Patent Publication Number: US-2021166960-A1

Title: Jig, processing system and processing method

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This patent application claims priority to Japanese Patent Application No. 2019-217362, filed Nov. 29, 2019, and Japanese Patent Application No. 2020-169174, filed Oct. 6, 2020, the entire contents of which are incorporated herein by reference in their entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to a jig, a processing system, and a processing method. 
     BACKGROUND 
     Japanese Unexamined Patent Publication No. 2011-517097, which is hereinafter referred to as Patent document 1, discloses a plasma processing apparatus having a chamber connected to an optical emission spectrometer. The plasma processing apparatus monitors and controls a process through analysis of intensity of a spectrum created in the chamber. Japanese Translation of PCT International Application Publication No. 2018-91836, which is hereinafter referred to Patent document 2, discloses a system in which an optical calibration apparatus with a light source such as a xenon lamp that provides a continuous spectrum is disposed in a chamber. The system calibrates the optical calibration apparatus. 
     The present disclosure provides a technique that increases analytic accuracy of emission intensity. 
     SUMMARY 
     According to one aspect in the present disclosure, a jig is provided, including a base; light sources disposed on the base, the sources being configured to emit light of different wavelengths; a controller disposed on the base, the controller being configured to cause the light sources to be turned on or off based on a given program; and a power source disposed on the base, the power source being configured to supply power to the light sources and the controller, wherein the jig has a shape enabling a transfer device to transfer the jig, the transfer device being provided in a vacuum transfer module and configured to transfer a substrate. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a cross-sectional view schematically illustrating an example of a jig according to an embodiment; 
         FIG. 2  is a diagram illustrating an example of a plasma processing apparatus according to the embodiment; 
         FIG. 3  is a diagram illustrating an example of a semiconductor manufacturing apparatus according to the embodiment; 
         FIG. 4  is a diagram illustrating an example of a hardware configuration of a given processing system including a given semiconductor manufacturing apparatus according to the embodiment; 
         FIG. 5  is a diagram illustrating an example of a hardware configuration of a given processing system including a given semiconductor manufacturing apparatus according to the embodiment; 
         FIG. 6  is a diagram illustrating an example of the operation of the processing system according to the embodiment; 
         FIG. 7  is a diagram illustrating an example of reference data according to the embodiment; 
         FIG. 8  is a diagram illustrating an example of the operation of an optical emission spectrometer according to the embodiment; 
         FIG. 9  is a diagram illustrating an example of the operation of the processing system according to the embodiment; 
         FIG. 10  is a diagram for describing another example of analysis using the processing system according to the embodiment; and 
         FIG. 11  is a cross-sectional view schematically illustrating another example of the jig according to the embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, one or more embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same components are denoted by the same numerals, and duplicate descriptions may be omitted. 
     Jig 
     A jig LW according to the embodiment will be described with reference to  FIG. 1 .  FIG. 1  is a cross-sectional diagram schematically illustrating an example of the jig LW according to the embodiment. The jig LW includes a base  11 , a control board  12 , a plurality of light sources  13   a  to  13   d  (which are also collectively referred to as “light sources  13 ”), batteries  19 , and a plurality of temperature sensors  14   a  to  14   d  (which are also collectively referred to as “temperature sensors  14 ”). 
     The base  11  is an evaluation substrate (e.g., bare silicon), and a disk-shaped wafer is used as an example of the evaluation substrate. The base  11  is distinguished from a substrate (e.g., product substrate). However, the shape of the base  11  is not limited to a disc shape. Any shape of the base  11  such as a polygon or an ellipse may be adopted when the base can be transferred by a transfer device that transfers the substrate. According to the embodiment, in a processing system described below, the jig LW has a shape enabling the transfer device, which is provided in a vacuum transfer module, to transfer the jig. In such a configuration, the jig LW can be transferred between an apparatus such as a plasma processing apparatus, and the transfer component, without breaking the vacuum. Examples of material of the evaluation substrate include silicon, carbon fiber, quartz glass, silicon carbide, silicon nitride, alumina, and the like. Preferably, the substrate material is a material having electrical conductivity and thermal conductivity. 
     The control board  12  is a circuit board disposed on the base  11 , and includes light sources  13   a  to  13   d , temperature sensors  14   a  to  14   d , a connector  21 , and control circuitry  200 . 
     The light sources  13   a  to  13   d  are disposed in the control board on the base  11 . The light sources  13   a , the light sources  13   b , the light sources  13   c , and the light sources  13   d  emit light of different wavelengths (i.e., different colors). The four light sources  13   a  are light sources each of which emits light of the same wavelength, and are arranged side by side. The four light sources  13   b  are light sources each of which emits light of the same wavelength, and are arranged side by side. The four light sources  13   c  are light sources each of which emits light of the same wavelength, and are arranged side by side. The four light sources  13   d  are light sources each of which emits light of the same wavelength, and are arranged side by side. 
     Four light sources  13  each of which emits light of the same wavelength are arranged side by side, for each wavelength. Thus, an amount of light of each wavelength can be increased, thereby enabling an optical emission spectrometer  100  to easily receive light through a window provided in a reference apparatus or a correction apparatus. However, the number of light sources  13  for each wavelength is not limited to four, and may be any number that is two or more. For a plurality of light sources per some wavelengths, the light sources  13   a , the light sources  13   b , the light sources  13   c , and the light sources  13   d , are spaced apart from each other. Further, for the light sources  13   a , the light sources  13   b , the light sources  13   c , and the light sources  13   d , the number of light sources for the same wavelength is not limited to two or more, and may be one when an amount of light emitted from a single light source is sufficient. In this case, one light source  13   a , one light source  13   b , one light source  13   c , and one light source  13   d  may be arranged side by side. 
     The light sources  13   a  to  13   d  are preferably positioned along the outermost perimeter of the base  11 . In such a manner, a given optical emission spectrometer  100  more easily receives light emitted from the light sources  13   a  to  13   d . However, the arrangement of the light sources  13   a  to  13   d  is not particularly restricted when such light sources are in the control board  12 . 
     Each of the light sources  13   a  to  13   d  is preferably a light emitting diode (LED) or an organic light emitting diode (OLE) (see  FIG. 4 ). 
     In the jig LW according to the embodiment, when the LED or the OLED is used as each of the light sources  13   a  to  13   d , an amount of light emitted from the light source can be prevented from being reduced over time. Also, accuracy of analysis by the optical emission spectrometer  100  can be prevented from being decreased. Further, by use of the LED or the OLED, the jig LW can be reduced in size. 
     The plurality of light sources  13   a  to  13   d  preferably have a wavelength range of from 200 nm to 850 nm. The light emitted from each of the light sources  13   a  to  13   d  is not limited to visible light, and may be ultraviolet or infrared. Note that each light source  13  may emit light having various wavelengths (colors), by using a white LED, for example. 
     Each of the light sources  13   a  to  13   d  is rotated and transferred to a location approaching the window of the chamber to which a given optical emission spectrometer  100  is attached. In this case, the optical emission spectrometer  100  easily receives light from each light source. Note that a notch  22  is formed at an edge of the base  11 , and the notch is configured to enable the rotation of the jig LW, which is transferred by the alignment device described below, to be controlled. 
     Each of temperature sensors  14   a  to  14   d  is disposed proximal to given light sources from among the light sources  13   a  to  13   d , and each temperature sensor corresponds to the given light sources. The temperature sensor  14   a  measures an ambient temperature of the light sources  13   a . The temperature sensor  14   b  measures an ambient temperature of the light sources  13   b . The temperature sensor  14   c  measures an ambient temperature of the light sources  13   c . The temperature sensor  14   d  measures an ambient temperature of the light sources  13   d.    
     The control circuitry  200  is disposed in the control board  12  on the base  11 , and includes a microcomputer  15 , a memory  16 , charge circuitry  18 , and the like. The control circuitry  200  turns on or off each of the light sources  13   a  to  13   d  based on a given program. The control circuitry  200  serves as a controller that controls each component of the jig LW. The control circuitry  200  controls turning on and off of each of the light sources  13   a  to  13   d , for example. The control circuitry  200  may control communication with other devices. 
     The connector  21  is a connector that connects with an external power source and is used to charge one or more batteries. Four batteries  19  are disposed on the base  11 . Each battery  19  supplies power to light sources  13   a  to  13   d  and the control circuitry  200 . Each battery  19  is an example of a power source that supplies power to a plurality of light sources and a controller. The number of batteries  19  is not limited to four as long as one or more batteries can support the maximum current of the light sources  13   a  to  13   d.    
     An acceleration sensor  17  is provided in the jig LW. The acceleration sensor  17  detects the inclination of the jig LW, as well as transfer movement of the jig LW in a given apparatus. 
     Plasma Processing Apparatus 
     In such a configuration, the jig LW can be transferred to a plasma processing apparatus that performs substrate processing, such as etching, or deposition.  FIG. 2  is a diagram illustrating an example of the plasma processing apparatus  10  according to the embodiment. The plasma processing apparatus  10  is used in an example of some plasma formation systems that is used to excite a plasma from a process gas. 
     In  FIG. 2 , the plasma processing apparatus  10  is a capacitively coupled plasma (CCP) apparatus, and a plasma P is formed between an upper electrode  3  and a stage ST, in a chamber  2 . The stage ST includes a lower electrode  4  and an electrostatic chuck  5 . During the process, a substrate is held on the lower electrode  4 . A window  101  through which light is transmissive is provided in the chamber  2 , and the optical emission spectrometer  100  is connected to the window  101  via an optical fiber  102 . When emission intensity of the plasma is analyzed using the optical emission spectrometer  100 , the substrate is held on the lower electrode  4 . A radio frequency (RF) source  6  is coupled to the upper electrode  3 , and a radio frequency (RF) source  7  is coupled to the lower electrode  4 . The RF source  6  and the RF source  7  may be set at different radio frequencies. In another example, the RF source  6  and the RF source  7  may be coupled to the same electrode. A direct current (DC) power source may be coupled to the upper electrode. A gas source  8  is connected to the chamber  2  to supply a process gas. An exhauster  9  is also connected to the chamber  2  to evacuate the interior of the chamber  2 . 
     The plasma processing apparatus  10  in  FIG. 2  includes an equipment controller (EC)  180  including a processor and a memory. The plasma processing apparatus  10  controls each component of the plasma processing apparatus to process the substrate with the plasma. 
     Semiconductor Manufacturing Apparatus 
     Hereafter, a semiconductor manufacturing apparatus  30  with plasma processing apparatuses  10  will be described with reference to  FIG. 3 .  FIG. 3  is a diagram illustrating an example of the semiconductor manufacturing apparatus  30  according to the embodiment. The semiconductor manufacturing apparatus  30  includes four plasma processing apparatuses  10  each of which has the configuration in  FIG. 2 . The respective plasma processing apparatuses  10  are indicated as plasma processing apparatus  10   a  to  10   d.    
     The semiconductor manufacturing apparatus  30  includes chambers  2   a  to  2   d  (which are also collectively referred to as “chambers  2 ”), which are provided in the respective plasma processing apparatuses  10   a  to  10   d . The semiconductor manufacturing apparatus  30  also includes a vacuum transfer module VTM, two load lock modules LLM, a loader module LM, and an alignment device ORT. The semiconductor manufacturing apparatus  30  further includes three load ports LP, and a machine controller (MC)  181 . 
     On each side of opposing sides of the vacuum transfer module VTM, two chambers from among the chambers  2   a  to  2   d  are arranged side by side, along the corresponding side of the vacuum transfer module VTM. In each of the chambers  2   a  to  2   d , predetermined processing is performed for a given substrate. Each gate valve V is openable and closable connected to between a given chamber from among the chambers  2   a  to  2   d , and the vacuum transfer module VTM. The interior of each of the chambers  2   a  to  2   d  is depressurized to be in a vacuum atmosphere. 
     A transfer device VA for transferring the substrate is disposed in an interior of the vacuum transfer module VTM. While holding the substrate on a pick at an arm tip, the transfer device VA can deliver the substrate between each of the chambers  2   a  to  2   d , and a given load lock module LLM. The transfer device VA can hold the jig LW on the arm pick and deliver the jig LW between each of the chambers  2   a  to  2   d  and a given load lock module LLM. 
     Each load lock module LLM is provided between the vacuum transfer module VTM and the loader module LM. The atmosphere of each load lock module LLM is switched between an air atmosphere and a vacuum atmosphere. The substrate is transferred between an air space of the loader module LM and a vacuum space of the vacuum transfer module VTM. 
     The interior of the loader module LM is maintained clean by a downflow, and the three load ports LP are provided on a sidewall of the loader module LM. A front opening unified pod (FOUP) is attached to each load port LP, where the FOUP accommodates, e.g., 25 substrates or is empty. A given substrate is transferred from a given load port LP to a given chamber from among the chambers  2   a  to  2   d . Further, after the substrate is processed, the processed substrate is transferred from a given chamber, from among the chambers  2   a  to  2   d , to a given load port LP. 
     A transfer device LA that transfers the substrate is disposed in an interior of the loader module LM. While holding the substrate on a pick at an arm tip, the transfer device LA can deliver the substrate between a given FOUP and a given load lock module LLM. While holding the jig LW on the pick at the arm tip, the transfer device LA can deliver the jig LW between a given chamber from among the chambers  2   a  to  2   d , and a given load lock module LLM. 
     The alignment device ORT, which adjusts a position of a given substrate, is provided on the loader module LM. The alignment device ORT is disposed on one end of the loader module LM, for example. The alignment device ORT detects a center position, eccentricity, and a notch position of the substrate. The transfer device LA, which is disposed in the loader module LM, adjusts the position of the substrate, based on a detected result at the alignment device ORT. The alignment device ORT detects a center position, eccentricity, and a notch position of the jig LW. The transfer device LA, which is disposed in the loader module LM, adjusts the position of the jig LW, based on a detected result at the alignment device ORT. 
     Note that the number of chambers  2   a  to  2   d , the number of load lock modules LLM, the number of loader modules LM, and the number of load ports LP are not limited to the numbers described in the embodiment, and any number may be adopted. The jig LW can be transferred in the same manner as the substrate. The jig LW has the shape enabling each of the transfer devices LA and VA to transfer the jig LW, where the transfer device VA is provided in the vacuum transfer module VTM. In such a manner, the jig LW can be transferred between a given plasma processing apparatus  10 , which is an example of a given apparatus, and the vacuum transfer module VTM, without breaking the vacuum. 
     The MC  181  includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and a hard disk drive (HDD). Note that the MC  181  may have another storage area in a solid state drive (SDD) or the like. 
     The CPU controls a substrate process in each of the chambers  2   a  to  2   d , in accordance with a recipe in which a process procedure and a process condition are set. The recipe is stored in a storage that includes the ROM, the RAM, or the HDD. A program, which is executed to control the process and transfer of a given substrate, is stored in the storage. A program that is executed to control a transfer process for the jig LW is stored in the storage. The CPU controls the transfer of the jig LW in accordance with a program in which a transfer procedure and condition of the jig LW is set. 
     The optical emission spectrometers  100   a  to  100   d  (which are collectively referred to as “optical emission spectrometers  100 ”) are respectively attached, through optical fibers  102 , to windows  101  provided in the chambers  2   a  to  2   d . Each window  101  transmits light. When the jig LW is mounted on a given stage ST and the light sources  13  provided in the jig LW are turned on, a given optical emission spectrometer  100  receives light emitted through a given window  101 . 
     In the semiconductor manufacturing apparatus, the jig LW may be disposed in a given FOUP or in the alignment device ORT. A given alignment device is disposed in a space in a transfer system such as the vacuum transfer module VTM, and the jig LW may be disposed in such an alignment device. When an amount of light emitted from the light sources  13   a  to  13   d  in the jig LW is sufficient for a given optical emission spectrometer  100  to perform analysis, analysis may be performed based on light emitted from the light sources  13   a  to  13   d , without rotating the jig LW. In this case, the alignment device ORT may not be used. 
     An example of the analysis at the optical emission spectrometer  100  includes a process monitor such as end point detection (EPD). When a given window becomes cloudy due to adherence or the like of a reaction product generated in the substrate processing, sensitivity of the optical emission spectrometer  100  is decreased. The sensitivity of the optical emission spectrometer  100  varies depending on a state in which a given optical fiber  102  connecting the chamber and the optical emission spectrometer  100  is drawn. 
     For the jig LW according to the embodiment, each optical emission spectrometer  100  can receive light in a state in which the light sources  13  are in the interior of a given chamber  2 . Without opening a cover of the chamber  2  to thereby become open to the atmosphere, the jig LW can be transferred to a given chamber  2  while the interior of the chamber  2  is maintained as a vacuum. Thus, sensitivity of the optical emission spectrometer  100  can be adjusted to an optimum value, and intensity of an emission signal can be stabilized. 
     In the embodiment, each window  101  has a double-window configuration in which each window has a honeycomb structure. In such a manner, plasmas and radicals are prevented from entering the window  101 , and an amount of the reaction product that adheres to the window  101  can be reduced as much as possible. Accordingly, intensity of light received at each optical emission spectrometer  100  can be prevented from being reduced. 
     Note that when a given plasma processing apparatus, from among the plasma processing apparatuses  10   a  to  10   d , processes a given substrate is a given chamber  2 , the jig LW is mounted on the stage ST in a different chamber  2  from the given plasma processing apparatus, and then a given optical emission spectrometer  100  may receive light through the different chamber  2 . 
     Processing System 
     Hereafter, a processing system  1   a  when acquiring reference data indicating emission intensity will be described with reference to  FIG. 4 .  FIG. 4  is a diagram illustrating an example of a hardware configuration of the processing system la including a semiconductor manufacturing apparatus  30   a  according to the embodiment. The processing system  1   a  includes the semiconductor manufacturing apparatus  30   a  and the jig LW. The semiconductor manufacturing apparatus  30   a  includes the chamber  2   a , the optical emission spectrometer  100   a , a personal computer (PC)  400 , transfer devices VA 1  and LA 1 , and an alignment apparatus ORT 1 . 
     The optical emission spectrometer  100   a  includes a measuring unit  103   a , a CPU  104   a , and a memory  105   a . The measuring unit  103   a  measures data indicating emission intensity from light emitted from the light sources  13  in the jig LW. The memory  105   a  stores a given program for analyzing data indicating emission intensity from light emitted from the light sources  13  that are provided in the jig LW. The CPU  104   a  executes the program stored in the memory  105   a  to measure light emitted from the light sources  13  in the jig LW, which is transferred to the chamber  2   a  in a reference plasma processing apparatus  10 . The CPU  104   a  also analyzes data indicating emission intensity. Data indicating measured emission intensity is stored in the memory  105   a , as reference data. 
     The PC  400  performs a control to cause the jig LW to be transferred between the chamber  2   a  of the reference plasma processing apparatus  10  and the vacuum transfer module VTM, while maintaining a reduced pressure environment of the chamber  2   a  (process chamber). The PC  400  also causes the jig LW to be transferred to the alignment device ORT 1  and causes the notch  22  to be rotated in a direction specified as a reference. Further, the PC  400  causes a rotated jig LW to be mounted on the stage ST. The jig LW turns on the light sources  13   a  at locations approaching the window  101   a  of the chamber  2   a . The measuring unit  103   a  receives light of a first wavelength that is emitted from the light sources  13   a , through the window  101   a . The CPU  104   a  analyzes emission intensity of the received light of the first wavelength. 
     Then, the PC  400  again causes the jig LW to be transferred to the alignment device ORT 1  and causes the notch  22  to be rotated in the direction specified as a reference. The PC  400  causes a rotated jig LW to be mounted on the stage ST. The jig LW turns on the light sources  13   b  at locations approaching the window  101   a  of the chamber  2   a . The measuring unit  103   a  receives light of a second wavelength that is emitted from the light sources  13   b , through the window  101   a . The CPU  104   a  analyzes emission intensity of the received light of the second wavelength. 
     Then, the PC  400  again causes the jig LW to be transferred to the alignment device ORT 1  and causes the notch  22  to be rotated in the direction specified as a reference. The PC  400  causes a rotated jig LW to be mounted on the stage ST. The jig LW turns on the light sources  13   c  at locations approaching the window  101   a  of the chamber  2   a . The measuring unit  103   a  receives light of a third wavelength that is emitted from the light sources  13   b , through the window  101   a . The CPU  104   a  analyzes emission intensity of the received light of the third wavelength. 
     Then, the PC  400  again causes the jig LW to be transferred to the alignment device ORT 1  and causes the notch  22  to be rotated in the direction specified as a reference. The PC  400  causes a rotated jig LW to be mounted on the stage ST. The jig LW turns on the light sources  13   d  at locations approaching the window  101   a  of the chamber  2   a . The measuring unit  103   a  receives light of a fourth wavelength that is emitted from the light sources  13   c , through the window  101   a . The CPU  104   a  analyzes emission intensity of the received light of the fourth wavelength. 
     Note that for light of the first wavelength from the light source  13   a , light of the fourth wavelength from the light source  13   d , light of the third wavelength from the light source  13   c , and light of the second wavelength from the light source  13   b , if the condition “the first wavelength&lt;the fourth wavelength&lt;the third wavelength&lt;the second wavelength” is satisfied, measurement is preferably performed in a clockwise direction. For example, the measuring unit  103   a  preferably measures light of respective wavelengths in order of the light sources  13   a  that emit light of the first wavelength, the light sources  13   d  that emit light of the fourth wavelength, the light sources  13   c  that emit light of the third wavelength, and the light sources  13   b  that emit light of the second wavelength. By sequentially measuring light from given light sources  13  that are next to each other, a rotation amount of the jig LW that rotates through the alignment device ORT 1  can be reduced. 
     The CPU  104   a  combines data indicating emission intensity from light of the first to fourth wavelengths, and stores, as reference data, combination data of the data indicating the emission intensity, in the memory  105   a.    
     Hereafter, a processing system  1   b  used when measurement data indicting emission intensity is compared with the reference data to thereby be corrected will be described with reference to  FIG. 5 .  FIG. 5  is a diagram illustrating an example of a hardware configuration of the processing system  1   b  including a semiconductor manufacturing apparatus  30   b  according to the embodiment. The processing system  1   b  includes the semiconductor manufacturing apparatus  30   b  and the jig LW. The semiconductor manufacturing apparatus  30   b  includes the chamber  2   b , the optical emission spectrometer  100   b , the MC  181 , transfer devices VA 2  and LA 2 , and an alignment apparatus ORT 2 . 
     The optical emission spectrometer  100   b  includes a measuring unit  103   b , a CPU  104   b , and a memory  105   b . The measuring unit  103   b  measures data indicating emission intensity from light that is emitted from the light sources  13  provided in the jig LW. The memory  105   b  stores a given program for analyzing data indicating emission intensity from light that is emitted from the light sources  13  in the jig LW. The CPU  104   b  executes the program stored in the memory  105   b  to measure light that is emitted from the light sources  13  in the jig LW that is transferred to the chamber  2   b  in a correction plasma processing apparatus  10 . The CPU  104   b  also analyzes data indicating emission intensity. The CPU  104   b  compares measurement data indicating measured emission intensity with the reference data stored in the memory  105   a . The CPU  104   b  corrects the measurement data based on a compared result. 
     The MC  181  performs a control to cause the jig LW to be transferred between the chamber  2   b  of the reference plasma processing apparatus  10  and the vacuum transfer module VTM, while maintaining a reduced pressure environment of the chamber  2   b  (process chamber). The MC  181  also causes the jig LW to be transferred to the alignment device ORT 2  and causes the notch  22  to be rotated in a direction specified as a reference. Further, the MC  181  causes a rotated jig LW to be mounted on the stage ST. The jig LW turns on the light sources  13   a  at locations approaching the window  101   b  of the chamber  2   b . The measuring unit  103   b  receives light of a first wavelength that is emitted from the light sources  13   a , through the window  101   b . The CPU  104   b  analyzes emission intensity of the received light of the first wavelength. 
     Then, the MC  181  again causes the jig LW to be transferred to the alignment device ORT 2  and causes the notch  22  to be rotated in the direction specified as a reference. The MC  181  causes a rotated jig LW to be mounted on the stage ST. The jig LW turns on the light sources  13   b  at locations approaching the window  101   b  of the chamber  2   b . The measuring unit  103   b  receives light of a second wavelength that is emitted from the light sources  13   b , through the window  101   b . The CPU  104   b  analyzes emission intensity of the received light of the second wavelength. 
     Then, the MC  181  again causes the jig LW to be transferred to the alignment device ORT 2  and causes the notch  22  to be rotated in the direction specified as a reference. The MC  181  causes a rotated jig LW to be mounted on the stage ST. The jig LW turns on the light sources  13   c  at locations approaching the window  101   b  of the chamber  2   b . The measuring unit  103   a  receives light of a third wavelength that is emitted from the light sources  13   b , through the window  101   b . The CPU  104   b  analyzes emission intensity of the received light of the third wavelength. 
     Then, the MC  181  again causes the jig LW to be transferred to the alignment device ORT 2  and causes the notch  22  to be rotated in the direction specified as a reference. The PC  400  causes a rotated jig LW to be mounted on the stage ST. The jig LW turns on the light sources  13   d  at locations approaching the window  101   b  of the chamber  2   b . The measuring unit  103   b  receives light of a fourth wavelength that is emitted from the light sources  13   c , through the window  101   b . The CPU  104   b  analyzes emission intensity of the received light of the fourth wavelength. 
     The CPU  104   b  combines data indicating emission intensity from light of the first to fourth wavelengths. The CPU  104   b  also compares combination data of the data indicating the emission intensity, as measurement data, with the reference data stored in the memory  105   a.    
     The CPU  104   b  corrects the measurement data indicating combined emission intensities, based on a compared result. In other words, the CPU  104   b  calculates a difference between the measurement data indicating the combined emission intensities and the reference data, and corrects the measurement data indicating the combined emission intensities so that the measurement data indicates the same waveform as the reference data. 
     A server acquires, from the optical emission spectrometer  100   b , data (hereinafter referred to as “correction data”) indicating corrected emission intensity, and then stores the correction data. In such a manner, a state of a given plasma processing apparatus  10 , and differences according to each plasma processing apparatus  10  can be analyzed based on log data of accumulated correction data. The server may be a host computer that is connected to a plurality of MCs  181  for controlling respective semiconductor manufacturing apparatuses  30  and that collects correction data from each of the MCs  181 . 
     Operation of Processing System 
     Hereafter, an example of the operation of the processing system  1   a  used when the reference data according to the embodiment is obtained will be described with reference to  FIG. 6 .  FIG. 6  is a diagram illustrating an example of the operation of the processing system  1   a  according to the embodiment. A left-side line in  FIG. 6  relates to a process of the jig LW. A middle-portion line in  FIG. 6  relates to a process of the PC  400 . A right-side line in  FIG. 6  relates to a process of the optical emission spectrometer  100   a.    
     When the process is initiated, the PC  400  causes the jig LW to be transferred to the alignment device ORT 1  using the transfer devices VA 1  and LA 1  (steps S 31  and S 41 ). Then, the PC  400  causes the jig LW to rotate in a specified direction of rotation in the alignment device ORT 1  (steps S 32  and S 42 ). Then, the PC  400  causes the jig LW to be transferred to the chamber  2   a  of the reference plasma processing apparatus  10 , using the transfer devices VA 1  and LA 1  (steps S 33  and S 43 ). 
     Then, the PC  400  causes the jig LW to be mounted on the stage ST in the chamber  2   a , through a pick operation of the transfer device VA 1  (step S 44 ). At this time, the PC  400  transmits a measurement-start signal to the optical emission spectrometer  100   a  (step S 45 ). The optical emission spectrometer  100   a  receives the measurement-start signal (step S 51 ). 
     At the timing at which the process in step S 44  is performed, the jig LW detects that it is to be mounted (step S 34 ). The jig LW detects that it is to be mounted on the stage ST, through a given temperature sensor  14  or the acceleration sensor  17 . The acceleration sensor  17  detects the inclination of the jig LW and a lifting operation of the jig LW. The temperature sensor  14  detects the temperature of the stage ST. The jig LW detects at least one from among the inclination, lifting operation, and temperature of the jig LW, to determine whether to be mounted on the stage ST. At a timing at which the jig detects that is to be mounted, the jig LW turns on the LED light sources  13   a  (step S 35 ). The optical emission spectrometer  100   a  receives LED light (step S 52 ). 
     After a predetermined period of time has elapsed since the light sources  13   a  are turned on (step S 36 ), the jig LW turns off the LED light sources  13   a  (step S 37 ). After a predetermined period of time has elapsed since the light sources  13   a  are turned on (step S 53 ), the optical emission spectrometer  100   a  stops receiving the LED light (step S 54 ). For a result of optical emission spectroscopy in a target wavelength range (which is the first wavelength, for example), the optical emission spectrometer  100   a  stores data indicating emission intensity, in the memory  105   a  (step S 56 ). In such a manner, the data indicating the emission intensity at the first wavelength is stored in the memory  105   a.    
     In step S 54 , the optical emission spectrometer  100   a  stops receiving the LED light, and then transmits a measurement-stop signal to the PC  400  (step S 55 ). When the PC  400  receives the measurement-stop signal (step S 46 ), the PC  400  causes the jig LW to be removed from the chamber  2   a , through the pick operation of the transfer device VA 1  (step S 47 ). Thus, the jig LW is removed from the chamber  2   a  (step S 38 ). 
     The PC  400  repeats the process in steps S 41  to S 47 , the jig LW repeats the process in steps S 31  to S 38 , and the optical emission spectrometer  100   a  repeats the process in steps S 51  to S 56 . In such a manner, the optical emission spectrometer  100   a  measures light sequentially emitted from the light sources  13   b , the light sources  13   c , and the light sources  13   d , and performs spectroscopic analysis in sequence. For a result of optical emission spectroscopy in a target wavelength range (which is the second wavelength, third wavelength, or fourth wavelength, for example), the optical emission spectrometer  100   a  stores each data indicating emission intensity at a given target wavelength, in the memory  105   a  (step S 56 ). In such a manner, in addition to the data indicating the emission intensity at the first wavelength, respective pieces of data indicating the emission intensity at the second wavelength, the third wavelength, and the fourth wavelength are stored in the memory  105   a.    
     The PC  400  repeats the process in steps S 41  to S 47  a predetermined number of times (in this example, 4 times), and then terminates the process. 
     The jig LW repeats the process in steps S 31  to S 38  a predetermined number of times (in this example, 4 times), and then terminates the process. The optical emission spectrometer  100   a  repeats the process in steps S 51  to S 56  a predetermined number of times (in this example, 4 times). Then, the optical emission spectrometer  100   a  combines the stored data indicating emission intensity (step S 57 ). 
     Then, the optical emission spectrometer  100   a  stores, as reference data, combination data of measurement data indicating emission intensity, in the memory  105   a  (step S 58 ). The process is terminated. 
       FIG. 7  is a diagram illustrating an example of the reference data according to the embodiment.  FIG. 7  illustrates data indicating emission intensity with four peaks at respective different wavelengths, where the data is used as an example of reference data A indicating emission intensity according to the embodiment. 
     Note that the predetermined period of time in step S 36  corresponds to the predetermined period of time in step S 53 . Instead of the process in step S 36  and step S 53 , the following process may be performed. The PC  400  determines whether the jig LW moves away from the stage ST through a pick operation of the transfer device VA 1 . If it is determined that the jig LW moves away from the stage ST, the PC  400  transmits a measurement-stop signal to the jig LW and the optical emission spectrometer  100   a . In response to receiving the measurement-stop signal, the jig LW turns off the LED light sources  13   a . The optical emission spectrometer  100   a  stops receiving LED light in response to receiving the measurement-stop signal. The jig LW may detect to move away from the stage ST, through a given temperature sensor  14  or the acceleration sensor  17 . 
     In the embodiment, the jig LW, the PC  400 , and the optical emission spectrometer  100   a  may perform wireless communication to perform the process in the steps illustrated in  FIG. 6 . 
     Operation of Optical Emission Spectrometer 
     Hereafter, an example of the operation of the optical emission spectrometer  100   a  according to the embodiment will be described with reference to  FIG. 8 .  FIG. 8  is a diagram illustrating an example of the operation of the optical emission spectrometer  100   a  according to the embodiment. 
     When the process is initiated, the optical emission spectrometer  100   a  receives the measurement-start signal (see step S 45  in  FIG. 6 ) transmitted by the PC  400  (step S 21 ). Then, the optical emission spectrometer  100   a  turns on a timer (step S 22 ). Then, the optical emission spectrometer  100   a  determines whether light emission is detected through the window  101   a  of the chamber  2   a  (step S 23 ). If it is determined that light emission is not detected, the optical emission spectrometer  100   a  determines whether a set time has elapsed based on a time period measured by the timer (step S 24 ). If it is determined that a set time does not elapse, the optical emission spectrometer  100   a  returns to step  23  to determine whether light emission is detected. If light emission is detected before the set time elapses, the optical emission spectrometer  100   a  analyzes light emission in a target wavelength range (step S 25 ) and then terminates the process. In contrast, if a set time elapses without detecting light emission, the optical emission spectrometer  100   a  outputs an error signal (step S 26 ) and then terminates the process. Note that data indicating emission intensity that is obtained in an analyzed result is stored in the memory  105   a , as reference data (see step S 56  in  FIG. 6 ). 
     Operation of Processing System 
     Hereafter, an example of the operation of the processing system  1   b  used when the reference data according to the embodiment is compared with the measurement data and the measurement data is corrected will be described with reference to  FIG. 9 .  FIG. 9  is a diagram illustrating an example of the operation of the processing system  1   b  according to the embodiment. A left-side line in  FIG. 9  relates to the process of the jig LW. A middle-portion line in  FIG. 9  relates to the process of the MC  181 . A right-side line in  FIG. 9  relates to the process of the optical emission spectrometer  100   b.    
     The operation of the jig LW in  FIG. 9  is the same as the operation of the jig LW in  FIG. 6 , and the same processes denote the same step numerals. The operation of the MC  181  in  FIG. 9  is the same as the operation of the PC  400  in  FIG. 6 , and the same processes denote the same step numerals. The operation of the optical emission spectrometer  100   b  in  FIG. 9  is approximately the same as the operation of the optical emission spectrometer  100   a  in  FIG. 6 , and the same processes denote the same step numerals. For differences between the processing system  1   b  in  FIG. 9  and the processing system  1   a  in  FIG. 6 , first, in the processing system  1   b  in  FIG. 9 , the optical emission spectrometer  100   b  performs the process in step S 59 , while in the processing system la in  FIG. 6 , the optical emission spectrometer  100   a  performs the process in step S 58 . Further, in step S 44  in  FIG. 9 , a given chamber  2  to which the jig LW is transferred is the chamber  2   b  of the correction plasma processing apparatus  10 , while in step S 33  in  FIG. 6 , a given chamber  2  to which the jig LW is transferred is the chamber  2   a  of the reference plasma processing apparatus  10 . The description for the same process as the processing system  1   a  in  FIG. 6 , other than the above differences, will be omitted as a whole. 
     When the process is initiated, the MC  181  repeats the process in steps S 41  to S 47 , the jig LW repeats the process in steps S 31  to S 38 , and the optical emission spectrometer  100   b  repeats the process in steps S 51  to S 56 . In such a manner, the optical emission spectrometer  100   b  measures light sequentially emitted from the light sources  13   b , the light sources  13   c , and the light sources  13   d , and performs spectroscopic analysis in sequence. For a result of optical emission spectroscopy in a target wavelength range (which is the second wavelength, third wavelength, or fourth wavelength, for example), the optical emission spectrometer  100   b  stores each data indicating emission intensity at a given target wavelength, in the memory  105   b . In such a manner, measurement data, indicating emission intensities at the first to fourth wavelengths in the chamber  2   b  of the correction plasma processing apparatus  10 , are stored in the memory  105   b.    
     The MC  181  repeats the process in steps S 41  to S 47  a predetermined number of times (in this example, 4 times), and then terminates the process. The jig LW repeats the process in steps S 31  to S 38  a predetermined number of times (in this example, 4 times), and then terminates the process. The optical emission spectrometer  100   b  repeats the process in steps S 51  to S 56  a predetermined number of times (in this example, 4 times). Then, the optical emission spectrometer  100   b  combines the stored data indicating emission intensity (step S 57 ). 
     Then, the optical emission spectrometer  100   b  compares combination data of the data indicating emission intensity at the first to fourth wavelengths, as measurement data, with the reference data, and corrects the measurement data so as to match the reference data (step S 59 ). The process is then terminated. A dotted line in  FIG. 7  represents an example of measurement data B according to the embodiment. The optical emission spectrometer  100   b  calculates a difference between the reference data A and the measurement data B, and corrects the measurement data B so that the measurement data B has the same waveform as the reference data A. In such a manner, by correcting of peak positions and emission intensities for the measurement data B, the measurement data B can be corrected to have the same waveform as the reference data A. 
     Note that in the embodiment, the jig LW, the MC  181 , and the optical emission spectrometer  100   b  may perform wireless communication to perform the process in the steps illustrated in  FIG. 9 . 
     Operation of Optical Emission Spectrometer 
     The operation of the optical emission spectrometer  100   a  in  FIG. 8  is performed in conjunction with the operation of the PC  400  in  FIG. 6 . Likewise, the operation of the optical emission spectrometer  100   b  is performed in conjunction with the operation of the MC  181  in  FIG. 9 . Note that the operation of the optical emission spectrometer  100   b  is the same as that of the optical emission spectrometer  100   a  illustrated in  FIG. 8 , and the description for the operation of the optical emission spectrometer  100   b  will be omitted. 
     The LED light sources  13  have individual differences. For this reason, preferably, the reference data is preliminarily measured and stored in the memory  105   a . The reference data may be generated using an information processing apparatus on a jig manufacturer side such as a jig manufacturing factory. However, such a manner is not limiting. The reference data may be generated using an information processing apparatus on a manufacturer side of the semiconductor manufacturing apparatus  30   a , or may be generated using an information processing apparatus on a user side such as a factory to which the semiconductor manufacturing apparatus  30   a  is shipped. Further, reference data may be generated individually for each jig LW, or alternatively, reference data in common with multiple jigs LW may be generated. 
     As described above, in a given processing system  1  according to one or more embodiments and modifications, a given optical emission spectrometer  100  calculates the difference between the measurement data indicating combined emission intensities and the reference data, and corrects one or more peaks and emission intensities of the measurement data, so that the measurement data has the same waveform as the reference data. In such a manner, monitoring and controlling of the process, such as EPD, can be performed in consideration of differences according to each plasma processing apparatus  10 . 
     In other words, by correcting the measurement data indicating the emission intensities so that the measurement data has the same waveform as the reference data, when light of the same wavelength is received, even in a case where LED light is thereby received from a given chamber  2  at any timing, measurement data indicating the same emission intensity is obtained. In such a manner, monitoring and controlling of the process, such as EPD, can be performed in consideration of differences according to each plasma processing apparatus  10 . 
     Further, in such a manner, differences according to each plasma processing apparatus  10  can be detected based on the measurement data indicating emission intensity. In other words, the differences according to each plasma processing apparatus  10  can be identified from the difference between the measurement data indicating emission intensity, and the reference data, and operation of the process monitor or the like can be performed in consideration of the identified differences according to each plasma processing apparatus  10 . 
     The correction of the measurement data described above may be performed at a time of shipment, or may be performed at a timing at which a given window  101  becomes cloudy due to a reaction product or the like that adheres to the window  101  in accordance with a substrate process. Alternatively, such correction of the measurement data may be performed at regular intervals, or may be performed for each measurement data. 
     The operation of each component described above is not limiting. For example, for the operation of the MC  181 , the ECC  180  may be performed instead of the MC  181 , or be performed in cooperation with the MC  181 . 
     A combination of the PC  400  and the optical emission spectrometer  100   a  is used as an example of a first information processing apparatus that performs a control to cause the jig LW to be disposed in a reference device and to measure, as reference data, data indicating emission intensity from light emitted from light sources  13 . A combination of the MC  181  and the optical emission spectrometer  100   b  is used as an example of a second information processing apparatus that performs a control to cause the jig LW to be disposed in a correction device and to measure data indicating emission intensity from light emitted from light sources  13 . The second information processing apparatus performs a control to acquire the reference data, compare data indicating measured emission intensity with the reference data, and correct the data (measurement data) indicating measured emission intensity, based on a compared result. 
     The first information processing apparatus may be the same information processing apparatus as the second information processing apparatus, or be a different information processing apparatus from the second information processing apparatus. For example, a combination of the MC  181  and the optical emission spectrometer  100   b  may have functions provided by both of the first information processing apparatus and the second information processing apparatus. A combination of the EC  180  and the optical emission spectrometer  100   b  may have functions provided by both of the first information processing apparatus and the second information processing apparatus. The functions provided by both of the first information processing apparatus and the second information processing apparatus may be implemented by a combination of the EC  180 , the MC  181 , and the optical emission spectrometer  100   b  that are in cooperation. 
     An instruction to transfer the jig LW to a given chamber may be sent at a timing at which a signal indicating that the substrate process is completed is received from the EC  180  that controls a given plasma processing apparatus  10 . 
     The temperature sensors  14   a  to  14   d  that are provided in the jig LW are disposed next to the light sources  13   a  to  13   d , respectively. When given light sources from among the light source  13   a  to  13   d  emit light, temperature of a corresponding temperature sensor from among the temperature sensors  14   a  to  14   d  increases. When a measured temperature is greater than or equal to a predetermined threshold, at least one light source from among light sources is determined to fail, and then emissions from the light sources may be interrupted. 
     Analysis by the optical emission spectrometers  100  ( 100   a  and  100   b ) is not limited to EPD, and may be used for device diagnosis. As an example of the device diagnosis, for example, it may be determined whether a plasma condition is normal based on a difference between measurement data indicating emission intensity and reference data, or on measurement data indicating emission intensity after correction. For example, such device diagnosis may be performed after maintenance of a given plasma processing apparatus  10 , or after replacement of one or more component parts in a given plasma processing apparatus  10 . 
       FIG. 10  is a diagram for describing an example of device diagnosis using a given processing system  1  according to the embodiment and modification. Given light sources  13  are turned on using the jig LW mounted in the plasma processing apparatus  10  in which a plasma is formed from a helium gas. Then, the optical emission spectrometer  100  performs spectroscopic analysis of the plasma from the helium gas to obtain emission intensity data illustrated in  FIG. 10( a ) .  FIG. 10( b )  is an enlarged view of emission intensity distribution in a wavelength range of from 250 nm to 330 nm. In  FIG. 10( b ) , a solid line represents reference data, and a dashed line represents measurement data after correction. In this case, for each of the reference data and the measured data, a peak for He (helium) appears at the wavelength of 295 nm. In contrast, for the measured data, a minor peak for OH radicals appears at the wavelength of 309 nm, compared with the reference data. From the result, the processing system  1  can determine that the minor peak for the OH radicals is caused by an uncertain factor of the chamber  2   a . As described above, from the difference between the reference data and the measurement data, a minor peak that does not appear in a case of a theoretical light source that emits light approximating a plasma can be found, so that analysis can be performed. In such a manner, there is one or more important peaks used to analyze differences according to each plasma processing apparatus  10 . Further, such differences according to each plasma processing apparatus  10  can be analyzed based on correction data indicating emission intensity. Thus, a given peak point is extracted and the measurement data can be corrected at the peak point. 
     As described above, the jig LW according to the embodiment can increase analytic accuracy of emission intensity. Further, by correcting the measurement data indicating emission intensity to thereby have the same waveform as the reference data, monitoring and controlling of the process, such as EPD can be performed in consideration of differences according to each plasma processing apparatus  10 . Further, the differences according to each plasma processing apparatus  10  can be determined based on the measurement data indicating the emission intensity, and thus operation of the process monitor or the like can be performed taking into account the determined differences according to each plasma processing apparatus  10 . 
     Other Examples of Jig LW 
     Other examples of the jig LW according to one embodiment will be described with reference to  FIG. 11 .  FIG. 11  is a cross-sectional diagram illustrating another example of the jig LW according to the embodiment. The jig LW in  FIG. 11  differs from the jig LW illustrated in  FIG. 1 , in the number and arrangement of light sources  13 . Other configurations of the jig LW in  FIG. 11  are the same as those of the jig LW illustrated in  FIG. 1 . The description for the same configurations will not be provided. 
     As illustrated in  FIG. 11 , light sources  13   a  to  13   l  are disposed in the control board  12  on the base  11 . The light sources  13   a  to  13   l  emit light of respective different wavelengths (i.e., different colors). The light sources  13   a  are three LEDs each of which emits light of the same wavelength, and are arranged side by side. Likewise, the light sources  13   b  are three LEDs each of which emits light of the same wavelength and are arranged side by side. The light sources  13   c  are three LEDs each of which emits light of the same wavelength and are arranged side by side. Each of the light sources  13   a  to  13   l  may be an OLED instead of the LED. 
     With respect to the light sources  13   a  to  13   l  for respective wavelengths, three light sources each of which emits light of the same wavelength are arranged side by side, for each wavelength. In such a manner, an amount of light of each wavelength can be increased and thus the optical emission spectrometer  100  attached to a given window of a correction apparatus or a reference apparatus easily receives light of each wavelength through the window. The light sources  13   a , the light sources  13   b , and the light sources  13   c  are spaced apart. Following these light sources  13   a ,  13   b , and  13   c , the light sources  13   d , the light sources  13   e , and the light sources  13   f  are spaced apart in this order, relative to a given battery. Following these light sources  13   d ,  13   e , and  13   f , the light sources  13   g , the light sources  13   h , and the light sources  13   i  are spaced apart in this order, relative to a given battery. Following these light sources  13   g ,  13   h , and  13   i , the light sources  13   j , the light sources  13   k , and the light sources  13   l  are spaced apart in this order, relative to a given battery. In such a configuration, three light sources emit light of the same wavelength, and in total,  36  (=12×3) light sources  13  that emit light of  12  different wavelengths are arranged. 
     The light sources  13   a  to  13   l  are preferably positioned along the outermost perimeter of the base  11 . In such a manner, a given optical emission spectrometer  100  more easily receives light emitted from the light sources  13   a  to  13   l . However, arrangement of the light sources  13   a  to  13   l  described above is not particularly restricted when such light sources are in the control board  12 . 
     For the three light sources  13   a  of the same wavelength, it is preferable that measurement is performed in order of a middle-portion light source, one end-side light source from among the remaining two light sources, and another end-side light source. However, the one end-side light source, the another end-side light source, and the middle-portion light source are turned on in this order and measurement may be performed in sequence. Alternatively, the one end-side light source, the middle-portion light source, and the another end-side light source are turned on in this order and measurement may be performed in sequence. The same measurement order applies to three light sources of the same wavelength, from among the light sources  13   b  to  13   l.    
     The jig, the processing system, and the processing method according to the embodiments in the present disclosure are examples and are not intended to be limiting in all respects. While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the disclosures. Indeed, the embodiments described herein may be embodied in a variety of other forms. Furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the disclosures. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the disclosures. 
     The plasma processing apparatus in the present disclosure is applicable to an atomic layer deposition (ALD) apparatus. The plasma processing apparatus is also applicable to an apparatus using any one selected from among a capacitively coupled plasma (CCP), an inducibly coupled plasma (ICP), a radial line slot antenna (RLSA), an electron cyclotron resonance plasma (ECRP), and a helicon wave plasma (HWP). 
     According to one aspect of the present disclosure, analytic accuracy of emission intensity can be increased.