WO2017034057A1 - 기판처리장치와 기판처리방법 - Google Patents
기판처리장치와 기판처리방법 Download PDFInfo
- Publication number
- WO2017034057A1 WO2017034057A1 PCT/KR2015/009001 KR2015009001W WO2017034057A1 WO 2017034057 A1 WO2017034057 A1 WO 2017034057A1 KR 2015009001 W KR2015009001 W KR 2015009001W WO 2017034057 A1 WO2017034057 A1 WO 2017034057A1
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- WO
- WIPO (PCT)
- Prior art keywords
- substrate
- chemical liquid
- temperature
- radiant energy
- interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H10P72/0414—
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0003—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiant heat transfer of samples, e.g. emittance meter
- G01J5/0007—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiant heat transfer of samples, e.g. emittance meter of wafers or semiconductor substrates, e.g. using Rapid Thermal Processing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/025—Interfacing a pyrometer to an external device or network; User interface
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/04—Casings
- G01J5/048—Protective parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/07—Arrangements for adjusting the solid angle of collected radiation, e.g. adjusting or orienting field of view, tracking position or encoding angular position
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0846—Optical arrangements having multiple detectors for performing different types of detection, e.g. using radiometry and reflectometry channels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0875—Windows; Arrangements for fastening thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/52—Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer
- G01J5/53—Reference sources, e.g. standard lamps; Black bodies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/60—Radiation pyrometry, e.g. infrared or optical thermometry using determination of colour temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/80—Calibration
- G01J5/802—Calibration by correcting for emissivity
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- H10P50/00—
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- H10P72/0418—
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- H10P72/0424—
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- H10P72/0431—
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- H10P72/0436—
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- H10P72/0448—
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- H10P72/0602—
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- H10P74/203—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
Definitions
- the present invention relates to a substrate processing apparatus and a substrate processing method, and more particularly, a substrate processing apparatus capable of optimizing the processing temperature of a substrate according to a chemical liquid by directly measuring the calculated temperature of the chemical liquid or an interface at which the chemical liquid and the substrate are in contact. And a substrate processing method.
- the wet process corresponds to a process of etching or cleaning the surface of the substrate by contacting a liquid chemical to a substrate such as a silicon wafer.
- the wet process may include an etching process of forming a thin film or a layer on the substrate by contacting the chemical liquid with the substrate.
- the wet process may include a cleaning process of contacting the chemical liquid with the substrate to wash a thin film formed on the substrate or a layer formed on the substrate, or to remove contamination formed on the substrate.
- the present invention has been made in order to improve the above problems, the substrate temperature of the chemical liquid contacted to the substrate in the substrate processing process, such as wet etching or cleaning the surface of the substrate using the chemical liquid or the substrate and the chemical liquid It is an object of the present invention to provide a substrate processing apparatus and a substrate processing method capable of optimizing the processing temperature of a substrate according to a chemical liquid by directly measuring the calculated temperature of the interface in contact.
- a substrate treating apparatus includes: an emissivity setting unit for inputting an emissivity at a chemical liquid contacting a substrate or an interface between the substrate and the chemical liquid; A radiant energy input unit to which radiant energy radiated from the chemical liquid or the interface is input; And a calculating unit calculating a calculation temperature of the chemical liquid or the interface based on the emissivity and the radiant energy.
- the substrate processing apparatus further includes a chamber including a table disposed to be rotatable, a support for supporting the substrate apart from the table, and a nozzle for supplying the chemical liquid to the substrate. do.
- the nozzle is characterized in that spaced apart from the lower side of the substrate.
- the calculating unit is characterized in that for calculating the calculated temperature using the absolute temperature calculated according to Equation 3 below.
- E ( ⁇ , T) is the radiant energy input to the radiant energy input unit
- ⁇ is an infrared wavelength preset according to the radiant energy input unit
- ⁇ is the emissivity at the chemical liquid or the interface
- T the absolute temperature
- k is the Boltzmann constant.
- the radiation thermometer to measure the calculated temperature including the radiant energy input unit, the emissivity setting unit and the calculation unit, the radiation thermometer is installed on the installation spaced apart from the upper side of the substrate It is characterized by.
- the substrate processing apparatus further comprises a protection unit surrounding and protecting the radiant energy input unit.
- the radiant energy input unit characterized in that spaced apart from the substrate on the opposite side where the interface is located with respect to the substrate.
- the substrate processing apparatus may further include a control unit for comparing a predetermined process temperature with the calculated temperature for etching or cleaning the substrate.
- the substrate treating apparatus further includes a heater disposed to be spaced apart from the upper side of the substrate to heat the chemical liquid in contact with the substrate or the substrate in response to a signal from the controller.
- the substrate is divided into a center region corresponding to the rotation center portion of the table, an edge region corresponding to an edge portion according to the rotation of the table, and a variation region partitioning between the center region and the edge region.
- the radiant energy input unit and the heater are disposed in the center region, the edge region, and the variation region, respectively, and the controller is configured to operate the heater separately in the center region, the edge region, and the variation region. It is characterized by.
- Substrate processing method the measuring step of measuring the radiant energy radiated at the interface between the chemical liquid in contact with the substrate or the substrate and the chemical liquid; And calculating a calculation temperature of the chemical liquid or the interface in contact with the substrate based on the radiant energy measured through the measuring step and the emissivity at the chemical liquid or the interface.
- the calculating step is characterized by calculating the calculated temperature using the absolute temperature (T) calculated according to Equation 4 below.
- E ( ⁇ , T) is the radiant energy measured through the measuring step
- ⁇ is an infrared wavelength preset according to the radiant energy input unit to which the radiant energy is input
- ⁇ is the emissivity at the chemical liquid or the interface
- T the absolute temperature
- k is the Boltzmann constant.
- the substrate processing method according to the present invention further includes a comparison step of comparing the calculated process temperature calculated through the calculating step with a predetermined process temperature for etching or cleaning the substrate.
- the measuring step when the calculated temperature is included in a predetermined process temperature while going through the comparison step, the measuring step is performed.
- the substrate treating method when the calculated temperature is not included in a predetermined process temperature while the comparison step is performed, the substrate treating method contacts the substrate or the substrate according to a difference between the calculated temperature and the predetermined process temperature. And a correction step of heating the chemical liquid.
- Substrate treatment apparatus and substrate processing method according to the present invention by directly measuring the output temperature of the chemical liquid in contact with the substrate or the temperature of the interface between the substrate and the chemical liquid in the wet wet etching or cleaning process, processing the substrate according to the chemical liquid
- the temperature can be optimized.
- the present invention by directly measuring the temperature of the chemical liquid or interface in contact with the substrate, by accurately and efficiently managing the processing temperature of the substrate to process the substrate due to overheating of the substrate (overheating of the substrate by heating the substrate or the chemical liquid) Unbalance and the like can be eliminated.
- the present invention can precisely and efficiently manage the processing temperature of the substrate by precisely controlling the change in the processing temperature of the substrate, which takes up a large proportion in the single wafer wet etching process.
- the present invention may realize high process reproducibility and precision in wet process equipment, in particular, wet wet etching or cleaning process equipment, as the degree of integration of patterns increases.
- the present invention is able to grasp the change in the temperature distribution in the substrate in real time to immediately recognize the occurrence of defects in the etching process or the cleaning process, can be used as a basis for identifying the cause of the yield decrease, and furthermore the process defects You can predict it.
- the present invention can sufficiently compensate for the cooling of the chemical liquid generated when the chemical liquid in the heated state is supplied to the substrate, to ensure the correct process conditions in the wet type wet etching or cleaning process, single wet type etching Alternatively, standardization of the cleaning process can be realized.
- the present invention can be applied to a large-area substrate to keep the processing temperature of the entire substrate substantially uniform.
- the present invention can suppress or prevent scattering and interference of light with respect to the chemical liquid by measuring the calculated temperature at the opposite surface of the interface between the substrate and the chemical liquid.
- the present invention can suppress or prevent the concentration of the chemical liquid from evaporating or changing in the process of contacting the chemical liquid on the substrate by heating the substrate or the chemical liquid on the opposite side of the interface where the chemical liquid is in contact.
- the present invention can prevent or suppress the concentration of the chemical liquid or the composition change of the chemical liquid by heating the substrate or the chemical liquid after supplying the chemical liquid at room temperature to the substrate.
- FIG. 1 is a view showing a substrate processing apparatus according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating a substrate in a single wafer wet etching or cleaning process according to an embodiment of the present invention.
- FIG. 3 is a first configuration diagram illustrating a substrate processing apparatus according to an embodiment of the present invention.
- FIG. 4 is a second configuration diagram illustrating a substrate processing apparatus according to an embodiment of the present invention.
- FIG. 5 is a graph illustrating an infrared wavelength range in which radiant energy is measured according to a temperature change in a substrate processing apparatus according to an embodiment of the present invention.
- FIG. 6 is a view showing a substrate processing apparatus according to another embodiment of the present invention.
- FIG. 7 is a flowchart illustrating a substrate processing method according to an embodiment of the present invention.
- FIG. 8 is a structural diagram showing an experimental apparatus for detecting the characteristics of the radiation thermometer for the chemical liquid in the substrate processing method according to an embodiment of the present invention.
- FIG. 9 is a structural diagram showing an experimental device for detecting the characteristics of the radiation thermometer for the substrate immersed in the chemical liquid in the substrate processing method according to an embodiment of the present invention.
- FIG. 10 is a structural diagram showing an experimental apparatus for detecting the characteristics of the radiation thermometer at the interface between the substrate and the chemical liquid in the substrate processing method according to an embodiment of the present invention.
- FIG. 11 is a structural diagram showing an experimental apparatus for checking the characteristics of the radiation thermometer in the substrate processing method according to an embodiment of the present invention.
- FIG. 1 is a view showing a substrate processing apparatus according to an embodiment of the present invention
- Figure 2 is a view showing a substrate in a wet type wet etching or cleaning process according to an embodiment of the present invention
- Figure 3 1 is a first configuration diagram illustrating a substrate processing apparatus according to an embodiment of the present invention
- FIG. 4 is a second configuration diagram illustrating a substrate processing apparatus according to an embodiment of the present invention
- FIG. 5 is an embodiment of the present invention.
- a substrate processing apparatus includes an emissivity setting unit 11, a radiant energy input unit 15, a calculation unit 17, and a chamber 50.
- the processing temperature of the substrate W according to the chemical liquid C can be optimized.
- the sheet of substrate (W) is seated on the support 54, and rotates the substrate (W) through the diffusion (57).
- the chemical liquid C moved from the at least one chemical liquid tank 59 via the chemical liquid line 58 is supplied to the surface of the substrate W at the nozzle 55 corresponding to the chemical liquid tank 59 in a predetermined order. .
- the process result may vary depending on the contact time of the chemical liquid (C), the amount of the chemical liquid (C), and the temperature of the chemical liquid (C).
- the chemical liquid C is heated in the chemical liquid tank 59, and the heated chemical liquid C is supplied to the substrate W.
- the chemical liquid (C) uses a mixed liquid, heat of chemical reaction may be used.
- Substrate processing apparatus is a substrate (W) that is rotated in a wet type wet etching or cleaning process of etching or cleaning a single substrate (W) using the chemical liquid (C) supplied from the nozzle 55
- the chemical liquid C supplied from the nozzle 55
- the calculated temperature of the chemical liquid C in contact with the substrate W or the interface between the substrate W and the chemical liquid C can be measured.
- the emissivity setting unit 11 inputs the emissivity at the interface between the chemical liquid C or the substrate W and the chemical liquid C.
- emissivity is preset according to the kind of chemical liquid (C).
- the emissivity at the interface between the chemical liquid C supplied to the substrate W and in contact with the substrate W or the substrate W and the chemical liquid C is measured separately, and the measured emissivity is the emissivity setting unit. It can be entered in (11).
- the emissivity may be a complex emissivity through which energy radiated at the interface between the substrate W and the chemical liquid C passes through the substrate W.
- the radiant energy input unit 15 is provided in the installation unit B spaced apart from the upper side of the substrate (W).
- the radiant energy input unit 15 receives radiant energy radiated at the interface between the chemical liquid C contacting the substrate W or the substrate W and the chemical liquid C.
- the radiant energy input unit 15 may radiate the radiant energy passing through the substrate W while radiating from the chemical solution C or the interface while the chemical liquid C is in contact with the substrate W.
- the calculation unit 17 calculates the calculation temperature of the chemical liquid C or the interface in contact with the substrate W based on the emissivity input to the emissivity setting unit 11 and the radiation energy input to the radiant energy input unit 15. do.
- the calculator 17 may calculate the calculated temperature using the absolute temperature T calculated according to Equation 1 below.
- E ( ⁇ , T) is the radiant energy input to the radiant energy input unit 15
- ⁇ is a preset infrared wavelength
- ⁇ is the emissivity of the chemical liquid (C)
- T the absolute temperature
- k is the Boltzmann constant.
- the calculated temperature can be accurately measured by converting the calculated absolute temperature T into degrees Celsius or degrees Fahrenheit.
- the preset infrared wavelength is a constant preset according to the radiant energy input unit 15.
- Radiation energy emitted by an object follows Plank's law. At lower temperatures, the peak wavelength is shifted to longer wavelengths.
- the wavelength at which the radiant energy of 1 W / (m 2) (sr) ( ⁇ m) or more can be measured is in the range of more than 4 ⁇ m and 30 ⁇ m or less, and the peak wavelength is 10 ⁇ m. to be.
- the wavelength is preset to an infrared wavelength of more than 4 ⁇ m and 30 ⁇ m or less.
- the infrared wavelength may be preset to 5 ⁇ m or more and less than 25 ⁇ m.
- the radiant energy input unit 15 may input radiant energy of 2 W / (m 2) (sr) ( ⁇ m) or more.
- an infrared wavelength can be preset to 6 micrometers or more and less than 23 micrometers.
- the radiant energy input unit 15 may input radiant energy of 3 W / (m 2) (sr) ( ⁇ m) or more.
- an infrared wavelength can be preset to 6 micrometers or more and less than 19 micrometers.
- the radiant energy input unit 15 may input radiant energy of 4 W / (m 2) (sr) ( ⁇ m) or more.
- the infrared wavelength may be preset to more than 6 ⁇ m and less than 18 ⁇ m.
- the radiant energy input unit 15 may input radiant energy of 5 W / (m 2) (sr) ( ⁇ m) or more.
- the infrared wavelength may be preset to 7 ⁇ m or more and 17 ⁇ m or less.
- the radiant energy input unit 15 may input radiant energy of 6 W / (m 2) (sr) ( ⁇ m) or more.
- the infrared wavelength may be preset to 7 ⁇ m or more and 16 ⁇ m or less.
- the radiant energy input unit 15 may input radiant energy of 7 W / (m 2) (sr) ( ⁇ m) or more.
- an infrared wavelength can be preset to 8 micrometers or more and less than 14 micrometers.
- the radiant energy input unit 15 may input radiant energy of 8 W / (m 2) (sr) ( ⁇ m) or more.
- the infrared wavelength may be preset to 9 ⁇ m or more and 11 ⁇ m or less.
- the radiant energy input unit 15 may input radiant energy of 9 W / (m 2) (sr) ( ⁇ m) or more.
- the radiation rate setting unit 11, the radiation energy input unit 15 and the calculation unit 17 may be composed of a radiation thermometer (10, Pyrometer) is installed in the mounting portion (B) to measure the calculated temperature.
- the radiation thermometer 10 can easily calculate the calculated temperature by modularizing the emissivity setting unit 11, the radiant energy input unit 15, and the calculation unit 17 for measuring the calculated temperature.
- the radiation thermometer 10 may be preset with an emissivity value and an infrared wavelength suitable for the purpose.
- the above-described radiation thermometer 10 may be provided spaced apart from the substrate W at the interface with respect to the substrate (W). In this case, an error in the calculated temperature caused by scattering of light and interference of light with respect to the chemical liquid C can be corrected.
- the above-described radiation thermometer 10 may be provided spaced apart from the substrate (W) on the opposite side of the interface with respect to the substrate (W). In this case, by minimizing the influence on scattering of light and interference of light with respect to the chemical liquid C, the error range of the calculated temperature can be minimized by suppressing or preventing the error of the calculated calculated temperature.
- the above-described radiant energy input unit 15 or radiation thermometer 10 is wrapped and protected by the protection unit 19.
- the protection unit 19 it is possible to prevent the radiation energy input unit 15 or the radiation thermometer 10 from malfunctioning due to the vapor generated by the heating of the chemical liquid C.
- the protection unit 19 is preferably made of a transparent material such as a window or a beam pipe so that the infrared wavelength is stably transmitted, prevents an error of the input radiation energy, and does not interfere with the ambient temperature.
- the substrate treating apparatus may further include a controller 30 and a heater 20.
- the controller 30 compares the predetermined process temperature with the calculated temperature calculated by the calculator 17 to etch or clean the substrate W.
- control unit 30 compares the signal of the signal conversion unit 31, which converts the calculated temperature calculated by the calculation unit 17 into an analog or digital signal, and the signal according to the predetermined process temperature. It may include a controller 33 for transmitting the difference between the two signals.
- the signal converter 31 may be included in the radiation thermometer 10.
- controller 30 may control the operation of the entire substrate processing apparatus.
- the controller 33 may display the signal received from the signal converter 31 as a number or store the data for comparison so that a worker can recognize the signal. In addition, the controller 33 may determine whether the process is abnormal according to the difference between the two signals and inform the operator.
- the heater 20 is spaced apart from the substrate W to heat the chemical liquid C contacting the substrate W or the substrate W according to a signal from the controller 30.
- the heater 20 may be provided in the installation part (B).
- the heater 20 may be integrally formed with the radiant energy input unit 15 or the radiation thermometer 10.
- the heater 20 may be configured as an infrared heater to heat the substrate (W).
- the heater 20 can supply the chemical liquid C at room temperature to the substrate W by heating the substrate W or the chemical liquid C in contact with the substrate W, and the temperature of the chemical liquid C can be easily controlled.
- the concentration of the chemical liquid (C) and the composition change of the chemical liquid (C) according to the heating can be suppressed or prevented.
- the controller 30 operates the heater 20 in response to the calculated temperature measured by the radiation thermometer 10.
- the controller 30 may control the heating operation of the heater 20 by comparing the calculated temperature with a predetermined process temperature for processing the substrate W by a difference value between the calculated temperature and the predetermined process temperature.
- the calculated temperature when the calculated temperature is included in the preset process temperature in the signal of the controller 30, the calculated temperature of the chemical liquid C or the interface contacting the substrate W through the radiation thermometer 15 may be continuously measured. Can be.
- the controller 30 controls the control signal according to the difference between the calculated temperature and the preset process temperature so that the calculated temperature reaches the preset process temperature.
- the temperature of the chemical liquid C in contact with the substrate W or the substrate W can be adjusted by transmitting the power to the heater 20 to raise or lower the output of the heater 20.
- the processing temperature required for the single wafer wet etching or washing process can be stably maintained, and the precision of the single wafer wet etching or washing process can be improved.
- the process temperature is kept constant in the wet etching process for the selective or the entire substrate (W) according to an embodiment of the present invention, the pattern width, pattern spacing, and pattern thickness according to the fine pattern of the substrate (W)
- the substrate W may be etched by improving the accuracy of the etching depth.
- the process temperature is kept constant in the wet cleaning process, the surface tension is stably lowered according to the chemical liquid in contact with the substrate W, thereby facilitating the penetration of the chemical liquid between the fine patterns of the substrate W, and due to the surface tension. It is possible to prevent contact between adjacent patterns and to prevent the pattern from being deformed or collapsed by surface tension.
- the chemical liquid C at normal temperature contacted with the substrate W may be heated to be etched or cleaned.
- phosphoric acid used as the chemical liquid (C)
- the substrate W includes a center region w1 corresponding to the rotation center portion of the table 53, an edge region w2 corresponding to an edge portion according to the rotation of the table 53, and a center region w1.
- the variable region w3 may be formed in plural numbers.
- the radiant energy input unit 15 and the heater 20 are disposed in the center region w1, the edge region w2, and the variation region w3, respectively, and the controller 30 controls the center region w1 and the edge region ( The heater 20 can be operated separately in the w2) and the fluctuation region w3.
- Substrate processing apparatus may further include a chamber (50).
- the chamber 50 stably seats and supports the substrate W, and supplies the chemical liquid C to the substrate W.
- FIG. The chamber 50 includes a table 53, a support 54, and a nozzle 55.
- the chamber 50 is a single wafer type wet etching or cleaning process, and in processing the substrate W, the chemical liquid C can be supplied, etched, cleaned, and dried without moving the substrate W. Inlining can be realized and the wet etching or cleaning process can be automated.
- the single chamber 50 is easier to manage the processing state of the individual substrates W and manages the substrates W, prevents the movement of contaminants between the substrates W, and minimizes the consumption of the chemical liquid C. can do.
- the sheet-type chamber 50 is easier to replace the chemical liquid (C) in the process of the wet-type wet etching or cleaning process compared to the batch chamber, and the new chemical liquid (C) is added to each individual substrate (W) each time. It is supplied and it is easy to manage the concentration of the chemical liquid (C).
- the sheet type chamber 50 can secure the processing uniformity of the substrate W in response to the larger size of the substrate W than the batch type chamber, and can reduce the manufacturing cost of the chamber 50.
- the batch chamber may deposit the substrate W in the chemical liquid C to perform a wet etching or cleaning process.
- the batch chamber may deposit a cassette (not shown) on which a plurality of substrates W are disposed in the chemical solution C to perform a wet etching or cleaning process.
- the table 53 is rotatably arranged in the chamber 50.
- the table 53 is rotated through the diffuser 57.
- the chemical liquid C may be in contact with the substrate W and coated with a uniform thickness.
- the diffusion part 57 may provide an injection pressure to the nozzle 55 such that the chemical liquid C is supplied to the substrate W from the nozzle 55.
- the support 54 is provided on the table 53, and supports the substrate W apart from the table 53. By supporting the edge of the substrate W, the support 54 can prevent damage such as scratches from occurring on the surface of the substrate W.
- the nozzle 55 supplies the chemical liquid C to the substrate W. As shown in FIG. The nozzle 55 is spaced apart from the substrate W below. The nozzle 55 may be disposed at the center of rotation of the table 53 to supply the chemical liquid C to the substrate W. FIG. Although not shown, the nozzle 55 may be spaced apart from the upper side of the substrate W, and may supply the chemical liquid C to the substrate W while swinging by a separate swing means.
- the nozzle 55 when the nozzle 55 is provided below the substrate W, it is easier to remove contaminants generated in the wet type wet etching or cleaning process than having the nozzle 55 above the substrate W. In addition, the contamination by the scattering of the chemical liquid (C) can be suppressed, and the consumption amount of the chemical liquid (C) can be reduced.
- the chemical liquid C supplied to the substrate W may be recovered through the discharge part 51 provided in the chamber 50.
- the discharge part 51 forms a discharge path of contaminants such as fumes or foreign substances due to heating of the chemical liquid generated in the wet type wet etching or cleaning process according to the contact between the substrate W and the chemical liquid C.
- the discharge part 51 may be provided with a separate suction force to suck and discharge the contaminants.
- the discharge part 51 may be formed along the edge of the substrate W seated in the chamber 50.
- the radiant energy input unit 15 is spaced apart from the substrate W, and the nozzle 55 is spaced apart from the substrate W, thereby preventing scattering of light and interference of light with respect to the chemical liquid C.
- the error range of the calculated temperature can be minimized by suppressing or preventing the error of the calculated temperature.
- the chemical liquid C at room temperature can be supplied in the form of a mist to the lower surface of the substrate W, even at a high temperature above the boiling point of the chemical liquid C.
- the leaf wet etching or cleaning process may be performed.
- chemical liquid (C) may be provided with at least one nozzle 55, the chemical liquid line 58 and the chemical liquid tank (59). At this time, the chemical liquid (C) of the chemical liquid tank 59 may be heated to a temperature equal to or less than the process temperature.
- the substrate treating apparatus controls the temperature of the chemical liquid C in contact with the substrate W as well as the chemical liquid C in contact with the substrate W through a monitoring function.
- a monitoring function By monitoring the temperature change of the chemical liquid (C), problems in the single wafer wet etching or cleaning process due to the temperature change of the chemical liquid (C) can be found, and the etching or cleaning state of the substrate (W) can be checked.
- the substrate treating apparatus is spaced apart from the upper surface of the substrate (W) by adjusting the temperature of the chemical liquid (C) in contact with the substrate (W) or the substrate (W) through the heater 20,
- the chemical liquid C at room temperature may be supplied to the lower surface of the substrate W in the form of a mist, and a single wet type wet etching or cleaning process may be performed even at a high temperature higher than the boiling point of the chemical liquid C.
- the substrate treating apparatus has no heat loss due to the progress of the single wet type wet etching or cleaning process even when the chemical liquid (C) is added thereto, and the temperature required for the single wet type wet cleaning or cleaning process is maintained. It can be easily adjusted to maintain optimized temperature conditions.
- the same components as those of the substrate treating apparatus according to the embodiment of the present invention are denoted by the same reference numerals, and description thereof will be omitted.
- FIG. 6 is a view showing a substrate processing apparatus according to another embodiment of the present invention.
- the position of the nozzle 55 is changed.
- the radiant energy input unit 15 and the nozzle 55 are spaced apart from each other above the substrate W, so that in the single wafer wet etching or cleaning process, the nozzle 55 is disposed above the substrate W. It is possible to easily remove the generated contaminants, suppress contamination by scattering of the chemical liquid (C), and suppress consumption of the chemical liquid (C).
- the radiant energy input unit 15 and the nozzle 55 it is possible to supply the chemical liquid C at room temperature to the upper surface of the substrate W in the form of a liquid, even at a high temperature above the boiling point of the chemical liquid C.
- the leaf wet etching or cleaning process may be performed.
- FIG. 7 is a flow chart showing a substrate processing method according to an embodiment of the present invention
- Figure 8 shows an experimental apparatus for detecting the characteristics of the radiation thermometer for the chemical liquid in the substrate processing method according to an embodiment of the present invention
- 9 is a structural diagram showing an experimental device for detecting the characteristics of the radiation thermometer for the substrate immersed in the chemical liquid in the substrate processing method according to an embodiment of the present invention
- Figure 10 is an embodiment of the present invention
- FIG. 11 is a structural diagram illustrating an experimental apparatus for detecting characteristics of a radiation thermometer at an interface between a substrate and a chemical liquid in a substrate processing method according to an embodiment
- FIG. It is a structural diagram which shows the experiment apparatus for checking.
- the radiant energy radiated at the interface between the chemical liquid C or the chemical liquid C and the substrate W may be measured.
- the substrate W was a silicon wafer.
- the substrate W may use silicon carbide (SiC), sapphire wafer, quartz, or the like.
- the experimental group spaced apart the radiation thermometer 10 on one side of the substrate (W), and the black body and the heating heater (63) in turn spaced apart on the other side of the substrate (W), and then the heating heater (63) While radiating the black body through the heating temperature to measure the radiant energy.
- control for this is arranged to space apart the radiation thermometer 10 on one side of the black body, the heating heater 63 is arranged on the other side of the black body, then heated while heating the black body through the heating heater 63 in the same manner as the experimental group Measure radiant energy with temperature.
- the experimental group and the control group are substantially the same radiation energy is measured, the substrate (W) is characterized by the transmission of the infrared wavelength.
- infrared wavelengths are transmitted even when the film quality or film thickness of the substrate W is different. Appears.
- the chemical liquid (C) in the test tank 60 for this experiment, and place the radiation thermometer 10 apart from the surface of the chemical liquid (C). Then, the chemical liquid C is heated through the heating heater 63, and the emissivity of the chemical liquid C is measured while changing the temperature of the chemical liquid C. In this case, the temperature of the chemical liquid (C) can be measured by immersing the thermocouple 61 in the chemical liquid (C).
- the properties of the radiation thermometer 10 for the chemical liquid (C) used in the photoresist removal process also exhibits a property that the emissivity of the chemical liquid (C) remains substantially constant regardless of the temperature.
- the chemical liquid C is heated through the heating heater 63, and the substrate W immersed in the chemical liquid C is moved from the surface of the chemical liquid C for each depth, according to the set temperature of the chemical liquid C.
- the temperature of the substrate W and the emissivity of the chemical liquid C are measured and shown in Table 1 below.
- the temperature of the substrate W may be measured by connecting the thermocouple 61 to the substrate W.
- the chemical liquid (C) uses 85% by weight of phosphoric acid, and when the chemical liquid (C): pure ratio is 1: 2, the phosphoric acid contains about 39% by weight, and the chemical liquid (C): pure ratio of 1: If 1, phosphoric acid contains about 53% by weight.
- the chemical liquid C is heated through the heating heater 63, and the type of the chemical liquid C is changed while the substrate W is brought into contact with the surface of the chemical liquid C to the set temperature of the chemical liquid C.
- the temperature of the substrate W and the emissivity of the chemical liquid C are measured and shown in Table 2 below.
- the temperature of the substrate W may be measured by connecting the thermocouple 61 to the substrate W.
- the emissivity changes as the concentration of the chemical liquid (C) changes, but for the same concentration, the emissivity remains substantially constant.
- the temperature of the test block 80 and whether the contact of the chemical liquid (C) is measured may be measured.
- the temperature of the substrate W may be measured by connecting the thermocouple 61 to the substrate W.
- the substrate (W) in the room temperature region is characterized by the transmission of infrared wavelengths.
- the infrared wavelength is transmitted.
- the emissivity is substantially the same.
- the amount of the chemical liquid (C) shows a characteristic that the infrared wavelength is emitted even if a trace amount is present at the measurement point.
- the substrate processing method includes a measuring step S1 and a calculating step S2.
- the measuring step S1 the radiant energy radiated at the interface between the chemical liquid C contacting the substrate W or the substrate W and the chemical liquid C is measured.
- the measuring step (S1) measures the radiant energy radiated at the chemical liquid (C) or interface through the radiation thermometer (10), and inputs to the radiant energy input unit (15).
- the emissivity at the interface between the chemical liquid C contacting the substrate W or the substrate W and the chemical liquid C is separately measured, and the measured emissivity is measured at the emissivity setting unit 11.
- the calculating step S2 calculates the calculation temperature of the chemical liquid C or the interface in contact with the substrate using the radiant energy measured through the measuring step S1 and the emissivity of the chemical liquid C.
- the calculating step S2 may calculate the calculated temperature using the absolute temperature T calculated according to Equation 2 below.
- E ( ⁇ , T) is the radiant energy measured through the measuring step (S1)
- ⁇ is a preset infrared wavelength
- ⁇ is the emissivity of the chemical liquid (C)
- T the absolute temperature
- k is the Boltzmann constant.
- the calculated temperature can be measured accurately.
- the infrared wavelength may be preset to more than 4 ⁇ m 30 ⁇ m.
- Radiation energy emitted by an object follows Plank's law. At lower temperatures, the peak wavelength is shifted to longer wavelengths.
- the wavelength at which the radiant energy of 1 W / (m 2) (sr) ( ⁇ m) or more can be measured is in the range of more than 4 ⁇ m and 30 ⁇ m or less,
- the peak wavelength is 10 ⁇ m.
- the infrared wavelength may be preset to more than 4 ⁇ m and 30 ⁇ m or less.
- the infrared wavelength may be preset to 5 ⁇ m or more and less than 25 ⁇ m.
- the measuring step (S1) can measure the radiant energy of 2 W / (m 2) (sr) ( ⁇ m) or more.
- an infrared wavelength can be preset to 6 micrometers or more and less than 23 micrometers.
- the measuring step (S1) can measure the radiant energy of 3 W / (m 2) (sr) ( ⁇ m) or more.
- an infrared wavelength can be preset to 6 micrometers or more and less than 19 micrometers.
- the measuring step (S1) can measure the radiant energy of 4 W / (m 2) (sr) ( ⁇ m) or more.
- the infrared wavelength may be preset to more than 6 ⁇ m and less than 18 ⁇ m.
- the measuring step (S1) can measure the radiant energy of 5 W / (m 2) (sr) ( ⁇ m) or more.
- the infrared wavelength may be preset to 7 ⁇ m or more and 17 ⁇ m or less.
- the measuring step (S1) can measure the radiant energy of 6 W / (m 2) (sr) ( ⁇ m) or more.
- the infrared wavelength may be preset to 7 ⁇ m or more and 16 ⁇ m or less.
- the measuring step (S1) can measure the radiant energy of 7 W / (m 2) (sr) ( ⁇ m) or more.
- the infrared wavelength may be preset to 8 ⁇ m or more and less than 14 ⁇ m.
- the measuring step (S1) can measure the radiant energy of 8 W / (m 2) (sr) ( ⁇ m) or more.
- the infrared wavelength may be preset to 9 ⁇ m or more and 11 ⁇ m or less.
- the measuring step (S1) can measure the radiant energy of 9 W / (m 2) (sr) ( ⁇ m) or more.
- Substrate processing method may further include a comparison step (S3).
- a predetermined process temperature and a calculated temperature are compared to process the substrate W for etching or cleaning.
- the process temperature and the calculated temperature may be compared by the controller 33 of the controller 30.
- the comparison step S3 and the correction step S4 are performed through the heater 20 and the control unit 30.
- the preset process temperature may be set to a temperature value or to a temperature range depending on the processing conditions of the single wafer wet etching or washing process.
- the signal received from the signal conversion unit 31 by the controller 33 may be displayed as a number so as to be recognized by an operator or stored as data for comparison.
- the temperature of the chemical liquid C contacting the substrate W or the substrate W may be adjusted.
- the measurement step (S1) is performed again.
- the correction step S4 heats the chemical liquid C in contact with the substrate W or the substrate W according to the difference between the calculated temperature and the predetermined process temperature.
- the output of the heater 20 may be adjusted according to a control signal transmitted from the controller 30 to adjust the degree of heating the substrate W or the chemical liquid C in contact with the substrate W. .
- the above-described calculation temperature is a temperature calculated by the calculation unit 17, the process temperature is a theoretical temperature calculated for etching or cleaning the substrate W according to the type of the chemical liquid (C), the processing temperature is the substrate W Actual temperature of chemical liquid (C) in contact with
- the signal received from the signal conversion unit 31 by the controller 33 may be displayed numerically so that an operator can recognize it.
- data for comparison may be stored.
- the substrate processing method As follows.
- the process conditions such as the kind of the chemical liquid (C), the amount of the chemical liquid (C), and the injection time of the chemical liquid (C) may be preset by an operator.
- Radiant energy emitted at the chemical liquid C in contact with the substrate W or at the interface between the chemical liquid C and the substrate W is incident on the radiation energy input unit 15.
- the radiation energy in the infrared region is used, and the incident radiation energy is an analog signal in which intensity changes continuously with time.
- the calculation unit 17 calculates the calculated temperature through the radiant energy incident on the radiant energy input unit 15 and the emissivity set in the emissivity setting unit 11. At this time, the calculated temperature is a digital signal is converted into an analog signal through the signal conversion unit 31 is transmitted to the controller 33.
- the controller 33 may compare the preset process temperature with the calculated output temperature to determine whether the process is abnormal and inform the operator.
- the treatment temperature can be accurately and efficiently managed by directly measuring the temperature of the chemical liquid C or the interface in contact with the substrate W.
- the present invention can grasp the change in the temperature distribution in the substrate (W) can be used as a basis for identifying the cause of the yield decrease in the etching process or the cleaning process, and further predict the process failure.
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Abstract
Description
Claims (15)
- 기판에 접촉되는 약액 또는 상기 기판과 상기 약액이 접촉되는 계면에서의 방사율이 입력되는 방사율설정부;상기 약액 또는 상기 계면에서 방사되는 복사에너지가 입력되는 복사에너지입력부; 및상기 방사율과 상기 복사에너지에 기초하여 상기 약액 또는 상기 계면의 산출온도를 계산하는 산출부;를 포함하는 것을 특징으로 하는 기판처리장치.
- 제 1항에 있어서,회전 가능하게 배치되는 테이블과, 상기 테이블에서 상기 기판을 이격 지지하는 서포트와, 상기 기판에 상기 약액을 공급하는 노즐이 포함되는 챔버;를 더 포함하는 것을 특징으로 하는 기판처리장치.
- 제 2항에 있어서,상기 노즐은,상기 기판의 하측에 이격 배치되는 것을 특징으로 하는 기판처리장치.
- 제 1항에 있어서,상기 복사에너지입력부와 상기 방사율설정부와 상기 산출부를 포함하여 상기 산출온도를 측정하도록 방사온도계(Pyrometer)로 구성되며, 상기 방사온도계는 상기 기판의 상측으로 이격 배치된 설치부에 설치되는 것을 특징으로 하는 기판처리장치.
- 제 1항에 있어서,상기 복사에너지입력부를 감싸 보호하는 보호부;를 더 포함하는 것을 특징으로 하는 기판처리장치.
- 제 1항에 있어서, 상기 복사에너지입력부는,상기 기판을 기준으로 상기 계면이 위치한 반대측에서 상기 기판과 이격되어 구비되는 것을 특징으로 하는 기판처리장치.
- 제 2항에 있어서,상기 기판을 식각 또는 세정하기 위해 기설정된 공정온도와 상기 산출온도를 비교하는 제어부;를 더 포함하는 것을 특징으로 하는 기판처리장치.
- 제 8항에 있어서,상기 기판의 상측에 이격 배치되어 상기 제어부의 신호에 따라 상기 기판 또는 상기 기판에 접촉된 상기 약액을 가열하는 히터;를 더 포함하는 것을 특징으로 하는 기판처리장치.
- 제 9항에 있어서,상기 기판은,상기 테이블의 회전 중심 부분에 대응하는 중심영역과, 상기 테이블의 회전에 따른 가장자리 부분에 대응하는 에지영역과, 상기 중심영역과 상기 에지영역 사이를 구획하는 변동영역으로 구분되고,상기 복사에너지입력부와 상기 히터는,상기 중심영역과 상기 에지영역과 상기 변동영역에 각각 배치되며,상기 제어부는,상기 중심영역과 상기 에지영역과 상기 변동영역에서 개별적으로 상기 히터를 동작시키는 것을 특징으로 하는 기판처리장치.
- 기판에 접촉되는 약액 또는 상기 기판과 상기 약액이 접촉되는 계면에서 방사되는 복사에너지를 측정하는 측정단계; 및상기 측정단계를 거쳐 측정된 상기 복사에너지와, 상기 약액 또는 상기 계면에서의 방사율을 기초로 상기 기판에 접촉된 상기 약액 또는 상기 계면의 산출온도를 산출하는 산출단계;를 포함하는 것을 특징으로 하는 기판처리방법.
- 제 11항에 있어서,상기 산출단계는, 아래의 [수학식 4]에 따라 계산되는 절대온도(T)를 이용하여 상기 산출온도를 산출하는 것을 특징으로 하는 기판처리방법.[수학식 4]여기서,단, E(λ,T)는 상기 측정단계를 통해 측정되는 복사에너지이고,λ는 상기 복사에너지가 입력되는 복사에너지입력부에 따라 기설정된 적외선 파장이며,ε은 상기 약액 또는 상기 계면에서의 방사율이고,T 는 절대온도이며,h 는 플랑크 상수(Plank constant)이고,c는 광속이며,k는 볼츠만 상수(Boltzmann constant)임.
- 제 11항에 있어서,상기 기판을 식각 또는 세정하기 위해 기설정된 공정온도와 상기 산출단계를 거쳐 산출된 상기 산출온도를 비교하는 비교단계;를 더 포함하는 것을 특징으로 하는 기판처리방법.
- 제 13항에 있어서,상기 비교단계를 거치면서 상기 산출온도가 기설정된 공정온도에 포함되는 경우, 상기 측정단계를 실시하는 것을 특징으로 하는 기판처리방법.
- 제 14항에 있어서,상기 비교단계를 거치면서 상기 산출온도가 기설정된 공정온도에 포함되지 않는 경우, 상기 산출온도와 기설정된 공정온도의 차이값에 따라 상기 기판 또는 상기 기판에 접촉되는 상기 약액을 가열하는 보정단계;를 더 포함하는 것을 특징으로 하는 기판처리방법.
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| CN201580054262.9A CN106796902B (zh) | 2015-08-27 | 2015-08-27 | 基板处理装置及基板处理方法 |
| JP2017501038A JP6452799B2 (ja) | 2015-08-27 | 2015-08-27 | 基板処理装置と基板処理方法 |
| PCT/KR2015/009001 WO2017034057A1 (ko) | 2015-08-27 | 2015-08-27 | 기판처리장치와 기판처리방법 |
| US15/329,020 US10190913B2 (en) | 2015-08-27 | 2015-08-27 | Substrate processing apparatus and method |
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| GB201901637D0 (en) | 2019-02-06 | 2019-03-27 | Lam Res Ag | Apparatus for processing a wafer, and method of controlling such an apparatus |
| AT16977U3 (de) * | 2020-02-20 | 2021-03-15 | 4Tex Gmbh | Verfahren zum Behandeln von Substraten mit Chemikalien |
| JP7546418B2 (ja) * | 2020-09-09 | 2024-09-06 | 東京エレクトロン株式会社 | 基板処理方法および基板処理装置 |
| JP2025149647A (ja) * | 2024-03-26 | 2025-10-08 | 芝浦メカトロニクス株式会社 | 基板処理装置 |
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- 2015-08-27 WO PCT/KR2015/009001 patent/WO2017034057A1/ko not_active Ceased
- 2015-08-27 US US15/329,020 patent/US10190913B2/en active Active
- 2015-08-27 CN CN201580054262.9A patent/CN106796902B/zh active Active
- 2015-08-27 JP JP2017501038A patent/JP6452799B2/ja active Active
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| US20040023421A1 (en) * | 2001-10-30 | 2004-02-05 | Satoshi Shibata | Temperature measuring method, heat treating method, and semiconductor device manufacturing method |
| KR100876539B1 (ko) * | 2006-05-12 | 2008-12-31 | 코닉시스템 주식회사 | 복사율을 이용하는 fpd 전극패턴 소성검사장치 및 소성검사방법 |
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| KR20110138790A (ko) * | 2010-06-22 | 2011-12-28 | 동우옵트론 주식회사 | 복수열의 웨이퍼포켓을 갖는 웨이퍼 박막증착장비의 인시츄 모니터링 장치 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10720343B2 (en) | 2016-05-31 | 2020-07-21 | Lam Research Ag | Method and apparatus for processing wafer-shaped articles |
| US10861719B2 (en) | 2016-05-31 | 2020-12-08 | Lam Research Ag | Method and apparatus for processing wafer-shaped articles |
| WO2018211439A1 (en) * | 2017-05-17 | 2018-11-22 | Lam Research Ag | Systems and methods for detecting undesirable dynamic behavior of liquid dispensed onto a rotating substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106796902A (zh) | 2017-05-31 |
| JP6452799B2 (ja) | 2019-01-16 |
| US10190913B2 (en) | 2019-01-29 |
| CN106796902B (zh) | 2019-11-01 |
| US20180156665A1 (en) | 2018-06-07 |
| JP2017530543A (ja) | 2017-10-12 |
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