Patent Publication Number: US-2023152706-A1

Title: Irradiating module, and apparatus for treating substrate with the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     A claim for priority under 35 U.S.C. § 119 is made to Korean Patent Application No. 10-2021-0159185 filed on Nov. 18, 2021, in the Korean Intellectual Property Office, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND 
     Embodiments of the inventive concept described herein relate to an irradiating module and a substrate treating apparatus with the same, more specifically, a substrate treating apparatus having an irradiating module for irradiating a light to a substrate. 
     A photolithography process for forming a pattern on the wafer includes an exposing process. The exposing process is an operation which is previously performed for cutting a semiconductor integrated material attached to the wafer into a desired pattern. The exposing process may have various purposes such as forming a pattern for an etching and forming a pattern for the ion implantation. In the exposing process, the pattern is drawn in on the wafer with a light using a mask, which is a kind of ‘frame’. When the light is exposed to the semiconductor integrated material on the wafer, for example, a resist on the wafer, chemical properties of the resist change according to a pattern by the light and the mask. When a developing liquid is supplied to a resist which chemical properties have changed according to the pattern, the pattern is formed on the wafer. 
     In order to precisely perform the exposing process, the pattern formed on the mask must be precisely manufactured. It must be confirmed whether the pattern is formed satisfactory to the process conditions. A large number of patterns are formed on one mask. That is, it takes a lot of time to inspect all of the large number of patterns to inspect one mask. Accordingly, a monitoring pattern capable of representing one pattern group including a plurality of patterns is formed on the mask. In addition, an anchor pattern that may represent a plurality of pattern groups are formed on the mask. The operator may estimate whether patterns formed on the mask are good or not through an inspecting of a monitoring pattern. In addition, the operator may estimate whether patterns formed are the mask are good or not through an inspecting of the anchor pattern. 
     Also, in order to increase an accuracy of the mask inspection, it is desirable that critical dimension of the monitoring pattern and the anchor pattern are the same. Accordingly, a critical dimension correction process for precisely correcting the critical dimension of patterns formed on the mask is additionally performed. 
       FIG.  1    illustrates a normal distribution regarding a first critical dimension CDP 1  of the monitoring pattern of the mask and a second critical dimension CDP 2  (a critical dimension of the anchor pattern) before a critical dimension correction process is performed during a mask manufacturing process. In addition, the first critical dimension CDP 1  and the second critical dimension CDP 2  have a size smaller than a target critical dimension. Before the critical dimension correction process is performed, there is a deliberate deviation between the critical dimension of the monitoring pattern and the anchor pattern (CD, critical dimension). And, by additionally etching the anchor pattern in the critical dimension correction process, the critical dimension of these two patterns are made the same. In the process of over-etching the anchor pattern, if the anchor pattern is more over-etched than the monitoring pattern, a difference in the critical dimension of the monitoring pattern and the anchor pattern occurs, and thus the critical dimension of the patterns formed at the mask may not be accurately corrected. When additionally etching the anchor pattern, a precise etching with respect to the anchor pattern should be accompanied. 
     In order for the anchor pattern to be accurately etched, an angle and output of light irradiated to the anchor pattern must be precisely adjusted. If particles or droplets of a treating liquid are attached to an irradiator in which a light is irradiated to the anchor pattern, an angle of light irradiated to the anchor pattern is distorted and the irradiation path of light is changed. Accordingly, a profile of the light irradiated to the anchor pattern may be changed. For this reason, a precise etching of the anchor pattern may not be performed. In addition, particles or droplets attached to the irradiator cause a corrosion of the irradiator and act as a factor which reduces a durability of the irradiator. 
     SUMMARY 
     Embodiments of the inventive concept provide an irradiating module and a substrate treating apparatus with the same for efficiently treating a substrate. 
     Embodiments of the inventive concept provide an irradiating module and a substrate treating apparatus with the same for performing a precise etching on a substrate. 
     Embodiments of the inventive concept provide an irradiating module and a substrate treating apparatus which with the same with a high durability for minimizing particles generated during a process and an influence of an ink drop. 
     The technical objectives of the inventive concept are not limited to the above-mentioned ones, and the other unmentioned technical objects will become apparent to those skilled in the art from the following description. 
     A substrate treating apparatus includes a support unit supporting and rotating a substrate at a treating space, a liquid supply unit supplying a liquid to the substrate supported by the support unit, a housing having an installation space, a laser unit including a laser in the installation space which emits a laser light in a first direction, a reflector directing the laser light in a second direction, and an irradiation end extending in the second direction through a bottom surface of the housing and emitting the laser light toward the substrate supported by the support unit, and a cover having an inner space into which the irradiation end protrudes from the housing. The cover includes an opening at a bottom of the cover and the laser light emitted from the irradiation end passes through the opening of the cover. 
     According to an embodiment of the present disclosure, an irradiating module for irradiating a light to a substrate includes: a housing having an installation space; a laser unit configured to include a laser irradiation unit positioned in the installation space which irradiates a laser light, and an irradiation end having an end positioned to protrude from the housing and which irradiates the laser light irradiated from the laser irradiation unit to the substrate; and a cover having an inner space and positioned so an end of the irradiation end protruding from the housing is positioned in the inner space, and wherein an opening is formed at a bottom end of the cover to overlap the laser light irradiated from the irradiation end when seen from above. 
     In an embodiment, the irradiating module further includes a purge gas supply unit for supplying a purge gas to the inner space. 
     In an embodiment, a dividing member in a ring shape is installed at the inner space of the cover to divide the inner space into a buffer space which is above and a bottom space. 
     In an embodiment, the dividing member includes: a first slit formed at a region which is adjacent to a part at which the purge gas is supplied to in the inner space among the inner space, and which has a first opening area; and a second slit formed at a region facing the part at which the purge gas is supplied to in the inner space among the inner space, and which has a second opening area, and wherein the first opening area is smaller than the second opening area. 
     In an embodiment, a purge port is formed and connected to the purge gas supply unit at an end of the housing, and a supply port is installed at a side of the cover which is spaced apart from a central axis of the irradiation end when seen from the front, and which supplies the purge gas to the inner space, and the irradiation module further comprises a flow cover combined to the side of the cover to connect the purge port and the supply port, which has a flow space for flowing the purge gas within. 
     In an embodiment, the irradiating module further includes a cover plate provided to cover the opening and which is provided as a material which passes the laser light through. 
     According to an embodiment of the present disclosure, a substrate treating apparatus is provided for treating a mask having a plurality of cells. The substrate treating apparatus includes a support unit configured to support and rotate the mask on which a first pattern is formed within the plurality of cells and a second pattern is formed outside a region at which the cells are formed; a liquid supply unit configured to supply a liquid to the mask supported at the support unit; a housing having an installation space; a laser unit configured to include a laser irradiation unit positioned in the installation space which irradiates a laser light, and an irradiation end having an end positioned to protrude from the housing and which irradiates the laser light irradiated from the laser irradiation unit to the second pattern among the first pattern and the second pattern; and a cover having an inner space and positioned so an end of the irradiation end protruding from the housing is positioned in the inner space, and wherein an opening is formed to overlap a laser light irradiated from the irradiation end when seen from the above. 
     In an embodiment, the substrate treating apparatus further includes a purge gas supply unit for supplying a purge gas to the inner space. 
     In an embodiment, a dividing member in a ring shape is installed at the inner space of the cover to divide the inner space into a buffer space which is above and a bottom space, and the dividing member includes: a first slit formed at a region which is adjacent to a part at which the purge gas is supplied to in the inner space among the inner space, and which has a first opening area; and a second slit formed at a region facing the part at which the purge gas is supplied to in the inner space among the inner space, and which has a second opening area, and wherein the first opening area is smaller than the second opening area. 
     In an embodiment, a purge port is formed and connected to the purge gas supply unit at an end of the housing, and a supply port is installed at a side of the cover which is spaced apart from a central axis of the irradiation end when seen from the front, and which supplies the purge gas to the inner space, and the substrate treating apparatus further comprises a flow cover combined to the side of the cover to connect the purge port and the supply port, which has a flow space for flowing the purge gas within. 
     According to an embodiment of the present disclosure, a substrate may be efficiently treated. 
     According to an embodiment of the present disclosure, a precise etching may be performed on a substrate. 
     According to an embodiment of the present disclosure, an etching of a specific pattern formed on a substrate may be precisely performed. 
     According to an embodiment of the present disclosure, particles generated during a process or an influence of ink drops are minimized to increase a durability of the irradiating module and a substrate treating apparatus. 
     The effects of the inventive concept are not limited to the above-mentioned ones, and the other unmentioned effects will become apparent to those skilled in the art from the following description. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
       The above and other objects and features will become apparent from the following description with reference to the following figures, wherein like reference numerals refer to like parts throughout the various figures unless otherwise specified, and wherein: 
         FIG.  1    illustrates a normal distribution of a critical dimension of a monitoring pattern and a critical dimension of an anchor pattern. 
         FIG.  2    is a plan view schematically illustrating a substrate treating apparatus according to an embodiment of the present disclosure. 
         FIG.  3    schematically illustrates a state of a substrate treated at a liquid treating chamber of  FIG.  2    seen from above. 
         FIG.  4    schematically illustrates an embodiment of the liquid treating chamber of  FIG.  2   . 
         FIG.  5    is a top view of the liquid treating chamber of  FIG.  4   . 
         FIG.  6    schematically illustrates an irradiating module of  FIG.  4    viewed from the front. 
         FIG.  7    schematically illustrates the irradiating module of  FIG.  6    as viewed from above. 
         FIG.  8    schematically illustrates a cover and a flow cover viewed from above according to an embodiment of  FIG.  6   . 
         FIG.  9    schematically illustrates a dividing member according to an embodiment of  FIG.  6    as viewed from above. 
         FIG.  10    schematically illustrates a state in which a purge gas flows inside the irradiating module of  FIG.  6   . 
         FIG.  11    schematically illustrates an embodiment of the detection unit and the support unit of  FIG.  4   . 
         FIG.  12    is a view of the detection unit of  FIG.  11    as viewed from above. 
         FIG.  13    schematically illustrates a top view of another embodiment of the dividing member of  FIG.  6   . 
         FIG.  14    schematically illustrates a top view of another embodiment of the cover and the flow cover of  FIG.  6   . 
         FIG.  15    schematically illustrates a state in which a purge gas flows in the purge space of  FIG.  14   . 
         FIG.  16    schematically illustrates a front view of another embodiment of the irradiating module of  FIG.  6   . 
     
    
    
     DETAILED DESCRIPTION 
     The inventive concept may be variously modified and may have various forms, and specific embodiments thereof will be illustrated in the drawings and described in detail. However, the embodiments according to the concept of the inventive concept are not intended to limit the specific disclosed forms, and it should be understood that the present inventive concept includes all transforms, equivalents, and replacements included in the spirit and technical scope of the inventive concept. In a description of the inventive concept, a detailed description of related known technologies may be omitted when it may make the essence of the inventive concept unclear. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the inventive concept. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. Also, the term “exemplary” is intended to refer to an example or illustration. 
     Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. 
     Hereinafter, an embodiment of the present disclosure will be described in detail with reference to  FIG.  2    to  FIG.  16   .  FIG.  2    is a plan view schematically illustrating a substrate treating apparatus according to an embodiment of the present disclosure. 
     Referring to  FIG.  2   , the substrate treating apparatus includes an index module  10 , a treating module  20 , and a controller  30 . According to an embodiment, when viewed from the front, the index module  10  and the treating module  20  may be disposed along a direction. 
     Hereinafter, a direction in which the index module  10  and the treating module  20  are disposed is defined as a first direction X, a direction perpendicular to the first direction X when viewed from above is defined as a second direction Y, and a direction perpendicular to a plane including both the first direction X and the second direction Y is defined as a third direction Z. 
     The index module  10  transfers a substrate M from a container C in which the substrate M is accommodated to the treating module  20  for treating the substrate M. The index module  10  stores a substrate M on which a predetermined treatment has been completed at the treating module  20  in the container C. A lengthwise direction of the index module  10  may be formed in the second direction Y. The index module  10  may have a load port  12  and an index frame  14 . 
     The container C in which the substrate M is accommodated is seated on the load port  12 . The load port  12  may be positioned on an opposite side of the treating module  20  with respect to the index frame  14 . A plurality of load ports  12  may be provided, and the plurality of load ports  12  may be arranged in a line along the second direction Y. The number of load ports  12  may increase or decrease according to a process efficiency and foot print conditions, etc. of the treating module  20 . 
     As the container C, a sealing container such as a front opening unified pod (FOUP) may be used. The container C may be placed on the load port  12  by a transfer means (not shown) such as an overhead transfer, an overhead conveyor, or an automatic guided vehicle, or by an operator. 
     The index frame  14  provides a transfer space for transferring the substrate W. An index robot  120  and an index rail  124  may be provided at the index frame  14 . The index robot  120  transfers the substrate M. The index robot  120  may transfer the substrate M between the index module  10  and the buffer unit  200  to be described later. The index robot  120  includes an index hand  122 . The substrate M may be placed on the index hand  122 . The index hand  122  may be provided to be forwardly and backwardly movable, rotatable in the third direction Z, and movable along the third direction Z. The index hand  122  may be provided in plural. A plurality of index hands  122  may be provided to be spaced apart from each other in an up/down direction. The plurality of index hands  122  may be forwardly and backwardly movable independently of each other. 
     The index rail  124  is provided in the index frame  14 . The index rail  124  is provided with its lengthwise direction along the second direction Y. The index robot  120  may be placed on the index rail  124 , and the index robot  120  may be linearly movable along the index rail  124 . 
     The controller  30  may control a substrate treating apparatus  1 . The controller  30  may control a configuration provided to the substrate treating apparatus  1 . The controller  30  may comprise a process controller consisting of a microprocessor (computer) that executes a control of the substrate treating apparatus  1 , a user interface such as a keyboard via which an operator inputs commands to manage the substrate treating apparatus  1 , and a display showing the operation situation of the substrate treating apparatus  1 , and a memory unit storing a treating recipe, i.e., a control program to execute treating processes of the substrate treating apparatus  1  by controlling the process controller or a program to execute components of the substrate treating apparatus  1  according to data and treating conditions. In addition, the user interface and the memory unit may be connected to the process controller. The treating recipe may be stored in a storage medium of the storage unit, and the storage medium may be a hard disk, a portable disk, such as a CD-ROM or a DVD, or a semiconductor memory, such as a flash memory. 
     The treating module  20  may include a buffer unit  200 , a transfer frame  300 , and a liquid treating chamber  400 . The buffer unit  200  provides a space in which a substrate M taken into the treating module  20  and a substrate M taken out of the treating module  20  temporarily remain. The transfer frame  300  provides a space for transferring the substrate M between the buffer unit  200 , the liquid treating chamber  400 , and the drying chamber  500 . The liquid treating chamber  400  supplies a liquid onto the substrate M to perform a liquid treatment process for treating the substrate M. The drying chamber  500  performs a drying process for drying the substrate W on which a liquid treatment has been completed. 
     The buffer unit  200  may be disposed between the index frame  14  and the transfer frame  300 . The buffer unit  200  may be positioned at an end of the transfer frame  300 . A slot (not shown)in which the substrate M is placed is provided inside the buffer unit  200 . The slot (not shown) may be provided in a plurality. The plurality of slots (not shown) may be provided to be spaced apart from each other in the third direction Z. 
     A front face and a rear face of the buffer unit  200  are opened. The front face is a surface facing the index module  10 , and the rear face is a surface facing the transfer frame  300 . The index robot  120  may approach the buffer unit  200  through the front face, and the transfer robot  320  to be described later may approach the buffer unit  200  through the rear face. 
     The transfer frame  300  may have a lengthwise direction provided in the first direction X. The liquid treating chamber  400  and the drying chamber  500  may be disposed on both sides of the transfer frame  300 . The liquid treating chamber  400  and the drying chamber  500  may be disposed at a side of the transfer frame  300 . The transfer frame  300  and the liquid treating chamber  400  may be disposed along the second direction Y. The transfer frame  300  and the drying chamber  500  may be disposed along the second direction Y. 
     According to an embodiment, liquid treating chambers  400  may be disposed on both sides of the transfer frame  300 . The liquid treating chambers  400  may be provided in an arrangement of AX B (where A and B are natural numbers greater than  1  or  1  respectively) along the first direction X and the third direction Z respectively at aside of the transfer frame  300 . 
     The transfer frame  300  includes a transfer robot  320  and a transfer rail  324 . The transfer robot  320  transfers the substrate M. The transfer robot  320  transfers the substrate M between the buffer unit  200 , the liquid treating chamber  400 , and the drying chamber  500 . The transfer robot  320  includes a transfer hand  322  on which the substrate M is placed. The substrate M may be placed on the transfer hand  322 . The transfer hand  322  may be provided to be forwardly and backwardly movable, to be rotatable around the third direction Z, and movable along the third direction Z. The transfer hand  322  may be provided in plural. The plurality of transfer hands  322  are provided to be spaced apart from each other in the up/down direction, and the plurality of transfer hands  322  may be forwardly and backwardly movable independently of each other. 
     The transfer rail  324  may be provided in the transfer frame  300  along a lengthwise direction of the transfer frame  300 . In an embodiment, the lengthwise direction of the transfer rail  324  may be provided along the first direction X. The transfer robot  320  may be placed on the transfer rail  324  and the transfer robot  320  may be movable on the transfer rail  324 . 
       FIG.  3    schematically illustrates the substrate treated at the liquid treating chamber of  FIG.  2    seen from above. Hereinafter, a substrate M treated in the liquid treating chamber  400  will be described in detail according to an embodiment of the present disclosure referring to  FIG.  3   . 
     Referring to  FIG.  3   , an object to be treated in the liquid treating chamber  400  may be any one of a wafer, a glass, and a photomask. For example, the substrate M treated in the liquid treating chamber  400  according to an embodiment of the present disclosure may be a photo mask, which is a ‘frame’ used in an exposing process. 
     The substrate M may have a rectangular form. The substrate M may be a photo mask that is a ‘frame’ used in the exposing process. At least one reference mark AK may be marked on the substrate M. For example, a plurality of reference marks AK may be formed in each corner region of the substrate M. The reference mark AK may be a mark called an align key used when aligning the substrate M. Also, the reference mark AK may be a mark used to derive a position of the substrate M. For example, an imaging unit  4540  to be described later may acquire an image by imaging the reference mark AK and transmit the acquired image to the controller  30 . The controller  30  then may analyze the image including the reference mark AK to detect an accurate position of the substrate M. In addition, the reference mark AK may be used to determine a position of the substrate M when the substrate M is transferred. 
     A cell CE may be formed on the substrate M. At least one cell CE, for example, a plurality of cells CE may be formed. A plurality of patterns may be formed at each cell CE. The patterns formed at each cell CE may be defined as one pattern group. Patterns formed at the cell CE may include an exposing pattern EP and a first pattern P 1 . A second pattern P 2  may be proved in a region outside the cell region where the plurality of cells care formed. 
     The exposing pattern EP may be used to form an actual pattern on the substrate M. The first pattern P 1  may be a single-cell representative pattern representing exposing patterns EP in one cell CE. In addition, when the plurality of cells CE are provided, the first pattern is provided in each cell, thereby a plurality of first patterns P 1  may be provided. In an embodiment, each of the plurality of cells CE may be provided with single first pattern P 1 . However, the present disclosure is not limited thereto, and the plurality of first patterns P 1  may be formed in one cell CE. The first pattern P 1  may have a form in which portions of each exposing pattern EP are combined. The first pattern P 1  may be referred to as a monitoring pattern. An average value of critical dimension of the plurality of first patterns P 1  may be referred to as a critical dimension monitoring macro (CDMM). 
     When an operator inspects the first pattern P 1  formed at any one cell CE through a scanning electron microscope (SEM), it is possible to estimate whether a form of the exposing patterns EPs formed in one cell CE are good or bad. The first pattern P 1  may serve as an inspection pattern to inspect the exposing patters EPs. Also, unlike the above-described example, the first pattern P 1  may be any one of the exposing patterns EPs used in an actual exposing process. Selectively, the first pattern P 1  may be serve as not only inspection pattern to inspect the exposing patterns but also simultaneously a exposing pattern used in the actual exposing. 
     The second pattern P 2  may be an entire-cell representative pattern representing exposing patterns EP on whole cells of the substrate M. For example, the second pattern P 2  may have a form in which portions of each of the first patterns P 1  are combined. 
     When the operator inspects the second pattern P 2  through the scanning electron microscope (SEM), it is possible to estimate whether a form of the exposing patterns EPs formed on one substrate M are good or bad. Accordingly, the second pattern P 2  may serve an inspection pattern. In addition, the second pattern P 2  may be an inspection pattern that is not used in an actual exposing process. The second pattern P 2  may be a pattern for setting a process condition of an exposing apparatus. The second pattern P 2  may be referred to as an anchor pattern. 
     Hereinafter, the liquid treating chamber  400  according to an embodiment of the present disclosure will be described in detail. Hereinafter, a treating process performed while the liquid treating chamber  400  performs a fine critical dimension correction (FCC) process during a process of manufacturing a mask for an exposing process will be described as an example. 
     A substrate M to be taken in and treated at the liquid treating chamber  400  may be a substrate M on which a pre-treatment has been performed. A critical dimension of the first pattern P 1  and a critical dimension of the second pattern P 2  of the substrate M to be taken into the liquid treating chamber  400  may be different from each other. According to an embodiment of the present disclosure, the critical dimension of the first pattern P 1  may be greater than the critical dimension of the second pattern P 2 . In on embodiment, the critical dimension of the first pattern P 1  has a first width (e.g., 69 nm). The critical dimension of the second pattern P 2  may have a second width (e.g., 68.5 nm). 
       FIG.  4    schematically illustrates an embodiment of the liquid treating chamber of  FIG.  2   .  FIG.  5    is a top view of the liquid treating chamber of  FIG.  4   . Referring to  FIG.  4    and  FIG.  5   , the liquid treating chamber  400  may include a housing (not shown), a support unit  420 , a treating container  430 , a liquid supply unit  440 , and an irradiating module  450 . 
     The housing  410  has an inner space. The inner space may have a support unit  420 , a treating container  430 , a liquid supply unit  440 , and an irradiating module  450 . The housing  410  may have a gateway (not shown) provided through which the substrate M may be taken in and taken out. An inner wall surface of the housing (not shown) may be coated with a material having a high corrosion resistance to a chemical supplied by the liquid supply unit  440 . 
     An exhaust hole (not shown) may be formed on a bottom surface of the housing (not shown). The exhaust hole (not shown) may be connected to an exhaust member such as a pump capable of exhausting an inner space. A fume or the like that may be generated at the inner space may be exhausted to an outside of the housing (not shown) through the exhaust hole (not shown). 
     The support unit  420  may support the substrate M. The support unit  420  may support the substrate W in a treating space of the treating container  430  to be described later. The support unit  420  may rotate the substrate M. The support unit  420  may include a body  421 , a support pin  422 , a support shaft  426 , and a driving member  427 . 
     The body  421  may have a plate form. The body  421  may have a plate form having a constant thickness. The body  421  may have a top surface provided in a generally circular form when viewed from above. The top surface of the body  421  may be provided to have an area larger than that of the substrate M. The support pin  422  may be installed on the body  421 . 
     The support pin  422  supports the substrate M. When viewed from above, the support pin  422  may have a downwardly stepped portion to support the substrate M. The stepped portion of the support pin  422  may have a first surface and a second surface. For example, the first surface may support a back-side (bottom side) surface at edge region of the substrate M. The second surface may face a side surface of the edge region substrate M. Accordingly, if the substrate M rotates, a lateral movement of the substrate M may be limited. 
     At least one support pin  422  is provided. In an embodiment, a plurality of support pins  422  may be provided. The support pins  422  may be provided in a number corresponding to the number of corners of the substrate M having a rectangular form. The support pin  422  may support the back-side (bottom surface) of the substrate M to be spaced apart from a top surface of the body  421 . 
     The support shaft  426  is coupled to the body  421 . The support shaft  426  is positioned below the body  421 . The support shaft  426  may be a hollow shaft. A fluid supply line  428  may be formed inside the hollow shaft. The fluid supply line  428  may supply a treating fluid or/and a treating gas to a bottom portion of the substrate M. For example, the treating fluid may include a chemical or a rinsing liquid. The chemical may be an acid or a liquid having a base property. The rinsing liquid can be a pure water. For example, the treating gas may be an inert gas. The treating gas may dry the bottom portion of the substrate M. However, unlike the above-described example, the fluid supply line  428  may not be provided inside the support shaft  426 . 
     The support shaft  426  may be rotated by the driving member  427 . The driving member  427  may be a hollow motor. When the driving member  427  rotates the support shaft  426 , the body  421  coupled to the support shaft  426  may rotate. The substrate M may be rotated together with a rotation of the body  421  via the support pin  422 . 
     The treating container  320  has a treating space. The treating container  430  has a treating space at which the substrate M is treated. In an embodiment, the treating container  430  may have a treating space with an open top. The treating container  430  may have a cylindrical form with an open top. The substrate M may be liquid-treated and heat-treated in the treating space. The treating container  430  can prevent the treating liquid supplied to the substrate M from being scattered to the housing  410 , the liquid supply unit  440 , and the irradiating module  450 . 
     The treating container  430  may have a plurality of recollecting containers  432   a,    432   b,  and  432   c.  Each of the recollecting containers  432   a,    432   b,  and  432   c  may separately recollect different liquids from each other among liquids used for treating the substrate M. Each of the recollecting containers  432   a,    432   b,  and  432   c  may have a recollecting space for recollecting a liquid used for treating the substrate M. Each of the recollecting containers  432   a,    432   b,  and  432   c  may be provided in an annular ring form surrounding the support unit  420  when seen from above. When the liquid treatment process is performed, a liquid scattered by a rotation of the substrate M is introduced into the recollecting space through an inlet, which is a space formed between the recollecting containers  432   a,    432   b,  and  432   c,  respectively. The different types of treating liquids may be introduced into each of the recollecting containers  432   a,    432   b,  and  432   c.    
     According to an embodiment, the treating container  430  may have a first recollecting container  432   a,  a second recollecting container  432   b,  and a third recollecting container  432   c.  The first recollecting container  432   a  may be provided in an annular ring form surrounding the support unit  420 . The second recollecting container  432   b  may be provided in an annular ring form surrounding the first recollecting container  432   a.  The third recollecting container  432   c  may be provided in an annular ring form surrounding the second recollecting container  432   b.    
     To each of the recollecting containers  432   a,    432   b,    432   c,  recollecting lines  434   a,    434   b,    434   c  extending vertically in a bottom direction of a respective bottom surface can be connected. Each of the recollecting lines  434   a,    434   b,    434   c  may discharge a treating liquid introduced through each of the recollecting containers  432   a,    432   b,    432   c.  A discharged treating liquid may be reused through an outer treating liquid regeneration system (not shown). 
     The treating container  430  may be coupled to a lifting/lowering member  436 . The lifting/lowering member may move the treating container  430 . For example, the lifting/lowering member  436  may change a position of the treating container  430  along the third direction Z. The lifting/lowering member  436  may be a driving device for moving the treating container  430  in the up/down direction. The lifting/lowering member  436  may move the treating container  430  in an upward direction while a liquid treatment and/or a heat treatment are performed on the substrate M. The lifting/lowering member  436  may move the treating container  430  in a downward direction when the substrate M is taken into the inner space or the substrate M is taken out of the inner space. 
     The liquid supply unit  440  may supply a liquid to the substrate M. The liquid supply unit  440  may supply a treating liquid for liquid treating the substrate M. The liquid supply unit  440  may supply the treating liquid to a substrate M supported by the support unit  420 . In an embodiment, the liquid supply unit  440  may supply the treating liquid to a substrate M having a first pattern formed within a plurality of cells CE and a second pattern P 2  formed outside a region at which the cells CE are formed. 
     The treating liquid may be an etching liquid or a rinsing liquid. The etching liquid may be a chemical. The etching liquid may etch a pattern formed on the substrate M. The etching liquid may also be referred to as an etching liquid. The etching liquid may be a liquid containing a mixed solution in which an ammonia, a water, and additives are mixed and a hydrogen peroxide is included. The rinsing liquid may clean the substrate M. The rinsing liquid may be provided as a known chemical liquid. 
     Referring to  FIG.  5   , the liquid supply unit  440  may include a nozzle  441 , a fixing body  442 , a rotation shaft  443 , and a rotation member  444 . The nozzle  441  may supply the treating liquid to the substrate M supported by the support unit  420 . An end of the nozzle  441  may be connected to an end of the fixing body  442 , and another end thereof may extend in a direction from the fixing body  442  toward the substrate M. The nozzle  411  may extend from the fixing body  442  in the first direction X. 
     The nozzle  411  may include a first nozzle  411   a,  a second nozzle  411   b,  and a third nozzle  411   c.  Any one of the first nozzle  411   a,  the second nozzle  411   b,  or the third nozzle  411   c  may supply a chemical among the above-described treating liquids. In addition, another one of the first nozzle  411   a,  the second nozzle  411   b,  and the third nozzle  411   c  may supply the rinsing liquid R among the aforementioned treating liquids. The last one of the first nozzle  411   a,  the second nozzle  411   b,  or the third nozzle  411   c  may supply a different kind of chemical which is different from a chemical supplied by the another one of the first nozzle  411   a,  the second nozzle  411   b,  or the third nozzle  411   c.    
     A body  442  may fix and support the nozzle  441 . The body  442  may be connected to the rotation shaft  443  rotated in the third direction Z by the rotation member  444 . When the rotation member  444  rotates the rotation shaft  443 , the body  442  may rotate around the third direction Z. Accordingly, an outlet of the nozzle  441  may move between a liquid supply position which is a position where the treating liquid is supplied to the substrate M and a standby position which is a position where the treating liquid is not supplied to the substrate M. 
       FIG.  6    schematically illustrates the irradiating module of  FIG.  4    viewed from the front.  FIG.  7    schematically illustrates the irradiating module of  FIG.  6    as viewed from above. Hereinafter, an irradiating module according to an embodiment of the present disclosure will be described in detail with reference to  FIG.  6    and  FIG.  7   . 
     The irradiating module  450  may irradiate the light with respect to the substrate M. For example, the irradiating module  450  may heat the substrate M. In addition, the irradiating module  450  may monitor a heat treatment performed on the substrate M. The irradiating module  450  may include a housing  4510 , a moving unit  4520 , a laser unit  4530 , an imaging unit  4540 , a purge gas supply unit  4550 , a cover  4560 , and a flow cover  4580 . 
     The housing  4510  has an installation space therein. The laser unit  4530  and the imaging unit  4540  may be positioned in the installation space of the housing  4510 . In an embodiment, a laser unit  4530 , a camera unit  4542 , and a lighting unit  4544  may be positioned in the installation space of the housing  4510 . The housing  4510  protects the laser unit  4530  and the imaging unit  4540  from particles, a fume, or scattering droplets generated during the process. 
     The purge gas supply line  4552  to be described later may be disposed in the installation space of the housing  4510 . A purge port  4512  may be formed on the bottom surface of the housing  4510 . The purge port  4512  may allow the purge gas supplied from the purge gas supply unit  4550  to be described later to flow. The purge port  4512  may communicate with a flow space of the flow cover  4580  to be described later. 
     An opening may be formed under the housing  4510 . An irradiation end  4535  to be described later may be inserted into the opening of the housing  4510 . As the irradiation end  4535  is inserted into the opening of the housing  4510 , an end of the irradiation end  4535  can be positioned to protrude from the bottom end of the housing  4510 . For example, a portion of the barrel  4537  to be described later may protrude from the bottom end of the housing  4510 . 
     The moving unit  4520  moves the housing  4510 . The moving unit  4520  may move the irradiation end  4535  to be described later by moving the housing  4510 . The moving unit  4520  may include a driver  4522 , a shaft  4524 , and a moving member  4526 . 
     The driver  4522  may be a motor. The driver  4522  may be connected to the shaft  4524 . The driver  4522  may move the shaft  4524  in the vertical direction. The driver  4522  may rotate the shaft  4524 . In an embodiment, a plurality of drivers  4522  may be provided. One of the plurality of drivers  4522  may be provided as a rotating motor for rotating the shaft  4524 , and the other of the plurality of drivers  4522  may be provided as a linear motor for moving the shaft  4524  in the vertical direction. 
     The shaft  4524  may be connected to the housing  4510 . The shaft  4524  may be connected to the housing  4510  via a moving member  4526 . As the shaft  4524  rotates, the housing  4510  may also rotate. Accordingly, the position of the irradiation end  4535  to be described later may also be changed. For example, the position of the irradiation end  4535  may be changed in the third direction Z. In addition, the position of the irradiation end  4535  may be changed with respect to the third direction Z as a rotation axis. 
     When viewed from above, a center of the irradiation end  4535  may move while drawing an arc toward a center of the shaft  4524 . When viewed from above, the center of the irradiation end  4535  may be moved to pass through the center of the substrate M supported by the support unit  420 . The irradiation end part  4535  may be moved between a process position of irradiating the laser light L to the substrate M by the moving unit  4520  and a standby position, which is a position of standing by without performing the heat treatment on the substrate M. 
     The moving member  4526  may be provided between the housing  4510  and the shaft  4524 . The moving member  4526  may be an LM guide. The moving member  4526  may move the housing  4510  in a lateral direction. The moving member  4526  may move the housing  4510  in the first direction X and/or the second direction Y. The position of the irradiation end  4535  may be variously changed by the driver  4522  and the moving member  4526 . 
     The laser unit  4530  may heat the substrate M. The laser unit  4530  may heat the substrate M supported by the support unit. The laser unit  4530  may heat a partial region of the substrate M. The laser unit  4530  may heat a specific region of the substrate M. The laser unit  4530  may heat the substrate M on which a liquid film is formed by supplying a chemical. The laser unit  4530  may heat a pattern formed on the substrate M. The laser unit  4530  may heat any one of the first pattern P 1  and the second pattern P 2 . The laser unit  4530  may heat the second pattern P 2  of the first pattern P 1  and the second pattern P 2 . According to an embodiment, the laser unit  4530  may heat the second pattern P 2  by irradiating the laser light L. 
     The laser unit  4530  may include a laser irradiation unit  4531 , a beam expander  4532 , a tilting member  4533 , a bottom reflective member  4534  (i.e., a bottom reflector), and a irradiation end  4535  (i.e., a lens). The laser irradiation unit  4531  irradiates the laser light L. The laser irradiation unit  4531  may irradiate the laser light L having a straightness. The laser light L irradiated from the laser irradiation unit  4531  may be irradiated to the substrate M through the bottom reflective member  4534  and the irradiation end  4535  to be described later. In an embodiment, the laser light L irradiated from the laser irradiation unit  4531  may be irradiated with a second pattern P 2  formed on the substrate M through the bottom reflective member  4534  and the irradiation end  4535  in order. 
     The beam expander  4532  may control characteristics of the laser light L irradiated by the laser irradiation unit  4531 . The beam expander  4532  may adjust the shape of the laser light L irradiated from the laser irradiation unit  4531 . In addition, the beam expander  4532  may adjust the profile of the laser light L irradiated from the laser irradiation unit  4531 . For example, a diameter of the laser light L emitted from the laser irradiation unit  4531  may be changed in the beam expander  4532 . The diameter of the laser light L emitted by the laser irradiation unit  4531  may be expanded or reduced in the beam expander  4532 . 
     The tilting member  4533  may tilt an irradiation direction of the laser light L emitted by the laser irradiation unit  4531 . The tilting member  4533  may rotate the laser irradiation unit  4531  based on an axis. The tilting member  4533  may rotate the laser irradiation unit  4531  to tilt the irradiation direction of the laser light L irradiated from the laser irradiation unit  4531 . The tilting member  4533  may include a motor. 
     The bottom reflective member  4534  may change the irradiation direction of the laser light L irradiated from the laser irradiation unit  4531 . For example, the bottom reflective member  4534  may change the irradiation direction of the laser light L irradiated in the horizontal direction to a vertical downward direction. For example, the bottom reflective member  4534  may change the irradiation direction of the laser light L to a direction toward the irradiation end  4535  to be described later. The laser light L refracted by the bottom reflective member  4534  may be transmitted to the substrate M to be treated or the monitoring target  491  to be described later through the irradiation end  4535  to be described later. 
     The bottom reflective member  4534  may be positioned to overlap a top reflective member  4548  (i.e., a top reflector) to be described later when viewed from above. The bottom reflective member  4534  may be disposed below the top reflective member  4548 . The bottom reflective member  4534  may be tilted at the same angle as the top reflective member  4548 . 
     The irradiation end  4535  may include a lens and a body tube. In an embodiment, the lens may be an objective lens. The body tube may be installed at the bottom end of the lens. The body tube may have a substantially cylindrical shape. The body tube may be inserted into an opening formed at a bottom end of the housing  4510 . The end of the body tube may be positioned to protrude from a bottom end of the housing  4510 . 
     The lens and the body tube may function as an irradiation end  4535  through which the laser light L is irradiated to the substrate M. The laser light L emitted by the laser unit  4530  may be emitted to the substrate M through the irradiation end  4535 . An image capture of the camera unit  4542  may be provided through the irradiation end  4535 . The light emitted by the lighting module  4544  may be provided through the irradiation end  4535 . 
     The imaging unit  4540  may image the laser light L emitted by the laser unit  4530 . The imaging unit  4540  may obtain an image, such as a video and/or a photograph, of a region in which the laser light L is irradiated from the laser module  4330 . The imaging unit  4540  may monitor the laser light L irradiated from the laser irradiation unit  4531 . 
     The imaging unit  4540  may monitor an information of the laser light L irradiated from the laser irradiation unit  4531 . For example, the imaging unit  4540  may monitor a diameter information of the laser light L. In addition, the imaging unit  4540  may monitor the center information of the laser light L. In addition, the imaging unit  4540  may monitor a profile information of the laser light L. The imaging unit  4540  may include a camera unit  4542 , a lighting unit  4544 , and the top reflective member  4548 . 
     The camera unit  4542  acquires an image of the laser light L irradiated from the laser irradiation unit  4531 . For example, the camera unit  4542  may obtain an image including a point at which the laser light L irradiated by the laser irradiation unit  4531  is irradiated. In addition, the camera unit  4542  acquires an image of the substrate M supported by the support unit  420 . In addition, the camera unit  4542  may obtain an image of the monitoring target  491  of the detection unit  490 , which will be described later. 
     The camera unit  4542  may be a camera. A direction in which the camera unit  4542  images to acquire an image may be directed toward a top reflective member  4548  to be described later. The camera unit  4542  may transmit an acquired image to the controller  30 . The camera unit  4542  may acquire an image in which the laser light L irradiated by the laser irradiation unit  4531  is displayed on the monitoring target  491 , and transmit the acquired image to the controller  30 . 
     The lighting unit  4544  may provide the light so that the camera unit  4542  may easily acquire an image. The lighting unit  4544  may include a lighting member  4545 , a first reflective plate  4546 , and a second reflective plate  4547 . The lighting member  4545  irradiates the light. The lighting member  4545  provides the light. The light provided by the lighting member  4545  may be sequentially reflected along the first reflective plate  4546  and the second reflective plate  4547 . The light provided by the lighting member  4545  may be reflected from the second reflective plate  4547  and irradiated in a direction toward the top reflective member  4548  to be described later. 
     The top reflective member  4548  may change the imaging direction of the camera unit  4542 . For example, the top reflective member  4548  may change the imaging direction of the camera unit  4542  which is the horizontal direction to the vertical downward direction. For example, the top reflective member  4548  may change the imaging direction of the camera unit  4542  to face the irradiation end  4535 . The top reflective member  4548  may change the irradiation direction of the light of the lighting member  4545 , which is sequentially transmitted through the first reflective plate  4546  and the second reflective plate  4547 , from the horizontal direction to the vertical downward direction. For example, the top reflective member  4548  may change the irradiation direction of light of the lighting unit  4544  to face the irradiation end  4535 . 
     The top reflective member  4548  and the bottom reflective member  4534  may be positioned to overlap when viewed from above. The top reflective member  4548  may be disposed above the bottom reflective member  4534 . The top reflective member  4548  and the bottom reflective member  4534  may be tilted at the same angle. The top reflection member  4548  and the bottom reflective member  4534  may have a coaxial axis if an irradiation direction of the laser light L irradiated from the laser irradiation unit  4531 , the imaging direction for acquiring an image by the camera unit  4542 , and the irradiation direction of light provided by the lighting unit  4544  are seen from above. 
     The purge gas supply unit  4550  may be installed inside the housing  4510 . The purge gas supply unit  4550  may be disposed in an installation space of the housing  4510 . The purge gas supply unit  4550  may include a purge gas supply source (not shown) and a purge gas supply line  4552 . 
     According to an embodiment, the purge gas supply source (not shown) may be positioned in an installation space of the housing  4510 . However, the present disclosure is not limited thereto, and the purge gas supply source (not shown) may be positioned outside the housing  4510 . The purge gas supply source (not shown) functions as a source for storing or/and supplying purge gas. An end of the purge gas supply line  4552  may be connected to the purge gas supply source (not shown), and the other end of the purge gas supply line  4552  may be connected to a purge port  4512  formed on the bottom surface of the housing  4510 . The purge gas flowing through the purge supply line  4552  may flow into the flow space of the flow cover  4580  to be described later through the purge port  4512 . 
       FIG.  8    schematically illustrates a cover and a flow cover viewed from above according to an embodiment of  FIG.  6   .  FIG.  9    schematically illustrates a dividing member according to an embodiment of  FIG.  6    as viewed from above. Hereinafter, a cover and a flow cover according to an embodiment of the present disclosure will be described in detail with reference to  FIG.  6    to  FIG.  9   . 
     The cover  4560  is positioned at a bottom end of the housing  4510 . The cover  4560  can be formed to downwardly protrude from the bottom end of the housing  4510  at a position corresponding to the irradiation end  4535  when viewed from above. The cover  4560  has an inner space. An end of the irradiation end  4535  may be positioned in the inner space of the cover  4560 . For example, a portion of the barrel  4537  may be positioned in the inner space of the cover  4560 . The cover  4560  may have a substantially cylindrical shape. 
     The cover  4560  may be integrally formed with the housing  4510  and the flow cover  4580  to be described later. However, inner space is not limited to this, and the housing  4510 , the cover  4560 , and the flow cover  4580  are respectively formed and can be combined by a physical or/and chemical method. Optionally, the cover  4560  and the flow cover  4580  may be integrally formed, and the housing  4510  may be physically or/and chemically coupled to the cover  4560  and the flow cover  4580 . 
     An opening is formed at a bottom end of the cover  4560 . The opening formed in the cover  4560  is formed at a position overlapping the laser light L irradiated from the irradiation end  4535  when viewed from above. For example, the opening is formed at a position overlapping the laser light L irradiated through the lens member  4535  when viewed from above. In addition, the opening is formed in a size that does not interfere with the laser light L irradiated from the irradiation end  4535 , the image capture of the camera unit  4542 , and the light of the lighting unit  4544 . 
     A supply port  4562  may be formed on a side surface of the cover  4560 . In an embodiment, as shown in  FIG.  8   , the supply port  4562  may be formed on a side of the cover  4560  corresponding to the central axis of the irradiation end  4535  based on the central axis of the irradiation end  4535  when viewed from above. The supply port  4562  may communicate with a flow space formed inside the flow cover  4580  to be described later. Accordingly, the purge gas supplied from the purge gas supply unit  4550  may be sequentially supplied to the purge port  4512 , the flow space of the flow cover  4580 , and the inner space of the cover  4560  through the supply port  4562 . 
     The dividing member  4570  may be installed in an inner space of the cover  4560 . The dividing member  4570  may divide the inner space of the cover  4560  into a top space and a bottom space. The top space of the dividing member  4570  may function as a buffer space. The buffer space may be provided as a space in which the purge gas supplied through the supply port  4562  temporarily remains. 
     Hereinafter, for convenience of explanation, a region adjacent a part at which the supply port  4562  is installed in the inner space of the cover  4560  is defined as a first region A, and a region facing the first region A in the inner space of the cover  4560  is defined as a second region B. 
     As shown in  FIG.  9   , the distribution unit  4590  may be formed in a ring shape. An outer circumferential surface of the dividing member  4570  may be in contact with the inner surface of the cover  4560 . An inner circumferential surface of the dividing member  4570  may be in contact with an outer surface of the irradiation end  4535 . 
     A first slit  4572  and a second slit  4574  may be formed in the dividing member  4570 . The first slit  4572  may be formed in an area corresponding to the first region A. The first slit  4572  may be provided as a slit penetrating from a top end to a bottom end of the dividing member  4570 . The first slit  4572  may be formed along a circumferential direction of the dividing member  4570 . The first slit  4572  may have a first opening area D 1 . 
     The second slit  4574  may be formed in a region corresponding to the second region B. The second slit  4574  may be provided as a slit penetrating the vertical direction of the dividing member  4570 . The second slit  4574  may be formed along the circumferential direction of the dividing member  4570 . The second slit  4574  may have a second opening area D 2 . The second opening area D 2  is provided relatively larger than the first opening area D 1 . 
     The dividing member  4570  may uniformly discharge the purge gas supplied to the inner space of the cover  4560  from the inner space. The purge gas supplied to the buffer space of the cover  4560  temporarily remains in the buffer space. The purge gas flowing in the buffer space passes through the first slit  4572  and the second slit  4574  formed in the dividing member  4570 . By forming the opening areas of the first slit  4572  and the second slit  4574  differently, an average flow rate of the purge gas passing through the first slit  4572  is smaller than an average flow rate of the purge gas passing through the second slit  4574 . Accordingly, the purge gas flowing in a bottom space of the inner space of the cover  4560  may be uniformly distributed. The purge gas having a uniform flow in the bottom space is uniformly emitted to the outside of the cover  4560  through an opening formed at a bottom end of the cover  4560 . 
     The flow cover  4580  may connect the cover  4560  and the housing  4510 . The flow cover  4580  may be coupled to a side surface of the cover  4560 . The flow cover  4580  may be coupled to extend in a lateral direction from the cover  4560 . The flow cover  4580  is positioned at a bottom end of the housing  4510 . The flow cover  4580  may connect the purge port  4512  and the supply port  4562 , respectively. The flow cover  4580  has a flow space through which purge gas flows. The flow cover  4580  may have the flow space through which the purge gas supplied from the purge port  4512  flows. Accordingly, the flow space of the flow cover  4580  may communicate with the purge port  4512  and the supply port  4562 . 
     The purge gas supplied from the gas supply line  4552  connected to the purge port  4512  flows in the flow space of the flow cover  4580 . The purge gas supplied from the purge port  4512  is supplied to the supply port  4562  through the flow space of the flow cover  4580 . The purge gas supplied to the supply port  4562  is supplied to the inner space of the cover  4560 . In an embodiment, the purge gas supplied to the supply port  4562  flows into the buffer space of the cover  4560 . The purge gas supplied to the buffer space passes through the first slit  4572  and the second slit  4574  formed in the dividing member  4570  and is uniformly discharged to the opening formed at the bottom end of the cover  4560 . 
     In general, if a liquid treatment process is performed on the substrate M or a heat treatment process is performed on the substrate M, a distance between the substrate M and the substrate treating apparatus  1  is positioned very close. Accordingly, the treating liquid which is splattered back from the substrate M during the process may be attached to the irradiating module  450 . In addition, particles such as a fume generated from the substrate M during the process may be attached to the irradiating module  450 . In particular, if droplets or/and particles are attached to the irradiation end  4535  to which various kinds of light are irradiated, the path or/and profile of the laser light L irradiated from the irradiating module  450  are changed. It makes it difficult to perform a precise etching process on the substrate M. 
       FIG.  10    schematically illustrates a state in which the purge gas flows inside the irradiating module of  FIG.  6   . Referring to  FIG.  8    and  FIG.  10   , the irradiating module  450  according to an embodiment of the present disclosure may provide a laser unit  4530  irradiating a laser light L, a camera unit  4542  for imaging an image, and a lighting unit  4544  provided to surround the housing  4510 , thereby firstly protecting the laser unit  452 , the camera unit  4542  for imaging an image, and the lighting unit  454  from an ink drop and/or particle generated during a process. 
     In addition, according to an embodiment of the present disclosure, the irradiation end  4535  in which the laser light L, the image capture, and the light are irradiated may be protected by the cover  4560 . An opening is formed at the bottom end of the cover  4560  so that laser light L irradiated from the irradiation end  4535 , the image capture, and the light irradiation are not interfered with, but the ink drop and/or the particle etc. which may be introduced into the opening may be supplied to the inner space of the cover  4560  so the irradiating module  450  may be secondly protected. 
     In addition, most of the purge gas supplied to the first region A in the inner space of the cover  4560  flows out of the opening along the sidewall of the opening adjacent to the first region A. Accordingly, the amount of purge gas flowing to the second region B in the inner space of the cover  4560  is relatively smaller than the amount of purge gas flowing in the area adjacent to the first region A. Accordingly, the supply of purge gas in the second region B of the inner space of the cover  4560  is not smoothly performed. Accordingly, particles and/or droplets generated during the process may be introduced from an opening adjacent to the second region B. 
     According to an embodiment of the present disclosure, opening areas of the first slit  4572  and the second slit  4574  installed in the inner space of the cover  4560  may be formed differently, so the particle and/or the ink drop generated from the process may be uniformly supplied to the second region B, which is a region facing the supply port  4562  to which the purge gas is supplied, as well as the first region A. 
       FIG.  11    schematically illustrates an embodiment of the detection unit and the support unit of  FIG.  4   .  FIG.  12    is a view of the detection unit of  FIG.  11    as viewed from above. Referring to  FIG.  11    and  FIG.  12   , the detection unit  490  can check whether an error occurs between the irradiation position of the laser light L and a preset target position TP. For example, the detection unit  490  may be provided in an inner space of the housing  410 . In addition, the detection unit  490  may be installed in a region area below the irradiation end  4535  if the irradiation end  4535  is in the aforementioned standby position. The detection unit  490  may include a monitoring target  491 , a plate  492 , and a support frame  493 . The plate  492  and the support frame  493  may be provided as a standby port providing a space in which the irradiation end  4535  stands by. The standby port is positioned at a standby position at which the irradiation end  4535  stands by. Accordingly, the plate  492  and the support frame  493  may be positioned at the standby position when viewed from above. 
     The monitoring target  491  may be referred to as a global coordinate system. A preset target position TP may be displayed on the monitoring target  491 . In addition, the monitoring target  491  may include a scale to confirm an error between the target position TP and the irradiation position at which the laser light L is irradiated. The monitoring target  491  may have an origin corresponding to the center of the irradiation end  4535  positioned above the standby port. The monitoring target  491  may have an origin corresponding to the center of the laser light L irradiated from the irradiation end  4535  positioned above the standby port. 
     The monitoring target  491  may be installed on the plate  492 . The plate  492  may be supported by the support frame  493 . A height of the monitoring target  491  determined by the plate  492  and the support frame  493  may be the same as that of the substrate M supported by the support unit  420 . For example, a height from the bottom surface of the housing  410  to the top surface of the monitoring target  491  may be the same as a height from the bottom surface of the housing  410  to the top surface of the substrate M supported by the support unit  420 . This is to match a height of the laser irradiation end  4535  and a height of the irradiation end  4535  when heating the substrate M when checking an error using the detection unit  490 . 
     If the irradiation direction of the laser light L irradiated from the irradiation end  4535  is slightly distorted with respect to the third direction Z, the monitoring target  491  may be provided at the same height as the substrate M supported by the support unit  420  because the irradiation position of the laser light L may differ according to the height of the irradiation end. 
     The substrate treating apparatus  1  according to an embodiment described below is provided mostly similar to the configuration of the substrate treating apparatus  1  according to the example described above, except for the case where additional description is provided. 
       FIG.  13    schematically illustrates a top view of another embodiment of the dividing member of  FIG.  6   . Referring to  FIG.  13   , the dividing member  4570  may be installed in an inner space of the cover  4560 . The dividing member  4570  may distribute the purge gas supplied to the inner space. The dividing member  4570  may distribute purge gas supplied in a direction of the inner space in the other direction opposite to the direction of the purge space. Hereinafter, for convenience of explanation, a region adjacent to the point at which the supply port  4562  is installed in the inner space of the cover  4560  is defined as a first region A, and a region opposite to the first region A in the inner space of the cover  4560  is defined as a second region B. 
     The dividing member  4570  may be formed in a ring shape. An outer circumferential surface of the dividing member  4570  may be in contact with the inner surface of the cover  4560 . An inner circumferential surface of the dividing member  4570  may be in contact with an outer surface of the irradiation end  4535 . 
     As shown in  FIG.  13   , a first hole H 1  and a second hole H 2  may be formed in the dividing member  4570 . A plurality of first holes H 1  and a plurality of second holes H 2  may be provided. The plurality of first holes H 1  may be formed in a region corresponding to the first region A. The first holes H 1  are provided as through holes penetrating from the top end to the bottom end of the dividing member  4570 . The first holes H 1  may be spaced apart from each other along the circumferential direction of the dividing member  4570 . The first holes H 1  may have different diameters. For example, as shown in  FIG.  13   , the first holes H 1  disposed at positions close to the first region A 1  among the first holes H 1  may have smaller diameters than the first holes H 1  disposed at positions far from the first region A 1 . 
     The second holes H 2  are provided as holes penetrating from the top end to the bottom end of the dividing member  4570 . The second holes H 2  may be spaced apart from each other along the circumferential direction of the dividing member  4570 . The second holes H 2  may have different diameters. For example, as shown in  FIG.  13   , the second holes H 2  disposed in a region adjacent to the supply port  4517  among the second holes H 2  may have a smaller diameter than the second holes H 2  disposed at a position relatively far from the supply port  4562 . An average diameter of the second holes H 2  may be provided smaller than an average diameter of the first holes H 1 . 
     According to an embodiment of the present disclosure, average diameters of the first holes H 1  and the second holes H 2  installed at the purge space are formed differently, so the particle and/or the ink drop generated from the process may be uniformly supplied to the second region B, which is a region facing the supply port  4562  to which the purge gas is supplied, as well as the first region A. 
     Unlike the above-described embodiment, the first holes H 1  may have the same diameter. In addition, the second holes H 2  may have the same diameter. The diameter of the first holes H 1  may be smaller than the diameter of the second holes H 2 . 
       FIG.  14    schematically illustrates a top view of another embodiment of the cover and the flow cover of  FIG.  6   .  FIG.  15    schematically illustrates a state in which a purge gas flows in the purge space of  FIG.  14   . Referring to  FIG.  14    and  FIG.  15   , a supply port  4562  may be formed on a side surface of the cover  4560 . In an embodiment, as shown in  FIG.  14   , the supply port  4562  may be installed at a position spaced apart from the central axis of the irradiation end  4535  based on the central axis of the irradiation end  4535  when viewed from above. The supply port  4562  may communicate with a flow space inside the flow cover  4580 . The purge gas flowing through the flow space of the flow cover  4580  through the supply port  4562  may be supplied to the inner space of the cover  4560 . Since the supply port  4562  is installed to be spaced apart from the central axis of the irradiation end  4535 , the purge gas supplied to the inner space of the cover  4560  may rotate and flow in the inner space as shown in  FIG.  15   . 
     According to an embodiment of the present disclosure, even if the supply port  4562  for supplying the purge gas is installed on a side of the cover  4560 , it flows by rotating in the inner space of the cover  4560  so that it can uniformly flow in a spiral direction in the inner space of the cover  4560 . Accordingly, it is possible to efficiently prevent particles or/and droplets generated during the process from flowing into the inner space of the cover  4560 . 
     In addition, since the purge gas rotates and flows in the inner space of the cover  4560 , the purge gas may flow toward a side of the opening formed at the bottom of the cover  4560 . Accordingly, the irradiating module  450  may be efficiently protected without causing a vibration in the liquid film previously formed on the substrate M or damaging the previously formed liquid film in the process of treating the substrate M. 
       FIG.  16    schematically illustrates a front view of another embodiment of the irradiating module of  FIG.  6   . Referring to  FIG.  16   , a cover plate  4590  may be installed on the cover  4560 . The cover plate  4590  may be made of a light-transmitting material. In addition, the cover plate  4590  may be formed of a transparent material. For example, the cover plate  4590  may cover an opening formed at the bottom end of the cover  4560 . The cover plate  4590  may seal an opening formed in the cover  4560 . The cover plate  4590  may seal the inner space of the irradiating module  450  by sealing the opening. Accordingly, it is possible to efficiently prevent a damage to the laser unit  4530 , camera unit  4542 , and lighting unit  4544  installed inside the housing  4510  from particles or/and droplets without affecting laser light L, image capture, and light irradiation emitted by the irradiating module  450 . 
     In embodiments of the present disclosure described above, the flow cover  4580  is provided, and the purge gas is supplied to the inner space of the cover  4560  through the flow space in the flow cover  4580 , but the present disclosure is not limited thereto. For example, the flow cover  4580  may not be provided, and the purge port  4512  may not be formed on the bottom surface of the housing  4510 . For example, the purge gas supply unit  4550  may directly supply the 4  purge gas to the inner space of the cover  4560 . 
     In the above-described embodiment of the present disclosure, an etching rate of the second pattern P 2  has been improved in the substrate M having a first pattern P 1 , which is a monitoring pattern for monitoring an exposing pattern, and a second pattern P 2 , which is a condition setting pattern for treating the substrate. However, unlike this, functions of the first pattern P 1  and the second pattern P 2  may be different from those of the embodiment of the present disclosure described above. In addition, according to the embodiment of inner space, only one of the first pattern P 1  and the second pattern P 2  is provided, and the etching rate of one of the first pattern P 1  and the second pattern P 2  can be improved. In addition, according to the embodiment of the present disclosure, the same can be applied when improving the etching rate of a specific area on the substrate such as a wafer or a glass other than a photo mask. 
     The effects of the inventive concept are not limited to the above-mentioned effects, and the unmentioned effects can be clearly understood by those skilled in the art to which the inventive concept pertains from the specification and the accompanying drawings. 
     Although the embodiment of the present disclosure has been illustrated and described until now, the present disclosure is not limited to the above-described specific embodiment, and it is noted that an ordinary person in the art, to which the inventive concept pertains, may be variously carry out the inventive concept without departing from the essence of the inventive concept claimed in the claims and the modifications should not be construed separately from the technical spirit or prospect of the inventive concept.