Patent Publication Number: US-8540854-B2

Title: Apparatus and method for plating substrate

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This U.S. non-provisional patent application claims priority under 35 U.S.C. § 119 of Korean Patent Application No. 10-2009-0011126, filed on Feb. 11, 2009, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND 
     The present disclosure herein relates to an apparatus and method for plating a substrate, and more particularly, to a substrate plating apparatus and method for performing a metal plating process on a semiconductor substrate. 
     Copper (Cu) having low electrical resistance and high electromigration resistance than those of aluminium (Al) or an Al alloy is used in recent years as a material for forming an interconnection circuit on a semiconductor substrate. Generally, Cu is filled into an interconnection pattern trench formed in a surface of the substrate to form a Cu interconnection. Various techniques for forming the Cu interconnection are known. For example, the techniques may include chemical vapor deposition (CVD), sputtering, plating, etc. However, the CVD process requires relatively high manufacturing costs when the Cu interconnection is formed. Also, according to the sputtering process, it is difficult to fill Cu or its alloy into the interconnection pattern trench in case where the interconnection pattern trench has a high aspect ratio. On the other hand, the plating process has improved efficiency because Cu or its alloy is deposited on the substrate to form the Cu interconnection. 
       FIG. 1A  is a schematic view of a typical substrate plating apparatus.  FIG. 1B  is an enlarged view illustrating a portion “a” of  FIG. 1A . As illustrated in  FIG. 1A , a typical substrate plating apparatus  10  includes a substrate support member  11  supporting a substrate W to allow a surface to be plated (hereinafter, referred to as a plating surface) of the substrate W to look down and a plating bath  15  disposed below the substrate support member  11  and including a positive electrode  12  and an ion exchange membrane  13 . The substrate W is supported by the substrate support member  11  to allow the plating surface to look down and is immersed into a plating solution. 
     According to the typical substrate plating apparatus  10 , since the substrate W transferred in a state in which the plating surface looks up should be reversed to allow the plating surface to look down in order that the substrate W is supported by the substrate support member  11 , a separate unit for reversing the substrate W is required. Also, as illustrated in  FIG. 1B , due to a chemical reaction during the plating process or the rotation of the substrate support member  11 , bubbles  27  may occur in the plating solution. Thus, the generated bubbles  27  rise up by buoyancy to stay on a contact hole  25  for interconnection or a trench  26 . If the bubbles  27  staying on the contact hole  25  for interconnection or the trench  26  are not removed, a defect pattern of the substrate W may occur during the plating process. 
     SUMMARY 
     The present disclosure provides a substrate plating apparatus in which a plating layer is uniformly deposited and a substrate plating method using the same. 
     The present disclosure also provides a substrate plating apparatus in which a plating process is performed without reversing a substrate during a substrate plating process and a substrate plating method using the same. 
     The present disclosure also provides a substrate plating apparatus having a simple structure. 
     The present disclosure also provides a substrate plating apparatus that prevents a plating defect occurring by bubbles and a substrate plating method using the same. 
     Embodiments of the inventive concept provide apparatuses for plating a substrate, the apparatuses including: a substrate support member; and a plating solution supply member disposed above the substrate support member, the plating solution supply member discharging a plating solution onto a plating surface of the substrate, wherein the substrate support member includes a support plate supporting the substrate to allow the plating surface to look up. 
     In some embodiments, the substrate support member may include an annular ring protruding annularly from a top surface of the support plate toward an upper side along an outer circumference of the support plate, the annular ring providing a space in which the substrate is disposed therein. The substrate support member may further include an injection nozzle passing through the support plate and injecting an inert gas onto a non-plated surface of the substrate. 
     In other embodiments, the support plate may have a vacuum suction hole vacuum-adsorbing a non-plated surface of the substrate to support the substrate. 
     In still other embodiments, the substrate support member may have a holes vertically passing through the support plate and may further include a support pin vertically movable along the respective holes and loading/unloading the substrate to/in the space. The apparatuses may further include a plating bath surrounding the substrate support member, the plating bath having an opened upper portion, wherein the plating path my have an upper end higher than a top surface of the annular ring. 
     In even other embodiments, the apparatuses may further include: a plating solution storage part storing the plating solution; a first supply line connecting the plating solution supply member to the plating solution storage part, the first supply line supplying the plating solution to the plating solution supply member; and a second supply line connecting the plating bath to the plating solution storage part, the second supply line the plating solution to the plating bath. 
     In yet other embodiments, the plating solution supply member may have a bottom surface having a diameter greater than an inner diameter of the annular ring. The plating solution supply member may include: a main body having an inner space with opened lower portion; a positive electrode disposed in the inner space, the positive electrode providing positive ions into the plating solution; and an ion exchange membrane disposed below the positive electrode, the ion exchange membrane being permeable only to the positive ions. The plating solution supply member may be disposed below the ion exchange membrane and may further include a porous plate in which a plurality of holes is defined. The plating solution supply member may further include an interception plate opening and closing the plurality of holes. 
     In further embodiments, the apparatuses may further include a first driving part vertically moving the substrate support member or the plating solution supply member, the first driving part varying a relative distance between the substrate support member and the plating solution supply member. 
     In still further embodiments, the substrate support member may further include a metal pin disposed on an outer circumference of the support plate, the metal pin protruding upwardly from a top surface of the support plate, wherein the metal pin may contact the plating surface and be electrically connected to the substrate. 
     In even further embodiments, the substrate support member may further include a metal pin disposed on the outer circumference of the support plate, the metal pin protruding upwardly from the top surface of the support plate, wherein the metal pin may contact the plating surface and be electrically connected to the substrate. The metal pin may be disposed on the annular ring. 
     In yet further embodiments, the substrate support member may further include a reinforcement member surrounding an outer surface of the metal pin, the reinforcement member reinforcing strength of the metal pin. The reinforcement member may include a support member including a support member protruding upwardly from the top surface of the support plate and an upper member extending from an end of the support member in a direction different from that of the support member, wherein a groove may be defined in a lateral surface of the support member in a longitudinal direction, and the groove may extend along a bottom surface of the upper member, wherein the metal pin may be inserted into the groove. 
     In yet much further, the apparatuses may further include a second driving part rotating the metal pin. The apparatuses may further include a third driving part lifting the meal pin from the top surface of the support plate toward an upper side. 
     In other embodiments of the inventive concept, methods for plating a substrate include: supporting the substrate on a substrate support member to allow a plating surface of the substrate to look up; and discharging a plating solution from a plating solution supply member disposed above the substrate support member onto the plating surface, wherein the plating solution contains positive ions dissolved from a positive electrode disposed in an inner space of the plating solution supply member. The supporting of the substrate may include injecting an inert gas onto a non-plated surface of the substrate to space the substrate from the substrate support member, thereby supporting the substrate. The discharging of the plating solution may include rotating the substrate support member while the plating solution is discharged. 
     In some embodiments, the supporting of the substrate may include rotating a metal pin disposed on an outer circumference of the substrate support member and protruding upwardly from a top surface of the substrate support member to contact the substrate. 
     In other embodiments, the methods may further include supplying the plating solution to a plating bath surrounding the substrate support member and having an opened upper portion to immerse the substrate support member while the plating solution is discharged onto the plating surface. 
     In still other embodiments, the discharging of the plating solution may include: intercepting a plurality of holes defined in a bottom surface of the plating solution supply member to fill the plating solution into the inner space; allowing the positive ions to pass through ion exchange membrane disposed below the positive electrode; and opening the plurality of holes. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of the inventive concept, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the inventive concept and, together with the description, serve to explain principles of the inventive concept. In the drawings: 
         FIG. 1A  is a schematic view of a typical substrate plating apparatus; 
         FIG. 1B  is an enlarged view illustrating a portion “a” of  FIG. 1A ; 
         FIG. 2A  is a schematic view of a substrate processing apparatus according to an embodiment of the inventive concept; 
         FIG. 2B  is an enlarged view illustrating a portion “a” of  FIG. 2A ; 
         FIG. 3  is a sectional view of a substrate processing apparatus according to another embodiment of the inventive concept; 
         FIGS. 4A and 4B  are perspective views of holes defined in a porous plate; 
         FIG. 5A  is a perspective view of a substrate support member according to the inventive concept; 
         FIG. 5B  is a perspective view of a metal pin according to the inventive concept; 
         FIG. 5C  is a perspective view of a metal pin and a reinforcement member according to the inventive concept; 
         FIG. 6  is a schematic plan view of a substrate processing system according to an embodiment of the inventive concept; and 
         FIGS. 7A to 7D  are views of a substrate processing method according to an embodiment of the inventive concept. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Exemplary embodiments of the inventive concept will be described below in more detail with reference to  FIGS. 2A to 7D . The inventive concept may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. In the drawings, the dimensions of layers and regions are exaggerated for clarity of illustration. 
       FIG. 2A  is a schematic view of a substrate processing apparatus according to an embodiment of the inventive concept. 
     Referring to  FIG. 2A , a substrate processing apparatus  100  includes a substrate support member  110 , a plating bath  120 , a bowl  130 , and a plating solution supply member  160 . 
     The substrate support member  110  supports a substrate W to allow a plating surface of the substrate W to look up. The plating bath  120  receives a plating solution and an additive to immerse the substrate support member  110 . The bowl  130  surrounds the plating bath  120  and recovers the plating solution overflowing from the plating bath  120 . The plating solution supply member  160  supplies the plating solution from an upper side of the substrate support member  110  to the plating surface of the substrate W. Hereinafter, each of the components will be described in detail. 
     The substrate support member  110  includes a support plate  111 , a support shaft  112 , an annular ring  114 , a support plate driver  116 , a metal pin  141 , a reinforcement member  142 , a support pin  191 , and a base  192 . 
     The support plate  111  has a circular plate shape. The support plate  111  has a top surface diameter greater than that of the substrate W and a bottom surface diameter less than the top surface diameter thereof. The support shaft  112  is coupled to a lower end of the support plate  111 . The support plate  111  is supported by the support shaft  112  and rotatable by rotation of the support shaft  112 . The support plate  111  supports the substrate W to allow the plating surface of the substrate W to look up. The substrate W transferred by a transfer unit (not shown) in a state in which the plating surface looks up is seated on the support pin  191  that stays at an upper side of the support plate  111 . Then, when the support pin  191  descends, the substrate W is supported by the support plate  111  to allow the plating surface to look up. A vacuum suction hole  115  passing through the support plate  111  is defined in the support plate  111 . The vacuum suction hole  115  vacuum-adsorbs a non-plated surface of the substrate W to support the substrate W. The vacuum suction hole  115  is connected to a suction member (not shown) for sucking air. A pump that can suck air may be used as the suction member. A plurality of holes vertically passing through the support plate is defined in the support plate  111 . According to this embodiment, the plurality of holes is defined between the vacuum suction hole  115  and the annular ring  114 . The plurality of holes serves as passages through which the support  191  ascends or descends. 
     The support shaft  112  has an inner space  113  and vertically opened cylindrical shape. The support shaft  112  is coupled to a lower end of the support plate  111 . The inner space  113  of the support shaft  112  communicates with the vacuum suction hole  115  to provide a passage through which the sucked air is exhausted to the outside through the vacuum suction hole  115 . The support plate driver  116  is disposed below the support shaft  112  to rotate the support plate  111  using a power supplied from an external power source. 
     The annular ring  114  has a ring shape annularly protruding from a top surface of the support plate  111  to an upper side along an outer circumference of the support plate  111 . The annular ring  114  provides a space in which the substrate W is disposed therein. The annular ring  114  allows the plating solution supplied from the plating solution supply member  160  to stay therein, thereby providing a space in which a plating layer is deposited. 
     The metal pin  141  is disposed on the outer circumference of the support plate  111  and protrudes upwardly from a top surface of the support plate  111 . According to this embodiment, the metal pin  141  may be disposed outside the annular ring  114  or on the annular ring  114 . The metal pin  141  is inserted into a groove (see reference numeral  145  of  FIG. 5C ) defined in the reinforcement member  142 . Specifically, the metal pin  141  is inserted into the groove (see reference numeral  145  of  FIG. 5C ) defined in a lateral surface of a support member (see reference numeral  142   a  of  FIG. 5C ) and a bottom surface of an upper member (see reference numeral  14   b  of  FIG. 5C ) in a longitudinal direction. The metal pin  141  is rotated by a second driving part  143  to contact the plating surface of the substrate W. The metal pin  141  may be electrically connected to the substrate W. The metal pin  141  includes a support rod (see reference numeral  141   a  of  FIG. 5B ) protruding upwardly from the top surface of the support plate  111  and a contact rod (see reference numeral  141   b  of  FIG. 5B ) inclined from an upper end of the support rod  141   a  and contacting the plating surface of the substrate W. The second driving part  143  rotates the metal pin  141 . Specifically, the second driving part  143  rotates the metal pin  141  with respect to a line passing through a center of a longitudinal direction of the support rod  141   a  as an axis. A third driving part  144  lifts the metal pin  141  upwardly from the top surface of the support plate  111 . The metal pin  141  may be provided in plurality. The plurality of metal pins  141  may be spaced apart from each other along the outer circumference of the support plate  111 . The metal pins  141  are disposed with a predetermined distance therebetween. 
     The reinforcement member  142  surrounds the metal pin  141  to reinforce strength of the metal pin  141 . The reinforcement member  142  includes the support member  142   a  protruding upwardly from the top surface of the support plate  111  and the upper member  142   b  extending from an end of the support member  142   a  in a direction different from that of the support member  142   a . The groove  145  is defined in an outer surface of the reinforcement member  142  in a longitudinal direction of the support member  142 a and the upper member  142   b . The metal pin  141  is inserted into the groove  145  defined in the outer surface of the reinforcement member  142 . Specifically, the support rod  141   a  is inserted into the groove  145  defined in the support member  142   a , and the contact rod  141   b  is inserted into the groove  145  defined in the upper member  142   b . The metal pin  141  inserted into the reinforcement member  142  has a surface exposed to the outside. 
     The plating bath  120  has an opened upper portion and surrounds the substrate support member  110 . An under surface of the plating bath  120  is spaced apart from a bottom surface of the support plate  111 . A sidewall of the plating bath  120  extends upwardly from an outer circumference end of the under surface thereof. According to this embodiment, an upper end of the sidewall of the plating bath  120  is higher than a top surface of the annular ring  114 . Since the plating bath  120  has the upper end higher than the top surface of the annular ring  114 , the substrate support member  110  is sufficiently immersed in the plating solution supplied into the plating bath  120 . A first inflow hole  122  is defined in the sidewall of the plating bath  120 . The first inflow hole  122  is connected to a first supply line  174  to provide a passage through which the plating solution stored in a plating solution storage part  173  is supplied into the plating bath  120  through the first supply line  174 . 
     The bowl  130  surrounds the plating bath  120 . The bowl  130  recovers the plating solution overflowing from the plating bath  120  and the plating solution dispersed by the rotation of the substrate support member  110 . A drain  131  is defined in a bottom surface of the bowl  130 . The drain  131  provides a passage through which the plating solution recovered within the bowl  130  is moved into a plating solution recovery tank  133  through a plating solution recovery line  132 . 
     The support pin  191  is disposed in each of holes vertically passing through the support plate  111 . The support pin  191  may be vertically movable along the hole. Also, the support pin  191  loads/unloads the substrate W to the space of the annular ring  114 . The base  192  is disposed below the support plate  111  and coupled to a lower end of the support pin  191 . A fourth driving part  193  vertically moves and rotates the base  192 . 
     The plating solution supply member  160  is disposed above the substrate support member  110  to supply the plating solution to the plating surface of the substrate W. An under surface of the plating solution supply member  160  has a diameter greater than an inner diameter of the annular ring  114 . The plating solution supply member  160  may be rotated by a first driving part  167 . 
     The plating solution supply member  160  includes a main body  161 , a positive electrode  162 , an ion exchange membrane  163 , a porous plate  164 , and an interception plate  171 . The main body  161  has a cylindrical shape and an opened lower portion. Also, the main body  161  has a space therein. The main body  161  has a diameter greater than the inner diameter of the annular ring  114 . The positive electrode  162  is disposed in the inner space of the main body  161 . The positive electrode  162  has a circular plate shape, and an outer surface thereof contacts an inner sidewall of the main body  161 . The positive electrode  162  is electrically connected to the metal pin  141  through electric wires  182  and  183 . A power source  181  is disposed on the electric wires  182  and  183 . A first electric wire  182  connects the metal pin  141  to a negative pole of the power source  181 , and a second electric wire  183  connects the positive electrode  162  to a positive pole of the power source  181 . The ion exchange membrane  163  is disposed between the positive electrode  162  and the porous plate  164  within the inner space of the main body  161 . The ion exchange membrane  163  is coupled to the inner sidewall of the main body  161  along a circumference direction of the main body  161 . The ion exchange membrane  163  is permeable only to positive ions. According to this embodiment, a Cu plate is used as the positive electrode  162 , and a copper sulfate solution (CuSO 4 ) is used as the plating solution. When a predetermined voltage is applied to the positive electrode  162 , positive ions such as Cu 2+  is melted into the plating solution from the positive electrode  162 . The Cu 2+  positive ions emitted from the positive electrode  162  pass through the ion exchange membrane  163 . However, SO 4   2−  negative ions remaining in the plating solution does not pass through the ion exchange membrane  163 . A second inflow hole  166  is defined in the sidewall of the main body  161 . The second inflow hole  166  is connected to a second supply line  175  and provides a passage through which the plating solution stored in the plating solution storage part  173  is supplied into the main body  161  through the second supply line  175 . Specifically, the second inflow hole  166  is defined between the positive electrode  162  and the ion exchange membrane  163 . 
     The porous plate  164  has a circular plate shape and is disposed below the ion exchange membrane  163 . Also, an outer circumference of the porous plate  164  is coupled to a lower end of the main body  161 . A plurality of holes  165  is uniformly defined in the porous plate  174 . The porous plate  164  interrupts an opened lower portion of the main body to store a certain amount of the plating solution within the inner space of the main body  161 . The plating solution staying within the inner space of the main body  161  is uniformly supplied to an entire region of the plating surface through the holes  165  defined in the porous plate  164 . The plurality of holes  165  is opened or closed by the interception plate  171 . The interception plate  171  opens or closes the holes  165  by an interception plate driving part  172 . 
       FIGS. 4A and 4B  are perspective views of holes  165  defined in a porous plate  164 . Referring to  FIG. 4A , the respective holes  165  have a circular shape. Also, the holes  165  are uniformly defined in the porous plate  164 . Referring to  FIG. 4B , the respective holes  165  have a slit shape. Also, the holes  165  are spaced a predetermined distance from each other in a direction parallel to a diameter direction of the porous plate  164 . A configuration of the respective holes  165  is not limited to the configuration described above, and is modified variously. 
       FIG. 2B  is an enlarged view illustrating a portion “a” of  FIG. 2A . 
     Referring to  FIG. 2B , the substrate W is supported by the top surface of the support plate  111  to allow the plating surface to look up. According to this embodiment, a dielectric  23  formed of SiO 2  is deposited on a conductive layer  22  disposed on a semiconductor base  21 . A contact hole  25  for interconnection and a trench  26  are defined within the dielectric  23  using a lithography/etching technique, and a seed layer  24  that is an electricity supply layer is disposed. To plate Cu on a surface of the seed layer  24 , the plating solution is supplied to a top surface of the plating surface. While the plating process is performed, bubbles are generated on the plating solution due to due to a chemical reaction and the rotation of the immersed substrate support member  110 . Like a typical technology, when the plating surface of the substrate is supported to look down (see  FIG. 1B ), the bubbles generated at a lower portion of the substrate W rise up by buoyancy. As a result, the bubbles are introduced into the contact hole  25  and trench  26  of the plating surface and stay therein. However, as described according to the inventive concept, when the plating surface of the substrate W is supported to look up, the generated bubbles  27  are released into air without introducing into the contact hole  25  and the trench  26  of the plating surface due to the buoyancy. Thus, since the bubbles  27  generated during the plating process do not stay on the plating surface, pattern defect of the substrate W due to the bubbles  27  may be prevented. 
       FIG. 3  is a sectional view of a substrate processing apparatus according to another embodiment of the inventive concept. 
     Referring to  FIG. 3 , a substrate processing apparatus  100  include a substrate support member  110 , a plating bath  120 , a bowl  130 , and a plating solution supply member  160 . Since the plating bath  120 , the bowl  130 , and the plating solution supply member  160  are the same constitution as those of  FIG. 2A , their detailed descriptions will be omitted. 
     The substrate support member  110  includes a support plate  111 , a support shaft  112 , an annular ring  114 , an injection nozzle  118 , a metal pin  141 , a reinforcement member  142 , a support pin  191 , and a base  192 . 
     The support plate  111  has a circular plate shape. The support plate  111  has a top surface diameter greater than that of a supported substrate W and a bottom surface diameter less than the top surface diameter thereof. 
     The support shaft  112  is coupled to a lower end of the support plate  111 . The support plate  111  is supported by the support shaft  112  and rotatable by rotation of the support shaft  112 . The support plate  111  supports the substrate W to allow the plating surface of the substrate W to look up. The substrate W transferred by a transfer unit (not shown) in a state in which the plating surface looks up is seated on the support pin  191  that stays at an upper side of the support plate  111 . Then, when the support pin  191  descends, the substrate W is supported by the support plate  111  to allow the plating surface to look up. The injection nozzle  118  passing through the support plate  111  is disposed in the support plate  111 . The injection nozzle  118  supplies an inert gas to a non-plated surface of the substrate W. A plurality of holes vertically passing through the support plate is defined in the support plate  111 . According to this embodiment, the plurality of holes is defined between the injection nozzle  118  and the annular ring  114 . The plurality of holes serves as passages through which the support  191  ascends or descends. 
     The support shaft  112  has an inner passage  113  and vertically opened cylindrical shape. The support shaft  112  is coupled to a lower end of the support plate  111 . The inner passage  113  of the support shaft  112  communicates with a gas supply line  126  and receives the inert gas from a gas storage part  117 . 
     The annular ring  114  has a ring shape annularly protruding from a top surface of the support plate  111  to an upper side along an outer circumference of the support plate  111 . The annular ring  114  provides a space in which the substrate W is disposed therein. The annular ring  114  allows the plating solution supplied from the plating solution supply member  160  to stay therein, thereby providing a space in which a plating layer is deposited. 
     The injection nozzle  118  passes through the top surface and a bottom surface of the support plate  111 . The injection nozzle  118  is connected to the inner passage  113  of the support shaft  112  to inject the inert gas onto the non-plated surface of the substrate W. As the inert gas is injected, the substrate W is spaced apart from the top surface of the support plate  111 . While the inert gas is injected onto the non-plated surface, since the metal pin  141  and the reinforcement member  142  support the planting surface, the substrate may be firmly supported. 
     Since the metal pin  141 , the reinforcement member  142 , the support pin  191 , and the base  192  have the same constitution as those of  FIG. 2A , their detailed descriptions will be omitted. 
       FIG. 5A  is a perspective view of a substrate support member according to the inventive concept.  FIG. 5B  is a perspective view of a metal pin according to the inventive concept.  FIG. 5C  is a perspective view of a metal pin and a reinforcement member according to the inventive concept. 
     Referring to  FIG. 5A , a support plate  111  has a circular plate shape. An annular ring  114  is disposed on a top surface of the support plate  111 . The annular ring  114  annularly protrudes from the top surface of the support plate  111  toward an upper side along an outer circumference of the support plate  111 . A substrate W is disposed inside the annular ring  114  to allow a plating surface to look up. Also, the substrate W is supported by the support plate  111 . A reinforcement member  142  is disposed at an upper end of the annular ring  114 . The reinforcement member  142  may be provided in plurality. The plurality of reinforcement member  142  is spaced a predetermined distance from each other. The reinforcement member  142  protrudes upwardly from the upper end of the annular ring  114 . An upper end of the reinforcement member  142  extends in a direction parallel to that of the top surface of the support plate  111 . According to another embodiment, the reinforcement member  142  is disposed outside the annular ring  114 . 
     Referring to  FIG. 5B , the metal pin  141  includes an upwardly protruding support rod  141   a  and a contact rod  141   b  extending from an upper end of the support rod  141   a  to in a direction different from that of the support rod  141   a . The metal pin  141  may be rotatable by a rotation of a driving part and ascend upwardly from an upper end of the annular ring  142 . 
     Referring to  FIG. 5C , the reinforcement member  142  includes a support member  142   a  protruding upwardly from the top surface of the support plate  111  and the upper member  142   b  extending from an end of the support member  142   a  in a direction different from that of the support member  142   a . The groove  145  is longitudinally defined in a lateral surface of the reinforcement member  142 . The groove  145  extends along a bottom surface of the upper member  142   b . The metal pin  141  is inserted into the groove  145  defined in the outer surface of the reinforcement member  142 . Specifically, the support rod  141   a  is inserted into the groove  145  defined in the support member  142   a , and the contact rod  141   b  is inserted into the groove  145  defined in the upper member  142   b . A surface of the metal pin  141  that does not contact the reinforcement member  142  is exposed to the outside. 
       FIG. 6  is a schematic plan view of a substrate processing system according to an embodiment of the inventive concept. 
     Referring to  FIG. 6 , a substrate processing system  200  includes an equipment front end module  30  and a process equipment  40 . 
     The equipment front end module  30  is disposed at a front side of the process equipment  40  to transfer a substrate W between a carrier  210  in which the substrates W are received and the process equipment  40 . The equipment front end module  30  includes a load/unload part  210  and a first transfer unit  220 . 
     The load/unload part  210  is disposed at a front side of the first transfer unit  220  in a first direction. The load/unload part  210  includes a plurality of support parts  211  and a plurality of carriers  212 . The support parts  211  are arranged in a line in a second direction perpendicular to the first direction. The carrier  212  receiving the substrate W to be processed land the completely processed substrate W) is seated on the support parts  211 . The first transfer unit  220  is disposed between the load/unload part  210  and the process equipment  40 . The first transfer unit  220  includes a first transfer robot  221 . The first transfer robot  221  transfers the substrate W between the carrier  212  and the process equipment  40  along a transfer rail  222  disposed in the second direction. 
     The process equipment  40  includes a buffer part  230 , a second transfer unit  230 , a substrate plating chamber  240 , and a substrate cleaning chamber  260 . The buffer part  230  is disposed at a front side of the process equipment  40  in the first direction. The buffer part  230  provides a space in which the substrate W to be processed and the completely processed substrate W stay before they are not transferred. The second transfer unit  240  is disposed at a rear side of the buffer part  230 . The second transfer unit  240  includes a second transfer robot  241  moved along a transfer rail  242  disposed within the process equipment  40  in the first direction. The plurality of substrate cleaning chambers  260  and substrate plating chambers  250  are disposed at both sides of the transfer rail  242  in the first direction. The substrate cleaning chambers  260  and the substrate plating chambers  250  are disposed in the second direction to face each other with the transfer rail  242  therebetween. A plating layer is formed on the plating surface of the substrate W in the substrate plating chamber  250 . The completely plated substrate W is cleaned and dried in the substrate cleaning chamber  260 . A series of processes for processing the substrate W in the substrate processing system  200  is as follows: The substrate W received in the carrier  212  is transferred to the buffer part  230  by the first transfer robot  221 . The second transfer robot  241  loads the substrate W to allow the plating surface of the substrate W received in the buffer part  230  to look up. Then, the second transfer robot  241  transfers the substrate W into the substrate plating chamber  250  to seat the substrate W in a state the plating surface looks up. As described above, the second transfer robot  241  transfers the substrate W to the substrate plating chamber  250  in the state where the plating surface of the substrate W looks up. Then, the second transfer robot  241  seats the substrate W on the substrate support member  110  without reversing the substrate W. When the plating process is completely performed, the second transfer robot  241  loads the substrate W on the substrate support member  110  to transfer the substrate W into the substrate cleaning chamber  260 . When the cleaning and drying processes of the substrate W are completely performed in the substrate cleaning chamber  260 , the second transfer robot  241  transfers the substrate W to the buffer part  230 . The first transfer robot  221  loads the substrate W to the buffer part  230  and receives the loaded substrate W into the carrier  212 . 
       FIGS. 7A to 7D  are views of a substrate processing method according to an embodiment of the inventive concept. 
     Referring to  FIG. 7A , according to a substrate processing method, a plating solution A is supplied into an inner space of a plating solution supply member  160 . The plating solution A stored in a plating solution storage part (not shown) is supplied into the inner space of the plating solution supply member  160  through a second supply line (not shown) and a second inflow hole  166 . Specifically, the plating solution A is supplied into a space between a positive electrode  162  and an ion exchange membrane  163 . When a predetermined voltage is applied to the positive electrode  162  by a power source  181 , positive ions such as Cu 2+  are emitted from the positive electrode  162  into the plating solution A. The Cu 2+  positive ions emitted from the positive electrode  162  pass through the ion exchange membrane  163 . However, SO 4   2−  negative ions remaining in the plating solution A does not pass through the ion exchange membrane  163 . A metal pin  141  is rotated by an operation of a second driving part  143  to allow a contact rod  141   a  to face the outside of a support plate  111 . Also, the metal pin  141  ascends upwardly from a top surface of the support plate  111  by an operation of a third driving part  144 . An upper end of a support pin  191  is disposed above the support plate  111  due to ascent of a base  192 . 
     Referring to  FIG. 7B , a second transfer unit (see reference numeral  241  of  FIG. 6 ) transfers a substrate W into a substrate plating chamber  250  in a state where the plating surface looks up to seat the substrate W on the support pin  191 . The support pin  192  descends in a state where it supports the substrate W. Then, the substrate W is supported by the support plate  111 . When the substrate W is supported by the support plate  111 , the metal pin  141  is rotated and descends to allow a contact rod  141   a  to contact the plating surface of the substrate W. According to this embodiment, an inert gas is injected onto a non-plated surface of the substrate W to space the substrate W from a top surface of the support plate  111 . Since the plating surface is supported by the metal pin  141  and the reinforcement member  142  and the inert gas is injected onto the non-plated surface, the substrate W may be firmly supported to prevent the plating solution from being introduced onto the non-plated surface. 
     Referring to  FIG. 7C , according to the substrate processing method, the plating solution A is discharged from the plating solution supply member  160  disposed above the substrate support member  110  onto the plating surface. While the plating solution is discharged onto the plating surface, the substrate support member  110  is rotated. When a certain amount of the plating solution A is supplied into an inner space of the plating solution supply member  160 , the plating solution supply member  160  discharge the plating solution A onto the plating surface. In case where the plating solution A is discharged after it temporarily stays within the inner space of the plating solution supply member  160 , the Cu 2+  positive ions are sufficiently dissolved from the positive electrode  162  during the staying time of the plating solution A to uniformly supply the plating solution A on an entire surface of the substrate W. As a result, a plating layer is uniformly formed on the entire surface of the substrate W. On the other hand, in case where the supplied plating solution A is directly discharged onto the substrate W without staying within the inner space, the plating solution A is not simultaneously supplied onto the entire surface of the substrate W. Also, since the Cu 2+  positive ions are not sufficiently supplied from the positive electrode  162 , the plating layer is not uniformly formed on the entire surface of the substrate W. 
     When the plating solution A is fully filled into the inner space of the plating solution supply member  160 , the plating solution supply member  160  descends or the substrate support member  110  ascends to reduce a distance between the plating solution supply part  160  and the substrate support member  110 . When the plating solution supply member  160  is close to the substrate support member  110 , a plurality of holes  165  formed in a porous plate  164  is opened to discharge the plating solution A onto the plating surface. Since the plating solution A is discharged through the plurality of uniformly arranged holes  165 , the plating solution A may be uniformly provided onto the entire surface of the substrate W. The discharged plating solution A is maintained by an annular ring  114  and overflows at an upper end of the annular ring  114 . The plating solution A maintained by the annular ring  114  contains a large amount of the Cu 2+  positive ions, the plating layer may be uniformly deposited. 
     The discharged plating solution A contains the Cu 2+  positive ions dissolved from a Cu plate  162  and passing through the ion exchange membrane  163 . While the plating solution is discharged onto the plating surface of the substrate W, the substrate support member  110  is rotated. The discharged plating solution A is uniformly supplied onto the entire surface of the substrate W by the rotation of the substrate support member  110 . The Cu 2+  positive ions form a Cu plating layer on the plating surface of the substrate W. When the plating solution A is discharged onto the plating surface of the substrate W, the plating solution A and an additive B are supplied into a plating bath  120 . The substrate support member  110  is immersed into the plating solution A and the additive B and then rotated. At this time, since the substrate W is immersed within the plating solution, the discharged plating solution is not directly supplied to the substrate W, but is mixed with the plating solution immersing the substrate W and indirectly supplied to the plating surface. Thus, stress applied to a pattern of the substrate W may be reduced. Also, since the Cu 2+  positive ions are diffused into the plating solution immersing the substrate W and thus uniformly supplied to the entire surface of the substrate W, the plating layer may be uniformly deposited. 
     The plating solution A is supplied into the plating bath  120  from the plating solution storage part  173  through a first supply line  174  and a first inflow hole  122 . The supplied plating solution A overflows from the plating bath  120 . Also, the plating solution A is dispersed by the rotation of the substrate support member  110 . The overflowing and dispersed plating solution is recovered into a bowl  130 . The additive B may include a sulfurous compound, a polymer, and a nitrogen compound. Here, the sulfurous compound grows crystal nucleus over the entire plated surface to promote accumulation of finer particles. The polymer increases an overvoltage at the Cu accumulation to increase electrodeposition. The nitrogen compound adheres to a protrusion having a thicker plating thickness to increase overvoltage at a protrusion and interrupt the Cu accumulation, thereby planarizing the plated layer. 
     Referring to  FIG. 7D , when the substrate plating process is completely performed, the plating solution A is not supplied to the plating solution supply member  160  and the substrate support member  110 . Also the holes  165  of the porous plate  164  are intercepted. The plating solution supply member  160  ascends or the substrate support member  110  descends, resulting in a relatively large distance between the plating solution supply member  160  and the substrate support member  110 . Thereafter, a cleaning part  311  including a cleaning nozzle  312  is disposed above the substrate W to inject a cleaning solution onto the substrate W in which the plating process is completely performed, thereby cleaning the plated surface. 
     According to the inventive concept, the plating layer can be uniformly deposited on the plating surface of the substrate. 
     Also, since the plating surface of the substrate is supported to look up, the plating process can be performed without reversing the substrate. 
     Also, since a unit for reversing the substrate is not required, the substrate plating apparatus can have a simple structure. 
     Also, since the bubbles generated during the plating process does not stay within the pattern, the plating defect due to the bubbles can be prevented. 
     The above-disclosed subject matter is to be considered illustrative and not restrictive, and the appended claims are intended to cover all such modifications, enhancements, and other embodiments, which fall within the true spirit and scope of the inventive concept. Thus, to the maximum extent allowed by law, the scope of the inventive concept is 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 detailed description.