Patent Abstract:
Disclosed is a substrate treating apparatus. The substrate treating apparatus includes a housing defining a space for treating a substrate therein, a spin head supporting and rotating the substrate in the housing, a spray unit including a first nozzle member for spraying a first treating solution on the substrate placed on the spin head, and a controller controlling the spray unit. The controller sprays the first treating solution while moving the first nozzle member between edge and center regions of the substrate and above the substrate. The controller differently adjusts a first height at which the first treating solution is sprayed on the edge region of the substrate and a second height at which the first treating solution is sprayed on the center region of the substrate.

Full Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    A claim for priority under 35 U.S.C. §119 is made to Korean Patent Application No. 10-2014-0145403 filed Oct. 24, 2014, in the Korean Intellectual Property Office, the entire contents of which are hereby incorporated by reference. 
       BACKGROUND 
       [0002]    Embodiments of the inventive concepts described herein relate to a substrate treating apparatus and a substrate cleaning method using the same. 
         [0003]    Various processes such as photolithography, etching, ashing, ion implantation, and film deposition are performed on a substrate so as to manufacture a semiconductor device or a liquid crystal display. A substrate cleaning process for removing various contamination materials and particles attached to a substrate surface may be performed before and after each unit process for fabricating a semiconductor device. 
         [0004]    Various methods such as spraying a chemical, a treating solution including a gas, or a treating solution with a vibration may be used as a cleaning process to remove various contamination materials and particles remaining on the substrate surface. 
       SUMMARY 
       [0005]    Embodiments of the inventive concepts provide a substrate treating apparatus capable of improving cleaning efficiency. 
         [0006]    Embodiments of the inventive concepts provide a substrate treating apparatus. 
         [0007]    One aspect of embodiments of the inventive concept is directed to provide a substrate treating apparatus. The substrate treating apparatus includes a housing defining a space for treating a substrate therein, a spin head supporting and rotating the substrate in the housing, a spray unit including a first nozzle member for spraying a first treating solution on the substrate placed on the spin head, and a controller controlling the spray unit, wherein the controller sprays the first treating solution while moving the first nozzle member between edge and center regions of the substrate and above the substrate, and wherein the controller differently adjusts a first height at which the first treating solution is sprayed on the edge region of the substrate and a second height at which the first treating solution is sprayed on the center region of the substrate. 
         [0008]    The second height may be higher than the first height. 
         [0009]    The controller may control the first nozzle member such that a height of the first nozzle member is progressively increased as the first nozzle member moves from the edge region of the substrate to the center region thereof. 
         [0010]    The controller may control the first nozzle member such that a height of the first nozzle member is continuously increased as the first nozzle member moves from the edge region of the substrate to the center region thereof. 
         [0011]    The first nozzle member may include a body including an injection flow path and a first discharge hole therein, the first treating solution flowing through the injection flow path and the first discharge hole connected with the injection flow path and spraying the first treating solution on the substrate, and a vibrator installed in the body and providing a vibration to the first treating solution flowing into the injection flow path. 
         [0012]    The first nozzle member may include a body including an injection flow path and first micro-holes therein, the first treating solution flowing through the injection flow path and the first micro-holes connected with the injection flow path and spraying the first treating solution on the substrate. 
         [0013]    The first nozzle member may include a body including an injection flow path and a first discharge hole therein, the first treating solution flowing through the injection flow path and the first discharge hole connected with the injection flow path and spraying the first treating solution on the substrate, and a gas supply unit installed in the body and spraying a gas together with the first treating solution sprayed through the first discharge hole. 
         [0014]    The injection flow path may include a first region and a second region each having a ring shape when viewed from the top, and a radius of the first region is greater than that of the second region. 
         [0015]    When viewed from the top, the first discharge holes of the first region may be provided in a line along the first region, and the first discharge holes of the second region are provided in two lines along the second region. 
         [0016]    The inventive concept, however, may be embodied in various different forms, and should not be construed as being limited only to the illustrated embodiments. Embodiments of the inventive concept are provided to illustrate more fully the scope of the inventive concept to those skilled in the art. 
     
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         [0017]    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: 
           [0018]      FIG. 1  is a top plan view schematically illustrating a substrate treating apparatus; 
           [0019]      FIG. 2  is a cross-sectional view illustrating a substrate treating apparatus of  FIG. 1 ; 
           [0020]      FIG. 3  is a cross-sectional view illustrating a first nozzle member of  FIG. 2 ; 
           [0021]      FIG. 4  is a bottom view illustrating a first nozzle member of  FIG. 3 ; 
           [0022]      FIG. 5  is a diagram illustrating a conventional substrate cleaning method; 
           [0023]      FIG. 6  is a diagram illustrating a region where a first treating solution is supplied when the first treating solution is sprayed using a substrate cleaning method of  FIG. 5 ; 
           [0024]      FIG. 7  is a diagram illustrating a substrate cleaning method for supplying a first treating solution on a substrate using a first nozzle member according to an embodiment of the inventive concept; 
           [0025]      FIG. 8  is a diagram illustrating a substrate cleaning method for supplying a first treating solution on a substrate using a first nozzle member according to another embodiment of the inventive concept; 
           [0026]      FIG. 9  is a diagram illustrating a surface velocity at which a first treating solution reaches a substrate, varied according to a spray height of the first nozzle member; 
           [0027]      FIG. 10  is a diagram illustrating a first nozzle member according to other embodiment of the inventive concept; and 
           [0028]      FIG. 11  is a diagram illustrating a first nozzle member according to another embodiment of the inventive concept. 
       
    
    
     DETAILED DESCRIPTION 
       [0029]    Embodiments will be described in detail with reference to the accompanying drawings. The inventive concept, however, may be embodied in various different forms, and should not be construed as being limited only to the illustrated embodiments. Embodiments of the inventive concept are provided to illustrate more fully the scope of the inventive concept to those skilled in the art. Therefore, the shapes of the components in the drawings may be exaggerated to emphasize a more clear description. 
         [0030]    Below, an example of the inventive concept will be described with reference to  FIGS. 1 to 11 . 
         [0031]      FIG. 1  is a top plan view schematically illustrating a substrate treating apparatus according to an embodiment of the inventive concept. Referring to  FIG. 1 , a substrate treating apparatus  1  may have an index module  10  and a process treating module  20 . The index module  100  may contain a load port  120  and a transfer frame  140 . The load port  120 , the transfer frame  140 , and the process treating module  20  may be arranged in a line. Below, a direction where the load port  120 , the transfer frame  140 , and the process treating module  20  are arranged may be referred to as “first direction”  12 . When viewed from the top, a direction perpendicular to the first direction  12  may be referred to as “second direction”  14 , and a direction perpendicular to a plane defined by the first direction  12  and the second direction  14  may be referred to as “third direction”  16 . 
         [0032]    A carrier  130  where a substrate W is received may be safely put on the load port  120 . The load port  120  may be in plurality, and the plurality of load ports  120  may be arranged in a line along the second direction  14 . The number of load ports  120  may increase or decrease according to conditions such as process efficiency, footprint, and the like in the process treating module  20 . A plurality of slots (not illustrated) may be formed in the carrier  130  so as to receive the substrates W in a state where they are placed in a horizontal position on the ground surface. A Front Opening Unified Pod (FOUP) may be used as the carrier  130 . 
         [0033]    The process treating module  20  may contain a buffer unit  220 , a transfer chamber  240 , and process chambers  260 . The transfer chamber  240  may be arranged such that its length direction is parallel with the first direction  12 . The process chambers  260  may be arranged at opposite sides of the transfer chamber  240  along the second direction  14 . The process chambers  260  may be arranged at one side and the other side of the transfer chamber  240  so as to be arranged symmetrically with respect to the transfer chamber  240 . The plurality of process chambers  260  may be provided at one side of the transfer chamber  240 . A portion of the process chambers  260  may be arranged along a length direction of the transfer chamber  240 . Furthermore, a portion of the process chambers  260  may be arranged to be stacked. That is, the process chambers  260  may be arranged in an A-by-B matrix at the one side of the transfer chamber  240 . In this case, “A” may indicate the number of process chambers  260  arranged in a line along the first direction  12 , and “B” may indicate the number of process chambers  260  arranged in line along the third direction  16 . When four or six process chambers  260  are arranged at the one side of the transfer chamber  240 , the process chambers  260  may be arranged in a 2-by-2 or 3-by-2 matrix. The number of process chambers  260  may increase or decrease. Unlikely, the process chambers  260  may be provided at any one side of the transfer chamber  240 . In addition, the process chambers  260  may be arranged at one side and opposite sides of the transfer chamber  240  to form a single layer. 
         [0034]    The buffer unit  220  may be disposed between the transfer frame  140  and the transfer chamber  240 . The buffer unit  220  may provide a space where a substrate W stays before transferred between the transfer chamber  240  and the transfer frame  140 . A slot(s) (not illustrated) where a substrate W is placed may be provided in the buffer unit  220 . A plurality of slots may be provided to be spaced apart from each other along the third direction  16 . The buffer unit  220  may have an opened surface that faces the transfer frame  140  and an opened surface that faces the transfer chamber  240 . 
         [0035]    The transfer frame  140  may transfer a wafer W between the buffer unit  220  and the carrier  130  safely put on the load port  120 . An index rail  142  and an index robot  144  may be provided at the transfer frame  140 . The index rail  142  may be provided such that its length direction is parallel with the second direction  14 . The index robot  144  may be mounted on the index rail  142  and may move in a straight line toward the second direction  14  along the index rail  142 . The index robot  144  may contain a base  144   a,  a body  144   b,  and an index arm  144   c.  The base  144   a  may be installed to be movable along the index rail  142 . The body  144   b  may be joined to the base  144   a.  The body  144   b  may be provided to be movable on the base  144   a  along the third direction  16 . Furthermore, the body  144   b  may be provided to be rotatable on the base  144   a.  The index arm  144   c  may be joined to the body  144   b  such that it is forward and backward movable with respect to the body  144   b.  The index arm  144   c  may be in plurality, and the plurality of index arms  144   c  may be driven independently of each other. The index arms  144   c  may be arranged to be stacked on each other under the condition that index arms  144   c  are spaced apart from each other along the third direction  16 . A portion of the index arms  144   c  may be used to transfer a substrate W from the process treating module  20  to the carrier  130 , and a portion of remaining index arms  144   c  may be used to transfer the substrate W from the process treating module  20  to the carrier  130 , thereby preventing particles, generated from a substrate W not experiencing process treating when the substrate W is carried into or taken out of by the index robot  144 , from being attached to the substrate W. 
         [0036]    The transfer chamber  240  may transfer a substrate W between the buffer unit  220  and the process chamber  260  and between the process chambers  260 . A guide rail  242  and a main robot  244  may be provided at the transfer chamber  240 . The guide rail  242  may be arranged such that its length direction is parallel with the first direction  12 . The main robot  244  may be installed on the guide rail  242  and may move in a straight line along the first direction  12  on the guide rail  242 . The main robot  244  may contain a base  244   a,  a body  244   b,  and a main arm  244   c.  The base  244   a  may be installed to be movable along the guide rail  242 . The body  244   b  may be joined to the base  244   a.  The body  244   b  may be provided to be movable on the base  244   a  along the third direction  16 . Furthermore, the body  244   b  may be provided to be rotatable on the base  244   a.  The main arm  244   c  may be joined to the body  244   b  such that it is forward and backward movable with respect to the body  144   b.  The main arm  244   c  may be in plurality, and the plurality of main arms  244   c  may be driven independently of each other. The main arms  244   c  may be arranged to be stacked on each other in a state where the main arms  244   c  are spaced apart from each other along the third direction  16 . 
         [0037]    A substrate treating apparatus  300  performing a cleaning process for cleaning a substrate W may be provided in the process chamber  260 . The substrate treating apparatus  300  may have different structures according to types of cleaning processes. In contrast, the substrate treating apparatuses  300  of the process chambers  260  may have the same structure. Selectively, the process chambers  260  may be divided into a plurality of groups. The substrate treating apparatuses  300  in the same groups may have the same structure, and the substrate treating apparatuses  300  in different groups may have different structures. 
         [0038]      FIG. 2  is a cross-sectional view illustrating a substrate treating apparatus of  FIG. 1 . Referring to  FIG. 2 , the substrate treating apparatus  300  may include a housing  320 , a spin head  340 , an elevation unit  360 , a spray unit  380 , and a controller  500 . The housing  320  may contain a space where the substrate treating process is performed and an upper end portion of the housing  320  may be opened. The housing  320  may contain an internal collection barrel  322  and an external collection barrel  326 . The internal and external collection barrels  322  and  326  may collect different treating solutions among treating solutions used in a process, respectively. The internal collection barrel  322  may be provided in the form of a ring surrounding the spin head  340 , and the external collection barrel  326  may be provided in the form of a ring surrounding the internal collection barrel  322 . An internal space  322   a  of the internal collection barrel  322  and a space  326   a  between the internal collection barrel  322  and the external collection barrel  326  may serve as inlets that allow the treating solutions to flow into the internal collection barrel  322  and the external collection barrel  326 , respectively. Collection lines  322   b  and  326   b  which extend vertically and downwardly toward the bottom may be connected to the respective collection barrels  322  and  326 . The collection lines  322   b  and  326   b  may discharge treating solutions collected by the collection barrels  322  and  326 . The discharged treating solutions may be recycled through an external treating solution recycling system (not illustrated). 
         [0039]    The spin head  340  may support and rotate a substrate W during a process. The spin head  340  may include a body  342 , a support pin  344 , a chuck pin  346 , and a support shaft  348 . The body  342  may have an upper surface provided in the form of a circle when viewed from the top. The support shaft  348  rotated by a motor  349  may be fixedly mounted on a lower surface of the body  342 . 
         [0040]    The support pin  344  may be provided in plurality. The support pins  344  may be disposed to be spaced apart by a predetermined gap from an edge of the upper surface of the body  342  and may protrude upwardly from the body  342 . The support pins  344  may be disposed to have the form of a ring as a whole through a combination thereof. The support pins  344  may support an edge of a rear surface of the substrate W to allow the substrate W to be spaced apart by a predetermined distance from the upper surface of the body  342 . 
         [0041]    The chunk pin  346  may be provided in plurality. The chuck pins  346  may be disposed such that it is further away from the center of the body  342  than the support pin  344 . The chuck pin  346  may be provided to protrude upwardly from the body  342 . The chuck pin  346  may support a side portion of the substrate W to prevent the substrate W from deviating from a given position to a lateral direction when the spin head  340  rotates. The chuck pin  346  may be provided to move in a straight line between a waiting position and a support position along a radius direction of the body  342 . The waiting position may be a position such that it is further away from the center of the body  342  than the support pin  344 . When the substrate W is loaded on or unloaded from the body  342 , the chuck pin  346  may be placed at the waiting position; when a substrate treating process is performed, the chuck pin  346  may be placed at the support position. The chuck pin  346  may be contacted with a side portion of the substrate W at the support position. 
         [0042]    The elevation unit  360  may upwardly or downwardly move the housing  320  in a straight line. A height relative to the spin head  340  may be changed as the housing  320  moves upwardly or downwardly. The elevation unit  360  may include a bracket  362 , a moving shaft  364 , and a driver  366 . The bracket  362  may be fixedly installed on an outer wall of the housing  320  and the moving shaft  364  which moves upwardly or downwardly by the driver  366  may be fixedly jointed with the bracket  362 . When the substrate W is loaded on or lifted from the spin head  340 , the housing  320  may descend such that the spin head  340  protrudes upwardly from an upper portion of the housing  320 . Furthermore, when the process is performed, a height of the housing  320  may be adjusted such that the treating solution flows into a predetermined collection barrel  360  depending on a type of the treating solution supplied to the substrate W. Selectively, the elevation unit  360  may move the spin head  340  upwardly or downwardly. 
         [0043]    The spray unit  380  may spray the treating solution on the substrate W. The spray unit  380  may be provided in plurality to spray various kinds of treating solutions or to spray the same kind of treating solutions in various ways. The spray unit  380  may include a support shaft  386 , a nozzle arm  382 , a first nozzle member  400 , a cleaning member, and a second nozzle member  480 . The support shaft  386  may be disposed at one side of the housing  320 . The support shaft  386  may have a rod form where its length direction is a vertical direction. The support shaft  386  may be rotated, ascended and descended by a driver member  388 . In contrast, the support shaft  386  may be moved and ascended and descended in a straight line along a horizontal direction by the driver member  388 . The nozzle arm  382  may be fixedly jointed at a top end of the support shaft  386 . The nozzle arm  382  may support a first nozzle member  400  and a second nozzle member  480 . The first nozzle member  400  and the second nozzle member  480  may be disposed at an end portion of the nozzle arm  382 . For example, the second nozzle member  480  may be located closer to the end portion relative to the first nozzle member  400 . A cleaning member may clean the first nozzle member  400 . The cleaning member may be provided at one side in the housing  320 . When a first treating solution is discharged on the substrate through the first nozzle member  400 , the controller  500  may place the first nozzle member  400  at a discharging position above the substrate. In contrast, when the discharging of the first treating solution is completed, the controller  500  may place the first nozzle member  400  at a cleaning position in a liquid bath. 
         [0044]      FIG. 3  is a cross-sectional view illustrating a first nozzle member  400  according to an embodiment of the inventive concept.  FIG. 4  is a bottom view illustrating the first nozzle member  400  of  FIG. 3 . The first nozzle member  400  may spray the first treating solution in a spray manner. When viewed from the top, the first nozzle member  400  may be provided in the form of a ring. Referring to  FIGS. 3 and 4 , the first nozzle member  400  may spray the first treating solution in an inkjet manner. The first nozzle member  400  may include a body  410  and  430 , a vibrator  436 , a treating solution supply line  450 , and a treating solution collection line  460 . The body  410  and  430  may contain a lower plate  410  and an upper plate  430 . The lower plate  410  may have a cylinder form. An injection flow path  412  through which the first treating solution flows may be formed in the lower plate  410 . A plurality of first discharge holes  414  may be formed at a lower surface of the lower plate  410  to spray the first treating solution, and each of the first discharge holes  414  may be connected with the injection flow path  412 . The first discharge holes  414  may be microscopic holes. The injection flow path  412  may include a first region  412   b,  a second region  412   c,  and a third region  412   a.  When viewed from the top, the first region  412   b  and the second region  412   c  may be provided in the form of a ring. In this case, a radius of the first region  412   b  may be greater than that of the second region  412   c.  The first discharge holes  414  of the first region  412   b  may be provided in a line along the first region  412   b.  The first discharge holes  414  of the second region  412   c  may be provided in tow lines along the second region  412   c.  The third region  412   a  may connect the first region  412   b  and the second region  412   c  to an inflow path  432 . The third region  412   a  may connect the first region  412   b  and the second region  412   c  to a collection flow path  434 . For example, as illustrated in  FIG. 4 , the third region  412   a  may connect the inflow path  432  or the collection flow path  434  to the third region  412   a.  The upper plate  430  may be provided in the form of a cylinder having the same diameter as the lower plate  410 . The upper plate  430  may be fixedly jointed on a top surface of the lower plate  410 . The inflow path  432  and the collection flow path  434  may be formed at an inside of the upper plate  430 . The inflow path  432  and the collection flow path  434  may be provided to pass through the second region  412   b  of the injection flow path  412 . The inflow path  432  may function as an inlet into which the first treating solution flows, and the collection flow path  434  may function as an outlet through which the first treating solution is collected from the injection flow path  412 . The inflow path  432  and the collection flow path  434  may be disposed to face each other with the first nozzle member  400  as the center 
         [0045]    The vibrator  436  may be placed in the upper plate  430 . When viewed from the top, the vibrator  436  may be provided to have a ring shape. For example, the vibrator  436  may be provided to have the same diameter as the first region  412   b . Selectively, the diameter of the vibrator  436  may be greater than that of the first region  412   b  and may be smaller than that of the upper plate  430 . The vibrator  436  may be electrically connected to a power  438  placed at an outside. The vibrator  436  may provide a vibration to the first treating solution to be sprayed and may adjust a particle size and a flow velocity of the first treating solution. For example, the first treating solution may be electrolytic ionized water. The first treating solution may include any one of hydrogen water, oxygen water, and ozone water or all thereof. Selectively, the first treating solution may be pure water. 
         [0046]    A treating solution supply line  450  may provide the first treating solution to the inflow path  432 , and a treating solution collection line  460  may collect the first treating solution from the collection flow path  434 . The treating solution supply line  450  may be connected to the inflow path  432  and the treating solution collection line  460  may be connected to the collection flow path  434 . A pump  452  and a supply valve  454  may be installed on the treating solution supply line  450 . A collection valve  462  may be installed on the treating solution collection line  460 . The pump  452  may pressurize the first treating solution supplied from the treating solution supply line  450  into the inflow path  432 . The supply valve  454  may open and close the treating solution supply line  450 . According to an example, the collection valve  462  may open the treating collection line  460  before a process, and thus, the first treating solution may collect the first treating solution via the treating solution collection line  460  and may not be injected via a first injection hole  414 . In contrast, the collection valve  462  may close the treating collection line  460  during a process. In this case, since the first treating solution may be filled in the injection flow path  412 , an internal pressure of the injection flow path  412  may be increased. When a voltage is applied to the vibrator  436 , the first treating solution may be injected via first injection hole  414 . 
         [0047]    Referring again to  FIG. 2 , the second nozzle member  480  may provide a second treating solution on the substrate. The second nozzle member  480  may supply the second treating solution simultaneously when the first nozzle member  400  supplies the first treating solution. In this case, the second nozzle member  480  may supply the second treating solution ahead before the first nozzle member  400  starts supplying the first treating solution. For example, the second nozzle member  480  may inject the second treating solution in a dropping manner. The second nozzle member  480  may be provided to surround a part of the first nozzle member  400 . The second nozzle member  480  may be more adjacent to one end of the nozzle arm  382  than the first nozzle member  400 . The second nozzle member  480  may have a second discharge hole vertically discharging the second treating solution on the substrate. When viewed from the top, the second nozzle member  480  may be provided in the form of an arc surrounding the first nozzle member  400 . A straight-line distance from one end of the second nozzle member  480  to the other end thereof may be greater than a diameter of the first nozzle member  400 . In this case, the first nozzle member  400  and the second nozzle member  480  may have the same center. The second treating solution may be provided as a protective liquid. For example, the second treating solution may be a solution including ammonia and hydrogen peroxide. The second treating solution may form a liquid film on the substrate W and the liquid film may relax influence of the treating solution on the substrate W. Accordingly, it may be possible to prevent a pattern on the substrate W from falling due to the second treating solution. The second treating solution may be pure water. The second discharge hole may be provided in the form of a single slit. Selectively, the second discharge hole may include in a plurality of circular discharge holes. The second nozzle member  480  may spray the second treating solution into a region adjacent to a region in which the first treating solution is sprayed on the substrate W. A region where the second treating solution sprayed may be closer to a center region of the substrate W than that where the first treating solution is sprayed. Selectively, the second nozzle member  480  may be provided in a bar shape, not an arc shape. 
         [0048]    The controller  500  may control the spray unit  380 . For example, the controller  500  may control spray position, spray point in time, and spray amount of the spray unit  380 . For example, the controller  500  may control spray position, spray point in time, and spray amount of the first treating solution of the first nozzle member  400 . 
         [0049]      FIG. 5  is a diagram illustrating a conventional substrate cleaning method.  FIG. 6  is a diagram illustrating a region where a first treating solution is supplied when the first treating solution is sprayed using the substrate cleaning method of  FIG. 5 . Referring to  FIGS. 5 and 6 , the conventional substrate treating apparatus may supply the first treating solution while the first nozzle member  400  reciprocates from an edge region of the substrate to the center region thereof. In this case, the first nozzle member  400  may move under the condition that a spray height at which the first treating solution is applied over a substrate using the first nozzle member  400  is maintained constantly. In this case, due to the same angular velocity, sizes of areas where the first treating solutions are supplied on the substrate during the same time may be different from each other. That is, when a treating solution is sprayed during the same time, a spray region E 2  at the edge region of the substrate may be greater in size than a spray region E 1  at the center of the substrate. For this reason, the amount of droplets colliding with the center of the substrate W per unit area may be greater than that colliding with the edge region thereof, and thus, the center region of the substrate W may be damaged. 
         [0050]      FIG. 7  is a diagram illustrating a substrate cleaning method for supplying the first treating solution on a substrate using the first nozzle member  400  according to an embodiment of the inventive concept.  FIG. 8  is a diagram illustrating a substrate cleaning method for supplying the first treating solution on a substrate using the first nozzle member  400  according to another embodiment of the inventive concept.  FIG. 9  is a diagram illustrating a surface velocity Vs at which the first treating solution reaches the substrate W, varied according to a spray height of the first nozzle member  400 . Below, a substrate treating method will be described with reference to  FIGS. 7 to 9 . The controller  500  may spray the first treating solution while the first nozzle member  400  moves above the substrate W and between the edge region and the center region of the substrate. In this case, the controller  500  may differently adjust a first height h 1  where the first nozzle member  400  sprays the first treating solution at the edge region of the substrate W and a second height h 2  where the first nozzle member  400  sprays the first treating solution at the center of the substrate W. In this case, the second height h 2  may be higher than the first height h 1 . The surface velocity Vs at which the first treating solution reaches the substrate W may be variable according to a discharge height at which the first nozzle member  400  discharges the first treating solution. That is, as the height of the first nozzle member  400  becomes higher, the velocity of droplets discharged may become slower due to air resistance, thereby reducing influence of the droplet on the substrate W. For example, a surface velocity Vs at which the first nozzle member  400  discharges a treating solution at a height of 10 mm may become slower by about 2.4 m/s than a surface velocity Vs at which the first nozzle member  400  discharges a treating solution at a height of 5 mm. Accordingly, since impact on the center region on the substrate W is reduced as much as about 12%, it may be possible to prevent the center region of the substrate W from being damaged. The controller  500  may adjust a height of the first nozzle member  400  such that a height of the first nozzle member  400  is continuously increased as the first nozzle member  400  moves from the edge region of the substrate W to the center region thereof. For example, the controller  500  may linearly increase the height of the first nozzle member  400 . Selectively, The controller  500  may adjust a height of the first nozzle member  400  such that a height of the first nozzle member  400  is progressively increased as the first nozzle member  400  moves from the edge region of the substrate W to the center region thereof. For example, the controller  500  may stepwise increase the height of the first nozzle member  400 . 
         [0051]      FIG. 10  is a diagram illustrating a first nozzle member  400   a  according to another embodiment of the inventive concept.  FIG. 11  is a diagram illustrating a first nozzle member  400   b  according to another embodiment of the inventive concept. As illustrated in  FIG. 10 , the first nozzle member  400   a  may have micro-holes  430   a  in the body  410   a.  The first nozzle member  400   a  may pressurize the first treating solution sprayed via the micro-holes  430   a  to spray the first treating solution with mist. Furthermore, selectively, as illustrated in  FIG. 11 , the first nozzle member  400   b  may further include a gas supply unit  430   b  at a body  410   b.  The gas supply unit  430   b  may be provided to be inclined downwardly toward a first discharge hole  420   b  spraying the first treating solution. Accordingly, gas and the first treating solution may be sprayed respectively through the gas supply unit  430   b  and the first discharge hole  420   b  and may supply the first treating solution in a spray manner. In contrast, selectively, the first nozzle member may have another type of spray manner. Furthermore, selectively, the first nozzle member may supply the first treating solution in any other manners, not the spray manner. 
         [0052]    The substrate treating apparatus described above may be used for various processes as well as the substrate cleaning process. For example, the substrate treating apparatus may be used for a substrate etching process. In addition, the substrate treating apparatus may include a rinse liquid member. 
         [0053]    According to an exemplary embodiment of the inventive concept, it may be possible to improve cleaning efficiency. 
         [0054]    The inventive concept, however, may be embodied in various different forms, and should not be construed as being limited only to the illustrated embodiments. Embodiments of the inventive concept are provided to illustrate more fully the scope of the inventive concept to those skilled in the art. 
         [0055]    While the inventive concepts have been described with reference to example embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirits and scopes of the inventive concepts. Therefore, it should be understood that the above embodiments are not limiting, but illustrative. Thus, the scopes of the inventive concepts are to be determined by the broadest permissible interpretation of the following claims and their equivalents, and shall not be restricted or limited by the foregoing description.

Technology Classification (CPC): 7