Abstract:
A substrate peeling apparatus includes a support member and absorption pads. The support member, having a quadrangular shape, includes first and second vertexes diagonally facing each other in a first direction, and third and fourth vertexes diagonally facing each other in a second direction crossing the first direction. The absorption pads is disposed on the support member. The absorption pads are arranged in rows in a direction parallel to the first direction and at least one absorption pad of each row is arranged in a direction parallel to the second direction. An absorption pad of each row includes a hole having an increasing internal diameter as a distance in the first direction between the each row and the first vertex increases. An internal diameter of an absorption pad in a row positioned halfway between the first and second vertexes has a maximum internal diameter.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims priority under 35 U.S.C. §119 to Korean Patent Application No. 10-2014-0012720, filed on Feb. 4, 2014 in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. 
       TECHNICAL FIELD 
       [0002]    The present invention relates to a substrate peeling apparatus and a method of peeling a substrate using the same. 
       DISCUSSION OF RELATED ART 
       [0003]    Relatively thin substrates (hereinafter, referred to as thin substrates) are used for thin and lightweight display devices. Thin substrates are processed to form pixels or other displaying elements thereon, while attached to support substrates. The support substrates allows the thin substrates to be processed without being bent or cracked in the process. After completion of the process to form the pixels or other displaying elements, the support substrate is removed from the substrate. 
       SUMMARY 
       [0004]    According to an exemplary embodiment of the present invention, a substrate peeling apparatus includes a support member and absorption pads. The support member, having a quadrangular shape, includes first and second vertexes diagonally facing each other in a first direction, and third and fourth vertexes diagonally facing each other in a second direction crossing the first direction. The absorption pads is disposed on the support member. The absorption pads are arranged in rows in a direction parallel to the first direction and at least one absorption pad of each row is arranged in a direction parallel to the second direction. An absorption pad of each row in the absorption pads includes a hole having an increasing internal diameter as a distance in the first direction between the each row and the first vertex increases. If a row is positioned halfway in the first direction between the first and second vertexes, the internal diameter of an absorption pad in the row has a maximum internal diameter. 
         [0005]    According to an exemplary embodiment of the present invention, a substrate peeling method is provided. A combined structure of a substrate and a support substrate is prepared, The substrate is attached to the support substrate. The substrate is partially separated from the support substrate at a predetermined area in a first corner of the combined structure. An increasing pulling-up force is sequentially applied to the combined structure along a first direction from the first corner of the combined structure to a center of the combined structure to separate the substrate from the support substrate. The separation starts from the predetermined area of the substrate. A decreasing pulling-up force is sequentially applied to the combined structure along the first direction from the center of the combined structure to a second corner of the combined structure to completely separate the substrate from the support substrate. The second corner of the combined structure is diagonally opposite to the first corner. The first and second corners and the center of the combined structure is aligned in the first direction. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]    These and other features of the present invention will become more apparent by describing for example exemplary embodiments thereof with reference to the accompanying drawings of which: 
           [0007]      FIG. 1  is a perspective view of a substrate peeling apparatus according to an exemplary embodiment of the present invention; 
           [0008]      FIG. 2  is a side view showing the substrate peeling apparatus of  FIG. 1 ; 
           [0009]      FIGS. 3 ,  4 A, and  4 B are enlarged views showing one absorption pad of absorption pads of  FIG. 2 ; 
           [0010]      FIG. 5  is a view showing an arrangement of absorption pads of  FIG. 2 ; 
           [0011]      FIGS. 6 and 7  are views showing various arrangements of absorption pads of a substrate peeling member according to an exemplary embodiment of the present invention; 
           [0012]      FIG. 8  is a perspective view showing a substrate peeling apparatus according to an exemplary embodiment of the present invention; 
           [0013]      FIGS. 9A ,  9 B,  10 A, and  10 B are views showing a drive of absorption pads; 
           [0014]      FIGS. 11A to 11H  are views showing a method of peeling a substrate using the substrate peeling apparatus of  FIG. 1 ; and 
           [0015]      FIGS. 12A and 12B  are views explaining a method of peeling a substrate using the substrate peeling apparatus of  FIG. 8 . 
       
    
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       [0016]    Exemplary embodiments of the present invention will be described below for example with reference to the accompanying drawings. However, the present invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, the thickness of layers and regions may be exaggerated for clarity. It will also be understood that when an element is referred to as being “on” another element or substrate, it may be directly on the other element or substrate, or intervening layers may also be present. It will also be understood that when an element is referred to as being “coupled to” or “connected to” another element, it may be directly coupled to or connected to the other element, or intervening elements may also be present. Like reference numerals may refer to the like elements throughout the specification and drawings. 
         [0017]    Hereinafter, the present invention will be explained for example with reference to the accompanying drawings. 
         [0018]      FIG. 1  is a perspective view showing a substrate peeling apparatus according to an exemplary embodiment of the present invention and  FIG. 2  is a side view showing the substrate peeling apparatus of  FIG. 1 . 
         [0019]    Referring to  FIGS. 1 and 2 , a display panel  100  is disposed under the substrate peeling apparatus  50  and support substrates  210  and  220  are disposed on upper and lower surfaces of the display panel  100 , respectively. The support substrates  210  and  220  may be referred to as stages  210  and  220 . 
         [0020]    The display panel  100  includes two substrates  110  and  120  disposed to face each other and a liquid crystal layer LC disposed between the two substrates  110  and  120 . The substrates  110  and  120  include a first substrate  110  and a second substrate  120 . The first substrate  110  may be, but is not limited to, a thin film transistor substrate  110 , and the second substrate  120  may be, but is not limited to, a color filter substrate  120 . The first substrate  110  and the second substrate  120  are coupled to each other by a sealant SLT. 
         [0021]    The support substrates  210  and  220  include a first support substrate  210  and a second support substrate  220 . When the display device is manufactured, the first substrate  110  is placed on and attached to the first support substrate  210  and the second substrate  120  is placed on and attached to the second support substrate  210 . 
         [0022]    Each of the first and second substrates  110  and  120  may be a thin substrate. The first and second substrates  110  and  120  are supported by the first and second support substrates  210  and  220  in the process of manufacturing the display device. When the display device is manufactured, pixels is formed on the first substrate  110  attached to the first support substrate  210 . For instance, thin film transistors and pixel electrodes connected to the thin film transistors of the pixels are formed on the first substrate  110 . Color filters corresponding to the pixels and a common electrode facing the pixel electrodes are formed on the second substrate  120  attached to the second support substrate  220 . 
         [0023]    Then, the liquid crystal layer LC is formed between the first and second substrates  110  and  120 , and the first and second substrates  110  and  120  are coupled to each other by the sealant SLT. 
         [0024]    After the display panel  100  is manufactured, the first substrate  110  is peeled away from the first support substrate  210  by the substrate peeling apparatus  50  and the second substrate  120  is peeled away from the second support substrate  220  by the substrate peeling apparatus  50 . Although not shown in the drawings, additional substrate peeling apparatus may be disposed under the second support substrate  220  to peel away the second substrate  120  from the second support substrate  220 . 
         [0025]    The method of peeling the first and second substrates  110  and  120  from the first and second support substrates  210  and  220  using the substrate peeling apparatus  50  will be described for example later. 
         [0026]    The substrate peeling apparatus  50  includes a support member  10 , absorption pads  20 , a driver  30 , and a knife  40 . 
         [0027]    The first and second substrates  110  and  120  and the first and second support substrates  210  and  220  may have a quadrangular shape. In addition, the support member  10  may have a quadrangular shape corresponding to that of the first and second support substrates  210  and  220 . For example, the first and second substrates  110  and  120  and the first and second support substrates  210  and  220  have a rectangular shape and the support member  10  has a rectangular shape corresponding to that of the first and second support substrates  210  and  220 . 
         [0028]    The absorption pads  20  are disposed on a lower surface of the support member  10 . The driver  30  is disposed on an upper surface of the support member  10  at the center of the support member  10 . The support member  10  is aligned to overlap with the first and second support substrates  210  and  220 . 
         [0029]    Hereinafter, an imaginary line connected between first apexes AX 1  facing each other among four apexes AX 1  and AX 2  of the support member  10  may be referred to as a first extension line EL 1 . An imaginary line connected between second apexes AX 2  facing each other and different from the first apexes AX 1  among four apexes AX 1  and AX 2  of the support member  10  may be referred to as a second extension line EL 2 . Hereinafter apex may be interchangeably used with vertex or corner. 
         [0030]    A direction in which the first extension line EL 1  extends may be referred to as a first direction D1 and a direction in which the second extension line EL 2  extends may be referred to as a second direction D2. Therefore, the first direction D1 crosses the second direction D2. 
         [0031]    The absorption pads  20  have various sizes. The sizes of the absorption pads  20  become larger as a distance from the second extension line EL 2  decreases. In addition, a distance between the absorption pads  20  becomes larger as the distance from the second extension line EL 2  decreases. Detailed descriptions on the size and arrangement of the absorption pads  20  will be described for example later with reference to  FIGS. 5 to 7 . 
         [0032]    The absorption pads  20  have a cylindrical shape, but the present invention is not limited thereto. For instance, the absorption pads  20  may have a polygonal shape. The absorption pads  20  are attached to the first support substrate  210  or the second support substrate  220  by using a vacuum absorption force. The absorption pads  20  may be connected to a vacuum pump (not shown) to generate the vacuum absorption force. 
         [0033]    Each of the absorption pads  20  includes an absorption part  21 , a buffer part  22  and a connection part  23 . The buffer part  22  is connected to an upper portion of the absorption part  21 , and the connection part  23  is disposed on the buffer part  22  to connect the buffer part  22  to the support member  10 . The absorption part  21  and the buffer part  22  may be formed of a rubber material. 
         [0034]    The absorption part  21  is attached to the first support substrate  210  or the second support substrate  220  using a vacuum absorption force. The buffer part  22  has a predetermined buffer force acting in an up and down direction. 
         [0035]    The driver  30  moves up and down to transfer the support member  10  along the up and down direction. Thus, the absorption pads  20  connected to the lower portion of the support member  10  may move up and down by the driver  30 . The absorption pads  20  transferred by the driver  30  are attached to the first support substrate  210  or the second support substrate  220  by a vacuum absorption force. 
         [0036]    Hereinafter, the process of attaching the absorption pads  20  to the first support substrate  210  will be described. 
         [0037]    The knife  40  is arranged to cut a predetermined region of the first and second substrate  110  and  120  while the first and second substrate  110  and  120  is attached to the absorption part  21  using a vacuum absorption force. For instance, the knife is adjacent in the first direction D1 to one end of the first substrate  110  and the first support substrate  210  or one end of the second substrate  120  and the second support substrate  220 . 
         [0038]    The one end of the first substrate  110  and the first support substrate  210  or one end of the second substrate  120  and the second support substrate  220  corresponds to the first apex AX 1  in the first direction D1. For the convenience of description, the knife  40  is adjacent in the first direction D1 to the one end of the first substrate  110  and the first support substrate  210  as shown in  FIG. 2 . 
         [0039]    The knife  40  is inserted into between the first substrate  110  and the first support substrate  210  at the one end of the first substrate  110  and the first support substrate  210 , and thus a predetermined area of the one end of the first substrate  110  is peeled. Then the absorption pads  20  are attached to the first support substrate  210 . 
         [0040]    The absorption pads  20  are sequentially driven from the first apex AX 1  corresponding to the peeled area of the first substrate  110  along the first direction D1, so that the first substrate  110  is separated from the first support substrate  210 . The substrate peeling method will be described for example later with reference to  FIGS. 11A to 11H  and  12 A and  12 B. 
         [0041]      FIGS. 3 ,  4 A, and  4 B are enlarged views showing one absorption pad of the absorption pads shown in  FIG. 2 . 
         [0042]    The upper portion of the absorption part  21  has a diameter smaller than that of a lower portion of the absorption part  21 . The buffer part  22  has a bellows shape when viewed in a direction substantially perpendicular to a longitudinal direction of the buffer part, and thus the buffer part  22  includes protrusions P, each having a triangular shape, which are defined on an outer surface of the buffer part  22 . Due to the shape, the buffer part  22  has the buffering force in the up and down direction. 
         [0043]    In addition, the buffering force may occur such that a left side portion of the buffer part  22  is contracted in the up and down direction and a right side portion of the buffer part  22  is expanded in the up and down direction as shown in  FIG. 4A , and thus the absorption part  21  may be inclined to the left side portion. 
         [0044]    Further, the buffering force may occur such that the left side portion of the buffer part  22  is expanded in the up and down direction and the right side portion of the buffer part  22  is contracted in the up and down direction as shown in  FIG. 4B , and thus the absorption part  21  is inclined to the right side portion. 
         [0045]      FIG. 5  is a view showing an arrangement of the absorption pads shown in  FIG. 2 . 
         [0046]    For the convenience of description,  FIG. 5  shows a bottom view of the substrate peeling apparatus  50  when viewed at a lower side of the support member shown in  FIG. 1 . 
         [0047]    Referring to  FIG. 5 , third extension lines EL 3  is disposed between the second extension line EL 2  and the first apexes AX 1 . The third extension lines EL 3  extend substantially in parallel to the second direction D2. For example, the third extension lines EL 3  extend substantially in parallel to the second extension line EL 2 . Each of the third extension lines EL 3  extends to connect sides of the support member  10  to each other, which share the first apexes A 1 . 
         [0048]    An inner diameter ID of the absorption pad  20  shown in  FIG. 5  corresponds to an inner diameter of the lower portion of the absorption part  21 . In addition, an outer diameter EL 3  of the absorption pad  20  shown in  FIG. 5  corresponds to an outer diameter of the lower portion of the absorption part  21 . The vacuum absorption force occurs through a predetermined path of the absorption pad  20 , which has the inner diameter ID. 
         [0049]    The absorption pads  20  are arranged on the second extension line EL 2  and the third extension lines EL 3 . The absorption pads  20  disposed on the second extension line EL 2  have the same size. In addition, the absorption pads  20  disposed on the same third lines EL 3  have the same size. 
         [0050]    The size of the absorption pads  20  is determined by the inner diameter ID of each absorption pad  20 . Accordingly, the absorption pads  20  disposed on the second extension lire EL 2  have the same inner diameter ID and the absorption pads  20  disposed on the same third extension line EL 3  have the same inner diameter ID. 
         [0051]    The size of the absorption pads  20  disposed on the second extension line EL 2  is different from that of the absorption pads  20  disposed on the third extension lines EL 3 . In addition, the absorption pads  20  disposed on different third extension lines EL 3  have different sizes. 
         [0052]    For instance, the size of the absorption pads  20  disposed on the third extension lines EL 3  becomes larger as the absorption pads  20  are closer to the second extension line EL 2  along the first direction D1. The absorption pads  20  disposed on the second extension line EL 2  have the largest size among the absorption pads  20  disposed on the support member  10 . For example, the size of the absorption pads  20  disposed on the second extension line EL 2  is greater than that of the absorption pads  20  disposed on the third extension lines EL 3 . 
         [0053]    Therefore, the inner diameter ID of the absorption pads  20  becomes larger as the distance from the second extension line EL 2  decreases, and the absorption pads  20  disposed on the second extension line EL 2  have the largest inner diameter ID. 
         [0054]    The absorption pads  20  disposed on the second extension line EL 2  are arranged along the second extension line EL 2  at a regular interval, and the absorption pads  30  disposed on each third extension line EL 3  are arranged along a corresponding third extension line EL 3  of the third extension lines EL 3  at a regular interval. 
         [0055]    When a distance in the first direction D1 between the absorption pads  20  disposed on the third extension lines EL 3  adjacent to each other and a distance in the first direction D1 between the absorption pads  20  disposed on the second extension line EL 2  and the absorption pads  20  disposed on the third extension line EL 3  adjacent to the second extension line EL 2  are referred to as a first distance I1, the first distance I1 becomes larger as it goes to closer to the second extension line EL 2 . For example, the distance in the first direction D1 between the absorption pads  20  disposed on the second extension line EL 2  and the third extension lines EL 3  becomes larger as the distance from the second extension line EL 2  decreases. 
         [0056]    The vacuum absorption force of the absorption pads  20  is proportional to the inner diameter ID of the absorption pads  20 . 
         [0057]    If the absorption pads having the same inner diameter are uniformly arranged in a matrix form, an excessive absorption force may be applied to the area adjacent to the apex of the first support substrate  210 . In this case, the first substrate  110  may be damaged due to such excessive absorption three while being peeled away from the first support substrate  210 . 
         [0058]    The inner diameter ID of the absorption pads  20  in the first direction D1, according to an exemplary embodiment, becomes larger as the distance from the second extension line EL 2  decreases, and the absorption pads  20  disposed on the second extension line EL 2  have the largest inner diameter ID. A contact area between the first substrate  110  and the first support substrate  210  becomes larger as a distance between the second extension line EL 2  and the first apexes AX 1  decreases. 
         [0059]    Therefore, the absorption pads  20 , which have various sizes such that the absorption force proportional to the contact area between the first substrate  110  and the first support substrate  210  occurs, are attached to the first support substrate  210 . As a result, the first substrate  110  may be prevented from being damaged while the first substrate  110  is peeled away from the first support substrate  210 . 
         [0060]    The substrate peeling apparatus  50  according to an exemplary embodiment may precisely and accurately peel the first and second substrates  110  and  120  and prevent the first and second substrates  110  and  120  from being damaged. 
         [0061]      FIGS. 6 and 7  are views showing various arrangements of absorption pads of a substrate peeling member according to an exemplary embodiment of the present invention. 
         [0062]    The absorption pads shown in  FIGS. 6 and 7  have the same size as that of the absorption pads  20  shown in  FIG. 5 . The absorption pads  20  disposed on the second extension line EL 2  in  FIGS. 6 and 7  are arranged along the second extension line EL 2  at a regular interval, and the absorption pads  20  disposed on each third extension line EL 3  are arranged along a corresponding third extension line EL 3  of the third extension lines EL 3  at a regular interval substantially similar to the regular interval of the absorption pads  20  disposed on the second extension line EL 2 . 
         [0063]    For example, a distance I2 is constant. The distance I2 is measured in the first direction D1 between the absorption pads  20  disposed on the third extension lines EL 3  adjacent to each other. The distance I2 is also measured between the absorption pads  20  disposed on the second extension line EL 2  and the absorption pads  20  disposed on the third extension line EL 3  adjacent to the second extension line EL 2 . 
         [0064]    Referring to  FIG. 7 , some of the third extension lines EL 3  adjacent to the first apexes AX 1  may be referred to as first-third extension lines EL 3 - 1 , and the third extension lines EL 3  disposed between the first-third extension lines EL 3 - 1  and the second extension line EL 2  may be referred to as second-third extension lines EL 3 - 2 . 
         [0065]    A distance between the absorption pads  20  disposed on the first-third extension lines EL 3 - 1  adjacent to each other in the first direction D1 may be referred to as a first distance I1. 
         [0066]    A distance between the absorption pads  20  disposed on the first third extension line EL 3 - 1  and the second-third extension line EL 3 - 2  adjacent to the first-third extension line EL 3 - 1  in the first direction D1 may be referred to as a second distance I2. 
         [0067]    A distance between the absorption pads  20  disposed on the second-third extension lines EL 3 - 2  adjacent to each other in the first direction D1 may be referred to as the second distance I2. 
         [0068]    A distance between the absorption pads  20  disposed on the second extension line EL 2  and the absorption pads  20  disposed on the second-third extension line EL 3 - 2  adjacent to the second extension line EL 2  in the first direction D1 may be referred to as the second distance I2. 
         [0069]    The first distance I1 becomes larger as the absorption pads  20  disposed on the first-third extension line EL 3 - 1  are distant from the first apex AX 1 . The second distance I2 is constant. The second distance I2 is larger than the first distance I1. Thus, the distance between two adjacent extension lines EL 3 - 1  increases as the extension lines FL 3 - 1  is distant away from the first apex AX 1 , and the distance between two adjacent extension lines ELS 3 - 2  is constant. The distance between the second extension line EL 2  and the third extension line EL 3  adjacent to the second extension line EL 2  is the same as the distance between two adjacent extension lines ELS 3 - 2 . 
         [0070]      FIG. 8  is a perspective view showing a substrate peeling apparatus according to an exemplary embodiment of the present invention. 
         [0071]    The substrate peeling apparatus  60  shown in  FIG. 8  is substantially similar to the substrate peeling apparatus  50  shown in  FIG. 1  except for the driver  30 . The absorption pads  20  of the substrate peeling apparatus  60  shown in  FIG. 8  are substantially the same as those of the absorption pads  20  shown in  FIGS. 5 to 7 . Accordingly, the following description will be focused on the driver  30  of the substrate peeling apparatus  60 . 
         [0072]    Referring to  FIG. 8 , the substrate peeling apparatus  60  includes first drivers  31  and second drivers  32 . The first drivers  31  serve to transfer the support member  10  in the up and down direction. The second drivers  32  are positioned on the absorption pads  20 , respectively. 
         [0073]    The first drivers  31  are disposed in a predetermined area of the center of the support member  10  and not overlapped with the second drivers  32 . The second drivers  32  are respectively connected to the absorption pads  20  via holes H. The via holes H penetrate the support member  10 , and thus the second drivel&#39;s  32  are connected to the absorption pads  20 , respectively. Each of the second drivers  32  transfers a corresponding absorption pad of the absorption pads  20  in the up and down direction. 
         [0074]    The absorption pads  20  are attached to the first support substrate  210 . Therefore, the first substrate  110  may be precisely and efficiently peeled away from the first support substrate  210 , and thus the first substrate  110  may be prevented from being damaged. 
         [0075]    The substrate peeling apparatus  60  according to an exemplary embodiment may precisely and accurately peel the first and second substrates  110  and  120  and prevent the first and second substrates  110  and  120  from being damaged. 
         [0076]      FIGS. 9A ,  913 ,  10 A, and  10 B are views showing a drive of the absorption pad. 
         [0077]    Referring to  FIGS. 9A and 9B , the absorption pad  20  may be transferred in the down direction M. The absorption pad  20  transferred in the down direction M makes contact with the first support substrate  210 . Then, the absorption pad  20  is driven to have the vacuum absorption force (V) by the vacuum pump connected to the absorption pad  20 . Thus, the first support substrate  210  may be attached to the absorption pad  20  by the vacuum absorption force (V), but the present invention is not limited thereto. 
         [0078]    For instance, referring to  FIGS. 10A and 10B , the absorption pad  20  is driven to have the vacuum absorption force (V) by the vacuum pump while being transferred in the down direction M. The first support substrate  210  is attached to the absorption pad  20  by the vacuum absorption force (V) when the absorption pad  20  transferred in the down direction M makes contact with the first support substrate  210 . 
         [0079]      FIGS. 11A to 11H  are views showing a method of peeling a substrate using the substrate peeling apparatus according to an exemplary embodiment of the present invention, 
         [0080]    Absorption pads described in the present exemplary embodiment may be the absorption pads  20  shown in  FIGS. 5 to 7 . Hereinafter, the substrate peeling method of the first substrate  110  and the first support substrate  210  using the absorption pads  20  as shown in  FIG. 5  will be described. 
         [0081]    Referring to  FIG. 11A , the knife  40  is disposed to be adjacent to the one end of the first substrate  110  and the first support substrate  210  in the first direction D1. As described above, the one end of the first substrate  110  and the first support substrate  210  in the first direction D1 corresponds to the first apex AX 1  of the support member  10 . 
         [0082]    The first apex AX 1  of the first substrate  110  and the first support substrate  210  may be the first apex AX 1  disposed at a right side in  FIG. 11A . For the convenience of description, the first apex AX disposed at the right side in  FIG. 11A  may be referred to as the first apex AX 1  and only the first apex AX 1  will be shown in the following drawings. 
         [0083]    The knife  40  is inserted into between the first substrate  110  and the first support substrate  210  at the one end of the first substrate  110  and the first support substrate  210  to peel away a predetermined portion of the first substrate  110  from the first support substrate  210 . 
         [0084]    Referring to  FIG. 11B , the support member  10  and the absorption pads  20  connected to the support member  10  are transferred in the down direction. The absorption pads  20  make contact with the upper surface of the first support substrate  210 . 
         [0085]    Among the absorption pads  20 , the absorption pad  20   a  disposed on the third extension line EL 3  adjacent to the first apex AX 1  is driven and the other absorption pads  20  are not driven. Accordingly, the absorption pad  20   a  disposed on the third extension line EL 3  adjacent to the first apex AX 1  applies the vacuum absorption force to the first support. substrate  210 , and other absorption pads do not apply the vacuum absorption force to the first support substrate  210 . As a result, the first support substrate  210  is attached to the absorption pad  20   a  disposed on the third extension line EL 3  adjacent to the first apex AX using the vacuum absorption force. 
         [0086]    According to an exemplary embodiment, a combined structure of the first support substrate  210  and the first substrate  110  is partially separated at a corner portion of the combined structure, and then such separated corner of the combined structure is subject to a pulling-up pressure caused by the absorption pads  20  disposed on the third extension line EL 3  adjacent to the first apex AX 1 . Referring tip  FIG. 11C , the support member  10  and the absorption pads  20  connected to the support member  10  are transferred in the up direction by the driver  30 . 
         [0087]    The absorption pad  20   a  disposed on the third extension line EL 3  adjacent to the first apex AX 1  pulls up the first support substrate  210  using the vacuum absorption force. Other absorption pads  20  are pulled back from the first support substrate  210 , because the other absorption pads  20  are not driven with vacuum absorption forces. Therefore, pulling-up pressure is applied to only the corner portion of the combined structure of the first support substrate  210  and the first substrate  110 . The first substrate  110  start to be peeled away from the first support substrate  210  by the pulling-up force exerted by the absorption pad  20   a  disposed on the third extension line EL 3  adjacent to the first apex AX 1 . 
         [0088]    Since the other absorption pads  20  are not driven except for the absorption pad  20   a  disposed on the third extension line EL 3  adjacent to the first apex AX 1 , the first support substrate  210  is pulled up only through the corner portion corresponding to the first apex AX 1  of the support member  10 . As a result, the first substrate  110  is peeled away from the first support substrate  210  in the area corresponding to the absorption pad  20   a  disposed on the third extension line EL 3  adjacent to the first apex AX 1 . 
         [0089]    For example, the pulling-up force is delivered to the first support substrate  210  through the buffer part  22  of the absorption pad  20   a  disposed on the third extension line EL 3  adjacent to the first apex AX 1 . Due to the pulling-up force, the buffer part applies buffering forces such that the left side portion of the buffer part  22  applies a downward force DF on the first support substrate  210  by being contracted in the up and down direction, and the right side portion of the buffer part  22  applies an upward force UF on the first support substrate  210  by being expanded in the up and down direction. 
         [0090]    When the first support substrate  210  is inclined due to the separation of the separation of the first support substrate  210  from the first substrate  110 , the absorption part  21  is inclined at the same angle because the buffer part  22  is contracted and expanded. 
         [0091]    Referring to  FIG. 11D , the absorption pads  20  are transferred in the down direction by the driver  30  and make contact with the upper surface of the first support substrate  210 . 
         [0092]    Among the absorption pads  20 , the absorption pad  20   b  disposed on the third extension line EL 3  which is the second absorption pad to the left of the first apex AX 1  is driven with a vacuum force and the other absorption pads  20  are not driven. Therefore, the vacuum absorption force is applied to the first support substrate  210  through the absorption pad  20   b  only as described with reference to  FIG. 11B . In  FIG. 11B , the vacuum absorption force is applied to the first support substrate  210  through the absorption pad  20   a  only. In  FIG. 11D , the vacuum absorption force is applied to the first support substrate  210  through the absorption pad  20   b  only. 
         [0093]    Referring to  FIG. 11E , the absorption pad  20   b  is transferred in the up direction by the driver  30 . The absorption pad  20   b  pulls up the first support substrate  210  using the vacuum absorption force. Therefore, the first substrate  110  is further peeled away from the first support substrate  210  by the absorption pad  20   b.  For the convenience of description, the absorption pad  20   b  is formed of one absorption pad, bus as shown in  FIG. 5 , the absorption pad  20   b  may be formed of a predetermined number of absorption pads disposed on the third extension line EL 3  which is spaced apart from the first apex AX 1  in the first direction D1. 
         [0094]    Since the other absorption pads  20  are not driven except for the absorption pad  20   b , the first support substrate  210  is pulled up by the absorption pad  20   b  only. As a result, the first substrate  110  is peeled away from the first support substrate  210  in the area corresponding to the absorption pad  20   b.  Referring back to  FIG. 5 , the absorption pad  20   b  is disposed on the third extension line EL 3  which is the second extension line to the left of the first apex AX 1 . 
         [0095]    Referring to  FIGS. 11F and 11G , the absorption pads  20  are transferred in the up and down direction by the driver  30  and the vacuum absorption three is applied to the first support substrate  210  using the absorption pad  20   c  disposed on the third extension line EL 3  which is the third extension line to the left of the first apex AX 1 . The peeling process of the first substrate  110  from the first support substrate  210  is substantially the same as that described with reference to  FIGS. 11B to 11E . 
         [0096]    Referring to  FIG. 11H , the first substrate  110  may be peeled away from the first support substrate  210  through the above-mentioned processes. 
         [0097]    For example, the support member  10  of the substrate peeling apparatus  50  is repeatedly transferred in the up and down direction by the driver  30 , and thus the absorption pads  20  make contact with the first support substrate  210 . In addition, the absorption pads  20  disposed on the second extension line EL 2  and the third extension lines EL 3  are driven to have the vacuum absorption force from the first apex AX 1  corresponding to the one end of the first substrate  110  along the first direction D1, so that the first substrate  110  is peeled away from the first support substrate  210 . 
         [0098]    According to an exemplary embodiment, the absorption pads  20 , which have various sizes such that the vacuum absorption force proportional to the contact area between the first substrate  110  and the first support substrate  210  is applied, are attached to the first support substrate  210 . As a result, the first substrate  110  may be precisely and efficiently peeled away from the first support substrate  210 , and thus the first substrate  110  may be prevented from being damaged. 
         [0099]      FIGS. 12A and 12B  are views explaining a method of peeling a substrate using the substrate peeling apparatus according to an exemplary embodiment of the present invention. 
         [0100]    The absorption pads  20  may be the absorption pads  20  shown in  FIGS. 5 to 7 . Hereinafter, the substrate peeling method of the first substrate  110  and the first support substrate  210  using the absorption pads  20  as shown in  FIG. 5  will be described. 
         [0101]    Referring to  FIG. 12A , the support member  10  and the absorption pads  20  connected to the support member  10  are transferred in the down direction by the first drivers  31 . The absorption pads  20  make contact with the upper surface of the first support substrate  210 . 
         [0102]    The absorption pads  20  are driven to cause the vacuum absorption force. Accordingly, the first support substrate  210  is attached to the absorption pads  20  by the vacuum absorption force. 
         [0103]    Referring to  FIG. 12B , the second drivers  32  are driven such that the absorption pads  20  corresponding thereto are transferred in the up direction. 
         [0104]    For example, the second drivers  32  disposed on each of the third extension tine EL 3  are driven to allow the corresponding absorption pads  20  to be substantially simultaneously transferred in the up direction. In addition, the second drivers  32  disposed on the second extension line EL 2  are driven to allow the corresponding absorption pads  20  to be substantially simultaneously transferred in the up direction. 
         [0105]    Thus, the absorption pads  20  disposed on the same third extension line EL 3  are substantially simultaneously transferred in the up direction, and the absorption pads  20  disposed on the second extension line EL 2  are substantially simultaneously transferred in the up direction. 
         [0106]    The second drivers  32  disposed on the second extension line EL 2  and the third extension lines EL 3  are sequentially driven from the first apex AX 1  along the first direction D1. Accordingly, the absorption pads  20  are sequentially transferred in the up direction from the first apex AX 1  by the second drivers  32 . 
         [0107]    In this case, the first substrate  110  is sequentially peeled away from the first apex AX 1  along the first direction D1 as shown in  FIG. 12B . 
         [0108]    For example, the support member  10  is transferred in the down direction by the first drivers  31  to make contact with the absorption pads  20 . Then, the absorption pads  20 , which are driven to have the vacuum absorption force, are attached to the first support substrate  210  using the vacuum absorption force. After that, the absorption pads  20  disposed on the second extension line EL 2  and the third extension lines EL 3  are sequentially transferred in the up direction from the first apex AX 1  by the second drivers  32 , and thus the first substrate  110  is peeled away from the first support substrate  210 . 
         [0109]    The absorption pads  20 , which have various sizes such that the absorption force applied to the first support substrate is proportional to the contact area between the first substrate  110  and the first support substrate  210 , are attached to the first support substrate  210 . Therefore, the first substrate  110  may be precisely and efficiently peeled away from the first support substrate  210 , and thus the first substrate  110  may be prevented from being damaged. 
         [0110]    While the present invention has been shown and described with reference to exemplary embodiments thereof, it will be apparent to those of ordinary skill in the art that various changes in form and detail may he made therein without departing from the spirit and scope of the inventive concept as defined by the following claims.