Patent Publication Number: US-2021166945-A1

Title: Substrate Processing Apparatus, Method of Manufacturing Semiconductor Device and Non-transitory Computer-readable Recording Medium

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of International Application No. PCT/JP2018/031197, filed on Aug. 23, 2018. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to a substrate processing apparatus, a method of manufacturing a semiconductor device and a non-transitory computer-readable recording medium. 
     BACKGROUND 
     According to some related arts, a substrate processing apparatus is provided with a groove such that the microwave supplied to a process space in which a substrate is processed is suppressed from being transmitted into a non-process space. For example, the groove is provided on a side wall of a substrate support or on an inner wall of a process vessel facing the side wall. 
     A process housing accommodating a process chamber is provided. The substrate is processed in the process chamber by supplying the microwave into the process chamber. A transfer housing accommodating a transfer chamber is provided next to the process housing. The substrate is transferred into the process chamber from the transfer chamber or transferred out of the process chamber into the transfer chamber. A loading/unloading port connecting the process chamber and the transfer chamber is provided, and an opening/closing structure configured to open or close the loading/unloading port is provided. 
     In such a configuration, the microwave leaking from the process chamber may be detected by detecting the microwave leaking through a joint between the process housing and the transfer housing. 
     SUMMARY 
     Described herein is a technique capable of preventing electronic components arranged inside a transfer chamber from malfunctioning or being damaged due to a microwave leakage into the transfer chamber. 
     According to one aspect of the technique of the present disclosure, there is provided a substrate processing apparatus including: a process housing including a process chamber in which a substrate is processed; a transfer housing provided adjacent to the process housing and comprising a transfer chamber wherein the substrate is transferred between the process chamber and the transfer chamber; a microwave generator configured to transmit a microwave to be supplied into the process chamber; a loading/unloading port connecting between the process chamber and the transfer chamber and through which the substrate is transferred; an opening/closing structure configured to open or close the loading/unloading port; and a detection sensor provided in the transfer chamber adjacent to the loading/unloading port and configured to detect the microwave leaking to the transfer chamber from the process chamber through the loading/unloading port while the opening/closing structure maintains the loading/unloading port closed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  schematically illustrates a substrate processing apparatus according a first embodiment described herein when viewed from an inside of a transfer chamber thereof toward a loading/unloading port of thereof. 
         FIG. 2  schematically illustrates the substrate processing apparatus according the first embodiment described herein when viewed from the inside of the transfer chamber toward the loading/unloading port. 
         FIG. 3  is a cross-sectional view schematically illustrating a process chamber and its peripheral structure of the substrate processing apparatus according the first embodiment described herein. 
         FIG. 4  is a cross-sectional view schematically illustrating components such as a cooling chamber of the substrate processing apparatus according the first embodiment described herein. 
         FIG. 5  is a cross-sectional view schematically illustrating components such as the process chamber, the transfer chamber and the cooling chamber of the substrate processing apparatus according the first embodiment described herein. 
         FIG. 6  is a flow chart schematically illustrating step of a substrate processing of the substrate processing apparatus according the first embodiment described herein. 
         FIG. 7  is a block diagram schematically illustrating a configuration of a controller and related components of the substrate processing apparatus according to the first embodiment described herein. 
         FIG. 8  schematically illustrates an overall configuration of the substrate processing apparatus according to the first embodiment described herein. 
         FIG. 9  is a flow chart schematically illustrating step of a substrate processing of a substrate processing apparatus according a second embodiment described herein. 
         FIG. 10  schematically illustrates a substrate processing apparatus according a modified example of the embodiments described above when viewed from an inside of a transfer chamber thereof toward a loading/unloading port thereof. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, one or more embodiments (hereinafter, simply referred to as “embodiments”) according to the technique of the present disclosure will be described. 
     First Embodiment 
     An example of a substrate processing apparatus, a method of manufacturing a semiconductor device and a non-transitory computer-readable recording medium according to the first embodiment described herein will be described with reference to  FIGS. 1 through 8 . In the figures, a direction indicated by an arrow H represents a height direction (a vertical direction) of the substrate processing apparatus, a direction indicated by an arrow W represents a width direction (a horizontal direction) of the substrate processing apparatus, and a direction indicated by an arrow D represents a depth direction (another horizontal direction) of the substrate processing apparatus. Hereinafter, the height direction, the width direction and the depth direction of the substrate processing apparatus may be simply referred to as an “apparatus height direction”, an “apparatus width direction” and an “apparatus depth direction”, respectively. 
     Configuration of Substrate Processing Apparatus  1   
     As shown in  FIG. 8 , a substrate processing apparatus  1  according to the present embodiment is configured as a heat treatment apparatus capable of performing various kinds of heat treatments on a semiconductor wafer (hereinafter, also simply referred to as a “wafer”)  2  serving as a substrate or a plurality of wafers including the wafer  2 . The present embodiment will be described by way of an example in which the substrate processing apparatus  1  is configured as an apparatus that performs an annealing process using a microwave (electromagnetic wave) such as a process of changing a composition and a crystal structure of a film formed on a surface of the wafer  2  and a process of recovering a crystal defect in the film. In the substrate processing apparatus  1 , a FOUP (Front Opening Unified Pod, hereinafter, also simply referred to as a “pod”)  3  serving as a storage vessel (carrier) is used. The pod  3  is also used as a transfer vessel. That is, the wafer  2  is transferred between various substrate processing apparatuses including the substrate processing apparatus  1  while the wafer  2  is accommodated in the pod  3 . 
     As shown in  FIG. 8 , the substrate processing apparatus  1  includes a transfer chamber (transfer region)  4  from/to which the wafer  2  is transferred and a process chamber  5  in which the wafer  2  is processed. The transfer chamber  4  is provided inside a transfer housing  41 . According to the present embodiment, as shown in  FIG. 5 , the process chamber  5  includes two process chambers, that is, a first process chamber  51  and a second process chamber  52 . The process chamber  5  is provided on a side wall of the transfer housing  41  opposite to the pod  3 . The first process chamber  51  and the second process chamber  52  are provided inside a first process housing  53  and a second process housing  54 , respectively. Hereinafter, the first process chamber  51  may be simply referred to as the process chamber  51 , the second process chamber  52  may be simply referred to as the process chamber  52 , the first process housing  53  may be simply referred to as the process housing  53  and the second process housing  54  may be simply referred to as the process housing  54 . The process chamber  51  and the process chamber  52  are spaced apart from each other in the apparatus depth direction. 
     According to the present embodiment, for example, the transfer housing  41  of the transfer chamber  4  is made of a material such as quartz and a metal material such as aluminum (Al) and stainless steel (SUS). 
     As shown in  FIG. 8 , a loading port structure (LP)  6  is arranged on one side (right side in  FIG. 8 ) of the transfer chamber  4  that faces toward the apparatus width direction. The loading port structure  6  is used as a pod opening/closing structure capable of opening and closing a lid of the pod  3 , transferring the wafer  2  from the pod  3  to the transfer chamber  4  and transferring the wafer  2  from the transfer chamber  4  to the pod  3 . 
     The loading port structure  6  includes a housing  61 , a stage  62  and an opener  63 . The stage  62  is configured such that the pod  3  is placed thereon and that the pod  3  is brought close to a substrate loading/unloading port  42  formed in the transfer chamber  4  on one side of the transfer housing  41  that faces toward the apparatus width direction. The opener  63  is configured to open and close the lid (not shown) provided on the pod  3 . 
     The loading port structure  6  may be capable of purging an inside of the pod  3  using a purge gas. For example, an inert gas such as nitrogen (N 2 ) gas may be used as the purge gas. 
     Opening/closing structures (so-called gate valves)  43  capable of opening and closing the process chambers  51  and  52  (see  FIG. 5 ) are arranged on the other side (left side in  FIG. 8 ) of the transfer chamber  4  that faces toward the apparatus width direction. That is, an opening/closing structure capable of opening and closing the process chamber  51  and an opening/closing structure capable of opening and closing the process chamber  52  are provided as the opening/closing structures  43 . In the present specification, the opening/closing structure capable of opening and closing the process chamber  51  may also be simply referred to as an opening/closing structure  43 , and the opening/closing structure capable of opening and closing the process chamber  52  may also be simply referred to as an opening/closing structure  43 . A transfer structure  7  serving as a substrate transfer structure (substrate transfer robot) of transferring the wafer  2  is arranged in the transfer chamber  4 . For example, the transfer structure  7  is constituted by: tweezers (arms)  71  and  72  serving as mounting structures on which the wafer  2  is placed; a transfer device  73  capable of rotating or linearly moving each of the tweezers  71  and  72  in the horizontal direction; and a transfer device elevator  74  capable of elevating or lowering the transfer device  73 . 
     The transfer structure  7  may load the wafer  2  into a boat  8  (see  FIGS. 3 and 8 ) serving as a substrate retainer provided inside the process chamber  5  or may load the wafer  2  into the pod  3  by consecutive operations of the tweezers  71  and  72 , the transfer device  73  and the transfer device elevator  74 . In addition, the transfer structure  7  may unload the wafer  2  out of the boat  8  or may unload the wafer  2  out of the pod  3 . In the description of the present embodiment, the process chamber  51  and the process chamber  52  may be collectively or individually referred to as the process chamber  5  unless they need to be distinguished separately. 
     As shown in  FIG. 5 , a cooling chamber  9  is arranged between the process chamber  51  and the process chamber  52 . As shown in  FIG. 4 , a wafer cooling table  9   a  is arranged in the cooling chamber  9 , and a wafer cooling retainer (a cooling boat)  9   b  serving as a substrate cooling retainer configured to cool the wafer  2  is placed on the wafer cooling table  9   a . A structure of the wafer cooling retainer  9   b  is similar to that of the boat  8 . The wafer cooling retainer  9   b  is provided with a plurality of wafer supporting grooves (wafer supporting portions) from an upper portion to a lower portion thereof. The wafer cooling retainer  9   b  is configured to hold the plurality of the wafers including the wafer  2  vertically in a horizontal orientation in a multistage manner. A loading/unloading port  9   h  configured to communicate with the transfer chamber  4  is provided on a side wall of the cooling chamber  9  in contact with the transfer chamber  4 . As described above, the cooling chamber  9  is arranged at a different location from the transfer chamber  4 . Therefore, it is possible to cool the wafer  2  after a wafer processing (also referred to as a “substrate processing”) without reducing the throughput of the wafer processing or a wafer transfer process. 
     Configuration of Process Chamber  5   
     As shown in  FIGS. 5 and 8 , the process chamber  5  is configured as a process furnace of the substrate processing apparatus  1 . According to the present embodiment, a configuration of the process chamber  51  is substantially the same as that of the process chamber  52 . Therefore, the process chamber  51  will be described below, and the description of the process chamber  52  will be omitted. 
     As shown in  FIG. 3 , the process chamber  51  is provided inside the process housing  53  of a hollow rectangular parallelepiped shape serving as a cavity (process vessel). For example, the process housing  53  is made of a metal material such as aluminum (Al) capable of reflecting the microwave. A cap flange (which is a closing plate)  55  is provided on a ceiling (upper portion) of the process housing  53 . For example, the cap flange  55  is made of a metal material similar to the process housing  53 . The cap flange  55  is attached to the process housing  53  with a seal (sealing structure: not shown) interposed therebetween to airtightly seal the process chamber  5 . The wafer  2  is processed in the process chamber  5 . For example, an O-ring is used as the seal. 
     A reaction tube (not shown) made of quartz capable of transmitting the microwave may be provided in the process housing  53 . When the reaction tube is provided in the process housing  53 , an inner space of the reaction tube is used as an effective process chamber  51 . In addition, the process housing  53  may not include the cap flange  55 . When the cap flange  55  is not included, the process housing  53  with a closed ceiling may be used. 
     A standby region  57  is provided at the bottom of the process chamber  51 . A mounting table  56  capable of moving in the process chamber  51  in the vertical direction is provided inside the standby region  57 . The boat  8  is placed on an upper surface of the mounting table  56 . For example, a quartz boat is used as the boat  8 . The boat  8  is provided with susceptors  81  and  82  that are vertically separated and opposed to each other. The wafer  2  loaded into the process chamber  51  through a loading/unloading port  51   h  is held by the boat  8  while the wafer  2  is interposed between the susceptor  81  and the susceptor  82 . 
     The susceptors  81  and  82  are configured to indirectly heat the wafer  2  made of a dielectric material capable of self-heating (that is, generating heat) by absorbing the microwave. For example, a silicon semiconductor plate (also referred to as a “Si plate”) or a silicon carbide plate (also referred to as a “SiC plate”) may be used as the susceptors  81  and  82 . Therefore, the susceptors  81  and  82  may also be referred to as an “energy conversion structure”, a “radiant plate” or a “soaking plate”. In particular, the number of wafers to be held in the boat  8  is not limited. However, for example, the boat  8  is capable of holding three wafers including the wafer  2  stacked in the vertical direction with predetermined intervals therebetween. When the susceptors  81  and  82  are provided, it is possible to heat the wafer  2  (or the plurality of the wafers including the wafer  2 ) more uniformly and more efficiently by the radiant heat from the susceptors  81  and  82 . 
     Quartz plates serving as heat insulating plates may be arranged in the boat  8  above the susceptor  81  and below the susceptor  82 , respectively. The process chamber  5  is arranged adjacent to the transfer chamber  4  in the horizontal direction. However, the process chamber  5  may be arranged adjacent to the transfer chamber  4  in a direction perpendicular to the transfer chamber  4 , specifically, above or below the transfer chamber  4 . 
     As shown in  FIGS. 3, 5 and 8 , in the process chamber  5  (that is, the process chamber  51 ), the loading/unloading port  51   h  configured to communicate with the transfer chamber  4  is provided on a side wall of the process chamber  5  in contact with the transfer chamber  4 . The wafer  2  is loaded into the process chamber  5  from the transfer chamber  4  through the loading/unloading port  51   h , and is unloaded to the transfer chamber  4  out of the process chamber  5  through the loading/unloading port  51   h . A choke structure (not shown) whose length is of ¼ wavelength of the microwave used in a substrate processing such as the annealing process is provided around the opening/closing structure  43  or the loading/unloading port  51   h . The choke structure is configured as a measure against a microwave leakage. In the process chamber  5  (that is, the process chamber  52 ), a loading/unloading port  52   h  configured to communicate with the transfer chamber  4  is provided on the side wall of the process chamber  5  in contact with the transfer chamber  4  (see  FIG. 1 ). 
     As shown in  FIGS. 1 and 2 , vertical driving structures  44  capable of moving each of the opening/closing structures  43  up and down are arranged below the opening/closing structures  43 , respectively. As a result, the vertical driving structures  44  are configured to open and close the loading/unloading ports  51   h  and  52   h  by moving the opening/closing structures  43  up and down, respectively. 
     In addition, a plurality of detection sensors (first detection sensors, for example, three detection sensors)  46   a  and a plurality of detection sensors (second detection sensors, for example, three detection sensors)  46   b , which are configured to detect the microwave leaking to the transfer chamber  4  from the process chambers  51  and  52  through the loading/unloading ports  51   h  and  52   h  while the opening/closing structures  43  maintain the loading/unloading ports  51   h  and  52   h  closed, are installed in the transfer chamber  4  around the loading/unloading ports  51   h  and  52   h , respectively. In the present specification, the plurality of the detection sensors  46   a  may be simply referred to as the detection sensors  46   a  and the plurality of the detection sensors  46   b  may be simply referred to as the detection sensors  46   b . Specifically, the detection sensors  46   a  and the detection sensors  46   b  are attached to an inner wall  41   a  of the transfer housing  41 . The loading/unloading ports  51   h  and  52   h  are provided on the inner wall  41   a . The detection sensors  46   a  are arranged outside the loading/unloading port  51   h  (that is, for example, on a left side wall of the transfer housing  41  opposite to the loading/unloading port  52   h  and located on the left side of  FIGS. 1, 2 and 5 ), and the detection sensors  46   b  are arranged outside the loading/unloading port  52   h  (that is, for example, on a right side wall of the transfer housing  41  opposite to the loading/unloading port  51   h  and located on the right side of  FIGS. 1, 2, and 5 ). That is, the detection sensors  46   a  are arranged at positions away from the loading/unloading port  52   h  of the second process chamber  52  (that is, at positions beyond the reach of the microwave leaking through the loading/unloading port  52   h ), and the detection sensors  46   b  are arranged at positions away from the loading/unloading port  51   h  of the first process chamber  51  (that is, at positions beyond the reach of the microwave leaking through the loading/unloading port  51   h ). By arranging the detection sensors  46   a  and the detection sensors  46   b  at such positions, it is possible to prevent the detection sensors  46   a  from erroneously detecting the microwave leaking through the loading/unloading port  52   h  of the second process chamber  52  and it is also possible to prevent the detection sensors  46   b  from erroneously detecting the microwave leaking through the loading/unloading port  51   h  of the first process chamber  51 . 
     In the present embodiment, by comparing an opening width and an opening height of each of the loading/unloading ports  51   h  and  52   h , the longer between the opening width and the opening height is defined as a distance K 1 . Then, the term “in the transfer chamber  4  around the loading/unloading ports  51   h  and  52   h ” refers to a region whose distance from opening edges of the loading/unloading ports  51   h  and  52   h  is within the distance K 1  when viewed from an opening direction in which the loading/unloading ports  51   h  and  52   h  open. 
     According to the present embodiment, the detection sensors (for example, three detection sensors)  46   a  are provided as sensors configured to detect the microwave leaking through the loading/unloading port  51   h . The detection sensors  46   a  are arranged opposite to the loading/unloading port  52   h  with reference to the loading/unloading port  51   h  when viewed from the opening direction in which the loading/unloading port  51   h  is open (in the present embodiment, the apparatus width direction), and are arranged vertically. In addition, a range within which the detection sensors  46   a  are arranged in the vertical direction covers an opening area of the loading/unloading port  51   h . Further, a distance between each of the detection sensors  46   a  and the loading/unloading port  51   h  (L 1  in  FIG. 1 ) along the apparatus depth direction is set to be equal to or less than the opening width of the loading/unloading port  51   h  (W 1  in  FIG. 1 ). 
     From the viewpoint of improving the detection accuracy by the detection sensors  46   a , the distance L 1  between each of the detection sensors  46   a  and the loading/unloading port  51   h  is preferably equal to or less than half the opening width W 1  of the loading/unloading port  51   h , more preferably equal to or less than 40% of the opening width W 1  of the loading/unloading port  51   h , and still more preferably equal to or less than 20% of the opening width W 1  of the loading/unloading port  51   h.    
     According to the present embodiment, the detection sensors (for example, three detection sensors)  46   b  are provided as sensors configured to detect the microwave leaking through the loading/unloading port  52   h . The detection sensors  46   b  are arranged opposite to the loading/unloading port  51   h  with reference to the loading/unloading port  52   h  when viewed from the opening direction in which the loading/unloading port  52   h  is open, and are arranged vertically. In addition, a range within which the detection sensors  46   b  are arranged in the vertical direction covers an opening area of the loading/unloading port  52   h  is open. Further, a distance between each of the detection sensors  46   b  and the loading/unloading port  52   h  (L 2  in  FIG. 1 ) along the apparatus depth direction is set to be equal to or less than the opening width of the loading/unloading port  52   h  (W 2  in  FIG. 1 ). 
     From the viewpoint of improving the detection accuracy of the detection sensors  46   b , the distance L 2  between each of the detection sensors  46   b  and the loading/unloading port  52   h  is preferably equal to or less than half the opening width W 2  of the loading/unloading port  52   h , more preferably equal to or less than 40% of the opening width W 2  of the loading/unloading port  52   h , and still more preferably equal to or less than 20% of the opening width W 2  of the loading/unloading port  52   h.    
     As shown in  FIG. 3 , an electromagnetic wave supplier (which is an electromagnetic wave supply system)  90  serving as a heating apparatus is arranged on a side wall of the process housing  53  opposite to the transfer chamber  4 . According to the present embodiment, for example, the electromagnetic wave supplier  90  is constituted by a microwave generator  91  and a microwave generator  92 . Specifically, the microwave generators  91  and  92  are arranged so as to face the loading/unloading ports  51   h  and  52   h  with the process chamber  5  interposed therebetween. The microwave transmitted from the microwave generators  91  and  92  are supplied to the process chamber  5  to heat the wafer  2  and perform various processes on the wafer  2 . 
     The mounting table  56  on which the boat  8  is placed is connected to and supported by an upper end of a shaft  58  serving as a rotating shaft at a center portion of a lower surface of the mounting table  56 . The other end of the shaft  58  penetrates the bottom of the process housing  53  (that is, the bottom of the standby region  57 ), and is connected to a driving structure  59  arranged on a lower portion of the process housing  53 . According to the present embodiment, an electric motor and an elevating apparatus are used as the driving structure  59 . The other end of the shaft  58  is connected to a rotating shaft of the electric motor. Since the shaft  58  is connected to the driving structure  59 , by rotating the shaft  58  by the driving structure  59 , the mounting table  56  and the wafer  2  accommodated in the boat  8  are rotated. 
     A bellows  57   b  capable of expanding and contracting in the vertical direction covers an outer circumference of the shaft  58  from the bottom of the standby region  57  to the driving structure  59 . The bellows  57   b  is configured to maintain the inside of the process chamber  5  and the inside of the transfer region  4  airtight. 
     The driving structure  59  is configured so that the mounting table  56  can be elevated and lowered in the vertical direction. That is, the driving structure  59  is configured to elevate the boat  8  from a position at which the wafer  2  is accommodated in the standby region  57  to a position (which is a wafer processing position) at which the wafer  2  is accommodated in the process chamber  5 . On the contrary, the driving structure  59  is configured to lower the boat  8  from the position at which the wafer  2  is accommodated in the process chamber  5  to the position at which the wafer  2  is accommodated in the standby region  57 . 
     Configuration of Exhauster  10   
     As shown in  FIGS. 3 and 8 , an exhauster (which is an exhaust structure or an exhaust system)  10  is provided at an upper portion of the process chamber  5  in the substrate processing apparatus  1  according to the present embodiment. The exhauster  10  is configured to exhaust an inner atmosphere of the process chamber  5 . As shown briefly in  FIG. 3 , the exhauster  10  includes an exhaust port  11   a  provided on a ceiling of the process chamber  5 . The exhaust port  11   a  is connected to one end of an exhaust pipe  11 . 
     As shown in  FIG. 3 , a valve  12  and a pressure regulator (which is an automatic pressure adjusting valve)  13  are sequentially installed in series and connected to a vacuum pump  14 . The valve  12  is used as an opening/closing valve. For example, as the automatic pressure adjusting valve  13 , an automatic pressure control (APC) valve configured to control a valve opening degree according to an inner pressure of the process chamber  5  may be used. In the description of the present embodiment, the exhauster  10  may be described simply as the “exhaust system” or simply an “exhaust line”. 
     Configuration of Gas Introducer  20   
     As shown in  FIG. 3 , in the substrate processing apparatus  1 , a gas introducer (which is a gas introduction structure or a gas introduction system)  20  is provided at a lower portion of the process chamber  5 . Specifically, the gas introducer  20  includes a supply pipe  21  whose one end is connected to a supply port  21   a  arranged on the side wall of the process chamber  5  opposite to the transfer chamber  4 . The supply port  21   a  is arranged below the exhaust port  11   a  of the exhaust pipe  11 . The other end of the supply pipe  21  is connected to a gas supply source (not shown) through a valve  22  and a mass flow controller (MFC)  23  interposed therebetween in series. For example, the valve  22  is used as an opening/closing valve. The MFC  23  functions as a flow rate controller. The gas supply source is configured to supply a process gas used for the substrate processing. A gas such as an inert gas, a source gas and a reactive gas may be used as the process gas. The process gas supplied from the gas supply source is supplied into the process chamber  5 . According to the present embodiment, as the inert gas, specifically, nitrogen gas is supplied from the gas supply source into the process chamber  5 . 
     When two or more kinds of gases are supplied into the process chamber  5  during the substrate processing, it is possible to supply the gases by connecting a supply pipe (or a plurality of gas supply pipes) to the supply pipe  21  between the process chamber  5  and the valve  22  shown in  FIG. 3 . The supply pipe (or the plurality of the gas supply pipes) may be connected to a gas supply source (or a plurality of gas supply sources: not shown) configured to supply the two or more kinds of gases through a valve (or valves) and an MFC (or MFCs) interposed therebetween in series from a downstream side (or downstream sides) to an upstream side (or upstream sides) of the supply pipe (or the plurality of the gas supply pipes). 
     According to the present embodiment, the gas introducer  20  is constituted by the supply pipe  21 , the valve  22  and the MFC  23  shown in  FIG. 3 . The gas introducer  20  may further include the gas supply source (not shown). 
     Instead of the nitrogen gas, a rare gas such as argon (Ar) gas, helium (He) gas, neon (Ne) gas, and xenon (Xe) gas may be used as the inert gas supplied through the gas introducer  20 . 
     Configuration of Temperature Meter  16   
     As shown in  FIG. 3 , the ceiling of the process chamber  5  is sealed by the cap flange  55 , and a temperature meter (which is a temperature measuring structure)  16  is arranged on the cap flange  55 . A non-contact type temperature sensor may be used as the temperature meter  16 . The temperature meter  16  is configured to generate temperature information of an inner temperature of the process chamber  5  by measuring the inner temperature of the process chamber  5 , and a flow rate of a cooling gas introduced through the gas introducer  20  may be adjusted based on the temperature information of the inner temperature of the process chamber  5 . In addition, the temperature meter  16  is configured to generate temperature information of the wafer  2  by measuring a temperature of the wafer  2 , and parameters such as an output of the electromagnetic wave supplier  90  may be adjusted based on the temperature information of the wafer  2 . As a result, a heating temperature of the wafer  2  is adjusted, and a temperature distribution in the process chamber  5  (that is, a temperature distribution of the wafer  2 ) is optimized. As the temperature sensor serving as the temperature meter  16 , for example, a radiation thermometer (IR: infrared radiation) may be practically used. A surface temperature of the wafer  2  is measured by the radiation thermometer. When the boat  8  is provided with the susceptor  81 , a surface temperature of the susceptor  81  is measured by the radiation thermometer. 
     In the description of the present embodiment, the term “temperature of the wafer  2 ” (or wafer temperature) may indicate a wafer temperature converted by temperature conversion data (that is, an estimated wafer temperature), or may indicate a temperature obtained directly by measuring the temperature of the wafer  2  by the temperature meter  16 , or may indicate both of them. 
     The temperature conversion data may be stored in advance in a memory  103  of a controller  100  or may be stored in an external memory  105  provided outside the controller  100  shown in  FIG. 7 . By acquiring the transition of the temperature change for each of the susceptor  81  and the wafer  2  shown in  FIG. 3  and deriving a correlation between the temperature of the susceptor  81  and the temperature of the wafer  2  from the transition of the temperature change, the temperature conversion data may be obtained. 
     By preparing the temperature conversion data in advance as described above, it is possible to estimate the temperature of the wafer  2  by measuring the temperature of the susceptor  81 . It is also possible to control the output of the electromagnetic wave supplier  90  to control a process temperature based on the estimated temperature of the wafer  2 . 
     While the present embodiment is described by way of an example in which the radiation thermometer described above is used as the temperature meter  16 , the present embodiment is not limited thereto. For example, a thermocouple may be used as the temperature meter  16  to measure the temperature of the wafer  2 , or both the thermocouple and the temperature sensor (non-contact type thermometer) may be used as the temperature meter  16  to measure the temperature of the wafer  2 . However, when the thermocouple is used as the temperature meter  16 , the thermocouple is disposed in the vicinity of the wafer  2  to measure the temperature the wafer  2 . Therefore, the thermocouple itself is heated by the microwave supplied from the electromagnetic wave supplier  90 . As a result, it is difficult to accurately measure the temperature of the wafer  2 . Therefore, it is preferable to use the non-contact type thermometer as the temperature meter  16 . 
     While the present embodiment is described by way of an example in which the temperature meter  16  is provided at the cap flange  55 , the present embodiment is not limited thereto. For example, the temperature meter  16  may be provided at the mounting table  56 . For example, instead of directly providing the temperature meter  16  at the cap flange  55  or the mounting table  56 , the temperature meter  16  may measure the temperature of the wafer  2  indirectly by measuring the radiation light reflected by the components such as a mirror and emitted through a measurement window provided in the cap flange  55  or the mounting table  56 . While the present embodiment is described by way of an example in which one temperature meter  16  is provided in the process chamber  5 , the present embodiment is not limited thereto. For example, a plurality of temperature meters may be provided in the process chamber  5 . 
     Configuration of Electromagnetic Wave Supplier  90   
     As shown in  FIG. 3 , electromagnetic wave introduction ports  90   b  that penetrate from inside to outside of the process chamber  5  (that is, the process chamber  51 ) is arranged on the side wall of the process housing  53  opposite to the transfer chamber  4 . According to the present embodiment, for example, two electromagnetic wave introduction ports  90   b  are arranged in the vertical direction and two electromagnetic wave introduction ports  90   b  are arranged in the horizontal direction. That is, a total of four electromagnetic wave introduction ports  90   b  are arranged (only two are shown in  FIG. 3 ). Each of the electromagnetic wave introduction ports  90   b  is of a rectangular shape whose longitudinal direction is a left-right direction when viewed from the transfer chamber  4  toward the process chamber  5 . The number and the shape of the electromagnetic wave introduction ports  90   b  are not particularly limited. 
     One end of each of waveguides  90   a  is connected to each of the electromagnetic wave introduction ports  90   b , and the other end of each of the waveguides  90   a  is connected to the electromagnetic wave supplier  90 . According to the present embodiment, the microwave generators  91  and  92  are used as the electromagnetic wave supplier  90 . The microwave generator  91  arranged on the upper portion of the process chamber  5  is connected to the electromagnetic wave introduction ports  90   b  through an upper one of the waveguides  90   a . The microwave transmitted by the microwave generator  91  is supplied into the process chamber  5  through the upper one of the waveguides  90   a  and the electromagnetic wave introduction ports  90   b . The microwave generator  92  arranged on the lower portion of the process chamber  5  is connected to the electromagnetic wave introduction ports  90   b  through a lower one of the waveguides  90   a . The microwave transmitted by the microwave generator  92  is supplied into the process chamber  5  through the lower one of the waveguides  90   a  and the electromagnetic wave introduction ports  90   b.    
     For example, a magnetron or a klystron may be used as the microwave generators  91  and  92 . Preferably, a frequency of the microwave generated by each of the microwave generators  91  and  92  is controlled such that the frequency is within a range from 13.56 MHz to 24.125 GHz. More preferably, the frequency is controlled to a frequency of 2.45 GHz or less or a frequency of 5.8 GHz or less. 
     While the present embodiment is described by way of an example in which the frequency of the microwave generated by the microwave generator  91  is equal to the frequency of the microwave generated by the microwave generator  92 , the present embodiment is not limited thereto. For example, the frequency of the microwave generated by the microwave generator  91  may be different from the frequency of the microwave generated by the microwave generator  92 . In addition, the electromagnetic wave supplier  90  may include one microwave generator for the process chamber  5 , or may include two, three or equal to or more than five microwave generators for the process chamber  5 . For example, the microwave generator  91  may be arranged on the side wall of the process chamber  5 , and the microwave generator  92  may be arranged on another side wall of the process chamber  5  facing the side wall of the process chamber  5  on which the microwave generator  91  is arranged. As shown in  FIGS. 3 and 8 , the electromagnetic wave supplier  90  is connected to the controller  100  serving as a control apparatus. Specifically, as shown in  FIG. 7 , the electromagnetic wave supplier  90  (that is, the microwave generators  91  and  92 ) is connected to the controller  100 , and the controller  100  is connected to the temperature meter  16 . When the temperature of the wafer  2  (that is, the inner temperature of the process chamber  5 ) is measured by the temperature meter  16  in the process chamber  5 , the measured inner temperature is transmitted to the controller  100  as the temperature information. The controller  100  is configured to control the outputs of the microwave generators  91  and  92  based on the temperature information, and is configured to control the heating temperature of the wafer  2  (the process temperature of the wafer  2 ). 
     In order to control the outputs of the microwave generators  91  and  92 , for example, a voltage input level of each of the microwave generators  91  and  92  may be adjusted or a voltage input duration (that is, a ratio of the power ON time and the power OFF time) of each of the microwave generators  91  and  92  may be adjusted. According to the present embodiment, the microwave generators  91  and  92  are controlled by the same control signal transmitted from the controller  100 . However, the present embodiment is not limited thereto. For example, the microwave generator  91  and the microwave generator  92  may be individually controlled by individual control signals transmitted from the controller  100  to the microwave generator  91  and the microwave generator  92 , respectively. 
     Configuration of Controller  100   
     As shown in  FIG. 7 , the controller  100  is constituted by a central processing unit (CPU)  101 , a random access memory (RAM)  102 , the memory  103  and an input/output (I/O) port  104 . That is, the controller  100  is configured as a computer. In the description of the present embodiment, the central processing unit  101  is simply referred to as the CPU  101 , the random access memory  102  is simply referred to as the RAM  102 , and the input/output port  104  is simply referred to as the I/O port  104 . 
     The CPU  101  is connected to each of the RAM  102 , the memory  103  and the I/O port  104  through an internal bus  110 , and is configured to exchange (that is, transmit or receive) various information with each of the RAM  102 , the memory  103  and the I/O port  104 . An input/output device  106  is connected to the controller  100  through the internal bus  110 . As the input/output device  106 , a component such as a touch panel, a keyboard and a mouse may be used. As the memory  103 , for example, a component such as a flash memory and a hard disk drive (HDD) may be used. 
     For example, a control program for controlling the operation of the substrate processing apparatus  1  and a process recipe containing information on the sequences and the conditions of the annealing process (modification process) of the substrate processing are readably stored in the memory  103 . The process recipe is obtained by combining steps of the substrate processing such that the controller  100  can execute the steps to acquire a predetermine result, and functions as a program (software). 
     In the description of the present embodiment, the control program and the process recipe may be collectively or individually referred to as a “program”. The process recipe may be simply referred to as a “recipe”. In the present specification, the term “program” may indicate only the recipe, may indicate only the control program, or may indicate both of the recipe and the control program. The RAM  102  functions as a memory area (work area) where a program or data read by the CPU  101  is temporarily stored. 
     The I/O port  104  is connected to the above-described components such as the MFC  23 , the valve  22 , a pressure sensor  15 , the pressure regulator  13 , the electromagnetic wave supplier  90 , the temperature meter  16 , the vacuum pump  14 , the vertical driving structures  44 , the driving structure  59 , the detection sensors  46   a  and the detection sensors  46   b . An external bus  111  is used to connect the I/O port  104  to the components described above. 
     The CPU  101  of the controller  100  is configured to read a control program from the memory  103  and execute the read control program. Furthermore, the CPU  101  is configured to read a recipe from the memory  103  according to an operation command inputted from the input/output device  106 . 
     According to the contents of the read recipe, the CPU  101  may be configured to control various operations such as a flow rate adjusting operation for various gases by the MFC  23 , an opening/closing operation of the valve  22 , a pressure adjusting operation by the pressure regulator  13  based on the pressure sensor  15 , a start and stop of the vacuum pump  14 . The CPU  101  may be configured to further control an output adjusting operation by the electromagnetic wave supplier  90  based on the temperature meter  16 . In addition, the CPU  101  may be configured to further control various operations such as a rotating operation, a rotation speed adjusting rotation and an elevating and lowering operation of the mounting table  56  (or the boat  8 ) by the driving structure  59 . 
     The program stored in the external memory  105  is installed in the controller  100 . As the external memory  105 , for example, a magnetic disk such as a hard disk, an optical disk such as a magneto-optical (MO) disk or a compact disk (CD) may be used. In addition, as the external memory  105 , a semiconductor memory such as a universal serial bus (USB) memory may be used. 
     The memory  103  or the external memory  105  may be embodied by a non-transitory computer readable recording medium (or a non-transitory computer readable-and-writable recording medium) in which the program and the data are stored readable or writable. Hereafter, the memory  103  or the external memory  105  are collectively or individually referred to as recording media. In the description of the present embodiment, the term “recording medium” may indicate only the memory  103 , may indicate only the external memory  105  or may indicate both of the memory  103  or the external memory  105 . Instead of using the memory  103  or the external memory  105 , a communication means such as the Internet and a dedicated line may be used to provide the program to the controller  100 . 
     Substrate Processing 
     Subsequently, the substrate processing performed by the substrate processing apparatus  1  will be described using  FIG. 6  with reference to  FIGS. 1 through 5 . As the substrate processing according to the present embodiment, for example, a method (crystallization method) of modifying an amorphous silicon film formed on the wafer (substrate)  2 , which is a part of manufacturing processes of the semiconductor device, will be described. In the substrate processing, the operations of the components of the substrate processing apparatus  1  shown in  FIG. 8  are controlled by the controller  100  shown in  FIG. 7 . Since the same processing is performed in each of the process chambers  51  and  52  of the substrate processing apparatus  1  based on the same recipe, the processing using the process chamber  51  will be described, and the processing using the process chamber  52  will be omitted. 
     In the description of the present embodiment, the term “wafer  2 ” may refer to “the wafer  2  itself” or may refer to “the wafer  2  with a predetermined film (or stacked films) formed on the surface thereof”. In addition, “the surface of the wafer  2 ” may refer to “the surface of the wafer  2  itself” or may refer to “a surface of the predetermined film (or stacked films) formed on the wafer  2 ”. Thus, in the description of the present embodiment, “forming a predetermined layer on the surface of the wafer  2 ” may refer to “forming the predetermined layer on the surface of the wafer  2  itself” or may refer to “forming the predetermined layer on the surface of the predetermined film (or stacked films) formed on the wafer  2 ”. In the description of the present embodiment, “substrate” and “the wafer  2 ” may be used as substantially the same meaning. 
     (1) Substrate Take-Out Step (Step S 1 ) 
     The transfer structure  7  in the transfer chamber  4  of the substrate processing apparatus  1  shown in  FIG. 8  takes out a predetermined number of wafers including the wafer  2  to be processed are taken out of the pod  3  opened by the loading port structure  6 . Then, the predetermined number of the wafers including the wafer  2  are placed on one or both of the tweezers  71  and  72 . 
     (2) Substrate Loading Step (Step S 2 ) 
     The wafer  2  placed on one of the tweezers  71  and  72  (or the predetermined number of the wafers including the wafer  200  placed on both of the tweezers  71  and  72 ) is transferred (loaded) into the process chamber  51  while the loading/unloading port  51   h  is opened by an opening/closing operation of the opening/closing structure  43  shown in  FIGS. 3 and 8  (wafer loading). After the wafer  2  is loaded into the process chamber  51 , the loading/unloading port  51   h  is closed by the opening/closing operation of the opening/closing structure  43 . 
     (3) Pressure and Temperature Adjusting (S 3 ) 
     Subsequently, an inner pressure of the process chamber  51  (also referred to as an “inner pressure of a furnace”) is adjusted to a predetermined pressure. For example, the inner pressure of the process chamber  51  is adjusted to a pressure of 10 Pa or more and 102,000 Pa or less. Specifically, the opening degree of the pressure regulator  13  is feedback-controlled based on the pressure information detected by the pressure sensor  15  to adjust the inner pressure of the process chamber  51  to the predetermined pressure while the vacuum pump  14  exhausts an inner atmosphere of the process chamber  51 . 
     In the step S 3 , simultaneously with adjusting the inner pressure of the process chamber  51 , the electromagnetic wave supplier  90  may be controlled as a preliminary heating such that the inner atmosphere of the process chamber  51  is heated to a predetermined temperature by transmitting the microwave from the microwave generators  91  and  92 . For example, the microwave of 2.45 GHz and 1 kW or more and 30 kW or less is transmitted by the microwave generators  91  and  92 . When the inner temperature the process chamber  51  is elevated to a predetermined substrate processing temperature, in order to prevent the wafer  2  from being deformed or damaged, it is preferable to elevate the inner temperature of the process chamber  51  while the output of the electromagnetic wave supplier  90  is controlled to be less than that of the electromagnetic wave supplier  90  when the modification process described later is performed. In addition, when the substrate processing is performed under the atmospheric pressure, an inert gas supply (step S 4 ) described later may be performed after adjusting only the inner temperature of the process chamber  51  without adjusting the inner pressure of the process chamber  51 . 
     (4) Inert Gas Supply (Step S 4 ) 
     After the inner pressure and the inner temperature of the process chamber  51  are adjusted to predetermined values by performing the step S 3 , the driving structure  59  rotates the shaft  58  to rotate the wafer  2  accommodated in the boat  8  on the mounting table  56 . While the driving structure  59  rotates the wafer  2 , the inert gas serving as the cooling gas is supplied into the process chamber  51  through the gas introducer  20 . For example, the nitrogen gas is used as the inert gas. Specifically, the nitrogen gas is supplied from the gas supply source (not shown) into the standby region  57  at a lower portion of the process chamber  51  through the supply port  21   a  of the supply pipe  21  with the MFC  23  and the valve  22  interposed therebetween. 
     In the step S 4 , the operation of the exhauster  10  shown in  FIG. 3  is started to exhaust the inner atmosphere of the process chamber  51 . Specifically, the operation of the vacuum pump  14  of the exhauster  10  is started, and the inner atmosphere of the process chamber  51  is exhausted by the vacuum pump  14  through the exhaust port  11   a  of the exhaust pipe  11  with the valve  12  and the pressure regulator  13  interposed therebetween. For example, the inner pressure of the process chamber  51  is adjusted to 10 Pa or more and 102,000 Pa or less, preferably 101,300 Pa or more and 102,000 Pa or less. 
     (5) Start of Modification Step (Step S 5 ) 
     While maintaining the inner pressure of the process chamber  51  at a predetermined pressure, the microwave is supplied into the process chamber  51  by the electromagnetic wave supplier  90 . By supplying the microwave into the process chamber  51 , the wafer  2  is heated to a temperature of 100° C. or more and 1,000° C. or less, preferably 400° C. or more and 900° C. or less. It is more preferable that the wafer  2  is heated to a temperature of 500° C. or more and 700° C. or less. 
     By performing the substrate processing at the temperature described above, it is possible to for the wafer  2  to efficiently absorb the microwave. Therefore, it is possible to improve the process speed of the modification process of the substrate processing. In other words, when the wafer  2  is processed at a temperature lower than 100° C. or higher than 1,000° C., the surface of the wafer  2  is deformed, so that the microwave is hardly absorbed on the surface of the wafer  2 . Thus, it may be difficult to efficiently heat the wafer  2 . 
     In the modification step, the controller  100  determines whether or not the microwave leaking from the process chamber  51  through the loading/unloading port  51   h  and the opening/closing structure  43  is detected by the detection sensors  46   a  shown in  FIG. 2  (step S 6 ). Specifically, when at least one of the detection sensors  46   a  detects the microwave at a predetermined level (for example, 5 mW/cm 2  or higher), the controller  100  determines that the microwave leaking from the process chamber  51  is detected by the detection sensors  46   a.    
     When the controller  100  determines that the microwave is detected by the detection sensors  46   a , the controller  100  further determines whether or not the detected state has continued for a threshold time (for example, 5 seconds) (step S 7 ). Specifically, when a time duration in which the microwave above the predetermined level continues to be detected by at least one of the detection sensors  46   a  has reached the threshold time, the controller  100  determines that the microwave is leaking. When it is determined that the microwave is leaking, the controller  100  stops the transmission of the microwave by the microwave generators  91  and  92  (step S 8 ). Then, a series of operations of determining the microwave leakage may be completed. 
     When the controller  100  determines that the microwave is not detected by any of the detection sensors  46   a  in the step S 6  or when the controller  100  determines that the microwave is not leaking in the step S 7 , the controller  100  further determines whether or not the modification step is completed (step S 9 ). Specifically, it is determined whether or not a pre-set process time has elapsed, and when the process time has not elapsed (that is, when the modification step has not been completed), the step S 6  is performed again. By performing the modification step, the wafer  2  is heated, and the amorphous silicon film formed on the surface of the wafer  2  is modified (crystallized) into a polysilicon film. That is, it is possible to form a uniformly crystallized polysilicon film on the wafer  2 . On the other hand, when it is determined that the process time has elapsed, the rotation of the boat  8 , the supply of the cooling gas, the supply of the microwave and the exhaust of the process chamber  5  are stopped, and the modification step is completed. 
     (6) Inert Gas Supply (Step S 10 ) 
     When it is determined in the step S 9  that the modification step is completed, the inner pressure of the process chamber  51  is adjusted to be lower than an inner pressure of the transfer chamber  4  by adjusting the pressure regulator  13 . Then, the opening/closing structure  43  is opened. Thus, the purge gas circulating inside the transfer chamber  4  is exhausted from the lower portion toward the upper portion of the process chamber  51 . As a result, it is possible to effectively suppress the heat build-up in the upper portion of the process chamber  51 . 
     (7) Substrate Unloading Step (Step S 11 ) 
     By opening the opening/closing structure  43 , the process chamber  51  is in communication with the transfer chamber  4 . Thereafter, the wafer  2  accommodated in the boat  8  after the modification step is transferred out of the process chamber  51  into the transfer chamber  4  by the tweezers  71  and  72  of the transfer structure  7 . 
     (8) Substrate Cooling Step (Step S 12 ) 
     The wafer  2  unloaded by the tweezers  71  and  72  is moved to the cooling chamber  9  by consecutive operations of the transfer device  73  and the transfer device elevator  74 . Then, the wafer  2  is placed on the wafer cooling retainer  9   b  by the tweezer  71 . 
     According to the present embodiment, the wafer cooling retainer  9   b  may include a top plate of a disk shape above the wafer cooling table  9   a  on which the wafer  2  is placed. A diameter of the top plate may be equal to or greater than a diameter of the wafer  2 . Thereby, a downflow (DF shown in  FIG. 8 ) from an upper portion of transfer housing  41  is not directly sprayed on the wafer  2 . As a result, it is possible to suppress the non-uniform cooling of the wafer  2  due to the rapid cooling, and it is also possible to effectively prevent (or suppress) the wafer  2  from being deformed. 
     (9) Substrate Accommodating Step (Step S 13 ) 
     The wafer  2  cooled in the cooling chamber  9  is accommodated in a predetermined position by consecutive operations of the transfer device  73  and the transfer device elevator  74 . While the present embodiment is described by way of an example in which the substrate processing is performed in the process chamber  51  described above shown in  FIG. 4  with the boat  8  accommodating three wafers including the wafer  2  disposed in the process chamber  51 , the present embodiment is not limited thereto. For example, the number of the wafers accommodated in the boat  8  is not limited to three. For example, two wafers including the wafer  2  may be accommodated in the boat  8  of the process chamber  51  and the boat  8  of the process chamber  52 , respectively, and the same substrate processing may be performed in parallel. Then, and then two wafers including the wafer  2  may be cooled. 
     Effects According to First Embodiment 
     According to the first embodiment, it is possible to provide one or more advantageous effects described below. 
     (1) According to the first embodiment, the detection sensors  46   a  and the detection sensors  46   b  are arranged around the loading/unloading ports  51   h  and  52   h  in the transfer chamber  4 . Therefore, it is possible to prevent the electronic components arranged inside the transfer chamber  4  from malfunctioning or being damaged due to the microwave leakage into the transfer chamber  4 . 
     (2) According to the first embodiment, the plurality of the detection sensors (for example, three detection sensors)  46   a  and the plurality of the detection sensors (for example, three detection sensors)  46   b  are arranged around the loading/unloading ports  51   h  and  52   h  in the transfer chamber  4 . Therefore, it is possible to suppress the erroneous detection as compared with a case where only one detection sensor configured to detect the microwave is provided. In other words, it is possible to improve the detection accuracy of detecting the microwave leakage by using the detection sensors  46   a  and the detection sensors  46   b.    
     (3) According to the first embodiment, when the time duration in which the microwave continues to be detected by at least one of the detection sensors  46   a  has reached the threshold time, the controller  100  determines that the microwave is leaking. Therefore, it is possible to suppress the erroneous detection as compared with a case where it is determined that the microwave is leaking only by detecting the microwave by the detection sensors. In other words, it is possible to improve the detection accuracy of detecting the microwave leakage. 
     (4) According to the first embodiment, since the detection accuracy of detecting the microwave leakage is improved, it is possible to suppress stopping of the apparatus such as the substrate processing apparatus  1  due to the erroneous detection of the microwave leakage. As a result, it is possible to shorten the time (which is a cycle time) of performing the substrate processing. 
     (5) According to the first embodiment, the microwave generators  91  and  91  are arranged so as to face the loading/unloading ports  51   h  and  52   h  with the process chamber  5  interposed therebetween. Therefore, the detection sensors  46   a  and the detection sensors  46   b  can detect the microwave transmitted from the microwave generators  91  and  91  and leaking through the loading/unloading ports  51   h  and  52   h.    
     (6) According to the first embodiment, the range within which the detection sensors (for example, three detection sensors)  46   a  are arranged in the vertical direction covers the opening area of the loading/unloading port  51   h . Therefore, it is possible to improve the detection accuracy of detecting the microwave leakage as compared with a case where a range within which detection sensors are arranged in the vertical direction fails to cover the opening area of a loading/unloading port. 
     Second Embodiment 
     An example of a substrate processing apparatus, a method of manufacturing a semiconductor device and a non-transitory computer-readable recording medium according to the second embodiment described herein will be described. Specifically, the substrate processing performed by the substrate processing apparatus  1  according to the second embodiment will be described with reference to a flow chart shown in  FIG. 9 . Hereinafter, the difference between the second embodiment and the first embodiment will be mainly described. 
     A substrate take-out step (step S 21 ) of the second embodiment is substantially the same as the substrate take-out step (step S 1 ) of the first embodiment, and a substrate loading step (step S 22 ) of the second embodiment is substantially the same as the substrate loading step (step S 2 ) of the first embodiment. An inner pressure and inner temperature of furnace adjusting (step S 23 ) of the second embodiment is substantially the same as the inner pressure and the inner temperature of the furnace adjusting (step S 3 ) of the first embodiment, and an inert gas supply (step S 24 ) of the second embodiment is substantially the same as the inert gas supply (step S 4 ) of the first embodiment. 
     (1) Start of Modification Step (Step S 25 ) 
     While maintaining the inner pressure of the process chamber  51  at a predetermined pressure, the microwave is supplied into the process chamber  51  by the electromagnetic wave supplier  90 . By supplying the microwave into the process chamber  51 , the wafer  2  is heated to a temperature of 100° C. or more and 1,000° C. or less, preferably 400° C. or more and 900° C. or less. It is more preferable that the wafer  2  is heated to a temperature of 500° C. or more and 700° C. or less. 
     By performing the substrate processing at the temperature described above, it is possible to for the wafer  2  to efficiently absorb the microwave. Therefore, it is possible to improve the process speed of the modification process of the substrate processing. In other words, when the wafer  2  is processed at a temperature lower than 100° C. or higher than 1,000° C., the surface of the wafer  2  is deformed, so that the microwave is hardly absorbed on the surface of the wafer  2 . Thus, it may be difficult to efficiently heat the wafer  2 . 
     In the modification step, the controller  100  determines whether or not the microwave leaking from the process chamber  51  through the loading/unloading port  51   h  and the opening/closing structure  43  is detected by at least one of the detection sensors  46   a  (step S 26 ). Specifically, when at least one of the detection sensors  46   a  detects the microwave at a predetermined level (for example, 5 mW/cm 2  or higher), the controller  100  determines that the microwave leaking from the process chamber  51  is detected by at least one of the detection sensors  46   a.    
     When the controller  100  determines that the microwave is detected by at least one of the detection sensors  46   a , the controller  100  further determines whether or not the number of the detection sensors  46   a  that detected the microwave is two or more (step S 27 ). 
     When the controller  100  determines that the number of the detection sensors  46   a  that detected the microwave is two or more, the controller  100  further determines whether or not the detected state has continued for a threshold time (for example, 5 seconds) (step S 28 ). Specifically, when each time duration in which the microwave above the predetermined level continues to be detected by two or more detection sensors has reached the threshold time, the controller  100  determines that the microwave is leaking. In other words, when each of the two or more detection sensors continues to detect the microwave above the predetermined level over a time duration longer than the threshold time, the controller  100  determines that the microwave is leaking. 
     When it is determined that the microwave is leaking, the controller  100  is configured to stop the transmission of the microwave by the microwave generators  91  and  92  (step S 29 ). Then, a series of operations of determining the microwave leakage may be completed. 
     When (i) the controller  100  determines that the microwave is not detected by any of the detection sensors  46   a  in the step S 26 , or (ii) the controller  100  determines that only one of the detection sensors  46   a  detected the microwave in the step S 27 , or (iii) the controller  100  determines that the microwave is not leaking in the step S 28 , the controller  100  further determines whether or not the modification step is completed (step S 30 ). Specifically, it is determined whether or not a pre-set process time has elapsed. When the process time has not elapsed (that is, when the modification step has not been completed), the step S 26  is performed again. By performing the modification step, the wafer  2  is heated, and the amorphous silicon film formed on the surface of the wafer  2  is modified (crystallized) into a polysilicon film. That is, it is possible to form a uniformly crystallized polysilicon film on the wafer  2 . 
     On the other hand, when it is determined that the process time has elapsed, the rotation of the boat  8 , the supply of the cooling gas, the supply of the microwave and the exhaust of the process chamber  5  are stopped, and the modification step is completed. 
     An inert gas supply (step S 31 ) of the second embodiment after the modification step is completed is substantially the same as the inert gas supply (step S 10 ) of the first embodiment, and a substrate unloading step (step S 32 ) of the second embodiment is substantially the same as the substrate unloading step (step S 11 ) of the first embodiment. A substrate cooling step (step S 33 ) of the second embodiment is substantially the same as the substrate cooling step (step S 12 ) of the first embodiment, and a substrate accommodating step (step S 34 ) of the second embodiment is substantially the same as the substrate accommodating step (step S 13 ) of the first embodiment. 
     Effects According to Second Embodiment 
     (1) According to the second embodiment, when two or more of the detection sensors  46   a  detect the microwave and each time duration in which the microwave continues to be detected by the two or more detection sensors has reached the threshold time, the controller  100  determines that the microwave is leaking. Therefore, it is possible to suppress the erroneous detection as compared with a case where it is determined that the microwave is leaking when only one of the detection sensors  46   a  detected the microwave and the time duration in which the microwave continues to be detected by the only detection sensor has reached the threshold time. In other words, it is possible to improve the detection accuracy of detecting the microwave leakage by using the detection sensors  46   a.    
     The other effects according to the second embodiment are the same as those of the first embodiment. 
     Other Embodiments 
     While the technique is described in detail by way of the above-described embodiments, the above-described technique is not limited thereto. It is apparent to the person skilled in the art that the above-described technique may be modified in various ways without departing from the scope thereof. For example, the first embodiment and the second embodiment described above are described by way of an example in which three detection sensors serving as the detection sensors  46   a  and three detection sensors serving as the detection sensors  46   b  configured to detect the microwave leaking to the transfer chamber  4  through the loading/unloading ports  51   h  and  52   h  are installed. However, the above-described technique is not limited thereto. For example, the above-described technique may be applied when a single detection sensor is installed to detect the microwave leaking to the transfer chamber  4  through the loading/unloading port  51   h  and a single detection sensor is installed to detect the microwave leaking to the transfer chamber  4  through the loading/unloading port  52   h . Further, the above-described technique may also be applied when two detection sensors serving as the detection sensors  46   a  and two detection sensors serving as the detection sensors  46   b  are installed, or when four or more detection sensors serving as the detection sensors  46   a  and four or more detection sensors serving as the detection sensors  46   b  are installed. 
     For example, the first embodiment and the second embodiment described above are described by way of an example in which the detection sensors  46   a  and the detection sensors  46   b  are installed on the sides of the loading/unloading ports  51   h  and  52   h . However, the above-described technique is not limited thereto. For example, the above-described technique may be applied when the detection sensors  46   a  and the detection sensors  46   b  are installed above the loading/unloading ports  51   h  and  52   h  as shown in  FIG. 10 . 
     When the detection sensors  46   a  and the detection sensors  46   b  are installed above the loading/unloading ports  51   h  and  52   h , a range within which the detection sensors (for example, three detection sensors)  46   a  and the detection sensors (for example, three detection sensors)  46   b  are arranged in the apparatus depth direction covers the opening areas of the loading/unloading ports  51   h  and  52   h . Therefore, it is possible to improve the detection accuracy of detecting the microwave leakage as compared with a case where a range within which detection sensors are arranged in the apparatus depth direction fails to cover the opening areas of the loading/unloading ports  51   h  and  52   h.    
     For example, the second embodiment described above is described by way of an example in which, when two or more of the detection sensors  46   a  detect the microwave and each time duration in which the microwave continues to be detected by the two or more detection sensors has reached the threshold time, the controller  100  determines that the microwave is leaking. However, the above-described technique is not limited thereto. For example, the above-described technique may be applied when the controller  100  determines that the microwave is leaking when the majority of the plurality of the detection sensors detect the microwave and each time duration in which the microwave continues to be detected by the majority of the plurality of the detection sensors has reached the threshold time. 
     For example, the first embodiment and the second embodiment described above are described by way of an example in which the modification process of modifying the amorphous silicon film formed on the wafer  2  into the polysilicon film is performed. However, the above-described technique is not limited thereto. 
     More specifically, for example, the above-described technique may be applied when a film formed on a surface of a substrate is modified by supplying a gas containing at least one selected from the group of oxygen (O), nitrogen (N), carbon (C), hydrogen (H) and the like. For example, when a hafnium oxide film (HfxOy film) serving as a high dielectric constant film is formed on the wafer, it is possible to improve the characteristics of the high dielectric constant film by supplying a gas containing oxygen and the heating the gas containing oxygen and the hafnium oxide film by supplying the microwave to replenish the deficient oxygen in the hafnium oxide film. While the hafnium oxide film is exemplified above, the above-described technique may also be applied when an oxide film (that is, a metal-based oxide film) containing at least one metal element selected from the group of aluminum (Al), titanium (Ti), zirconium (Zr), tantalum (Ta), niobium (Nb), lanthanum (La), cerium (Ce), yttrium (Y), barium (Ba), strontium (Sr), calcium (Ca), lead (Pb), molybdenum (Mo), tungsten (W) and the like. 
     That is, the above-described technique may also be applied to modify a film formed on the wafer  2 , such as a TiOCN film, a TiOC film, a TiON film, a TiO film, a ZrOCN film, a ZrOC film, a ZrON film, a ZrO film, an HfOCN film, an HfOC film, an HfON film, an HfO film, a TaOCN film, a TaOC film, a TaON film, a TaO film, a NbOCN film, a NbOC film, a NbON film, a NbO film, a AlOCN film, a AlOC film, a AlON film, a AlO film, a MoOCN film, a MoOC film, a MoON film, a MoO film, a WOCN film, a WOC film, a WON film and a WO film. 
     Further, the above-described technique may also be applied when a film containing silicon as a main component and doped with impurities is heated instead of the high dielectric constant film. As the film containing silicon as the main component, a silicon-based film such as a silicon nitride film (SiN film), a silicon oxide film (SiO film), a silicon oxycarbide film (SiOC film), a silicon oxycarbonitride film (SiOCN film) and a silicon oxynitride film (SiON film) may be used. As the impurities, for example, at least one selected from the group of boron (B), carbon (C), nitrogen (N), aluminum (Al), phosphorus (P), gallium (Ga), arsenic (As) and the like may be used. 
     Further, for example, the above-described technique may also be applied to a photoresist film based on at least one selected from the group of methyl methacrylate resin (PMMA: Polymethylmethacrylicate), epoxy resin, novolak resin, polyvinyl phenyl resin and the like. 
     Further, for example, the above-described technique may be applied to a substrate processing such as a patterning process of manufacturing processes of a liquid crystal panel, a patterning process of manufacturing processes of a solar cell and a patterning process of manufacturing processes of a power device. 
     As described above, according to some embodiments in the present disclosure, it is possible to prevent the electronic components arranged inside the transfer chamber from malfunctioning or being damaged due to the microwave leakage into the transfer chamber.