Patent Publication Number: US-2023133714-A1

Title: Apparatus for treating substrate and method for treating substrate

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     A claim for priority under 35 U.S.C. § 119 is made to Korean Patent Application No. 10-2021-0147841 filed on Nov. 1, 2021, in the Korean Intellectual Property Office, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND 
     Embodiments of the inventive concept described herein relate to a substrate treating apparatus and a substrate treating method. 
     In general, a semiconductor element is manufactured by repeatedly performing a series of processing processes on a silicon wafer used as a substrate. For example, a deposition process for forming a thin film on the substrate, a photolithography process for forming a photoresist pattern on the thin film, and an etching process for patterning or removing the thin film may be performed. 
     Recently, the semiconductor element is pursuing a high integration, and for a high integration of semiconductor elements, it is required to form a pattern having a high aspect ratio (HAR). In order to form the pattern having the high aspect ratio, a method of forming the pattern by combining a deposition process and an etching process is known. In the case of a pattern formation process by combining the deposition process and the etching process, a process temperature of each process is different from each other, and accordingly, there is a device problem of a process for performing the deposition process and the etching process. 
     In an embodiment, in the case of a deposition-etching composite process using a same substrate support unit in one chamber, a temperature of the chamber or substrate support unit must be converted to a process temperature of a process every time each process is performed. At this time, there is a problem that parts inside the chamber are damaged by a heat shock due to a temperature conversion, and the usage life of the parts in the chamber or the chamber is reduced accordingly. In addition, if the temperature is converted, there is a problem that contaminants such as particles are generated due to a condensation of a gas remaining in an inner space of the chamber, and as a result, the substrate is contaminated. In addition, there is a problem in that a process time increases due to a time required for a temperature conversion and a stabilization. 
     As another example, in the case of a multi-stage type which treats multiple substrates in one chamber, there is a problem in that a robot transferring the substrate inside the chamber is contaminated and the contaminants generated by the robot are contaminated. 
     As another example, it a deposition chamber in which a deposition process is performed and an etching chamber in which an etching process is performed are separately configured, the temperature conversion is not required. However, the chamber is opened to transfer the substrate between the deposition chamber and the etching chamber, and thereby an environment inside the chamber changes, making it difficult to maintain optimal process conditions. In addition, in the case of the substrate treating apparatus having a separate deposition chamber and an etching chamber, the apparatus device is larger than the apparatus of the aforementioned embodiment or the aforementioned other embodiment, which is disadvantageous in terms of space utilization. 
     SUMMARY 
     Embodiments of the inventive concept provide a substrate treating apparatus and a substrate treating method for effectively treating a substrate. 
     Embodiments of the inventive concept provide a substrate treating apparatus and a substrate treating method for providing a substrate having a feature of a high aspect ratio by combining a deposition process and an etching process. 
     Embodiments of the inventive concept provide a substrate treating apparatus and a substrate treating method for simultaneously performing a deposition process and an etching process. 
     The technical objectives of the inventive concept are not limited to the above-mentioned ones, and the other unmentioned technical objects will become apparent to those skilled in the art from the following description. 
     The inventive concept provides a substrate treating apparatus. The substrate treating apparatus includes a chamber having an inner space; a separation unit provided at the inner space and configured to be combined with the chamber to divide the inner space into a plurality of treating spaces and a transfer space; a plurality of support units provided at each of the plurality of treating spaces and configured to support a substrate; a plurality of gas supply units provided at each of the plurality of treating spaces and configured to supply a process gas to the substrate supported on the plurality of support units; and a transfer unit provided at the transfer space and configured to transfer the substrate between the plurality of treating spaces. 
     In an embodiment, the chamber includes: a top wall; a bottom wall positioned opposite the top wall; a plurality of side walls connecting the top wall and the bottom wall; a protruding wall which upwardly protrudes from the bottom wall; and a plurality of partition walls, and wherein the separation unit includes: a top plate; a plurality of side plates downwardly extending from an edge of an outer side of the top plate; and a separation plate downwardly extending from the top plate, and wherein the separation plate of the separation unit faces the partition wall, and the side plate of the separation unit wall faces the protruding wall of the chamber. 
     In an embodiment, the separation unit is provided to be movable in an up/down direction within the inner space, and the separation unit is movable between a contact position in which the separation plate of the separation unit contacts the partition wall of the chamber and a separation position which separates the separation plate of the separation unit from the partition wall of the chamber. 
     In an embodiment, the separation unit separates the inner space into the plurality of treating spaces and the transfer space at the contact position. 
     In an embodiment, the side plate of the separation unit includes a first to a fourth side plate which are adjacent to each other, and wherein the separation plate of the separation unit includes: 
     a first separation plate having an end which combines with the first side plate; a second separation plate having an end which combines with the second side plate and the other end which combines with the other end of the first separation plate; a third separation plate having an end which combines with the third side plate; and a fourth separation plate having an end which combines with the second plate and the other which combines with the other end of the third separation plate, and which is spaced apart from the second separation plate, and wherein the plurality of treating spaces includes a first treating space and a second treating space which are spaced apart, and wherein the first treating space is formed in a combination of the first side plate, the second side plate, the first separation plate, and the second separation plate, and the second treating space is formed in a combination of the second side plate, the third side plate, the third separation plate, and the fourth separation plate. 
     In an embodiment, different substrate treatment processes are performed at the first treating space and the second treating space, and wherein any one process among a deposition process and an etching process is performed at the first treating space, and the other one process among the deposition process and the etching process is performed at the second treating space. 
     In an embodiment, the first treating space and the second treating space are positioned to be provided alternately. 
     In an embodiment, a plurality of substrates are taken into the plurality of treating spaces, and different substrate treatment processes are simultaneously performed at the plurality of treating spaces. 
     In an embodiment, the separation unit includes the top plate, a purge gas supply line embedded in the side plate and the separation plate, and a gas supply source for supplying a purge gas to the purge gas supply line, and wherein a discharge port of the purge gas supply line is formed at an end of the side plate and an end of the separation plate, and wherein an air curtain is formed by a supply of the purge gas from the discharge port, if the separation plate is positioned at the separation position. 
     In an embodiment, the separation plate of the separation unit includes: a fifth separation plate having an end which combines with the third side plate and is spaced apart from the third separation plate; a sixth separation plate having an end which combines with the fourth side plate and having the other end combining with the other end of the fifth separation plate; a seventh separation plate having an end which combines with the first side plate and is spaced apart from the first separation plate; and an eighth separation plate having an end which combines with the fourth side plate and having the other end combining with the other end of the seventh plate, and which is spaced apart from the sixth separation plate, and wherein the plurality of treating spaces further comprise a third treating space which is formed by the third side plate, the fourth side plate, the fifth separation plate, and the sixth separation plate, and a fourth treating space which is formed by the fourth side plate, the first side plate, the seventh separation plate, and the eighth separation plate. 
     In an embodiment, the transfer space is formed between the plurality of treating spaces, and the transfer space transfers a substrate which has been treated in each of the plurality of treating spaces in a state at which the separation unit is positioned in the separation position to another treating space in a clockwise direction or in a counter clockwise direction. 
     In an embodiment, the plurality of treating spaces includes four treating spaces or six treating spaces, and the transfer space is formed between the plurality of treating spaces. 
     In an embodiment, processes having a different process temperature from each other are simultaneously performed at the plurality of treating spaces. 
     In an embodiment, the transfer unit includes: a central part at which a rotation shaft is combined; and a plurality of arms which extend from the central part to an outside and which support the substrate, and wherein the plurality of arms are provided in a number corresponding to the plurality of treating spaces. 
     The inventive concept provides a substrate treating method for performing a deposition process and an etching process alternatively while a substrate is sequentially moved through a plurality of treating spaces, at which the deposition process and the etching process is performed simultaneously in one chamber, and the chamber is provided between a plurality of treating spaces which are separated from each other and a plurality of treating spaces and includes a transfer space which has a transfer unit configured to transfer the substrate between the plurality of treating spaces. The substrate treating method includes a depositing which is performed at a portion of the plurality of treating spaces; and an etching which is performed at a remaining portion of the plurality of treating spaces, and wherein a treating space at which the depositing is performed and a treating space at which the etching is performed is positioned in turns, and a substrate on which the depositing has been performed is transferred to the treating space at which the etching is performed by the transfer unit, and a substrate on which the etching has been performed is transferred to the treating space at which the depositing is performed by the transfer unit. 
     In an embodiment, the chamber is separated into the plurality of treating spaces and the transfer space by the separation unit, and wherein the separation unit is movable in an up/down direction. 
     In an embodiment, the separation unit moves between a contact position which contacts the chamber to close each of the plurality of treating spaces, the plurality of treating spaces, and the transfer space, and a separation position which is spaced apart from the chamber to open the plurality of treating spaces and the transfer space, and a process is performed on the substrate if the separation unit is positioned at the contact position, and the transfer unit transfers the substrate if the separation unit is positioned at the separation position. 
     In an embodiment, the separation unit comprises a purge gas supply unit embedded in the separation plate, and a gas supply source for supplying a purge gas to the purge gas supply line, and an air curtain is formed by a supply of the purge gas from the separation unit, if the separation unit is positioned at the separation position. 
     In an embodiment, a process temperature of the depositing and the etching are different from each other. 
     In an embodiment, the plurality of treating spaces are provided in an even number. 
     The inventive concept provides a substrate treating apparatus. The substrate treating apparatus includes a chamber having an inner space; a separation unit provided at the inner space and configured to be combined with the chamber to divide the inner space into a plurality of treating spaces and a transfer space; a plurality of support units provided at each of the plurality of treating spaces and configured to support a substrate; a plurality of gas supply units provided at each of the plurality of treating spaces and configured to supply a process gas to the substrate supported on the plurality of support units; and a transfer unit provided at the transfer space and configured to transfer the substrate between the plurality of treating spaces, and wherein the separation unit is provided to be movable between a contact position in which the separation unit contacts the chamber in the inner space and a separation position in which the separation unit is spaced apart from the chamber, the separation unit divides the plurality of treating spaces and the transfer space by a contact of the separation unit and the chamber if the separation unit is positioned in the contact position, and forms an air curtain to separation the plurality of treating spaces and the transfer space if the separation unit is positioned in the separation position. 
     In an embodiment, a portion of the plurality of treating spaces are provided as a treating space in which a deposition process is performed, and the remaining portion of the plurality of treating spaces are provided as a treating space in which an etching process is performed, and the treating space in which the deposition process is performed and the treating space in which the etching process is formed are positioned in turns. 
     According to an embodiment of the inventive concept, a substrate may be effectively treated. 
     According to an embodiment of the inventive concept, a substrate having a feature of a high aspect ratio may be efficiently treated by combining a deposition process and an etching process. 
     According to an embodiment of the inventive concept, a deposition-etching combination process may be possible in the same chamber without a temperature change by dividing a region for performing a deposition process and a region for performing an etching process. 
     According to an embodiment of the inventive concept, a deposition and an etching process may be independently and simultaneously performed within the same chamber. 
     According to an embodiment of the inventive concept, a possibility of a contamination due to a robot may be minimized by positioning the robot for moving a substrate within the same chamber in a separate region. 
     The effects of the inventive concept are not limited to the above-mentioned ones, and the other unmentioned effects will become apparent to those skilled in the art from the following description. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
       The above and other objects and features will become apparent from the following description with reference to the following figures, wherein like reference numerals refer to like parts throughout the various figures unless otherwise specified, and wherein: 
         FIG.  1    is a plan view illustrating a substrate treating facility according to an embodiment of the inventive concept. 
         FIG.  2    is a plan cross-sectional view of a substrate treating apparatus according to an embodiment of the inventive concept. 
         FIG.  3    is a cross-sectional perspective view of a chamber illustrated in  FIG.  2   . 
         FIG.  4    is a bottom perspective view of a separation unit illustrated in  FIG.  2   . 
         FIG.  5    is a side perspective view of the separation unit illustrated in  FIG.  2   . 
         FIG.  6    is a side cross-sectional view schematically illustrating a state in which a treating space of the substrate treating apparatus of  FIG.  2    is sealed. 
         FIG.  7    is a side cross-sectional view schematically illustrating a state in which the treating space of the substrate treating apparatus of  FIG.  2    is opened. 
         FIG.  8    schematically illustrates illustrating a state in which a substrate treatment process is performed in the substrate treating apparatus according to an embodiment of the inventive concept. 
         FIG.  9    schematically illustrates illustrating a state in which the substrate treatment process is not performed in the substrate treatment apparatus according to an embodiment of the inventive concept. 
         FIG.  10    is a plan view of the separation unit according to an embodiment of the inventive concept. 
         FIG.  11    to  FIG.  17    schematically illustrate a state in which a deposition process and an etching process are alternately carried out on a plurality of substrates in the substrate treating apparatus of  FIG.  2   . 
         FIG.  18    illustrates a modified embodiment of the substrate treating apparatus of  FIG.  2   . 
     
    
    
     DETAILED DESCRIPTION 
     The inventive concept may be variously modified and may have various forms, and specific embodiments thereof will be illustrated in the drawings and described in detail. However, the embodiments according to the concept of the inventive concept are not intended to limit the specific disclosed forms, and it should be understood that the present inventive concept includes all transforms, equivalents, and replacements included in the spirit and technical scope of the inventive concept. In a description of the inventive concept, a detailed description of related known technologies may be omitted when it may make the essence of the inventive concept unclear. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the inventive concept. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. Also, the term “exemplary” is intended to refer to an example or illustration. 
     It will be understood that, although the terms “first”, “second”, “third”, etc., may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the inventive concept. 
     Hereinafter, embodiments of the inventive concept will be described in detail with reference to the accompanying drawings. 
     In an embodiment of the inventive concept, a process of treating the substrate W using a plasma or a gas other than the plasma will be described as an example. According to an embodiment of the inventive concept, a process of treating the substrate W by repeatedly performing a deposition process and an etching process will be described as an example. However, an embodiment of the inventive concept is not limited to this, and can be applied in various ways to a substrate treatment process using a liquid such as a cleaning process, an ashing process, and a developing process. 
     Here, the substrate is a comprehensive concept which includes both a semiconductor element, a flat panel display (FPD), and other substrates used to manufacture objects with a circuit pattern formed on a thin film. Examples of such substrates W include silicon wafers, glass substrates, and organic substrates. 
     Hereinafter, an embodiment of the inventive concept will be described in detail with reference to  FIG.  1    to  FIG.  18   . 
       FIG.  1    is a plan view illustrating a substrate treating facility according to an embodiment of the inventive concept. Referring to  FIG.  1   , the substrate treating facility  1  may include an index module  10 , a treating module  20 , and a load lock module  30 . 
     The index module  10  may include a load port  120  and a transfer frame  140 . The load port  120 , the transfer frame  140 , the load lock module  30 , and the treating module  20  may be sequentially arranged in a direction. Hereinafter, a direction in which the load port  120 , the transfer frame  140 , the load lock module  30 , and the treating module  20  are arranged is referred to as a first direction  12 , a direction perpendicular to the first direction  12  is referred to as a second direction  14 , and a direction perpendicular to a plane including both the first direction  12  and the second direction  14  is referred to as a third direction  16 . The third direction  16  may be a direction perpendicular to both the first direction  12  and the second direction  14 . 
     A cassette  18  in which a plurality of substrates W are stored may be mounted on the load port  120 . A plurality of load ports  120  may be provided. The plurality of load ports  120  may be arranged in a direction along the second direction  14 . The plurality of load ports  120  may be disposed to be spaced apart from each other in the second direction  14 . Although  FIG.  1    illustrates that four load ports  120  are provided, the inventive concept is not limited thereto, and the number of load ports  120  may increase or decrease according to conditions such as a processing efficiency and a footprint of the treating module  20 . 
     A slot (not shown) supporting an edge region of the substrate W may be formed in the cassette  18 . The slot may include a plurality of slots. The plurality of slots may be formed to be spaced apart from each other along the third direction  16 . A plurality of substrates W are supported on the plurality of slots, in which case the plurality of substrates W may be placed in the cassette  18  to be stacked in a state spaced apart from each other along the third direction  16 . A front opening unified pod (FOUP) may be used as the cassette  18 . 
     The transfer frame  140  transfers the substrate W between the cassette  18  mounted on the load port  120  and the load lock module  30 . The transfer frame  140  may be arranged in the first direction  12  with the load port  120 . The transfer frame  140  may be disposed between the load port  120  and the load lock module  30 . The transfer frame  140  may be provided with an index rail  142  and an index robot  144 . A lengthwise direction of the index rail  142  may be formed parallel to the second direction  14 . The index robot  144  may be installed on the index rail  142 . The index robot  144  may be provided to be movable on the index rail  142 . The index robot  144  may be provided to be linearly moved in the second direction  14  along the index rail  142 . The index robot  144  may include a base  144   a , a body  144   b , an index arm  144   c , and a hand  144   d . The base  144   a  may be installed to be movable along the index rail  142 . The body  144   b  may be coupled to the base  144   a . The body  144   b  may be provided to be movable along the third direction  16  on the base  144   a . The body  144   b  may be rotatably provided on the base  144   a . The index arm  144   c  may be coupled to the body  144   b . The index arm  144   c  may be provided to be forwardly and backwardly movable with respect to the body  144   b . The index arm  144   c  may include a plurality of index arms  144   c . The plurality of index arms  144   c  may be individually driven. The plurality of index arms  144   c  may be stacked in a state of being spaced apart from each other along the third direction  16 . Some of the plurality of index arms  144   c  may be used when the substrate W is transferred from the treating module  20  to the cassette  18 . The others among the plurality of index arms  144   c  may be used when the substrate W is transferred from the cassette  18  to the treating module  20 . In this case, particles generated from the substrate W before a treatment can be prevented from being attached to the substrate W after the treatment in a process of bringing in or taking out the substrate W by the index robot  144 . 
     The load lock module  30  can switch an inner atmosphere of the load lock module  30  between an atmospheric pressure atmosphere and a vacuum atmosphere to transfer the substrate W between the transfer frame  140  and the transfer unit  240 . The load lock module  30  may convert the atmospheric pressure atmosphere of the index module  10  into the vacuum atmosphere of the treating module  20  or the vacuum atmosphere of the treating module  20  into the atmospheric pressure atmosphere of the index module  10 . It may be disposed between the transfer frame  140  and the transfer unit  240 . A door (not shown) for opening and closing an opening through which the substrate W is transferred may be installed between the load lock module  30  and the transfer frame  140 . A gate valve (not shown) for opening and closing the opening to which the substrate W is transferred may be installed between the load lock module  30  and the transfer unit  240 . The load lock module  30  may provide a space in which the substrate W remains before the substrate W is transferred between the transfer frame  140  and the transfer unit  240 . The load lock module  30  may include a load lock chamber  32  and an unload lock chamber  34 . 
     The load lock chamber  32  may provide a space in which the substrate W transferred from the index module  10  to the treating module  20  temporarily remains. Before the substrate W is taken into the load lock chamber  32  from the index module  10 , the load lock chamber  32  may maintain the atmospheric pressure atmosphere. In this case, the load lock chamber  32  may be maintained in an open state with respect to the index module  10  and may be blocked with respect to the treating module  20 . That is, the door between the load lock chamber  32  and the index module  10  is opened, and the gate valve between the load lock chamber  32  and the transfer unit  240  may be maintained in a closed state. If the substrate W is taken into the load lock chamber  32 , an inner space of the load lock chamber  32  may be sealed with respect to each of the index module  10  and the treating module  20 . That is, the door between the load lock chamber  32  and the index module  10  and the gate valve between the load lock chamber  32  and the transfer unit  240  may all remain closed. Thereafter, the inner space of the load lock chamber  32  may be converted from the atmospheric pressure atmosphere to the vacuum atmosphere. Thereafter, the load lock chamber  32  may be opened with respect to the treating module  20  in a state of being blocked with respect to the index module  10 . That is, the door between the load lock chamber  32  and the index module  10  may be closed, and the gate valve between the load lock chamber  32  and the transfer unit  240  may be opened. 
     The unload lock chamber  34  may provide a space in which the substrate W transferred from the treating module  20  to the index module  10  temporarily remains. Before the substrate W is taken into the unload lock chamber  34  from the treating module  20 , the unload lock chamber  34  may maintain the vacuum atmosphere. In this case, the unload lock chamber  34  may remain open with respect to the treating module  20  and may be blocked with respect to the index module  10 . That is, the gate valve between the unload lock chamber  34  and the transfer unit  240  may be opened, and the door between the unload lock chamber  34  and the index module  10  may be maintained in a closed state. If the substrate W is taken into the unload lock chamber  34 , the inner space of the unload lock chamber  34  may be sealed with respect to each of the index module  10  and the treating module  20 . That is, the door between the unload lock chamber  34  and the index module  10  and the gate valve between the unload lock chamber  34  and the transfer unit  240  may all remain closed. Thereafter, the inner space of the unload lock chamber  34  may be converted from the vacuum atmosphere to the atmospheric pressure atmosphere. Thereafter, the unload lock chamber  34  may be opened with respect to the index module  10  in a state of being blocked with respect to the treating module  20 . That is, the door between the unload lock chamber  34  and the index module  10  may be opened, and the gate valve between the unload lock chamber  34  and the transfer unit  240  may be closed. 
     The treating module  20  may include a transfer unit  220  and a substrate treating apparatus  300 . 
     The transfer unit  220  may transfer the substrate W between the load lock chamber  32 , the unload lock chamber  34 , and a plurality of substrate treating apparatuses  300 . 
     The transfer unit  220  may include a transfer chamber  222 . The transfer chamber  222  may have a rectangular cross section. However, the inventive concept is not limited thereto, and the transfer chamber  222  may have various shapes including a polygonal shape such as a pentagon or a hexagon in a cross section. According to the shape of the transfer chamber  222 , the substrate treating facility  1  may be classified into a linear type or a cluster type. That is, the substrate treating facility  1  according to an embodiment of the inventive concept may be provided in a linear type or a cluster type. 
     The transfer unit  222  may be provided with a transfer rail  224  and a transfer robot  226 . The transfer rail  224  may be formed in a lengthwise direction parallel to the first direction  12 . The transfer robot  226  may be installed on the transfer rail  224 . The transfer robot  226  may be provided to be movable along the transfer rail  224 . The transfer robot  226  may be provided to move linearly in the first direction  12  along the transfer rail  224 . The transfer robot  226  may include a base  226   a , a body  226   b , a transfer arm  226   c , and a hand  226   d . The base  226   a  may be installed to be movable along the transfer rail  224 . The body  226   b  may be coupled to the base  226   a . The body  226   b  may be provided to be movable along the third direction  16  on the base  226   a . The body  226   b  may be rotatably provided on the base  226   a . The transfer arm  226   c  may be coupled to the body  226   b . The transfer arm  226   c  may be provided to move forward and backward with respect to the body  226   b . The transfer arm  226   c  may include a plurality of transfer arms  226   c . A plurality of transfer arms  226   c  may be individually driven. The plurality of transfer arms  226   c  may be stacked in a state of being spaced apart from each other along the third direction  16 . The plurality of transfer arms  226   c  may simultaneously transfer the plurality of substrates W to the substrate treating apparatus  300 . In an embodiment, the plurality of transfer arms  226   c  may simultaneously transfer an even number of substrates W to the substrate treating apparatus  300 . 
     The substrate treating apparatus  300  may be coupled to the transfer chamber  222 . The plurality of substrate treating apparatuses  300  may be connected to the transfer chamber  222 . The plurality of substrate treating apparatuses  300  may be positioned on both side surfaces of the transfer chamber  222 . A gate valve may be installed between the transfer chamber  222  and the substrate treating apparatus  300  to open and close a transfer port (not shown) through which the substrate W is taken in and out. A transfer space for transferring the substrate W may be formed inside the transfer chamber  222 . The transfer space may be provided in a vacuum environment. 
     Hereinafter, the substrate treating apparatus  300  according to an embodiment of the inventive concept will be described in detail with reference to the drawings. 
       FIG.  2    is a cross-sectional view of a substrate treating apparatus according to an embodiment of the inventive concept,  FIG.  3    is a cross-sectional perspective view of the chamber illustrated in  FIG.  2   ,  FIG.  5    is a cross-sectional perspective view of a separation unit illustrated in  FIG.  2   ,  FIG.  6    is a side cross-sectional view schematically illustrating when a treating space of the substrate treating apparatus of  FIG.  2    is sealed,  FIG.  7    is a side cross-sectional view schematically illustrating when the treating space of the substrate treating apparatus is opened,  FIG.  8    schematically illustrates a state when the substrate treatment is performed in the substrate treating apparatus according to an embodiment of the inventive concept,  FIG.  9    schematically illustrates a state when the substrate treatment process is not performed in the substrate treatment apparatus according to an embodiment of the inventive concept,  FIG.  10    is a schematic view of a separation unit according to an embodiment of the inventive concept,  FIG.  11    to  FIG.  17    are schematic views of a plurality of substrate treating apparatuses alternately performing a deposition process and an etching processes, and  FIG.  18    is a view showing a modified embodiment of the substrate treating apparatus of  FIG.  2   . 
     Referring to  FIG.  2   , the substrate treating apparatus  300  may include a chamber  320 . An inner space  302  may be formed therein in the chamber  320 . The chamber  320  may store the plurality of substrates W in the inner space  302 . A cross section of the chamber  320  may be formed in a rectangular shape. However, the inventive concept is not limited thereto, and may be provided in various shapes capable of accommodating the plurality of substrates W. 
     A plurality of treating spaces and transfer spaces are formed in the inner space  302  of the chamber  320  as described below, and a plurality of support units  340  supporting the substrate W and a gas supply unit  360  supplying a process gas to the substrate W supported by each of the plurality of support units  340  may be provided. The support unit  340  and the gas supply unit  360  may be provided in a number corresponding to the number of the plurality of treating spaces. 
     The gas supply unit  360  may include a gas supply line  362  which supplies a process gas and a purge gas supply line  364  installed outside the gas supply line  362 . Each of multiple gas supply units  360  may supply different process gases to each treating space in accordance with the type of treatment process which is performed on the substrate W. In an embodiment, the gas supply unit  360  disposed in the treating space in which a deposition process is performed on the substrate may supply a deposition gas to the treating space, and the gas supply unit  360  disposed in the treating space in which an etching process is performed on the substrate may supply an etching gas to the respective treating space. If the treatment process is performed on a plurality of substrates in each treating space, the purge gas supply line  364  may supply a purge gas to the treating space to form an air curtain flow. Accordingly, a downward airflow is formed in the treating space, and each enclosed treating space may be maintained in a clean state. If the separation unit  400  descends to seal the plurality of treating spaces, the purge gas supply line  364  may supply the purge gas to each of the plurality of treating spaces to form the air curtain flow. During the process (if the separation unit  400  descends to seal each treating space), the air curtain flow formed from the purge gas supply line  364  may guide a flow of the reaction gas supplied to each treating space from the gas supply line  362 . For example, the flow of the reaction gas may be guided so that the reaction gas is well exhausted to an exhaust pipe (not shown) exhausting each treating space. In addition, since the air curtain flow supplied and formed from the purge gas supply line  364  flows along an outer wall of a stage defining each treating space, it is possible to prevent a contamination of the outer wall of the stage, such as an attaching/adhering of the reaction gas to the outer wall of each stage. 
     If the separation unit  400  rises to open each treating space (if the process is not performed and the substrate is moved by the transfer unit), the air curtain flow supplied from the purge gas supply line  364  may prevent the reaction gas in each treating space from flowing into the adjacent treating space, just like the air curtain which is supplied and formed from the separation unit  400 . 
     Referring to  FIG.  2    and  FIG.  3   , the chamber  320  may include a top wall  322 , a bottom wall  324  disposed opposite the top wall  322 , and a plurality of sidewalls  326  connecting the top wall  322  and the bottom wall  324 . A transfer port (not shown) through which the substrate W is taken into and/or taken out may be formed in any one sidewall  326  of the plurality of sidewalls  326 , and the transfer port may be opened and closed through the gate valve described above. The inner space  302  of the chamber  320  may be formed by combining the top wall  322 , the bottom wall  324 , and the plurality of sidewalls  236 . The plurality of sidewalls  326  may include a first to a fourth sidewall  3262 ,  3264 ,  3266 , and  3268  adjacent to each other. 
     The chamber  320  may include a plurality of protruding walls  327  upwardly protruding from the bottom wall  324 . The plurality of protruding walls  327  may inwardly protrude from a plurality of sidewalls  326 . The plurality of protruding walls  327  may extend along an inner surface of the plurality of sidewalls  326 . The plurality of protruding walls  327  may include a first to a fourth protruding wall  3272 ,  3274 ,  3276 , and  3278 . The first protruding wall  3272  may inwardly protrude from the first sidewall  3262 . The second protruding wall  3274  may inwardly protrude from the second sidewall  3264 . The third protruding wall  3276  may inwardly protrude from the third sidewall  3266 . The fourth protruding wall  3278  may inwardly protrude from the fourth sidewall  3268 . The first to fourth protruding walls  3272 ,  3274 ,  3276 , and  3278  may combine to form a rectangular ring having a space formed therein. The plurality of protruding walls  327  may be provided in a number corresponding to the side plate  420  of the separation unit  400  to be described later. 
     The protruding wall  327  may be provided to have a height lower than that of the sidewall  326 . In an embodiment, the protruding wall  327  may be formed to have the same height as the support unit  340  to be described later. Alternatively, the protruding wall  327  may be formed to have a height lower than that of the support unit  340 . Accordingly, if the substrate W is transferred by the transfer unit  380  to be described later, an interference or a collision with the protruding wall  327  may be avoided. 
     The protruding wall  327  may face the side plate  420  of the separation unit  400  to be described later. A top surface of the protruding wall  327  may be spaced apart from the side plate  420  or may contact the side plate  420  as the separation unit  400  moves in the vertical direction. The first protruding wall  3272  may face a first side plate  422 , the second protruding wall  3274  may face a second side plate  424 , the third protruding wall  3276  may face a third side plate  426 , and the fourth protruding wall  3278  may face a fourth side plate  428 . 
     The chamber  320  may include a plurality of partition walls  328  upwardly protruding from the bottom wall  324 . The plurality of partition walls  328  may be provided in a number corresponding to a separation plate  430  of the separation unit  400  to be described later. The partition wall  328  may be provided at a height corresponding to the protruding wall  327 . The partition wall  328  may be provided at a height corresponding to the support unit  340 . Alternatively, the partition wall  328  may be provided at a height lower than that of the support unit  340 . Accordingly, if the substrate W is transferred by the transfer unit  380  to be described later, an interference or a collision with the partition wall  328  may be avoided. 
     The partition wall  328  may face the separation plate  430  of the separation unit  400  to be described later. A top surface of the partition wall  328  may be spaced apart from the separation plate  430  or may contact the separation plate  430  as the separation unit  400  moves in the vertical direction. 
     The partition wall  328  may include a first partition wall  3281  having an end coupled to the first protruding wall  3272  and a second partition wall  3282  having an end coupled to the second protruding wall  3274  and the other end coupled to the other end of the first partition wall  3281 . The first partition wall  3281  may face the second protruding wall  3274 . The first partition wall  3281  may be spaced apart from the second protruding wall  3274 . The second partition wall  3282  may face the first protruding wall  3272 . The second partition wall  3282  may be spaced apart from the first protruding wall  3272 . The first protruding wall  3272 , the second protruding wall  3274 , the first partition wall  3281 , and the second partition wall  3282  may be combined to form a first treating space  303 . 
     The first partition wall  3281  may face a first separation plate  431  to be described later, and the second partition wall  3282  may face a second separation plate  432  to be described later. The first partition wall  3281  may contact the first separation plate  431 , and the second partition wall  3282  may contact the second separation plate  432 , if the separation unit  400  is downwardly moved. The first partition wall  3281  may be separated from the first separation plate  431 , and the second partition wall  3282  may be separated from the second separation plate  432 , if the separation unit  400  is upwardly moved. 
     The partition wall  328  may include a third partition wall  3283  having an end coupled to the third protruding wall  3276  and a fourth partition wall  3284  having an end coupled to the second protruding wall  3274  and the other end coupled to the other end of the third partition wall  3283 . The third partition wall  3283  may face the second protruding wall  3274 . The third partition wall  3283  may be spaced apart from the second protruding wall  3274 . The fourth partition wall  3284  may face the third protruding wall  3276 . The fourth partition wall  3284  may face the second partition wall  3282 . The fourth partition wall  3284  may be spaced apart from the third protruding wall  3276 . The second protruding wall  3274 , the third protruding wall  3276 , the third partition wall  3283 , the fourth partition wall  3284  may be combined to form the second treating space  304 . 
     The third partition wall  3283  may face a third separation plate  433  to be described later, and the fourth partition wall  3284  may face a fourth separation plate  434  to be described later. If the separation unit  400  is downwardly moved, the third partition wall  3283  may contact the third separation plate  433 , and the fourth partition wall  3284  may contact the fourth separation plate  434 . The third partition wall  3283  may be separated from the third separation plate  433 , and the fourth partition wall  3284  may be separated from the fourth separation plate  434 , if the separation unit  400  is upwardly moved. 
     The partition wall  328  may include a fifth partition wall  3285  having an end coupled to the third protruding wall  3276  and a sixth partition wall  3286  having an end coupled to the fourth protruding wall  3278  and the other end coupled to the other end of the fifth partition wall  3285 . The fifth partition wall  3285  may face the fourth protruding wall  3278 . The fifth partition wall  3285  may face the third partition wall  3283 . The sixth partition wall  3286  may be spaced apart from the third protruding wall  3276 . The sixth partition wall  3286  may face the third protruding wall  3276 . The third protruding wall  3276 , the fourth protruding wall  3278 , the fifth partition wall  3285  and the sixth partition wall  3286  may be combined to form a third treating space  305 . 
     The fifth partition wall  3285  may face the fifth separation plate  435  to be described later in the vertical direction, and the sixth partition wall  3286  may face the sixth separation plate  436  to be described later in the vertical direction. If the separation unit  400  is downwardly moved, the fifth partition wall  3285  may contact the fifth separation plate  435 , and the sixth partition wall  3286  may contact the sixth separation plate  436 . If the separation unit  400  is upwardly moved, the fifth partition wall  3285  may be separated from the fifth separation plate  435 , and the sixth partition wall  3286  may be separated from the sixth separation plate  436 . 
     The partition wall  328  may include a seventh partition wall  3287  having an end coupled to the first protruding wall  3272  and an eighth partition wall  3288  having an end coupled to the fourth protruding wall  3278  and the other end coupled to the other end of the seventh partition wall  3287 . The seventh partition wall  3287  may face the fourth protruding wall  3278 . The seventh partition wall  3287  may face the first partition wall  3281 . The eighth partition wall  3288  may be spaced apart from the first protruding wall  3272 . The eighth partition wall  3288  may face the first protruding wall  3272 . The first protruding wall  3272 , the fourth protruding wall  3278 , the seventh partition wall  3287  and the eighth partition wall  3288  may be combined to form a fourth treating space  306 . 
     The seventh partition wall  3287  may face the seventh separation plate  437  to be described later in the vertical direction, and the eighth partition wall  3286  may face the eighth separation plate  438  to be described later in the vertical direction. If the separation unit  400  is downwardly moved, the seventh partition wall  3287  may contact the seventh separation plate  437 , and the eighth partition wall  3288  may contact the eighth separation plate  438 . The seventh partition wall  3287  may be separated from the seventh separation plate  437 , and the eighth partition wall  3288  may be separated from the eighth separation plate  438 , if the separation unit  400  is upwardly moved. 
     Referring to  FIG.  2   ,  FIG.  4   , and  FIG.  5   , the substrate treating apparatus  300  may include a separation unit  400 . The separation unit  400  may be provided in the inner space  302  of the chamber  320 . The separation unit  400  may be combined with the chamber  320  to separate the inner space  302  into a plurality of treating spaces  303  to  306  and a transfer space  307 . 
     The separation unit  400  may include a top plate  410 , a side plate  420  downwardly extending from an outer edge of the top plate  410 , and a separation plate  430  downwardly extending from the top plate  410 . 
     The top plate  410  may face the top wall  322  of the chamber  320 . The top plate  410  may be formed in a shape corresponding to the top wall  322  of the chamber  320 . In an embodiment, the top plate  410  may be provided in a rectangular shape. The top plate  410  is provided under the top wall  322  and may be spaced apart from the top wall  322 . 
     The side plate  420  may face the protruding wall  327 . The side plate  420  may be provided on the protruding wall  327 . The side plate  420  may vertically overlap the protruding wall  327 . The side plate  420  may vertically overlap at least a portion of the protruding wall  327 . A cross-sectional area of the side plate  420  may be provided as a smaller cross-sectional area than that of the protruding wall  327 . An inner surface of the side plate  420  may be positioned on the same plane as the inner surface of the protruding wall  327 , and the outer surface of the side plate  420  may be positioned inside the outer surface of the protruding wall  327 . The outer surface of the side plate  420  may be positioned inward than the inner surface of the sidewall  326  of the chamber  320 . The outer surface of the side plate  420  may be spaced apart from the inner surface of the sidewall  326  of the chamber  320 . 
     The side plate  420  may include a plurality of side plates  420 . The plurality of side plates  420  may be provided in a number corresponding to the protruding wall  327  of the chamber  320 . In an embodiment, the plurality of side plates  420  may include a first to a fourth side plate  422 ,  424 ,  426 , and  428 . The bottom end of the side plate  420  may contact the protruding wall  327  or may be spaced apart from the protruding wall  327  as the separation unit  400  moves in the vertical direction. 
     The separation plate  430  may face the partition wall  328 . The separation plate  430  may vertically overlap the partition wall  328 . The separation plate  430  may be provided on the partition wall  328 . The separation plate  430  may be provided inside the side plate  420 . The separation plate  430  may include the plurality of separation plates  430 . The plurality of separation plates  430  may be provided in a number corresponding to the plurality of partition walls  328 . 
     The plurality of separation plates  430  may include a first separation plate  431  having an end coupled to the first side plate  422  and a second separation plate  432  having an end coupled to the second side plate  424  and the other end coupled to the other end of the first separation plate  431 . The first separation plate  431  may face the second side plate  424 . The first separation plate  431  may be spaced apart from the second side plate  424 . The first separation plate  431  may face the seventh separation plate  437 . The first separation plate  431  may be provided on the first partition wall  3281 . The first separation plate  431  may vertically overlap the first partition wall  3281 . The second separation plate  432  may face the first side plate  422 . The second separation plate  432  may be spaced apart from the first side plate  422 . The second separation plate  432  may face the fourth separation plate  434 . The second separation plate  432  may be spaced apart from the fourth separation plate  434 . The second separation plate  432  may be provided on the second partition wall  3282 . The second separation plate  432  may vertically overlap the second partition wall  3282 . The first side plate  422 , the second side plate  424 , the first separation plate  431 , and the second separation plate  432  may be combined with each other to form a first treating space  303 . The first side plate  422 , the second side plate  424 , the first separation plate  431 , and the second separation plate  432 , which define the first treating space  303 , may be referred to as the first stage. That is, the chamber  320  may mean one entire chamber including a plurality of treating spaces, and may mean a portion defining each treating space separated by the separation unit  400  (the first stage described above). 
     The plurality of separation plates  430  may include a third separation plate  433  having an end coupled to the third side plate  426 , and a fourth separation plate  434  having an end coupled to the second side plate  424  and the other end coupled to the other end of the third separation plate  433 . The third separation plate  433  may face the second side plate  424 . The third separation plate  433  may be spaced apart from the second side plate  424 . The third separation plate  433  may face the fifth separation plate  435 . The third separation plate  433  may be spaced apart from the fifth separation plate  435 . The third separation plate  433  may be provided on the third partition wall  3283 . The third separation plate  433  may vertically overlap the third partition wall  3283 . The fourth separation plate  434  may face the third side plate  426 . The fourth separation plate  434  may be spaced apart from the third side plate  426 . The fourth separation plate  434  may face the second separation plate  432 . The fourth separation plate  434  may be spaced apart from the second separation plate  432 . The fourth separation plate  434  may be provided on the fourth partition wall  3284 . The fourth separation plate  434  may vertically overlap the fourth partition wall  3284 . The second side plate  424 , the third side plate  426 , the third separation plate  433 , and the fourth separation plate  434  may be combined with each other to form a second treating space  304 . The second side plate  424 , the third side plate  426 , the third separation plate  433 , and the fourth separation plate  434 , which define the second treating space  302 , may be referred to as a second stage. That is, the chamber  320  may mean one entire chamber including a plurality of treating spaces, and may mean a portion defining each treating space separated by the separation unit  400  (the second stage described above). 
     The plurality of separation plates  430  may include a fifth separation plate  435  having an end coupled to the third side plate  426 , and a sixth separation plate  436  having an end coupled to the fourth side plate  428  and the other end coupled to the other end of the fifth separation plate  435 . The fifth separation plate  435  may face the fourth side plate  428 . The fifth separation plate  435  may be spaced apart from the fourth side plate  428 . The fifth separation plate  435  may face the third separation plate  433 . The fifth separation plate  435  may be spaced apart from the third separation plate  433 . The fifth separation plate  435  may be provided on the fifth partition wall  3285 . The fifth separation plate  435  may vertically overlap the fifth partition wall  3285 . The sixth separation plate  436  may face the third side plate  426 . The sixth separation plate  436  may be spaced apart from the third side plate  426 . The sixth separation plate  436  may face the eighth separation plate  438 . The sixth separation plate  436  may be spaced apart from the eighth separation plate  438 . The sixth separation plate  436  may be provided on the sixth partition wall  3286 . The sixth separation plate  436  may vertically overlap the sixth partition wall  3286 . The third side plate  426 , the fourth side plate  428 , the fifth separation plate  435 , and the sixth separation plate  436  may be combined with each other to form a third treating space  305 . The third side plate  426 , the fourth side plate  428 , the fifth separation plate  435 , and the sixth separation plate  436  defining the third treating space  305  may be referred to as a third stage. That is, the chamber  320  may mean one entire chamber including a plurality of treating spaces, and may mean a portion defining each treating space separated by the separation unit  400  (the third stage described above). 
     The plurality of separation plates  430  may include a seventh separation plate  437  having an end coupled to the first side plate  422  and an eighth separation plate  438  having an end coupled to the fourth side plate  428  and the other end coupled to the other end of the seventh separation plate  437 . The seventh separation plate  437  may face the fourth side plate  428 . The seventh separation plate  437  may be spaced apart from the fourth side plate  428 . The seventh separation plate  437  may face the first separation plate  431 . The seventh separation plate  437  may be spaced apart from the first separation plate  431 . The seventh separation plate  437  may be provided on the seventh partition wall  3287 . The seventh separation plate  437  may vertically overlap the seventh partition wall  3287 . The eighth separation plate  438  may face the first side plate  422 . The eighth separation plate  438  may be spaced apart from the first side plate  422 . The eighth separation plate  438  may face the sixth separation plate  436 . The eighth separation plate  438  may be spaced apart from the sixth separation plate  436 . The eighth separation plate  438  may be provided on the eighth partition wall  3288 . The eighth separation plate  438  may vertically overlap the eighth partition wall  3288 . The fourth side plate  428 , the first side plate  422 , the seventh separation plate  437 , and the eighth separation plate  438  may be combined with each other to form a fourth treating space. The fourth side plate  428 , the first side plate  422 , the seventh separation plate  437 , and the eighth separation plate  438 , which define the fourth treating space  306 , may be referred to as the fourth stage. That is, the chamber  320  may mean one entire chamber including a plurality of treating spaces, and may mean a portion defining each treating space separated by the separation unit  400  (the fourth stage described above). That is, the chamber  320  may mean an entire chamber including a first to a fourth stage or may mean each of the first to fourth stages. 
     Referring to  FIG.  6    and  FIG.  7   , the separation unit  400  may be provided to be movable in a vertical direction in the inner space  302 . The separation unit  400  may be vertically moved in the inner space  302  by a driving unit (not shown). The driving unit (not shown) may include a motor. The separation unit  400  may be provided movable between a contact position at which the separation plate  430  contacts the partition wall  328  and a separation position at which the separation plate  430  is spaced apart from the partition wall  328 . The separation unit  400  may be provided movable between a contact position at which the side plate  420  contacts the protruding wall  327  and a separation position at which the side plate  420  is spaced apart from the protruding wall  327 . The separation unit  400  seals the treating space at the contact position and opens the treating space at the separation position. 
     Referring to  FIG.  8   , if the separation unit  400  is positioned at the contact position and each treating space is sealed, a set substrate treatment process is performed in each treating space. In this case, the gas supply line  362  supplies a process gas used in the set substrate treatment process to each treating space. In addition, a purge gas supply line  364  can maintain each treating space in a clean state by supplying a purge gas (comprising the process gas) to each treating space to form a downward airflow. In addition, a air curtain flow is formed in each treating space due to the purge gas, and the process gas can be prevented from flowing into other treating spaces through a fine gap between the separation unit  400  and the chamber  320  through the air curtain flow. 
     Referring to  FIG.  9   , the separation unit  400  may include a purge gas supply unit  440 . The purge gas supply unit  440  may include a purge gas supply line  442  and a purge gas supply source  444  supplying the purge gas to the purge gas supply line  442 . The purge gas supply line  442  may be embedded in the top plate  410 , a plurality of side plates  420 , and a plurality of separation plates  430 . The purge gas supply source  444  may supply the purge gas to the purge gas supply line  442 . The purge gas may be provided as an inert gas such as an nitrogen gas N 2 , an argon gas Ar, or the like. A discharge port of the purge gas supply line  442  may be formed at an end of each of the plurality of side plates  420  and an end of each of the plurality of separation plates  430 . The purge gas supply unit  440  may supply the purge gas through an outlet of the purge gas supply line  442  if the separation unit  400  is positioned at a separation position. In this case, the supplied purge gas may form an air curtain. Accordingly, even if the separation unit  400  chamber  320  is separated from the plurality of protruding walls  327  and the plurality of partition walls  328 , the plurality of treating spaces and transfer spaces can be maintained in a separated state by the air curtain. Accordingly, it is possible to prevent the process gas used in each treating space from being mixed. In addition, it is possible to prevent by-products and foreign substances generated after treatment in each treating space from flowing into other treating spaces or transfer spaces. 
     Referring to  FIG.  2    to  FIG.  5   , the inner space  302  of the chamber  320  may include a plurality of treating spaces and a transfer space. The plurality of treating spaces and transfer spaces may be separated as the separation unit  400  is positioned at the contact position. In an embodiment, the plurality of treating spaces may include a first to a fourth treating space. The first treating space  303  is separated from other spaces by contact with a part of the chamber  320  including the first protruding wall  3272 , the second protruding wall  3274 , the first partition wall  3281  and the second partition wall  3282 , and a part of the separation unit  400  including the first side plate  422 , the second side plate  424 , the first separation plate  431  and the second separation plate  432 . The first treating space  303  is separated from other spaces by contact with a part of the chamber  320  including the second protruding wall  3274 , the third protruding wall  3276 , the third partition wall  3283  and the fourth partition wall  3284 , and a part of the separation unit  400  including the second side plate  424 , the third side plate  426 , the third separation plate  434 , and the fourth separation plate  434 . The third treating space  305  is separated from other spaces by contact with a portion of the chamber  320  including the fourth protruding wall  3278 , the first protruding wall  3272 , the seventh partition wall  3287  and the eighth partition wall  328  and the fourth side plate  428 , the first side plate  422 , the seventh separation plate  437 . The fourth treating space  306  is separated from other spaces by contact with parts of the chamber  320  including the third protruding wall  3276 , the fourth protruding wall  3278 , the fifth partition wall  3285  and the sixth partition wall  3286 , and the third side plate  426 , the fourth side plate  428 , the fifth separation plate  435 , and the sixth separation plate  436 . 
     The transfer space  307  is formed between the first to the fourth treating spaces  303  to  306 . The transfer space  307  may include a central area  3071 , a first region  3072  between the first treating space  303  and the second treating space  304 , a second region  3073  between the second treating space  304  and the third treating space  306 , and a third region  3074  between the third treating space  305  and the fourth treating space  306 , and a fourth region  3075  between the fourth treating space  306  and the first treating space  303 . 
     The transfer unit  500  may be provided in the transfer space  307 . The transfer unit  500  may transfer the substrate W when the separation unit  400  is positioned at a separation position. The transfer unit  500  may transfer a plurality of substrates W taken into each of a plurality of treating spaces between a plurality of treating spaces. The transfer unit  500  may transfer the substrate W, which has been taken into each of the plurality of treating spaces and fully treated, to an adjacent treating space. The transfer unit  500  may simultaneously transfer the plurality of substrates W taken in each of the plurality of treating spaces. The transfer unit  500  may simultaneously transfer the plurality of substrates W in a clockwise or counterclockwise direction. 
     The transfer unit  500  may include a central part  520  installed in a central region of the transfer space, and a plurality of arms  540  outwardly extending from the central part  520  and supporting the substrate W. The central part  520  may be rotatably provided. The central part  520  may be provided to be rotatable at a predetermined angle. The central part  520  may include a base  522 , a rotation shaft  524  rotatably coupled to the base  522 , and a body  526  coupled to the rotation shaft  524  and rotating with the rotation shaft  524 . The plurality of arms  540  are coupled to the body  526 , and may be rotated together as the body  526  is rotated. 
     The plurality of arms  540  are provided in a number corresponding to the number of the plurality of treating spaces. In an embodiment, if a plurality of treating spaces include four treating spaces, the plurality of arms  540  may include four arms. If the plurality of treating spaces include six treating spaces, the plurality of arms  540  may include six arms. Hereinafter, an embodiment in which the plurality of arms  540  include four arms will be described. 
     The plurality of arms  540  may include a first to a fourth arm  542 ,  544 ,  546 , and  548 . The plurality of arms  540  may be spaced apart from each other. The first arm  542  may extend from the central part  520  to the first region of the transfer space, the second arm  544  may extend from the central part  520  to the second region of the transfer space, the third arm  546  may extend from the central part  520  to the fourth region of the transfer space. The first arm  542  may transfer the substrate between the first treating space  303  and the second treating space  304 . The second arm  544  may transfer the substrate between the second treating space  304  and the third treating space  305 . The third arm  546  may transfer the substrate between the third treating space  305  and the fourth treating space  306 . The fourth arm  458  may transfer the substrate between the fourth treating space  306  and the first treating space  303 . 
     The plurality of arms  540  may be provided with hands (not shown) supporting the substrate W. The hand may adsorb and support the substrate W. 
     Hereinafter, a substrate treating method according to an embodiment of the inventive concept will be described in more detail with reference to the drawings. 
       FIG.  11    to  FIG.  17    schematically illustrate a state in which a deposition process and an etching process are alternately performed on a plurality of substrates in the substrate treating apparatus of  FIG.  2   . 
       FIG.  11    to  FIG.  17    schematically illustrate a process in which one cycle process is performed on a substrate taken into each of a plurality of substrate treating spaces.  FIG.  11    illustrates a state the substrate is taken into each of the plurality of substrate treating spaces, FIG.  12  to  FIG.  13    illustrates a process of the substrate being transferred to an adjacent treating space after the substrate treatment process is performed in  FIG.  11   ,  FIG.  14    and  FIG.  15    illustrate a process in which the substrate is transferred to an adjacent treating space after the substrate treatment process is performed in  FIG.  13   , and  FIG.  16    and  FIG.  17    illustrate a process in which the substrate is transferred to an adjacent treating space after the substrate treatment process is performed in  FIG.  15   . The substrate on which the cycle process is completed is then taken out to the transport unit  240 . 
     Different processes may be performed in each of the first to fourth treating spaces  303  to  306 . Different processes having different process temperature conditions may be performed in each of the first to fourth treating spaces  303  to  306 . Different processes may be performed in any one of the first to fourth treating spaces  303  to  306  and the other one of the first to fourth treating spaces  303  to  306 . Different processes may be performed in neighboring spaces among the first to fourth treating spaces  303  to  306 . In an embodiment, a deposition process may be performed in the first treating space  303  and the third treating space  305 , and an etching process may be performed in the second treating space  304  and the fourth treating space  306 . In another embodiment, the etching process may be performed in the first treating space  303  and the third treating space  305 , and the deposition process may be performed in the second treating space  304  and the fourth treating space  306 . 
     Referring to  FIG.  11    to  FIG.  17   , the plurality of substrates W are taken into each of the first to fourth treating spaces  303  to  306 , and the plurality of substrates W introduced into each of the first to fourth treating spaces  303  to  306  are simultaneously treated. The etching process and the deposition process is alternately performed while the substrate W is sequentially moved in the plurality of treating spaces. In an embodiment, the first substrate W 1  taken into the first treating space  303  is transferred to the second treating space  304  by the transfer unit  500  after the deposition process is performed in the first treating space  303 , the first substrate W 1  is then transferred the third treating space  305  by the transfer unit  500  after the etching process is performed in the second treating space  304 , then the first substrate W 1  is transferred to the fourth treating space  306  by the transfer unit  500  after the deposition process is performed at the third treating space  305 . That is, the first substrate W 1  is sequentially transferred to the first to fourth treating spaces  303  to  306  while the deposition process and the etching process are repeated, and when the final process is completed, it is taken out to the transfer unit  240 . Similarly, the second substrate W 2  taken into the second treating space  304  is sequentially transferred to the second treating space  304 , the third treating space  305 , the fourth treating space  306 , and the first treating space  303  and treated in each space. The third substrate W 3  taken into the third treating space  305  is sequentially transferred to the third treating space  305 , the fourth treating space  306 , the first treating space  303 , and the second treating space  304  and treated in each space. The fourth substrate W 4  taken into the fourth treating space  306  is sequentially transferred to the fourth treating space  306 , the first treating space  303 , the second treating space  304 , and the third treating space  305 . A plurality of substrates W taken into the first to fourth treating spaces  303  to  306  may perform a plurality of circuit treatment processes in the first to fourth treating spaces  303  to  306  according to a process recipe. That is, the cycle process may be performed on the substrate W, and the cycle count may be set differently according to the treatment purpose. 
     The substrate W taken in each of the first to fourth treating spaces  303  to  306  may be simultaneously treated. If the substrate treatment process is simultaneously performed in the first to fourth treating spaces  303  to  306  at the same time, the separation unit  400  can be positioned at a contact position. If the substrate treatment process performed in the first to fourth treating spaces  303  to  306  is completed, the separation unit  400  may move to a separation position, and the transfer unit  500  may transfer the substrate W to an adjacent treating space. 
     As an example, four treating spaces are formed in the substrate treating apparatus  300  to simultaneously perform a substrate treatment process on four substrates. However, the plurality of treating spaces may be provided in various numbers according to conditions such as a process efficiency and a footprint. In an embodiment, the plurality of treating spaces may be provided as even spaces. In an embodiment, referring to  FIG.  16   , the substrate treating apparatus  300  may have a chamber having six treating spaces. 
     Meanwhile, the substrate treating apparatus and the substrate treating method according to the above-described embodiments may be controlled and performed by a controller (not shown). A configuration, storage, and management of the controller can be realized in the form of a hardware, a software, or a combination of the hardware and the software. The controller&#39;s file data and/or software can be optically or magnetically stored on a volatile or a nonvolatile storage device such as a Read Only Memory (ROM), or for example a memory such as a Random Access Memory (RAM), a memory chip, a device, or an integrated circuit, such as a compact disk (CD), a DVD (Digital Viable Disc), a magnetic disk or a magnetic tape. Also, it may be simultaneously stored in a machine (for example, a computer) which can read the stored data. 
     An embodiment of the inventive concept provides a substrate treating apparatus capable of simultaneously performing a deposition process and an etching process. A difficulty of the substrate treating apparatus which combines the deposition process and the etching process to form a pattern is that a temperature of each process is different in most cases, so the temperature must be changed every time a conversion is made between the deposition process and etching process. An embodiment of the inventive concept separates a treating space in which the deposition process is performed and the treating space in which the etching process is performed in the same chamber without a temperature change, and physically separates the treating space in which each process is performed. At the same time, the separation unit  400  can minimize a possibility of a contamination by a process by protecting the transfer unit  500  which moves the plate inside the chamber in a separated (closed) transfer region during the process. 
     In the embodiment of the inventive concept, a support unit performing each of a deposition process and an etching process exist in the same chamber, so there is no need to change the temperature, and each support unit and transfer unit can be physically separated during the processes to minimize contamination problems through a movable separation unit  400 . In addition, if the transfer unit transfers the substrate in the chamber, the separation unit  400  moves the substrate to the next support unit in a state at which the substrate can be moved between each support unit in the chamber. At this time, if the separation unit is lifted, a purge gas is supplied to the treating space through pipes or passages positioned inside the separation unit to prevent a gas and byproducts used for the deposition process and the etching process from entering and mixing with the nearby support unit. 
     The effect obtained through the configuration of the inventive concept is to prevent thermal shock of components due to temperature change and reduce process time because a stage in which deposition and etching are separated is not required. And since the entire chamber is isolated during the process, the process of opening and closing the chamber door for substrate transfer can be omitted, so that the inner environment of the chamber does not change during the process. Therefore, the optimal process condition may be maintained throughout the process. 
     The effects of the inventive concept are not limited to the above-mentioned effects, and the unmentioned effects can be clearly understood by those skilled in the art to which the inventive concept pertains from the specification and the accompanying drawings. 
     Although the preferred embodiment of the inventive concept has been illustrated and described until now, the inventive concept is not limited to the above-described specific embodiment, and it is noted that an ordinary person in the art, to which the inventive concept pertains, may be variously carry out the inventive concept without departing from the essence of the inventive concept claimed in the claims and the modifications should not be construed separately from the technical spirit or prospect of the inventive concept.