Abstract:
Embodiments of a semiconductor processing apparatus are disclosed. The semiconductor processing apparatus includes a micro chamber for tightly accommodating and processing a semiconductor wafer. The micro chamber includes an upper chamber portion defining an upper working surface and a lower chamber portion defining a lower working surface. The upper chamber portion and the lower chamber portion are relatively movable between an open position for loading and removing the semiconductor wafer and a closed position for tightly accommodating the semiconductor wafer. The semiconductor processing apparatus adopts a modified column device, a lower chamber portion and a balance correction device to achieve easy operation and maintenance, better prevention of chemical processing fluid leakage, and corrosion-resistant design.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is the U.S. national phase of the international application number PCT/CN2012/074053, filed on 14 Apr. 2012, which claims the priority benefit of China Patent Applications No. 201110094233.9. No. 201110094239.6. No. 201110094250.2 No. 201110094366.6 and No. 201110094306.4, all filed on 15 Apr. 2011. The above-identified applications are hereby incorporated by reference in their entirety. 
     
    
     TECHNICAL FIELD 
       [0002]    The present invention relates to the field of surface processing of semiconductor wafers or similar workpieces, and in particular to an apparatus for chemically processing the surface of a semiconductor wafer, as well as for cleaning, etching and other processing. 
       BACKGROUND 
       [0003]    Wafer is a carrier for producing integrated circuits. In actual production, the wafer to be prepared has an ultra-clean, flat surface, and the existing methods for preparing an ultra-clean wafer surface can be divided into two categories: wet processing such as immersion and spray techniques, and dry processing based on chemical vapor and plasma techniques. The wet processing is the method extensively adopted in the prior art, and it typically consists of a series of steps of immersing the wafer in or spraying the wafer with appropriate chemical solutions. 
         [0004]    There is an apparatus in the prior art that adopts wet processing for ultra-clean wafer processing. In the apparatus, a micro chamber for tightly accommodating and processing a semiconductor wafer is formed. The micro chamber may be either opened for loading and removing the semiconductor wafer, or closed for processing the semiconductor wafer, wherein chemical reagents and other fluids can be introduced into the micro chamber during processing. The open state and the closed state are achieved in such a manner that, upper and lower two working surfaces forming the micro chamber are respectively driven by two drive devices included in the apparatus to move relatively. 
         [0005]    But it is found in actual use that the above apparatus still has the following disadvantages: first, the structure that the upper and lower two working surfaces forming the micro chamber are respectively driven by the two drive devices in the apparatus is relatively complex, the same effect can also be achieved by applying a single drive device to drive the upper working surface or the lower working surface of the micro chamber; second, for the semiconductor wafers of different sizes, the corresponding micro chamber components of different sizes or different structures need to be replaced during processing, and it is extremely inconvenient to disassemble the whole component during replacement of the micro chamber component; third, when the micro chamber is not well sealed or leakage of chemical agents occurs in pipelines for their circulation, the relevant leakage collection mechanism in the apparatus is not perfect; and fourth, relative movement of the upper and lower two working surfaces is accomplished by a plurality of stainless metal columns that run through the upper and lower working surfaces, the columns are easily corroded by high temperature and/or corrosive gases generated during chemical processing, and accordingly become the source of metal pollution. Furthermore, the present components sleeved on the upper and lower working surface of the column are mutually welded together, so installation, debugging and disassembly of the apparatus are not easily operated, the manufacturing procedure is relatively complex, and implementation of process quality control is more difficult. 
         [0006]    Therefore, it is necessary to provide a new solution for the above problems. 
       SUMMARY 
       [0007]    An object of the present invention is to provide a semiconductor processing apparatus, which has a simpler structure, and is capable of replacing the micro chamber component more conveniently, setting the position of the micro chamber more flexibly, and collecting the leaked chemical processing fluids more safely and effectively. 
         [0008]    According to the object of the present invention, provided in the present invention is a semiconductor processing apparatus, which includes a micro chamber for tightly accommodating and processing a semiconductor wafer. The micro chamber includes an upper chamber portion defining an upper working surface and a lower chamber portion defining a lower working surface. The upper chamber portion and the lower chamber portion are relatively movable between an open position for loading and removing the semiconductor wafer and a closed position for tightly accommodating the semiconductor wafer. When the upper chamber portion or the lower chamber portion is in the closed position, the semiconductor wafer is disposed between the upper working surface and the lower working surface, and the inner wall of the micro chamber forms gaps for one or more fluids to flow, and the upper chamber portion and/or the lower chamber portion includes at least one inlet for the one or more fluids to enter into the micro chamber and at least one outlet for discharging the one or more fluids out of the micro chamber. 
         [0009]    In a preferred embodiment, the lower chamber portion includes a lower chamber plate defining the lower working surface and a lower box device receiving the lower chamber plate, the lower box device includes an uncovered cavity with a side opening, and through the side opening, the lower chamber plate can slide into or move out of the uncovered cavity. 
         [0010]    In another preferred embodiment, the surface of the uncovered cavity includes guiding grooves which lead the one or more fluids to eventually flow towards the same direction. The guiding grooves include a plurality of side-by-side slope surfaces positioned on the lower surface of the uncovered cavity and having the same tilt angle and tilt mode, and the bottoms of the slope surfaces are located at the side opening. 
         [0011]    In another preferred embodiment, the edges of the upper chamber portion and the lower chamber portion include corresponding column holes, and one of the upper chamber portion and the lower chamber portion is moveable between the open position and the closed position under the guidance of a column device running through the column holes. 
         [0012]    In another preferred embodiment, the semiconductor processing apparatus further includes a position correction device, which can adjust the pressures of the upper chamber plate to make the gap between each part of the working surface of the upper chamber portion and the semiconductor wafer meet the predetermined width. 
         [0013]    In another preferred embodiment, the column device includes a column and a sleeve sleeved on the outer surface of the column. The column has a threaded step-type structure, which makes it simple and flexible to accurately define the relative positions of the planes by cooperation of the nuts and the step. 
         [0014]    Compared with the prior art, the present invention has one or several of the advantages below: First, the semiconductor processing apparatus of the present invention can drive one of the upper working surface and the lower working surface by only one drive device, as a result, the semiconductor processing apparatus of the present invention is imparted with not only a simpler structure and better user&#39;s convenience in installation and disassembly is achieved, and meanwhile, the position and shape correction module of the present invention can be utilized to accomplish adjustments of the position of the micro chamber or the relative position between the upper chamber plate and the lower chamber plate. Second, the present invention adopts the drawable upper and lower box devices to correspondingly receive the upper and lower chamber plates, which makes it convenient and easy to replace the chamber plates of different sizes. Third, as an alternative, the bottom surface of the lower box device adopted by the present invention includes a plurality of side-by-side slope surfaces having the same tilt angle and tilt mode, which can collect the leaked chemical processing fluids or other fluids at one location or one side of the lower box device, therefore, only one sensor is needed for leakage monitoring. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0015]    The present invention will be better understood from the following detailed description when taken in conjunction with the reference drawings, in which like structural parts are identified with like reference symbols, wherein: 
           [0016]      FIG. 1  is a perspective view of the semiconductor processing apparatus according to one embodiment of the present invention; 
           [0017]      FIG. 2  is a front view of the semiconductor processing apparatus according to one embodiment of the present invention; 
           [0018]      FIG. 3  is a top view of the bottom plate according to one embodiment of the present invention; 
           [0019]      FIG. 4  is a perspective view of the first middle plate according to one embodiment of the present invention; 
           [0020]      FIG. 5  is a rear perspective view of the second middle plate of the present invention in one embodiment; 
           [0021]      FIG. 6  is a top view of the upper plate according to one embodiment of the present invention; 
           [0022]      FIG. 7  is a perspective view of the lower box device according to one embodiment of the present invention; 
           [0023]      FIG. 8  is an assembly view of the lower chamber plate and the lower box device according to one embodiment of the present invention; 
           [0024]      FIG. 9  is a rear perspective view of the insert component according to one embodiment of the present invention; 
           [0025]      FIG. 10  is a perspective view of the upper box device according to one embodiment of the present invention; 
           [0026]      FIG. 11  is a top view of the upper box device according to one embodiment of the present invention; 
           [0027]      FIG. 12  is a top view of the partition according to one embodiment of the present invention; 
           [0028]      FIG. 13  is a front view of the column according to one embodiment of the present invention; 
           [0029]      FIG. 14  is a cross-sectional view of the sleeve according to one embodiment of the present invention; 
           [0030]      FIG. 15  is a bottom view of the correction plate according to one embodiment of the present invention; 
           [0031]      FIG. 16  is a perspective view of the top plate according to one embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0032]    For better explicitness and understanding of the above object, features and advantages of the present invention, the present invention will be further described below in details in conjunction with the drawings and the embodiments. 
         [0033]    Refer to  FIG. 1  and  FIG. 2 , which separately illustrates a perspective view and a front view of the semiconductor processing apparatus of the present invention in an embodiment  100 . To put it simply, the semiconductor processing apparatus  100  includes a position correction device  110 , a micro chamber module  120 , a drive device  130  and a column device  140 . Each component of the first three modules is fixed, supported or guided by four parallel column devices  140 , along which there respectively are the drive device  130 , the micro chamber module  120  and the position correcting device  110  from bottom to top, wherein the micro chamber module  120  includes a micro chamber for processing a semiconductor wafer. The micro chamber includes an upper chamber plate  122  supported by an upper box device  124  and limited within the upper box device  124  by the position correction device  110  located above the upper box device  124 , and a lower chamber plate  126  supported by a lower box device  128 , and the lower box device  128  is supported and driven by the drive device  130  located below the lower box device  128 . 
         [0034]    The drive device  130  can drive the lower box device  128  to move relative to the upper box device  124  under the guidance of the column devices  140 , in order to open or close the upper box device  124  and the lower box device  128  when loading and removal of the semiconductor wafer are needed, namely open or close the micro chamber formed by the upper chamber plate  122  and the lower chamber plate  126 . When the micro chamber is closed, chemical agents and other fluids can be introduced into the micro chamber for chemical cleaning, etching and other processing on the semiconductor wafer within the micro chamber, and the chemical agents and other fluids are introduced out of the micro chamber at the end of the processing. 
         [0035]    For easiness in describing the present invention, firstly described is the drive device  130 , which, from bottom to top, sequentially includes a bottom plate  132 , a first middle plate  134  located above the bottom plate  132 , a second middle plate  136  located above the first middle plate  134  and an upper plate  138  located above the second middle plate  136 . A cavity, which is formed by the bottom plate  132 , the first middle plate  134 , the second middle plate  136  and the upper plate  138 , further internally includes a drive (not shown). When the drive gives an upward driving force, the second middle plate  136  and the upper plate  138 , under the guidance of the column device  140 , drive the lower box device  128  located above the upper plate  138  and the lower chamber plate  126  to move upwardly, so as to complete change of the micro chamber from an open state to a closed state. 
         [0036]      FIG. 3  is a top view of the bottom plate  132  in an embodiment  300 . The shape of the bottom plate  300  is square, the four corners of the bottom plate  300  include four column holes  302  relative to the column devices  140 , and by third nuts  153 , the four corners of the bottom plate  300  are fixed with hexagonal bottoms  141  (shown in  FIG. 2 ) of the column devices  140  located below the bottom plate  300 . The underside of the bottom plate  300  further includes ridges  304  located on the diagonal lines of the bottom plate  300 . The cross section of the ridge  304  is rectangular and the ridges  304  provide high intensity support for the bottom plate. Near the central portion of the bottom plate  300  is a circular perforation  306  and two screw thread perforations  308 . The circular perforation  306  is used for other equipment, pipelines or devices to pass through and the two screw thread perforations  308  can be used for fixation below the drive in combination with screws and other components. On the other hand, three side-by-side rectangular notches  309  are further formed on the four sides of the bottom plate  300  respectively. 
         [0037]      FIG. 4  is a perspective view of the first middle plate  134  in an embodiment  400 . The shape of the first middle plate  400  is also square and the four corners of the first middle plate  400  also include four column holes  402  relative to the column devices  140 , and together with the bottom plate  300 , the four corners of the first middle plate  400  are fixed, by the third nuts  153 , with the hexagonal bottoms  141  (shown in  FIG. 1 ) of the column devices  140  located below the bottom plate  300 . The upside of the first middle plate  400  extends perpendicularly to the plane of the first middle plate  400  to form a first circular cylinder wall  404 , the volume of which is slightly larger than that of the drive, in order to receive the drive. Near the central portion of the first middle portion  400  is a circular perforation  406  and two screw thread perforations  408  relative to the bottom plate  300 . The circular perforation  406  is used for other equipment, pipelines or devices to pass through and the two screw thread perforations  408  are used for fixation below the drive in combination with screws and other components. Three side-by-side rectangular perforations  309  are further formed on the four sides of the first middle plate  400  respectively. 
         [0038]      FIG. 5  is a rear perspective view of the second middle plate  136  in an embodiment  500 . The structure of the second middle plate  500  is substantially symmetrical with that of the first middle plate  400 . The four corners of the second middle plate  500  include four column holes  502  relative to the column devices  140 . The plate can move upwardly or downwardly under the guidance of the column devices  140 . The underside of the second middle plate  500  (i.e. the upside shown in the drawing) extends perpendicularly to the plane of the second middle plate  500  to form a second circular cylinder wall  504 , the volume of which is slightly larger than the size of the drive, in order to receive the drive. The diameter of the second cylinder wall  504  should be slightly greater than or slightly smaller than that of the first cylinder wall  404  of the first middle plate  400 , so that the second cylinder wall  504  can be received or embedded in the first cylinder wall  404  as the second middle plate  500  moves toward the first middle plate  400 . Near the central portion of the second middle plate  500  are two screw thread perforations  508 , which can be used for fixation above the drive in combination with screws and other components. Three side-by-side rectangular perforations  509  are further formed on the four sides of the second middle plate  500  respectively. 
         [0039]      FIG. 6  is a top view of the upper plate  138  in an embodiment  600 . The shape of the upper plate  600  is square in correspondence to the bottom plate  300  and the four corners of the upper plate  600  include four column holes  602  relative to the column devices  140 . The upper plate  600  can move upwardly or downwardly under the guidance of the column devices  140 . At the centre of the upper plate  600  are two side-by-side perforations  608 . The perforations  608  can be used for fixation above the drive in combination with screws and other components. Three side-by-side rectangular notches  609  are further formed on the four sides of the upper plate  600  respectively. 
         [0040]    In conclusion, a cylindrical cavity that is formed by the bottom plate  132 , the first middle plate  134 , the second middle plate  136  and the upper plate  138  can receive a drive therein. The drive is a mature product in the prior art, e.g. pneumatic drive; similarly, other drives, such as mechanical drive, electric drive or hydraulic drive, can also be adopted. However, it shall be realized that, when the drive gives an upward driving force, the second middle plate  136  and the upper plate  138  are driven by the driving force of the drive to move upwardly; and when the drive gives a downward driving force, the second middle plate  136  and the upper plate  138  are driven by the driving force of the drive and own gravity to move downwardly. 
         [0041]    It can be easily thought of that, in another embodiment, the bottom plate  132  and the first middle plate  134  can be integrally formed as one bottom plate; the second middle plate  136  and the upper plate  138  can be combined into one top plate. That is to say, the drive device  130  is not limited to the embodiments described above, but to any other embodiments that could reach identical or better effects. 
         [0042]    Described next is the micro chamber module  120  as shown in  FIG. 1  and  FIG. 2 . The micro chamber module  120  sequentially includes, from bottom to top, a lower box device  128 , a lower chamber plate  126  supported by the lower box device  128 , a partition  125 , an upper box device  124  located above the partition  125  and an upper chamber plate  122  supported by the upper box device  124 . The lower box device  128  and the lower chamber plate  126  supported by the lower box device  128  can be driven by the drive device  130  to move upwardly or downwardly under the guidance of the column devices  140 . The partition  125 , the upper box device  124  located above the partition  125  and the upper chamber plate  122  supported by the upper box device  124  are usually motionless, only the position and shape of the micro chamber can be slightly adjusted by the position correction device  110 , which will be hereinafter described in details. After the lower box device  128  and the lower chamber plate  126  supported by the lower box device  128  are driven by the drive device  130  to move upwardly under the guidance of the column devices  140  and then closed with the upper chamber plate  122  and the upper box device  124 , the micro chamber is formed. 
         [0043]      FIG. 7  is a perspective view of the lower box device  128  in an embodiment  700 . The lower box device  700  is substantially in the shape of an uncovered box with a square bottom surface. The four corners of the lower box device  700  include four column holes  702  relative to the column devices  140 . Three side-by-side slope surfaces  704  with the same tilt angle, tilt mode and width are arranged on one surface of the lower box device  700  relative to the upper box device  124 , such a design of the bottom surface including the slope surfaces is employed for collecting chemical agents or other fluids leaked from the lower chamber plate located above the bottom surface. Through the above slope surfaces, chemical agents or other fluids can finally flow to the bottoms of the slope surfaces  704 . When the leaked chemical processing fluids or other fluids come into contact with sensors for liquids or other fluids arranged on the slope bottoms, the sensors give an alarm signal, meanwhile, a series of protection measures are initiated according to the predesigned scheme to avoid leakage expansion and ensure the safety of equipment and operating staff. Then, the leaked fluids can be collected by guiding grooves, holes, pipelines or storage boxes connected to the slope bottoms of the slope surfaces  704 . 
         [0044]    Meanwhile, it shall be appreciated that the box wall portion the slope bottoms of the odd slope surfaces  704  face is missing, and the inner wall portions where three other box walls  706  come into contact with the bottom surface  701  are recessed in the horizontal direction to form grooves  707 . Through the missing box wall portion, the lower chamber plate  126  can horizontally slide into the lower box device  700  along the grooves  707  on the other box walls  706  and then be supported by the bottom surface  701 . Likewise, the lower chamber plate  126 , when located within the lower box device  700 , can also slide out of the lower box device  700  along the grooves  707  through the missing box wall portion. Rectangular notches  708  are further formed on the four sides of the lower box device  700  respectively. 
         [0045]    Refer to  FIG. 8 , which illustrates an assembly view of the lower chamber plate  126  and the lower box device  700  in an embodiment  800 . The lower chamber plate  800  is typically integrally formed. The lower chamber plate  800  includes a lower portion  820  and an upper portion  840  located above the lower portion  820 . The size and the edge thickness of the lower portion  820  correspond to the distance between the box walls  706  of the lower box device  700  and to the width of the groove  707  respectively, so that the lower chamber plate  800  can slide along the grooves  707  on the box walls  706  of the lower box device  700 . The upper surface  842  of the upper portion  840  serves as the lower working surface of the micro chamber. 
         [0046]    It shall be appreciated that, it is very convenient to load and remove the lower chamber plate  800  since the lower chamber plate  800  slides in or out in a drawable manner. There are different semiconductor wafer sizes, such as 4 inches, 6 inches, 8 inches, 12 inches, etc., furthermore, for better processing effects, there is a need to design different interior structures of the micro chamber according to different processing technologies, for example, the micro chamber for cleaning the patterned wafer surface or the micro chamber for cleaning the chemically-mechanically polished wafer surface. Therefore, if needed, the lower chamber plate can be replaced by a matching one according to either different wafer sizes or process requirements. Simultaneously, when the lower chamber plate  800  slides into the lower box device  700 , an insert component  160  (shown in  FIG. 1 ) can also be utilized to engage the lower chamber plate  800  in the lower box device  700 .  FIG. 9  illustrates a rear perspective view of the insert component  160  in an embodiment  900 . The two sides of the insert component  900  include convex ribs  902  relative to the grooves  707  of the lower box device  700 . The bottom of the insert component  900 , i.e. the upside shown in the drawing, includes bulges  904  relative to the even slope surfaces and pits  906  relative to the odd slope surfaces, thus the insert component  900  is corresponding to the bottom structure of the lower box device  700 . The insert component  900  further includes stop blocks  908  located above the bottom surface. When the insert component  900  is engaged in the lower box device  700 , the stop blocks  908  can be engaged with the wall which corresponds to the slope bottoms of the slope surfaces  704  of the lower box device  700 , in order to prevent the insert component  900  from falling off the lower box device  700 . When there is a need to remove the insert component  900 , the insert component  900  can be lifted up at first until it is drawn out of the lower box device  700 . Obviously, the lower chamber plate  800  can be fixed within the lower box device  700  by means of the fixation effect from the insert component  900 . 
         [0047]    The upper chamber plate  122  basically has a structure that is substantially symmetrical with the lower chamber plate  800 . The upper chamber plate  122  includes a square upper portion and a disk-shaped lower portion. Since those skilled in this art can easily think of the structure of the upper chamber plate  122  from  FIG. 8 , the relevant drawings of the upper chamber plate  122  are omitted herein. Obviously, the side length of the square upper portion of the upper chamber plate  122  and the diameter of the disk-shaped lower portion can be the same as or close to those of the lower chamber plate  800 , and the lower surface of the lower portion serves as the upper working surface of the micro chamber. It shall be appreciated that, when the upper working surface of the lower chamber plate  800  and the lower working surface of the upper chamber plate are closed or closely attached, a cavity for receiving the semiconductor wafer is formed therein.  FIG. 10  and  FIG. 11  respectively illustrate a perspective view and a top view of the upper box device  124  in an embodiment  1000 . The upper box device  1000  is substantially in the shape of an uncovered box with a square bottom. The four corners of the upper box device  1000  respectively include four column holes  1020  relative to the column devices  140 . At the central portion of the bottom of the upper box device  1000  is a circular cavity  1040  slightly larger than the lower portion of the upper chamber plate. The circular cavity  1040  includes a circumferential convex rib  1042  downwardly extending out of the bottom. And a structure capable of tightly accommodating the upper chamber plate  122  is formed by a box-shaped space that includes three box walls  1060  and is matched with the upper portion of the upper chamber plate  122 . Through this structure, the upper chamber plate  122  can be steadily supported by the upper box device  1000 . In addition, the structure of the upper box device  1000  with no box wall at one side also makes it convenient to replace the upper chamber plate  122 . Likewise, if needed, the upper chamber plate  122  can be replaced by a matching one according to either different wafer sizes or process requirements, and the specific replacement procedure will be described below in details. 
         [0048]      FIG. 12  is a top view of the partition  125  in an embodiment  1200 . The shape of the partition  1200  is square and the four corners of the partition  1200  include four column holes  1220  relative to the column devices  140 . At the central portion of the partition  1200  is a circular notch  1240  capable of tightly accommodating the circumferential convex rib  1042  of the upper box device  1000 . The primary function of the partition  1200  is to support the upper box device  1000  located above the partition  1200  and the upper chamber plate  122  received within the upper box device  1000 . Rectangular notches  1260  are further formed on the four sides of the partition  1200  respectively, and can be utilized to receive pipelines and install other components, such as valves, flow controllers and sensors. In one embodiment, the partition  1200  can be made of a stainless steel material. 
         [0049]    For further description of the position relation between each of the above plates and the column device  140 , refer to  FIG. 13  and  FIG. 14  at first, which respectively illustrate a front view and a cross-sectional view of the column and the corresponding sleeve included in the column device  140  in an embodiment  1300 . The column  1320  includes a cylindrical upper portion  1321  with the smallest diameter, a cylindrical first middle portion  1323  with the smaller diameter, a cylindrical second middle portion  1325  with the larger diameter, and a bottom  1327  having a hexagonal section ( 141  shown in  FIG. 2 ). The outer surface on the top of the upper portion  1321  further includes a first screw thread with the predetermined length (not shown). The outer surface of the end, near the upper portion  1321 , of the first middle portion  1323  further includes a second screw thread with the predetermined length (not shown). The outer surface of one end, near the hexagonal bottom  1327 , of the second middle portion  1325  further includes a third screw thread with the predetermined length (not shown). The internal diameter r of the sleeve  1340  is slightly larger than or equal to the diameter of the second middle portion  1325  of the column  1320 . In case that the sleeve  1340  is sleeved on the column  1320 , that is, the column  140  is assembled, refer to  FIG. 1  and  FIG. 2  together. After the sleeve  1340  and the column  1320  are assembled, the internal diameter or the shortest distance of the cross section of the column device  140  decreases successively from bottom to top, that is, the shortest distance of the section of the bottom  1327 &gt;the external diameter R of the sleeve  1340 &gt;the internal diameter r of the sleeve  1340 &gt;the external diameter of the second middle portion  1325 &gt;the external diameter of the first middle portion  1323 &gt;the external diameter of the upper portion  1321 . In one embodiment, the first middle plate  134  and the bottom plate  132  can also be installed above the bottom  1327  of the column; the internal diameter of the column holes on the first middle plate  134  and the bottom plate  132  is slightly larger than the external diameter of the second middle portion  1325  of the column  1320 ; and by the third nuts  153  relative to the third screw threads, the first middle plate  134  and the bottom plate can be fixed between the third nuts  153  and the bottom  1327  of the column. The internal diameter of the column holes of the second middle plate  136 , the upper plate  138  and the lower box device  128  is slightly larger than the external diameter of the sleeve  1340 , that is to say, the column holes of the second middle plate  136 , the upper plate  138  and the lower box device  128  can receive the sleeve  1340  and the second middle portion  1325  located within the sleeve  1340 , and the height of the lower box device  128  does not exceed the upper edge of the second middle portion  1325  or the sleeve  1340 , in this case, the second middle plate  136 , the upper plate  138  and the lower box device  128  can be driven by the drive to move up and down along the sleeve  1340  and the second middle portion  1325  located within the sleeve  1340 . By the second nuts  152  relative to the second screw threads, the partition  125  and the upper box device  124  can be fixed between the second nuts  152  and the upper edge of the second middle portion  1325  or the sleeve  1340 . The internal diameter of the column holes of the partition  125  and the upper box device  124  is slightly larger than the diameter of the first middle portion  1323 , but not larger than the external diameter of the second middle portion  1325 . That is to say, the lower surface of the partition  125  does not move downwardly as being supported by the second middle portion  1325  and the upper edge of the sleeve  1340 . 
         [0050]    Referring to  FIG. 1  and  FIG. 2 , the position correction device  110  includes a correction plate  114  located above the upper chamber plate  122  and a top plate  112  located above the correction plate  114 . The internal diameter of the column holes on the four corners of the top plate  112  is slightly larger than the diameter of the upper portion  1321  of the column and smaller than the diameter of the first middle portion  1323 , therefore, the top plate  112  can be fixed between the first nuts  151  and the upper edge of the first middle portion  1323  by the first nuts  151  relative to the first screw threads. 
         [0051]    Particularly, the column  1320  can be made of metals or alloys by cutting and casting, and the sleeve  1340  can be made of corrosion-resistant and high-temperature-resistant materials, such as plastics. 
         [0052]    For further description of the position correction device  110 , refer to  FIG. 15  and  FIG. 16 .  FIG. 15  is a bottom view of the correction plate  114  of the present invention in an embodiment  1500 . The correction plate  1500  is a flat plate, which is similar to the upper portion of the upper chamber plate  122  in size. The correction plate  1500  can be pressed on the upper portion of the upper chamber plate  122 . 
         [0053]      FIG. 16  is a perspective view of the top plate  112  of the present invention in an embodiment  1600 . The four corners of the top plate  1600  include column holes  1620 , the internal diameter of which is slightly larger than the diameter of the upper portion  1321  of the column and smaller than the diameter of the first middle portion  1323 . By the first nuts  151  relative to the first screw threads, the top plate  1600  can be fixed between the first nuts  151  and the upper edge of the first middle portion  1323  of the column. A plurality of threaded holes  1640  with the same internal diameter are further formed on the diagonal lines and the mid-point connection lines of the opposite sides of the top plate  1600 . It can be seen from  FIG. 2  that, after the bolts  154  relative to the threaded holes  1640  are screwed into the top plate  1600 , the distal ends of the bolts  154  can exert pressures on the parts of the correction plate  114  located below the top plate  1600 . That is to say, the bolts  154  with different screwed widths at different screwed positions can be used to exert different pressures on different parts of the correction plate  1500 . Through certain measurement methods, the pressure generated below the correction plate  1500  not only causes the upper chamber plate  122  to be closely received in the upper box device  124 , but also imparts the lower working surface of the upper chamber plate  122  with an appropriate shape. That is to say, the gaps between the lower working surface of the upper chamber plate  122  and the semiconductor wafer to be processed are adjusted by the pressure provided by the correction plate  1500  to accord with the process requirements. The middle portions of the four sides of the top plate  1600  all include elongated bar-shaped perforations  1660  for receiving pipelines or installing other components. The top plate  1600  further includes reinforcing ribs  1680 , wherein a part of the threaded holes  1640  are located on the reinforced ribs  1680 . 
         [0054]    In conclusion, the position correction device  110  can put the lower surface of the micro chamber plate  122  under an appropriate fixed state, and the drive device  130  can make the upper surface of the lower chamber plate  126  move downwardly or upwardly, so that the micro chamber formed by the lower surface of the upper chamber plate  122  and the upper surface of the lower chamber plate  126  is under an open or closed state. Certainly, in order to obtain a sealed micro chamber, the lower surface of the upper chamber plate  122  and the upper surface of the lower chamber plate  126  may adopt corresponding jointing or coupling structures. The joints of the upper chamber plate  122 , the upper box device  124 , the lower chamber plate  126  and the lower box device  128  can also employ sealing components such as rubber-made O sealing ring, etc. Meanwhile, in order to allow chemical agents or other fluids to enter into and be discharged out of the micro chamber, the upper chamber plate  122  and the lower chamber plate  126  should further have inlet and outlet structures, such as hollow micro pipes and guiding grooves. For instance, when a semiconductor wafer needs to be located within the micro chamber, a gap for circulation of the chemical agents is formed between the semiconductor wafer and the inner wall of the micro chamber, and the predetermined width of the gap is usually in the range from 0.01 mm to 10 mm. The above parts that are not described in details herein are all familiar to those skilled in this art and therefore not repeatedly described herein. 
         [0055]    In one specific embodiment, when the semiconductor processing apparatus  100  of the present invention is used to process a semiconductor wafer, the processing procedure can be substantially divided into several parts below: replacement of the chamber plate, position correction and chemical processing. 
         [0056]    During replacement of the chamber plate, the chamber plate can be replaced by a matching one according to the size of the semiconductor wafer to be processed or the process requirements. Replacement of the lower chamber plate  126  is as follows: at first, the drive gives a downward driving force to lower the lower box device  128  and the lower chamber plate  126 , then the insert component  160  is opened or pulled out, and the old lower chamber plate  126  is taken out by sliding it along the guiding grooves of the lower box device  128 . The new proper lower chamber plate  126  is installed in by sliding it along the guiding grooves of the lower box device  128 , and the insert component  160  is installed to fix the lower chamber plate  126  within the lower box device  128 . 
         [0057]    Replacement of the upper chamber plate  122  is as follows: the drive gives a downward driving force to lower the lower box device  128  and the upper chamber plate  126 , all the bolts  154  are screwed off so that the bolts  154  are no longer pushed against the correction plate  114 , afterwards, the correction plate  114  is removed, the old upper chamber plate  122  is lifted up from the inside of the upper box device  124 , the upper chamber plate  122  is taken out, the new upper chamber plate  122  is put in the upper box device  124 , the correction plate  114  is arranged above the new upper chamber plate  122 , and finally, the correction plate  114  is fixed and adjusted by the bolts  154  to complete correction or adjustment of the new upper chamber plate  122 . 
         [0058]    During position correction, the position of the upper chamber plate  122  relative to the lower chamber plate can be corrected. First, the second nuts  152  above the four corners of the upper box device  124  can be adjusted to exert appropriate pressures on the four corners of the upper box device  124 , thus preliminarily adjusting the position of the upper chamber plate  122 . Then, the existing horizontal measuring device is utilized or the micro chamber under the closed state is observed, pressure distribution on the correction plate  114  can be accurately adjusted by adjustment of the plurality of bolts  154  installed on the top plate  112  according to the measurement result or the observation result, so that the upper chamber plate  122  is under a state which meets the process requirements. Certainly, in some embodiments, the upper chamber plate  122  probably needs to be adjusted to be at a certain tilt angle, in order to facilitate corresponding processing of the semiconductor wafer, in this case, the adjustment way of the upper chamber plate  122  could be easily thought of from the foregoing description. 
         [0059]    During chemical processing, the drive device  130  is utilized at first to close the micro chamber, and then chemical agents or other fluids are introduced into the micro chamber through hollow micro pipes within the upper chamber plate  122 , in order to perform processing on the semiconductor wafer inside, such as analysis and etching, afterwards, by the pressure or suction inside, such as gas transportation or generation, the chemical agents or other fluids are driven in vacuum to be discharged out through the structures like hollow micro pipes or guiding grooves within the lower chamber plate  126 . The contents of this part are familiar to those skilled in this art. Particularly, the structures like hollow micro pipes and guiding grooves need to be taken into account in designing the upper chamber plate  122  and the lower chamber plate  126 , the upper chamber plate  122  and the lower chamber plate  126  may have multiple variations and more complex structures according to specific embodiments and do not completely correspond to the descriptions of the upper chamber plate  122  and the lower chamber plate  126  herein, thus, the differences relevant to this shall not be considered as a factor for limiting the scope of the present invention. 
         [0060]    One of the advantages and essentials of the present invention is that: typically adopted in such semiconductor processing apparatuses in the prior art is a structure that an upper drive device and a lower drive device are used for driving the upper chamber plate  122  and the lower chamber plate  126  respectively. However, adopted in the present invention is the position correction device  111  for replacing the drive device located at the upper portion in the prior art, which not only achieves a simpler structure of the present invention, but also facilitates the operations of a user. 
         [0061]    Another advantage and essential of the present invention is that: if the semiconductor wafers to be processed have different sizes or there are different process requirements in such semiconductor processing apparatuses in the prior art, the whole component needs to be completely disassembled to replace the upper chamber plate  122  and the lower chamber plate  126  by matching ones. However, adopted in the present invention is a drawable lower box device  128  and a matching insert component  160 , so that the lower chamber plate  126  can be loaded and removed conveniently. Replacement can be achieved just by the steps of: pulling out the old lower chamber plate  126  by sliding it along the guiding grooves of the lower box device  128 , replacing it by a new lower chamber plate  126  having a proper size, sliding the new lower chamber plate  126  into the lower box device  128 , and finally fixing the lower chamber plate  126  by the insert component  160 . Similarly, after the bolts  154  and the correction plate  114  are disassembled, replacement of the upper chamber plate  122  can be carried out in a simple and convenient way. 
         [0062]    Still another advantage and essential of the present invention is that: in such semiconductor processing apparatuses in the prior art, if the micro chamber is not tightly closed or properly sealed and the phenomena like leakage occurs in the micro pipes within the lower chamber plate during chemical processing, chemical agents or other fluids are likely to leak into the lower box device and are further likely to overflow the whole semiconductor apparatus. However, the bottom surface of the lower box device  128 , adopted in the present invention, includes three side-by-side slope surfaces with the same tilt angle, tilt mode and width. Through the structure similar to that described in  FIG. 7 , the lower box device  128  can collect the leaked chemical agents at one side or one location of the bottoms of the slope surfaces  704 , the chemical agents collected can be easily and timely detected by the sensors arranged at the slope bottoms, and the sensors give a signal in time to initiate the measures for continuous leakage prevention. And the leaked chemical agents are collected through the structures such as guiding grooves, pipelines and storage boxes, in order to avoid the chemical agents flowing outwards to reach the other parts of the apparatus to result in corrosion and contamination. 
         [0063]    Still another advantage and essential of the present invention is that: in such semiconductor processing apparatuses in the prior art, the components of the column device  140  are typically made of integrally-formed metals by casting, on the one hand, the chemical processing fluids within the micro chamber sometimes generate corrosive and/or high-temperature gases during chemical processing, these corrosive gases will corrode the column devices when coming into contact with the metal column surfaces, on the other hand, the lower box device causes minor abrasion to the column devices while ascending and descending, so as to produce pollutant particles containing metal components. However, the column device  140  adopted in the present invention employs a structure of combining the column  1320  with the sleeve  1340 , wherein the column  1320  can be made of integrally-formed metals by cutting or casting, and the sleeve  1340  can be made of corrosion-resistant and high-temperature-resistant materials such as plastics. Even if the column device  140  is abraded or corroded, only the sleeve  1340  needs to be replaced. 
         [0064]    Meanwhile, it could be easily thought of from the description herein that, the upper chamber plate  122 , the upper box device  124 , the lower chamber plate  126  and the lower box device  128  that are possibly in direct contact with the chemical agents or other fluids should be made of corrosion-resistant and high-temperature-resistant materials, and other components can all be made of integrally-formed metals by cutting or casting. 
         [0065]    On the other hand, the column  1320  is provided with a multi-step-shaped cylindrical column body and bolt holes, and other components can be fixed and engaged on the column device  140  very conveniently only by the corresponding screws and bolts. 
         [0066]    The embodiments of the present invention have been fully disclosed in the foregoing description. It shall be noted that, any modifications made to the embodiments of the present invention by those skilled who are familiar with this art do not depart from the scope of the claims in the present invention. Accordingly, the scope of the claims in the present invention is not limited to the aforementioned embodiments.