which a substrate loading chamber, a substrate unloading chamber, and a plurality of deposition chambers disposed between the substrate loading chamber and the substrate unloading chamber are arranged in a row, and has a merit of shortening a process time compared to the cluster-type deposition system. 
         [0043]      FIG. 1  is a top plan view of a deposition system according to a first exemplary embodiment,  FIG. 2  is a schematic side view of a deposition chamber according to the first exemplary embodiment, and  FIG. 3  is a partial exploded perspective view of the deposition chamber according to the first exemplary embodiment. 
         [0044]    Referring to  FIG. 1 , a deposition system according to the first exemplary embodiment includes a plurality of deposition chambers  100  and a plurality of transfer chambers  300 . 
         [0045]    The deposition chamber  100  is a means for forming a thin film of a substrate  122 , and is provided in plural corresponding to the number of thin films formed on the substrate  122 . 
         [0046]    For example, when a display device formed on the substrate  122  is an organic light emitting diode (OLED) display, an emission layer ELM is formed, and a hole injection layer (HIL), a hole transport layer (HTL), an electron transporting layer ETL, and an electron injection layer may be further formed. In addition, a metal thin film functioning as a cathode or an anode or a transparent conductive thin film may be further formed on the substrate  122 . The thin films are formed in different deposition chambers  100 , and therefore the number of the deposition chambers  100  according the present exemplary embodiment corresponds to the number of an organic thin film, a metal thin film, and the like. 
         [0047]    Referring to  FIG. 2 , each of the deposition chambers  100  includes a chamber main body  110 , a substrate fixing portion  120 , a deposition source  130 , a deposition source transfer portion  140 , and a mask transfer portion  150 . 
         [0048]    The chamber main body  110  defines an inner space formed therein, and performs a process for forming a thin film on the substrate  122  in the space. A vacuum pump (not shown) that decreases an internal pressure by discharging gas from the space and a venting means (not shown) that increases the internal pressure in the chamber main body by injecting a constant gas to the inner space of the chamber main body may further be provided. 
         [0049]    The substrate  122  ( 122   a ,  122   b ) is transferred into the inner space of the chamber main body  110  and fixed to be opposite to a spray nozzle of the deposition source  130  by the substrate fixing portion  120  ( 120   a  and  120   b ). A process and structure for carrying the substrate  122  into the inner space of the chamber main body  110  and discharging the substrate  122  from the chamber main body  100  will be described later. 
         [0050]    The substrate fixing portion or substrate holder  120  has a structure for easily attaching and detaching the substrate  112  so as to stably fix the substrate  122  while a thin film of a deposition material is formed and then discharge the substrate  122  from the inner space of the chamber main body  110  after termination of the treatment. 
         [0051]    The substrate fixing portions  120   a  and  120   b  are provided in plural to treat a plurality of substrates in the deposition chamber  100  during one deposition process. The plurality of substrate fixing portions  120   a  and  120   b  respectively fix or hold the plurality of substrates  122   a  and  122   b  and can maintain the substrates at their deposition stations. In embodiments, the substrate holders  120   a  and  120   b  may be fixed in the deposition stations. In alternative embodiments, the substrate holders  120   a  and  120   b  may be movable to transfer substrates to the deposition stations and stop at the deposition stations to maintain the transferred substrates at the deposition stations. 
         [0052]    In the present exemplary embodiment, the substrate fixing portion  120  is exemplarily formed of two fixing portions, i.e., the first substrate fixing portion  120   a  and the second substrate fixing portion  120   b , but it is not restrictive. The first substrate fixing portion  120   a  and the second substrate fixing portion  120   b  fix the first substrate  122   a  and the second substrate  122   b , respectively corresponding thereto. And the first substrate fixing portion  120   a  and the second substrate fixing portion  120   b  may be disposed generally in parallel with each other and arranged along a first direction (i.e., x-axis direction) for the respective substrates  122   a  and  122   b  to be opposite to the deposition source  130 . 
         [0053]    In addition, during a deposition process with respect to the substrates  122   a  and  122   b , the first substrate fixing portion  120   a  and the second substrate fixing portion  120   b  may be disposed at a distance from each other, interposing a gap therebetween along the first direction so as to prevent the deposition material from being attached to the second substrate that is waiting for deposition while depositing the first substrate. 
         [0054]    Referring to  FIG. 3 , as a means for discharging a deposition material for deposition to the substrate  122 , the deposition source  130  is provided with a space (not shown) for containing a deposition material such as an organic material, and spray nozzles  134  spraying the deposition material are formed in one side of the deposition source  130 , disposed opposite to the substrate  120 . 
         [0055]    The deposition material containing space may be formed of a ceramic material having an excellent heat emission feature, such as alumina (Al2O3), aluminum nitride (AlN), and the like, and it is not restrictive. The deposition material receiving space may be formed of various materials having excellent heat emission feature and heat resistance. 
         [0056]    Heater (not shown) may be formed to surround the external surface of the deposition material containing space in a closely attached manner, and the heater heats the received deposition material for vaporization of the deposition material. 
         [0057]    As shown in  FIG. 3 , the deposition source  130  may be provided as a linear deposition source extended in a second direction (i.e., y-axis direction) that crosses the first direction. In embodiments, the x-axis direction and the y-axis direction are generally perpendicular to each other. In this case, the linear deposition source may be extended corresponding to the length of the substrate opposite thereto. 
         [0058]    An angle control member  136  that controls or limits a spray angle of the deposition material may be formed at the periphery area of the spray nozzles  134 . As shown in  FIG. 3 , the angle control member  136  is extended along a length direction of the linear deposition source  130  to make the organic material uniformly sprayed on the substrate  30  by controlling a deposition angle of the deposition material sprayed from the spray nozzles  134 , and prevents the deposition material from being attached to other substrate that does not experience a deposition process during the deposition process. 
         [0059]    As a means for transferring the deposition source  130 , the deposition source transfer portion or deposition source transfer mechanism  140  moves the deposition source  130  to be opposite to one of the substrates  122   a  and  122   b . The deposition source transfer portion  140  enables a single deposition source  130  to be sequentially deposited to the plurality of substrates  122   a  and  122   b.    
         [0060]    When the deposition process is performed to the first substrate  122   a , the deposition source  130  is disposed at a location that is opposite to the first substrate  122   a  through the deposition source transfer portion  140 . When the deposition process for the first substrate  122   a  is finished, the deposition source  130  is disposed at a location that is opposite to the second substrate  122   b  through the deposition source transfer portion  140  for performance of the deposition process. 
         [0061]    A plurality of deposition masks  160  includes two deposition masks  160   a  and  160   b , and is provided as a means for forming patterns of an organic thin film on the substrate  122 . In a deposition mask, openings are formed between shielding portions that block deposition of the organic material such that the organic material is deposited on the substrate  122  through the openings. 
         [0062]    The deposition mask  160  is disposed under one surface of the substrate  122 , to which the pattern of the organic thin film is to be formed. In the present exemplary embodiment, the deposition process is performed with respect to two substrates  122  in one chamber, and therefore two deposition masks  160   a  and  10   b  are used. 
         [0063]    The two deposition masks  160   a  and  160   b  are transferred and placed to correspond to the substrates  122   a  and  122   b  by the mask transfer portion or mask transfer mechanism  150 . As a means for arranging the deposition masks  160   a  and  160   b  at mask locations respectively corresponding to the substrates  122   a  and  122   b , the mask transfer portion  150  may transfer the deposition masks  160   a  and  160   b  generally in parallel with the first direction (x-axis direction). 
         [0064]    The mask transfer portion  150  includes a pair of rails  152  extending in the first direction (x-axis direction) as shown in  FIG. 3  separated from a distance with a predetermined gap along the second direction (y-axis direction) and a plurality of rollers  154  arranged along a length direction of the pair of rails  152  and contacting the deposition mask. 
         [0065]    When the deposition mask  160  is being transferred, friction between the deposition mask  160  and the rail  152  is reduced by the rollers  154  so that the deposition mask  160  can be smoothly transferred. 
         [0066]    In this case, the deposition mask  160  is disposed between the pair of rails  152 . And the deposition mask  160  includes a mask main body  162  where the shielding portion and the openings are formed and a frame  164  fixing the mask main body  162  and supported by the rails  152 . 
         [0067]    The deposition mask  160  may further include a protection plate  166  extending from one side of the frame  164  to prevent the deposition material from being attached to the rails  152 . That is, the protection plate  166  is extended from a side opposite to the spray nozzles  134  to cover the rail  152 . 
         [0068]    In the present exemplary embodiment, the mask transfer portion  150  is illustrated as a rail, but it is not restrictive. The mask transfer portion  160  may have various shapes as long as the deposition mask  160  is transferred to one direction and arranged at a predetermined location. In addition, the deposition mask  160  may have various shapes as long as it is being supported by the mask transfer portion  150  and transferred along the mask transfer portion  150 . 
         [0069]    Referring back to  FIG. 2 , a mask storing chamber or mask storage  200  may further be included to store the deposition mask  160  at one side of the chamber main body  110 . The mask storing chamber  200  stores a required deposition mask  160  according to the type of an organic thin film, a metal thin, film, and the like formed in each deposition chamber  100 , and discharges the deposition mask  160  toward the inner space of the chamber main body  110  during the deposition process. 
         [0070]    The mask storing chamber  200  is connected with the mask transfer portion  150  to mount the deposition mask  160  discharged from the mask storing chamber  200  to the mask transfer portion  150 . 
         [0071]    In this case, the deposition mask  160  may be mounted to the mask transfer portion  150  using a mask transfer holder (not shown). 
         [0072]    In order to arrange the substrates  122   a  and  122   b  and the deposition masks  160   a  and  160   b  at predetermined locations, respectively, a first alignment portion  170   a  and a second alignment portion  170   b  may be formed at one side of the chamber main body  110 . The first alignment portion  170   a  aligns the first substrate  122   a  and the first deposition mask  160   a , and the second alignment portion  170   b  aligns the second substrate  122   b  and the second deposition mask  160   b.    
         [0073]      FIG. 4  is a partially exploded side view of the deposition chamber according to the first exemplary embodiment. 
         [0074]    The mask storing chamber  200  is connected with the mask transfer portion  150  to make the deposition mask  160  transferred from the inner space of the chamber main body  110  into the mask storing chamber  200  through the mask transfer portion  150  after the deposition process is finished. In addition, the deposition mask  160  stored in the mask storing chamber  200  is carried into the deposition mask  160  again for a deposition process. 
         [0075]    As shown in  FIG. 1 , the deposition system according to the exemplary embodiment includes a plurality of deposition chambers  100  and a plurality of transfer chambers  300  disposed between the deposition chambers  100  to connect neighboring deposition chambers  100 . 
         [0076]    In embodiments, the substrates  122  are provided by being transferred along a direction (for example, y-axis direction) to which the deposition chambers  100  and the transfer chambers  300  are connected, and the deposition mask  160  may be provided along another direction (for example, x-axis direction) that crosses the transfer direction of the substrate  122 . 
         [0077]    As shown in  FIG. 1 , when the deposition chamber  100  and the transfer chamber  300  are arranged in a row along the second direction (y-axis direction), the substrate  122  may be transferred along the alignment direction of the chambers. When the two substrates  122   a  and  122   b  are processed in a single deposition chamber  100 , the two substrates  122   a  and  122   b  may be provided generally in parallel with the chamber alignment direction (refer to AL and BL of  FIG. 1 ). 
         [0078]      FIG. 5  and  FIG. 6  are top plan views illustrating exemplary variations of the substrate transfer portion according to the first exemplary embodiment. 
         [0079]    The transfer chamber  300  includes a substrate transfer portion or substrate transfer mechanism  310   a  that discharges the substrate  122  from an adjacent deposition chamber and carries the discharged substrate  122  into another deposition chamber. As shown in  FIG. 5 , the substrate transfer portion  310   a  may be formed in the shape of a robot arm. The robot arm is inserted in a deposition chamber  1001  where the deposition process is finished and grips the substrate  122 , and then mounts the gripped substrate  122  in a substrate fixing portion  120  in another adjacent deposition chamber  1002  where the next deposition process is going to be performed. 
         [0080]    In addition, as shown in  FIG. 6 , the substrate transfer portion  310  may be formed using a sliding method. And the substrate transfer portion  310  includes a substrate tray  312  on which the substrate  122  is mounted or placed and a sliding guide  314  along which the substrate tray  312  is slid. After the substrate tray  312  is inserted in the deposition chamber  1001  where the deposition process is finished and then the substrate  122  is mounted on the substrate tray  312 , the substrate  122  is mounted to a substrate fixing portion  120  in another adjacent deposition chamber  1002  where the next deposition process is going to be performed. 
         [0081]    In addition, the deposition system according to the exemplary embodiment may further include a loading chamber  400  and a substrate unloading chamber  500 . The substrate  122  is loaded into the deposition system through the substrate loading chamber  400 , and a deposition material is deposited in each of the deposition chamber  100  to form an organic thin film on the substrate  122 , and then the substrate  122  is unloaded through the substrate unloading chamber  500 . 
         [0082]    A gate valve may be provided between the substrate loading chamber  400  and the deposition chamber  100 , and another gate valve may be provided between the deposition chamber  100  and the substrate unloading chamber  500 . Each gate valves is provided between one of the deposition chambers  100  and the immediately neighboring transfer chamber  200 . Such a gate valve is opened while the substrate  122  is being transferred and closed while the organic material deposition process is performed such that the organic material deposition process can be performed in a vacuum state. 
         [0083]      FIG. 7  is a top plan view of a deposition system according to a second exemplary embodiment. 
         [0084]    Referring to  FIG. 7 , a deposition system according to the present exemplary embodiment further includes a buffer chamber  320  connected with a transfer chamber  300  at one side of the transfer chamber  300 . When the substrate  122  is damaged or a problem occurs in a deposition chamber  100  or a transfer chamber  300 , the substrate  122  may be transferred into the buffer chamber  320  and then stored. 
         [0085]    The buffer chamber  320  is provided in connection with the transfer chamber  300  at a location that is spaced apart from a transfer path of the substrate  122  in order not to interrupt transferring of the substrate  122 . When the substrate transfer portion  310  of the transfer chamber  300  is provided in the shape of a robot arm, the buffer chamber  320  is provided adjacent to the substrate transfer portion  310  formed in the shape of the robot arm to temporarily store the substrate, and accordingly, a time loss that may occur during mass production can be reduced. 
         [0086]    In the deposition system according to the present exemplary embodiment, other configuration than the buffer chamber  320  may be the same as that of the first exemplary embodiment. 
         [0087]      FIG. 8  is a schematic side view of a deposition chamber of a deposition system according to a third exemplary embodiment. 
         [0088]    Referring to  FIG. 8 , in a deposition system according to the present exemplary embodiment, a mask cleansing chamber  210  connected with a mask storing chamber  200  and the inside of a chamber main body  110  and cleaning a deposition mask  160  is formed in a lower end portion of the mask storing chamber  200 . 
         [0089]    The mask cleaning chamber  210  is a device for cleaning a deposition material attached to a deposition mask after the deposition mask  160  repeats the deposition process several times, and may clean the deposition mask  160  using plasma or ultraviolet (UV) ray. 
         [0090]    Gate values are respectively provided between the mask storing chamber  200  and the chamber main body  110 , between the mask cleaning chamber  210  and the chamber main body  110 , and between the mask storing chamber  200  and the mask cleaning chamber  210 , and the gate valves are opened when the deposition mask  160  is transferred along the mask transfer portion  150  and the gate valves are closed when the transferring of the deposition mask  160  is finished. 
         [0091]    The mask cleaning chamber  210  is connected with the mask transfer portion  150  and thus the deposition mask  160  transferred from the inner space of the chamber main body  110  after the deposition process can be carried into the mask cleansing chamber  210  through the mask transfer portion  150 . In addition, the deposition mask  160  cleaned in the mask cleaning chamber  210  is carried back into the inner space of the chamber main body  110  for the next deposition process. 
         [0092]    The mask transfer portion  150  may be moved so as to be connected with the mask storing chamber  200  or the mask cleaning chamber  210 . For example, in  FIG. 8 , the mask transfer portion  150  is illustrated to be connected with the mask cleaning chamber  210 , but the mask transfer portion  150  may be connected with the mask storing chamber  200  by being transferred upward. 
         [0093]    In the deposition system according to the present exemplary embodiment, a structure, excluding the structure related to the mask cleansing chamber  210  is the same as that of the first exemplary embodiment, and a buffer chamber may be provided as in the second exemplary embodiment. 
         [0094]    Hereinafter, the operation and the manufacturing method will be described by illustrating the deposition system according to the first exemplary embodiment, but a deposition system according to the second or third exemplary embodiment or a deposition system according to the exemplary variations may also be applicable. 
         [0095]      FIG. 9A  to  FIG. 9C  are schematic diagrams sequentially illustrating a manufacturing method of an OLED display according to an exemplary embodiment. 
         [0096]    Referring to the drawing, the manufacturing method of the OLED display according to the exemplary embodiment includes providing a deposition source, placing a mask, aligning a first substrate, transferring the deposition source, depositing the first substrate, aligning a second substrate, transferring the deposition source, and depositing the second substrate. 
         [0097]    First, as shown in  FIG. 9A , the deposition source  130  spraying the deposition material is provided in the deposition chamber  100 . The first substrate  122   a  is inserted into the deposition chamber  100 . The second substrate  122   b  is inserted into the deposition chamber  100  independently from the transfer of the first substrate  122   a . In embodiments, the second substrate  122   b  can be inserted into the deposition chamber  100  while depositing the first substrate  122   a.    
         [0098]    The first substrate  122   a  and the second substrate  122   b  are inserted generally in parallel along the second direction (y-axis direction) where the deposition chamber  100  and the transfer chamber  300  are arranged (refer to AL and BL of  FIG. 1 ). The first substrate  122   a  and the second substrate  122   b  can be arranged generally in parallel with each other, interposing a gap therebetween along the first direction that crosses the transfer direction of the first substrate  122   a  and the second substrate  122   b.    
         [0099]    The first deposition mask  160   a  and the second deposition mask  160   b  are transferred into the deposition chamber  100 . The deposition masks  160   a  and  160   b  received in the mask storing chamber  200  are discharged and mounted on the mask transfer portion  150 , and then the deposition masks  160   a  and  160   b  are transferred to predetermined locations. 
         [0100]    That is, the first deposition mask  160   a  is transferred to a location corresponding to the first substrate  122   a , and the second deposition mask  160   b  is transferred to a location corresponding to the second substrate  122   b . The first substrate  122   a  and the first deposition mask  160   a  are aligned in a predetermined first alignment location through a first alignment portion  170   a . In embodiments, the first deposition mask  160   a  and the second deposition mask  160   b  are transferred into the deposition chamber  100  before the first and second substrates are transferred into the chamber  100 , respectively. Alternatively, the first deposition mask  160   a  and the second deposition mask  160   b  are transferred into the deposition chamber  100  after the first and second substrates are transferred into the chamber  100 , respectively. 
         [0101]    The deposition source  130  is transferred to the first alignment location, and then as shown in  FIG. 9B , the deposition material received in the receiving space of the deposition source  130  is heated to be vaporized and then sprayed toward the first substrate  122   a.    
         [0102]    The second substrate  122   b  and the second deposition mask  160   b  are aligned in a predetermined second alignment location through the second alignment portion  170   b . The aligning of the second substrate  122   b  and the second deposition mask  160   b  in the second alignment location may be performed while the deposition material is sprayed to the first substrate  122   a . Since the second substrate  122   b  is aligned while the deposition material is sprayed to the first substrate  122   a , a process time can be shortened. 
         [0103]    When the deposition process with respect to the first substrate  122   a  is finished, as shown in  FIG. 9 , the deposition source  130  is transferred to the second alignment location and then the deposition material is sprayed toward the second substrate  122   b.    
         [0104]    After the deposition process with respect to the first substrate  122   a  is finished and before a deposition process with respect to the second substrate  122   b  starts, the first substrate  122   b  may be discharged to the outside of the deposition chamber  100 . During the deposition process with respect to the second substrate  122   b , the first substrate  122   a  may be prepared for the next deposition process by being transferred to the next deposition chamber through the transfer chamber  300 . Accordingly, a process time can be shortened. 
         [0105]    After the deposition process with respect to the second substrate  122   b  is finished, the second substrate  122   b  may also be prepared for the next process by being transferred to the next deposition chamber. Through performing deposition steps of the above-stated deposition process in each deposition chamber, a multi-layered organic thin film may be formed in the substrates  122   a  and  122   b.    
         [0106]    While this invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Technology Classification (CPC): 2