Abstract:
A plasma reactor having multi discharging tubes is disclosed, through which activated gas containing ion, free radical, atom and molecule is generated through plasma discharging, and different process gases are injected into multi discharging tubes in which solid, power and gas, etc., are plasma-treated with the activated gas to perform processes including cleaning process for semiconductor, and a plasma state can be maintained even at low power.

Description:
PRIORITY 
       [0001]    This application claims the benefit under 35 U.S.C. §119(a) the benefit of Korean Patent Application No. 10-2012-0040198 filed on Apr. 18, 2012, Korean Patent Application No. 10-2012-0040197 filed on Apr. 18, 2012 and Korean Patent Application No. 10-2012-0148032 filed on Dec. 18, 2012, the entire contents of which are incorporated herein by reference 
       BACKGROUND 
       [0002]    (a) Technical Field 
         [0003]    The present invention relates to a plasma reactor having multi discharging tubes, and more particularly, to a plasma reactor having multi discharging tubes through which activated gas containing ion, free radical, atom and molecule is generated through plasma discharging, and different process gases are injected into multi discharging tubes in which solid, power and gas, etc., are plasma-treated with the activated gas to perform processes including cleaning process for semiconductor, and a plasma state can be maintained even at low power. 
         [0004]    (b) Background Art 
         [0005]    Generally, a plasma discharging has been used for exciting gas to generate activated gas containing ion, free radical, atom and molecule. The activated gas is used widely in various fields, representatively in semiconductor manufacturing process, for example etching, deposition, cleaning and ashing, etc. 
         [0006]    Recently, wafer or LCD glass substrate for manufacturing semiconductor device has become much larger, and thus it is requested a plasma source which has a higher control ability of plasma ion energy, a treatment ability of a large area and easy expandability. 
         [0007]    Further, it has been known that remote plasma is used efficiently for manufacturing semiconductor by using plasma. For example, the remote plasma is used for cleaning a process chamber or ashing to strip photo-resist. 
         [0008]    The remote plasma reactor (or called as a remote plasma generator) may use a Transformer Coupled Plasma Source (TCPS) or an Inductively Coupled Plasma Source (ICPS). 
         [0009]    The remote plasma reactor using the transformer coupled plasma source has a reactor body of a toroidal structure to which a magnetic core provided with a first wound coil is equipped. The remote plasma reactor using the inductively coupled plasma source has a reactor body of a hollow tube structure to which an inductively coupled antenna is equipped. 
         [0010]    However, in case of the remote plasma reactor using the transformer coupled plasma source, it is operated at a comparatively high voltage environment due to its characteristics and thus it is extremely difficult to ignite plasma or maintain the ignited plasma at a low voltage environment. 
         [0011]    Further, in case of the remote plasma reactor using the inductively coupled plasma source, it can be operated at a comparatively low voltage environment due to its characteristics whereas a supply power has to be increased for operating the remote plasma reactor and in this case the inside of the reactor body may be damaged due to ion impact. 
         [0012]    In addition, a remote plasma reactor that is operated efficiently at a high or low voltage is required in accordance to various demands requested from semiconductor manufacturing process; however, a prior remote plasma reactor adapting one of the transformer coupled plasma source or the inductively coupled plasma source is not appropriately responded to the demands. 
         [0013]    Furthermore, as the process target-substrate becomes large, the process chamber becomes large and thus a plasma source that can supply sufficiently and remotely high density activated gas is demanded. 
         [0014]    Meanwhile, a substrate treating system is provided, in which two or more process chambers are provided in parallel in order to treat two or more process target-substrates in parallel for increasing production efficiency of a semiconductor device. At this time, when the remotely activated ion gas is supplied to two or more process chambers, plasma reactors have been equipped separately to the respective process chambers. However, in this case, equipment cost is increased and operation cost becomes high. 
         [0015]    However, when single plasma reactor is used for supplying the activated ion gas to two or more process chambers, a plasma reactor of a large capacity has to be used but ionized gas of a large capacity is difficult to be generated and supplied by using an existing plasma reactor. 
         [0016]    Further, the different kinds of process gases are ionized more efficiently by separating them than by mixing them in accordance to the semiconductor manufacturing process; however, it is difficult to perform it in a single process chamber. 
         [0017]    Meanwhile, the existing plasma reactor, specially the transformer coupled plasma source has a problem that power greater than a predetermined level (for example, 3 kw) has to be supplied to maintain plasma and when the power becomes to the predetermined level or less, the plasma cannot be maintained. 
       SUMMARY OF THE DISCLOSURE 
       [0018]    The present invention has been made in an effort to solve the above-described problems associated with prior art. An object of the present invention is to provide a plasma reactor having multi discharging tubes, capable of supplying sufficiently and remotely the activated gas of a large capacity and a high density. 
         [0019]    Another object of the present invention is to provide a plasma reactor having multi discharging tubes of a hybrid type to have a wide operational region from a low voltage region to a high voltage region by installing integrally the inductively coupled plasma source or the capacitively coupled plasma source, in addition to the transformer coupled plasma source. 
         [0020]    Another object of the present invention is to provide a plasma reactor having multi discharging tubes, capable of providing two or more separated plasma discharging channels and generating independently ionized activated gas at the respective discharging channels to supply it to a process chamber. 
         [0021]    Further, another object of the present invention is to provide a plasma reactor having multi discharging tubes, capable of operating efficiently two plasma sources with one power supply and driving alternatively one source in a combined configuration of the transformer coupled plasma source and other plasma sources or the combined source. 
         [0022]    Additionally, another object of the present invention is to provide a plasma reactor having multi discharging tubes, capable of injecting different process gases into the multi discharging tubes of the plasma reactor of the present invention to perform processes including a cleaning process for semiconductor. 
         [0023]    Another object of the present invention is to provide a plasma reactor having multi discharging tubes, capable of maintaining a plasma state even at a low power. 
         [0024]    A plasma reactor having multi discharging tubes including: an upper hollow discharging tube having a gas inlet; a lower hollow discharging tube having a gas exit; a plurality of discharging tube bridges wherein an upper part and a lower part of each discharging tube bridge are coupled between the upper discharging tube and the lower discharging tube; a transformer coupled plasma source that is equipped on the discharging tube bridge and has a magnetic core on which a first winding coil is wound; and a AC switching power supply for supplying plasma generation power to the first winding coil. 
         [0025]    The plasma reactor having multi discharging tubes further includes an inductively coupled plasma source having a dielectric flat window that is equipped to an upper opening formed a part of the upper discharging tube and an inductive antenna flat coil that is arranged adjacently to the dielectric flat window wherein the inductive antenna flat coil and the first winding coil are coupled to the AC switching power supply in parallel or in series. 
         [0026]    The plasma reactor having multi discharging tubes further includes an inductively coupled plasma source having a dielectric tube that is arranged to be protruded upwardly to an upper discharging tube opening formed a part of the upper discharging tube and an inductive antenna that is wound on the dielectric tube wherein the inductive antenna and the first winding coil are coupled to the AC switching power supply in parallel or in series. 
         [0027]    The plasma reactor having multi discharging tubes further includes a capacitively couples plasma source provided with capacitively coupled electrodes to be equipped to at least two upper discharging tube openings formed at a part of the upper discharging tube wherein the capacitively coupled electrodes and the first winding coil are coupled to the AC switching power supply in parallel or in series. 
         [0028]    At least two gas exits of the lower discharging tube are provided wherein the gas in-flowed through the gas inlet and the discharging channel via the upper discharging tube, the lower discharging tube and the plurality of discharging tube bridges is activated by a plasma-discharging, distributed and supplied by the gas exits to at least two process chambers. 
         [0029]    The plasma reactor having multi discharging tubes further includes an inductively coupled plasma source provided with a dielectric flat window that is equipped to an upper opening formed a part of the upper discharging tube and an inductive antenna flat coil that is arranged adjacently to the dielectric flat window wherein the inductive antenna flat coil and the first winding coil are coupled to the AC switching power supply in parallel or in series. 
         [0030]    The plasma reactor having multi discharging tubes further includes an inductively coupled plasma source provided with the lower discharging tube opening that is formed a lower part of the lower discharging tube, a dielectric tube that is equipped to be protruded downwardly to the lower discharging tube opening, and an inductive antenna winding coil to be wound on the dielectric tube wherein the inductive antenna winding coil and the first winding coil are coupled to the AC switching power supply in parallel or in series. 
         [0031]    The plasma reactor having multi discharging tubes of claim  1 , comprising an inductively coupled plasma source provided with the upper discharging tube opening that is formed a lower part of the upper discharging tube, a dielectric tube that is equipped to be protruded downwardly to the upper discharging tube opening, and an inductive antenna to be wound on the dielectric tube wherein the inductive antenna and the first winding coil are coupled to the AC switching power supply in parallel or in series. 
         [0032]    The plasma reactor having multi discharging tubes further includes an inductively coupled plasma source provided with the lower discharging tube opening that is formed an upper part of the lower discharging tube, a dielectric tube that is equipped to be protruded upwardly to the lower discharging tube opening, and an inductive antenna to be wound on the dielectric tube wherein the inductive antenna and the first winding coil are coupled to the AC switching power supply in parallel or in series. 
         [0033]    The plasma reactor having multi discharging tubes further includes a capacitively coupled plasma source provided with a first and second openings which are formed on an upper part and a lower part of the upper discharging tube, respectively, upper capacitively coupled electrodes which are arranged to an upper part and a lower part of the first and second openings, respectively, a third and fourth openings which are formed on an upper part and a lower part of the lower discharging tube, respectively, and lower capacitively coupled electrodes which are arranged to an upper part and a lower part of the third and fourth openings, respectively wherein the upper and lower capacitively coupled electrodes and the first winding coil are coupled to the AC switching power supply in parallel or in series. 
         [0034]    The plasma reactor having multi discharging tubes further includes at least one electric insulative members provided between the upper multi discharging tubes and the upper discharging tube, or between the multi discharging tubes and the lower discharging tube. 
         [0035]    The upper discharging tube comprises a partition for dividing the inside thereof to have at least two independent discharging regions. 
         [0036]    The lower discharging tube includes a partition for dividing the inside thereof to have at least two independent discharging regions. 
         [0037]    The gas exit of the lower discharging tube includes: a plurality of adaptor coupled to two or more process chambers; and a gas valve that is provided to the adaptor and controls flow amount of the activated gas in-flowed into the process chamber. 
         [0038]    The process chamber comprises exhaust valves which are provided to the exhaust tubes, respectively, and control exhaust flow amount. 
         [0039]    The plasma reactor having multi discharging tubes further includes a plurality of gas inlets which are coupled separately to the two or more discharging regions of the upper discharging tube. 
         [0040]    The plasma reactor having multi discharging tubes further includes a plurality of gas exits which are coupled separately to two or more discharging regions of the lower discharging tube. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0041]    The above and other features of the present invention will now be described in detail with reference to certain exemplary embodiments thereof illustrated in the accompanying drawings which are given hereinbelow by way of illustration only, and thus are not limitative of the present invention, and wherein: 
           [0042]      FIG. 1  is a block diagram illustrating a multi discharging tube plasma reactor according to the present invention and a plasma treating system provided therewith; 
           [0043]      FIG. 2  is an exploded perspective view illustrating a multi discharging tube plasma reactor according to a first embodiment of the present invention; 
           [0044]      FIG. 3  is a perspective view illustrating the assembled multi discharging tube plasma reactor as shown in  FIG. 2 ; 
           [0045]      FIG. 4  is a cross-sectional view illustrating the multi discharging tube plasma reactor as shown in  FIG. 2 ; 
           [0046]      FIG. 5  is a view illustrating exemplarily inductive magnetic flux in accordance to the current flowed through a first winding coil that is wound on a magnetic core as shown in  FIG. 2 ; 
           [0047]      FIG. 6  is a partially exploded perspective view illustrating exemplarily the multi discharging tube plasma reactor wherein a cooling water channel is provided to a discharging tube bridge of the reactor; 
           [0048]      FIG. 7  is an exploded perspective view illustrating a multi discharging tube plasma reactor according to a second embodiment of the present invention; 
           [0049]      FIG. 8  is a perspective view illustrating the assembled multi discharging tube plasma reactor as shown in  FIG. 7 ; 
           [0050]      FIG. 9  is a cross-sectional view illustrating the multi discharging tube plasma reactor as shown in FIG. 
           [0051]      FIG. 10  is a perspective view illustrating a multi discharging tube plasma reactor according to a third embodiment of the present invention; 
           [0052]      FIG. 11  is a cross-sectional view illustrating the multi discharging tube plasma reactor as shown in  FIG. 10 ; 
           [0053]      FIG. 12  is a perspective view illustrating a multi discharging tube plasma reactor according to a fourth embodiment of the present invention; 
           [0054]      FIG. 13  is a cross-sectional view illustrating the multi discharging tube plasma reactor as shown in  FIG. 12 ; 
           [0055]      FIG. 14  is a perspective view illustrating a multi discharging tube plasma reactor according to a fifth embodiment of the present invention; 
           [0056]      FIG. 15  is a cross-sectional view illustrating the multi discharging tube plasma reactor as shown in  FIG. 14 ; 
           [0057]      FIG. 16  is a perspective view illustrating a dual process chamber equipped with the multi discharging tube plasma reactor according to a sixth embodiment of the present invention; 
           [0058]      FIG. 17  is a cross-sectional view illustrating the inside of the dual process chamber as shown in  FIG. 16 ; 
           [0059]      FIG. 18  is a perspective view illustrating exemplarily a gas vale of an adaptor coupled to the dual process chamber and an exhaust valve added to an exhaust tube; 
           [0060]      FIG. 19  is a perspective view illustrating a multi discharging tube plasma reactor and a process chamber for multi treating according to a seventh embodiment of the present invention; 
           [0061]      FIG. 20  is a block diagram illustrating a plasma treating system of a multi discharging tube plasma reactor according to eighth embodiment of the present invention; 
           [0062]      FIG. 21  an exploded perspective view illustrating the multi discharging tube plasma reactor according to eighth embodiment of the present invention as shown in  FIG. 20 ; 
           [0063]      FIG. 22  is a cross-sectional view illustrating the multi discharging tube plasma reactor as shown in  FIG. 21 ; 
           [0064]      FIG. 23  is a perspective view illustrating a multi discharging tube plasma reactor according to a ninth embodiment of the present invention; 
           [0065]      FIG. 24  is a cross-sectional view illustrating the multi discharging tube plasma reactor as shown in  FIG. 23 ; 
           [0066]      FIG. 25  is a perspective view illustrating a multi discharging tube plasma reactor according to a tenth embodiment of the present invention; 
           [0067]      FIG. 26  is a cross-sectional view illustrating the multi discharging tube plasma reactor as shown in  FIG. 25 ; and 
           [0068]      FIG. 27  is a perspective view illustrating a multi discharging tube plasma reactor according to an eleventh embodiment of the present invention. 
       
    
    
       [0069]    It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various preferred features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment. 
         [0070]    In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing. 
       DETAILED DESCRIPTION 
       [0071]    Hereinafter, a battery system for a vehicle according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings. 
         [0072]    A plasma reactor  10  provided with multi discharging tubes according to the present invention is arranged on the outside of a process chamber  40 , as shown  FIG. 1  and thus plasma gas is supplied remotely to the process chamber  40 . The plasma reactor  10  is provided with multi discharging tubes of an upper discharging tube  11 , a lower discharging tube  12  and a plurality of discharging tube bridges  13 . 
         [0073]    Further, the plurality of discharging tube bridges  13  provides a plurality of discharging channels by coupling the upper discharging tube  11  and the lower discharging tube  12 . 
         [0074]    Here, a plurality of magnetic cores  22  each having a first winding coil  21  are equipped to the plurality of discharging tube bridges  13 , respectively, to form a transformer coupled plasma source  20 . 
         [0075]    A gas inlet  14  is provided to the upper discharging tube  11  of the plasma reactor  10  and a gas exit  15  is provided to a central lower part of the lower discharging tube  12 . 
         [0076]    At this time, the gas exit  15  is coupled to a chamber gas inlet  47  through an adaptor  48  and the plasma gas generated in the plasma reactor  10  is supplied to the process chamber  40  through the adaptor  48 . 
         [0077]    Furthermore, the plasma reactor  10  is provided with the multi discharging tubes to generate plasma so that the plasma of a large capacity can be generated stably in a wide range from about 1 torr or less of a low pressure to about 10 torr or more of a high pressure. 
         [0078]    Further, a substrate supporter  42  for supporting a process target-substrate  44  is provided in the process chamber  40  and the substrate supporter  42  may be coupled electrically to one or more bias power supply sources  70 ,  72  through an impedance matcher  74 . The adaptor  48  may be provided with an insulation section for an electric insulation and a cooling channel for preventing over-heating. A baffle  46  for supplying the plasma gas may be provided between the substrate supporter  42  and the chamber gas inlet  47  in the process chamber  40 . 
         [0079]    The baffle  46  distributes uniformly and diffuses the plasma gas in-flowed through the chamber gas inlet  47  to the process-target substrate  44 . 
         [0080]    The process target-substrate  44  is, for example, a silicon wafer substrate, or glass substrate for fabricating liquid crystal display or plasma display, etc. 
         [0081]    Further, a vacuum pump P for controlling the internal pressure of the process chamber  40  to a predetermined vacuum degree may be provided on one side of the process chamber  40 . 
         [0082]    Meanwhile, the transformer coupled plasma source  20  is operated by receiving wireless frequency from the power supply  30 . The power supply  30  is provided with at least one switching semiconductor devices to include an AC switching power supply  32  for generating wireless frequency, a power control circuit  33  and a voltage supply  31 . The at least one switching semiconductor devices, for example, may include at least one switching transistors. The power supply  31  converts alternative voltage supplied externally into a constant voltage and supplies it to the AC switching power supply  32 . The Ac switching power supply  32  is operated through a control from the power control circuit  33  to generate wireless frequency. 
         [0083]    Furthermore, the power control circuit  33  controls the operation of the AC switching power supply  32  to control voltage and current of the wireless frequency and further the control of the power control circuit  33  is performed based on electric or optical parameter value related to at least one transformer coupled plasma source  20  and the plasma generated in the plasma reactor  10 . For this purpose, the power control circuit  33  is provided with a measurement circuit for measuring the electric or optical parameter value. For example, the measurement circuit for measuring the electric and optical parameter of the plasma includes a current probe and an optical detector. The measurement circuit for measuring electric parameter of the transformer coupled plasma source  20  measures a driving current, a driving voltage and average power and maximum power of the transformer coupled plasma source  20 , and the voltage generated from the voltage supply  31 . 
         [0084]    The power control circuit  33  monitors continuously the related electric or optical parameter value through the measurement circuit and controls the AC switching power supply  32  while comparing the measured value to a reference value for a normal operation thereby controlling the voltage and current of the wireless frequency. Even though it is not shown concretely, a protection circuit may be provided on the power supply  30  in order to prevent electric loss that may be produced from an abnormal operation environment. The power supply  30  is coupled to a system controller  60  for controlling entirely the plasma treating system. The power supply  30  provides the operation state information of the plasma reactor  10  to the system controller  60 . The system controller  60  generates a control signal  62  for controlling entirely the operation of the plasma treating system and controls the operations of the plasma reactor  10  and the process chamber  40 . 
         [0085]    The plasma reactor  10  and the power supply  30  are separated physically. That is, the plasma reactor  10  and the power supply  30  are coupled electrically each other through a wireless frequency supply cable  35 . Through this separated configuration of the plasma reactor  10  and the power supply  30 , they can be easily maintained and repaired. However, the plasma reactor  10  and the power supply may be formed integrally. 
         [0086]    A multi discharging tube plasma reactor  10   a  according to a first embodiment of the present invention, as shown in  FIGS. 2 to 4 , supplies remotely plasma gas to the process chamber  40 . The plasma reactor  10   a  is provided with multi discharging tubes of an upper discharging tube  11 , a lower discharging tube  12  and a plurality of discharging tube bridges  13 . For example, four discharging tube bridges  13  provide a plurality of discharging channels by coupling an upper opening  18  of the upper discharging tube  11  and a lower opening  16  of the lower discharging tube  12 . Here, the magnetic cores  22  each having the first winding coil  21  are equipped to the plurality of discharging tube bridges  13 , respectively, to form a transformer coupled plasma source  20 . The magnetic core  22  may not be equipped to all of the discharging tube bridges  13 , and further the number of the discharging bridges  13  may be increased or decreased. 
         [0087]    When four discharging bridges  13  are provided and the magnetic cores  22  having the first winding coil  21  are equipped to the respective discharging tube bridges  13 , the magnetic flux directions that are varied in accordance to a direction of the current flowing through the first winding coil  21  are shown exemplarily in  FIG. 5 . As shown in  FIG. 5 , the magnetic flux of one discharging tube bridge  13  is induced as the same direction as the facing discharging tube bridge and as an opposing direction to the adjacent discharging tube bridge so that the adjacent discharging tube bridges  13  form the discharging channels as a pair. The discharging tube bridge has a tube structure wherein a cooling water channel  13   a  is provided therein and a cooling water inlet  13   b  is provided on an outside thereof, as shown in  FIG. 6 . 
         [0088]    The upper discharging tube  11  is provided with a gas inlet  14  and the lower discharging tube  12  is provided with a gas exit  15  coupled to the process chamber  40 . When process gas is supplied from a gas supply (not shown), the gas in-flowed into the upper discharging tube  11  is distributed through a plurality of discharging tube bridges  13  to be flowed into the lower discharging tube  12 . When power for generating plasma is supplied from the power supply  30  to the first winding coil  21 , the plasma discharging is performed via the upper discharging tube  11 , the plurality of discharging tube bridges  13  and the lower discharging tube  12 . 
         [0089]    The plasma reactor  10   a  according to the first embodiment of the present invention has a multi discharging tube configuration and the magnetic cores  22  having the first winding coil  21  are equipped to the plurality of discharging tube bridges  13 , respectively, and thus activated gas of a large capacity can be generated. The upper discharging tube  11 , the lower discharging tube  12  and the plurality of discharging tube bridges  13  may be made of metal material such as aluminum, stainless steel or copper. Further, they may be made of coated metal such as anodized aluminum or nickel plated aluminum. 
         [0090]    When the upper discharging tube  11 , the lower discharging tube  12  and the plurality of discharging tube bridges  13  are fabricated entirely with metal material, an insulation gap  17  may be provided at a proper location. For example, the insulation gap  17  may be provided between the upper discharging tube  11  and the discharging tube bridge  13 , or between the lower discharging tube  12  and the discharging tube bridge  13 . Further, the insulation gap  17  may be provided on a middle region of the discharging tube bridge  13 . When the insulation gap  17  is provided, a vortex flow can be prevented from being induced in the plasma reactor  10   a  along the plasma discharging channel. 
         [0091]    The upper discharging tube  11 , the lower discharging tube  12  and the plurality of discharging tube bridges  13  may be made of composite metal that is covalent-bonded with carbon nano tube. Further, they may be made of refractory metal. Additionally, they may be made entirely or partially of electric insulative material such as quartz or ceramic. The plasma reactor  10   a  may be made of any material proper for performing intended plasma process. 
         [0092]    The plasma reactor  10   a  may be shaped in accordance to the process-target substrate  13  and a proper configuration to generate uniform plasma, for example, circular configuration or quadrangle configuration, or any configurations. The process target-substrate  44  may be a wafer substrate, a glass substrate or a plastic substrate, etc., for manufacturing a semiconductor device, a display device and solar cell, etc. 
         [0093]    Even though it is not shown in the drawings, a partition may be provided in the plasma reactor  10   a  between the upper discharging tube  11  and the lower discharging tube  12  to provide two or more independent discharging regions. A plurality of gas inlets are coupled to the upper discharging tubes  11 , corresponding to the respective independent discharging regions to activate the different gases at the independent discharging regions, respectively, and supply them to the process chamber  40 . The configuration of the reactor as described-above is efficiently used in case where process efficiency is decreased or problematic while the different gases are mixed to be ionized. 
         [0094]    A multi discharging tube reactor  10   b  according to a second embodiment of the present invention, as shown in  FIGS. 7 to 9 , has basically the same configuration as the plasma reactor  10   a  according to the first embodiment of the present invention. However, in the plasma reactor  10   b  of the second embodiment, an inductively coupled plasma source  50  is provided on an external ceiling of the upper discharging tube  11 . An opening  19  for arranging a window is provided on a ceiling of the upper discharging tube  11  and further a dielectric flat window  52  to cover the opening  19  is provided. An inductive antenna flat coil  51  is provided adjacent to the dielectric window  52 . 
         [0095]    The inductive antenna flat coil  51  of the inductively coupled plasma source  50  and the first winding coil  21  of the transformer coupled plasma source  20  are connected to the power supply  30  in series. However, the inductive antenna flat coil  51  and the first winding coil  21  may be connected to the power supply  30  in parallel. Additionally, a switching circuit (not shown) may be provided for connecting them to the power supply in series or parallel, or connecting alternatively one of two to the power supply. 
         [0096]    When the inductively coupled plasma source  50  is added, a wide operational region of the reactor from a low voltage region to a high voltage region can be obtained stably. A plasma ignition can be generated easily and kept at the low voltage region by the inductively coupled plasma source  50  and further plasma of a large capacity can be kept at the high voltage region without damage to the inside of the reactor by the transformer coupled plasma source  20 . Two plasma sources can be operated efficiently with one power supply and further in a combined configuration of the inductively coupled plasma source  50  and the transformer coupled plasma source  20 , only one source may be driven alternatively or the combined source may be driven. 
         [0097]    Meanwhile, in a multi discharging tube plasma reactor  10   c  according to a third embodiment of the present invention, unlike to the second embodiment as described-above, the inductively coupled plasma source  50   b  is provided to the upper discharging tube  11  to be co-used as a gas inlet. A dielectric tube  52   a  to be co-used as the gas inlet is arranged to the upper discharging tube  11  and an inductive antenna winding coil  51   a  is arranged to the dielectric tube  52   a , and thus the gas in-flowed through the dielectric tube  52   a  is plasma-discharged at the moment while passing through the dielectric tube  52   a.    
         [0098]    In a multi discharging tube plasma reactor  10   d  according to a fourth embodiment of the present invention, as shown in  FIGS. 12 and 13 , unlike to the third embodiment, the dielectric tube  52   b  is not co-used as a gas inlet. An upper discharging tube opening  54  is provided on a bottom of the upper discharging tube  11  and the dielectric tube  52   b  and the inductive antenna winding coil  51   b  are equipped to the opening. Since plasma is maintained continuously and partially on the inside of the upper discharging tube  11  by the inductively coupled plasma source  50   b , plasma discharging maintaining efficiency can be improved. 
         [0099]    Meanwhile, a plasma reactor  10   e  according to a fifth embodiment of the present invention has basically the same configuration as the plasma reactor  10   a  in the first embodiment, as shown in  FIGS. 14 and 15 . However, in the plasma reactor  10   e  of the fifth embodiment, a first and second openings  81 ,  82  are provided on a ceiling and a bottom of the upper discharging tube  11 , respectively, and a capacitively coupled plasma source  80  is provided with upper capacitively coupled electrodes  83 ,  84  which are arranged to the openings. The upper capacitively coupled electrodes  83 ,  84  of the capacitively coupled plasma source  80  and the first winding coil  26  of the transformer coupled plasma source  20  are connected to the power supply  30  in series. However, the upper capacitively coupled electrodes  83 ,  84  and the first winding coil  26  may be connected to the power supply in parallel. Additionally, a switching circuit (not shown) may be provided for connecting them to the power supply in series or parallel, or connecting one of two to the power supply. 
         [0100]    When the capacitively coupled plasma source  80  is added, a wide operational region of the reactor from a low voltage region to a high voltage region can be obtained stably. A plasma ignition can be generated easily and kept at the low voltage region by the capacitively coupled plasma source  80  and further plasma of a large capacity can be kept at the high voltage region without damage to the inside of the reactor by the transformer coupled plasma source  20 . Two plasma sources can be operated efficiently with one power supply and further in a combined configuration of the capacitively coupled plasma source  80  and the transformer coupled plasma source  20 , only one source may be driven alternatively or the combined source may be driven. 
         [0101]    Meanwhile, a plasma reactor  10   f  according to a sixth embodiment of the present invention has basically the same configuration as the plasma reactor  10   a  in the first embodiment, as shown in  FIGS. 16 and 17 . However, the gas inlet  14  is arranged on a ceiling of the upper discharging tube  11 , and the lower discharging tube has two gas exits (not shown). Two gas exits are connected to two process chambers  40   a ,  40   b , respectively, through the respective adaptors  91 ,  92 . Two process chambers perform independently substrate treating process. Here, the baffles  46   a ,  46   b  for distributing gas and the substrate supporters  42   a ,  42   b  on which the process target-substrates  44   a ,  44   b  are disposed are provided on the inside of the two process chambers  40   a ,  40   b , respectively. In the two process chambers  40   a ,  40   b , an exhaust tube  93  for discharging gas is connected to a vacuum pump  94 . 
         [0102]    Furthermore, as shown in  FIG. 18 , the gas valves  95 ,  96  are provided to the two adaptors  91   a ,  91   b , respectively, to control independently flow amount of the activated gas in-flowed into two process chambers  40   a ,  40   b . Further, the respective exhaust valves  97 ,  98  are provided on the exhaust tube  93  to control independently exhaust amount. 
         [0103]    As described-above, two or more gas exits are arranged to the lower discharging tube  12  of the plasma reactor  10   f  and it is possible to supply multiply the activated gas to two or more process chambers. For example, as shown in  FIG. 19 , in the multi discharging tube plasma reactor according to a seventh embodiment of the present invention, four gas exits (not shown) are provided to the lower discharging tube  12  and four adaptors  91   a - 91   d  are coupled to them, respectively, and they may be used in a process chamber  40   c  for multi treating simultaneously four process target-substrates. 
         [0104]    The plasma reactor  10   f  of a multi discharging tube configuration can generate activated gas of a large capacity and thus a plurality of gas exits necessary to the lower discharging tube  12  are provided to supply simultaneously activated gas to a plurality of process chambers. If necessary, a gas valve may be provided on the adaptor to control flow amount of the gas supplied, and when it is not necessary to supply the activated gas, the gas valve is cut off to stop alternatively the supply of the activated gas. 
         [0105]    Like in the embodiments as described-above, plasma generation efficiency and control efficiency can be increased by adapting the inductively coupled plasma source  50 ,  50   a ,  50   b  or the capacitively coupled plasma source  80  together with the transformer coupled plasma source  20 . A partition is provided on the upper discharging tube  11  and the lower discharging tube  12  to form independent discharging channels, respectively, and further the gas inlets are connected individually to supply separately different gases for generating activated gas. 
         [0106]    Meanwhile, a multi discharging tube plasma reactor  10   b  according to a eighth embodiment of the present invention, as shown in  FIGS. 21 and 22 , the inductively coupled plasma source  50  is arranged to an upper part of the upper discharging tube  11  and a lower part of the lower discharging tube  12 . The upper discharging tube opening  53  for arranging a window is provided on an upper part of the upper discharging tube  11  and the upper discharging tube opening  54  is provided on a lower part of the lower discharging tube  12 . 
         [0107]    Further, the dielectric flat window  52  is provided on the upper discharging tube opening  53  and the lower discharging tube opening  54  to cover the openings  53 ,  54 . The inductive antenna flat coils  51  are arranged, respectively, adjacent to the dielectric flat window  52 . 
         [0108]    Furthermore, the inductive antenna flat coil  51  of the inductively coupled plasma source  50  and the first winding coil  21  of the transformer coupled plasma source  20  are connected to the power supply  30  in series, as shown in  FIG. 20 . However, the inductive antenna flat coil  51  and the first winding coil  21  may be connected to the power supply  30  in parallel. Additionally, a switching circuit (not shown) may be provided for connecting them to the power supply in series or parallel, or connecting one of two to the power supply. 
         [0109]    When the inductively coupled plasma source  50  is added as described-above, a wide operational region of the reactor from a low voltage region to a high voltage region can be obtained stably. A plasma ignition can be generated easily and kept at the low voltage region by the inductively coupled plasma source  50  and further plasma of a large capacity can be kept at the high voltage region without damage to the inside of the reactor by the transformer coupled plasma source  20 . 
         [0110]    Furthermore, two plasma sources  20 ,  50  can be operated efficiently with one power supply and further in a combined configuration of the inductively coupled plasma source  50  and the transformer coupled plasma source  20 , only one source may be driven alternatively or the combined source may be driven. 
         [0111]    In a multi discharging tube plasma reactor  10   a  according to a ninth embodiment of the present invention, as shown in  FIGS. 23 and 24 , the inductively coupled plasma sources  50   a  are provided to the upper discharging tube  11  and the gas exit  15  at a lower part of the lower discharging tube  12 , respectively, to be co-used as a gas inlet. 
         [0112]    At this time, an upper discharging tube opening  55  is provided at an upper part of the upper discharging tube  11  and further a lower discharging tube opening  56  is provided at a lower part of the lower discharging tube  12 . 
         [0113]    Furthermore, the dielectric tube  52   a  is arranged to be protruded upwardly to the upper discharging tube opening  55  to be co-used as the gas inlet, and the inductive antenna winding coil  51   a  is arranged to the dielectric tube  52   a . Accordingly, the gas in-flowed into the upper discharging tube  11  through the dielectric tube  52   a  is plasma-discharged at the moment while passing through the dielectric tube  52   a.    
         [0114]    Further, the gas passing through a plurality of discharging tube bridges  13  is plasma-discharged again while passing through the gas exit  15  on which the antenna winding coil  51   a  is arranged before the gas is injected into the process chamber  40 . 
         [0115]    Furthermore, a power may be applied alternatively to the inductive antenna winding coil  51   a  of the conductively coupled plasma source  50   a  to operate it. 
         [0116]    Meanwhile, in a multi discharging tube plasma reactor  10   d  according to a tenth embodiment of the present invention, as shown in  FIGS. 25 and 26 , the dielectric tube  52   b  is not co-used as the gas inlet. The upper discharging tube opening  54  is provided at a bottom of the upper discharging tube  11  and the lower discharging tube opening  55  is provided at an upper part of the lower discharging tube  12  wherein the dielectric tubes  52   b  protruding downwardly from the upper discharging tube opening  54  and upwardly from the lower discharging tube opening  55  are provided and the inductive antenna winding coil  51   b  is arranged on an outer peripheral surface of the dielectric tube  52   b.    
         [0117]    Since the plasma is maintained continuously and partially inside the upper discharging tube  11  and the lower discharging tube  12  by the inductively coupled plasma source  50   b , the plasma discharging maintaining efficiency can be improved. 
         [0118]    Furthermore, a multi discharging tube plasma reactor  10   e  according to a eleventh embodiment of the present invention has basically the same configuration as the plasma reactor  10   e  in the fifth embodiment; however, in the plasma reactor  10   e  of the eleventh embodiment, as shown in  FIG. 27 , a first and second openings  81 ,  82  are provided on an upper part and a lower part of the upper discharging tube  11 , respectively, and the capacitively coupled plasma source  80  is provided with the upper capacitively coupled electrodes  83 ,  84  arranged to the openings. 
         [0119]    Furthermore, a third and fourth openings  85 ,  86  are provided at an upper part and a lower part of the lower discharging tube  12  and the lower capacitively coupled electrodes  87 ,  88  are arranged to the openings, respectively. 
         [0120]    At this time, the upper capacitively coupled electrodes  83 ,  84  may be separated from the first and second openings  81 ,  82  of the upper discharging tube  11  by an insulator (not indicated with reference numerals in drawings) and the lower capacitively coupled electrodes  87 ,  88  may be separated from the third and fourth openings  85 ,  86  of the lower discharging tube  12  by an insulator (not indicated with reference numerals in drawings). 
         [0121]    The upper and lower capacitively coupled electrodes  83 ,  84 ,  87 ,  88  of the capacitively coupled plasma source  80  and the first winding coil  26  of the transformer coupled plasma source  20  are connected to the power supply  30  in series. However, the upper and lower capacitively coupled electrodes  83 ,  84 ,  87 ,  88  and the first winding coil  26  may be connected to the power supply in parallel. Additionally, a switching circuit (not shown) may be provided for connecting them to the power supply in series or parallel, or connecting one of two to the power supply. 
         [0122]    When the capacitively coupled plasma source  80  is added as described-above, a wide operational region of the reactor from a low voltage region to a high voltage region can be obtained stably. A plasma ignition can be generated easily and kept at the low voltage region by the capacitively coupled plasma source  80  and further plasma of a large capacity can be kept at the high voltage region without damage to the inside of the reactor by the transformer coupled plasma source  20 . Two plasma sources can be operated efficiently with one power supply and further in a combined configuration of the capacitively coupled plasma source  80  and the transformer coupled plasma source  20 , only one source may be driven alternatively or the combined source may be driven. 
         [0123]    As described-above, the transformer coupled plasma source  20 , the inductively coupled plasma sources  50 ,  50   a ,  50   b  and the capacitively coupled plasma source  80  are arranged integrally and the plasma of the transformer coupled plasma source can be maintained continuously while a low power is supplied to operate the inductively coupled plasma sources  50 ,  50   a ,  50   b  or the capacitively coupled plasma source  80 . 
         [0124]    According to a plasma reactor having multi discharging tubes of the present invention, the plasma of a large capacity can be generated stably in a wide pressure range from a low pressure to a high pressure (from 1 torr or less to 10 torr or more) by providing the multi discharging tubes. 
         [0125]    Furthermore, according to a plasma reactor having multi discharging tubes of the present invention, a partition is provided between the upper discharging tube and the lower discharging tube to form two or more independent discharging regions in which different gases are activated at the respective independent discharging regions to be supplied separately into the process chamber and thus a problem that process efficiency is decreased when the different gases are mixed to be ionized can be prevented. 
         [0126]    Further, according to the present invention, the plasma reactor can be operated in a wide operation range from a low pressure region to a high pressure region by installing integrally the inductively coupled plasma source or the capacitively coupled plasma source, in addition to the transformer coupled plasma source. 
         [0127]    According to the plasma reactor of the present invention, two plasmas sources can be operated by using one power supply and in a combined configuration of the transformer coupled plasma source and other plasma sources, only one plasma source can be driven or the combined plasma source can be driven. 
         [0128]    Furthermore, another object of the present invention is to provide a plasma reactor, capable of injecting different process gases into the multi discharging tubes to perform processes including a cleaning process for semiconductor. 
         [0129]    Another object of the present invention is to provide a plasma reactor having multi discharging tubes, capable of maintaining a plasma state even at a low power. 
         [0130]    While the plasma reactor having a multi discharging tube according to the present invention has been illustrated and described with reference to specific embodiments, it is apparent to those skilled in the art to which the present invention pertains that the present invention may be variously improved and changed without departing from the scope of the present invention.