WO2005029020A1 - 基板処理装置およびデバイスの製造方法 - Google Patents
基板処理装置およびデバイスの製造方法 Download PDFInfo
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- WO2005029020A1 WO2005029020A1 PCT/JP2004/013779 JP2004013779W WO2005029020A1 WO 2005029020 A1 WO2005029020 A1 WO 2005029020A1 JP 2004013779 W JP2004013779 W JP 2004013779W WO 2005029020 A1 WO2005029020 A1 WO 2005029020A1
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- WO
- WIPO (PCT)
- Prior art keywords
- emissivity
- substrate
- processing
- processing apparatus
- measuring
- Prior art date
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- 238000012545 processing Methods 0.000 title claims abstract description 154
- 239000000758 substrate Substances 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims description 27
- 238000005259 measurement Methods 0.000 claims abstract description 36
- 238000012546 transfer Methods 0.000 claims description 22
- 230000003287 optical effect Effects 0.000 claims description 17
- 238000003860 storage Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims 1
- 238000005137 deposition process Methods 0.000 claims 1
- 235000012431 wafers Nutrition 0.000 description 70
- 239000000523 sample Substances 0.000 description 18
- 238000001514 detection method Methods 0.000 description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000009529 body temperature measurement Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 241000384942 Premna serratifolia Species 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- 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
Definitions
- the present invention relates to a substrate processing apparatus and a method for manufacturing a device, and more particularly, to a substrate processing apparatus suitably used for manufacturing a semiconductor device and a method for manufacturing a device using the same.
- FIG. 1 Conventionally, as this type of substrate processing apparatus, for example, an apparatus as shown in FIG. 1 has been used.
- a susceptor 103 is installed inside a processing chamber 101, and a wafer 102 is mounted on the susceptor 103.
- the wafer 102 is heated by the heating means 104, and a predetermined reaction gas is allowed to flow into the processing chamber 101 to process the wafer 102, if necessary.
- the temperature of the wafer 102 is the force measured by the temperature measuring probe 107.
- the wafer temperature measured by the temperature measuring probe 107 is measured by the emissivity measuring probe 105 provided in the emissivity measuring unit 106.
- the temperature of the wafer 102 is detected after being corrected by the emissivity.
- Such a conventional substrate processing apparatus has a drawback that the uniformity of the wafer is deteriorated because the temperature of the wafer is locally reduced due to the emissivity measurement unit located above the wafer.
- a main object of the present invention is to provide a substrate processing apparatus capable of shortening the processing time of a substrate and improving the uniformity of the substrate processing, and a method of manufacturing a device using the same. .
- a substrate processing apparatus comprising: an emissivity measuring member for measuring an emissivity of a surface; and a storage unit for storing a measurement result.
- An emissivity measuring device provided in the processing furnace
- the emissivity of the film is periodically monitored by the emissivity measuring device during the processing of the substrate, and the measured emissivity is measured.
- a substrate processing apparatus is provided.
- An emissivity measurement member for measuring the emissivity of the surface of at least one of the substrates before and after the processing in a place other than the processing furnace for processing the substrate, and a storage unit for storing the measurement results.
- a method for manufacturing a device comprising a step of processing a substrate.
- FIG. 1 is a schematic longitudinal sectional view for explaining a processing furnace used in a conventional substrate processing apparatus.
- FIG. 2 is a schematic diagram for explaining an emissivity measurement and temperature measurement system used in an example of the present invention.
- FIG. 3 is a schematic longitudinal sectional view for explaining a substrate processing apparatus according to an embodiment of the present invention.
- FIG. 4 is a diagram showing the relationship between the emissivity and wavelength of silicon.
- FIG. 5 is a diagram showing the relationship between the thickness of SiO on Si and the emissivity.
- an emissivity measuring means for measuring the emissivity of at least one of the substrate surfaces before and after the processing in a place other than the processing furnace for processing the substrate; And a storage unit for storing.
- the emissivity measurement is performed in the atmosphere transfer chamber (aranai section), the load lock chamber, or the cooling chamber. Means. More preferably, the emissivity measured by the emissivity measuring means is automatically reflected in the substrate processing.
- the emissivity of one or more substrates is automatically measured, and the result is automatically reflected in all substrate processing. I do. In this case, it is basically useful for the initial value of the temperature correction.
- the emissivities of all the substrates are automatically measured.
- an emissivity measuring means is provided in the atmosphere transfer chamber (aranai part), the load lock chamber or the cooling chamber, and the emissivity is measured by the emissivity measuring means on the substrate before, after, or before and after the processing. And detect abnormalities (including the previous process).
- the processing status can be checked by comparing it with a specified value, and by measuring the emissivity of the substrate before and after the processing, for example, the processing of the substrate such as film formation can be performed normally. You can check whether you have been.
- the temperature of the substrate is measured by a radiation thermometer, and an emissivity measuring device is provided inside or outside the processing furnace, and the emissivity measuring device is used to measure the emissivity measuring device.
- a system for correcting the wafer temperature is provided, and the filter characteristics of the optical filter of the radiation thermometer and the optical filter of the emissivity meter are made the same.
- the photoelectric conversion element of the radiation thermometer and the photoelectric conversion element of the emissivity measuring device are the same.
- a measuring instrument for measuring the temperature based on the light intensity (photon density, light emission amount) emitted from the substrate, and a light for limiting the wavelength of light inside the measuring instrument.
- a filter having an optical filter median force of 1.1 ⁇ m and an optical filter half-width power of not more than ⁇ m.
- a measuring instrument for measuring the emissivity based on the light intensity (photon density, light emission amount) emitted from the substrate, and the wavelength of the light is limited inside the measuring instrument.
- An optical filter comprising: an optical filter having a median force of 0.5 to 1.1 ⁇ m and an optical filter having a half-value width of 0.2 ⁇ m or less.
- a radiation measuring instrument is provided in the processing furnace, and the substrate is carried into the processing furnace and then unloaded.
- the emissivity can be measured temporarily or periodically with an emissivity meter during part or all of the time, and abnormalities can be detected from the measurement results.
- an emissivity measuring device is provided in the processing furnace, and a part or all of the time from when the wafer is carried into the processing furnace to when the wafer is unloaded is temporarily or periodically radiated by the emissivity measuring device. By measuring the rate, the end point of the process can be detected from the measurement result.
- An emissivity measuring device provided in the processing furnace
- the emissivity of the film is periodically monitored by the emissivity measuring device during the processing of the substrate, and the measured emissivity is measured.
- a substrate processing apparatus is provided.
- An emissivity measurement member for measuring the emissivity of the surface of at least one of the substrates before and after the processing in a place other than the processing furnace for processing the substrate, and a storage unit for storing the measurement results.
- a method for manufacturing a device comprising a step of processing a substrate.
- the emissivity of silicon is hardly dependent on temperature at 0.5-1. L / z m. Therefore, a measuring instrument equipped with an optical filter having a peak wavelength of 0.5 to 1. l ⁇ m is suitable for silicon temperature measurement and emissivity measurement. Even when the peak wavelength is 0.5 to 5-1.m, the use of an optical filter with a wide half-value width removes the emissivity from a region that does not depend on temperature, so the half-value width is less than 0.2 m. Measuring instruments with optical filters are suitable.
- Light that has entered the emissivity measurement probe 21 from the wafer 20 passes through the optical fiber cable 22 and enters the photon density detector 23. After passing through the lens 24 in the photon density detection unit 23, the peak wavelength is 0.9 m. The light of the outside wavelength is cut, and then converted into an electric signal by a photoelectric conversion element 26 using silicon as a detection element. Thereafter, the photon density (light intensity), which has become an electric signal, is output to the processing furnace main controller 10 via the electronic circuit 27. The processing furnace main control unit 10 calculates the emissivity from the electric signal, and stores it in the storage unit 11.
- the measurement of the emissivity of the wafer 20 is performed as follows. First, the emissivity measuring probe 21 is rotated so as to face a reference lamp (not shown) just above the wafer 20, and the reference lamp (not shown) is turned on. Then, the emissivity measuring probe 21 measures the incident photon density from a reference lamp (not shown). While the reference lamp (not shown) is illuminated, the emissivity measurement probe 21 then rotates and faces the wafer 20 just below the reference lamp (not shown). In this position, the emissivity measuring probe 21 measures the reflected photon density of the wafer 20. According to Planck's law, the energy released to a particular surface is related to the fourth power of the surface temperature.
- the proportionality constant is also the product of the Stefan's Boltzmann constant and the surface emissivity. Therefore, it is preferable to use the surface emissivity when determining the non-contact surface temperature.
- the total hemispherical reflectivity of the wafer 20 is calculated using the following equation, and subsequently the emissivity is obtained according to Kirchhoff's law.
- Wafer reflectance reflected light intensity Z incident light intensity
- the light that has entered the temperature measuring probe 18 from the wafer 20 passes through the optical fiber cable 17 and enters the temperature detecting unit 12. After passing through the lens 13 inside the temperature detection unit 12, light having a wavelength other than around 0.9 m is cut off by the optical filter 14 having a peak wavelength of 0.9111 and a half-value width of 2011111, and then silicon is removed. It is converted into an electric signal by the photoelectric conversion element 15 serving as a detection element. Thereafter, the wafer temperature is calculated for the photon density (light intensity) that has become an electric signal inside the electronic circuit 16, and the wafer temperature is output to the processing furnace main controller 10.
- the wafer temperature calculated by the temperature measurement probe 18 is corrected by the emissivity calculated by the emissivity measurement probe 21 and stored in the storage unit 11 so that the wafer temperature can be detected. I have.
- the optical filter 14 inside the temperature detection unit 12 is exactly the same as the optical filter 25 inside the photon density detection unit 23. Since the photoelectric conversion element 15 inside the temperature detection unit 12 is exactly the same as the photoelectric conversion element 26 inside the photon density detection unit 23, the wavelength of the emissivity calculated by the emissivity measurement probe 21 is used. Since the band and the wavelength band of the wafer temperature calculated by the temperature measuring probe 18 are exactly the same, the wafer temperature corrected by the emissivity is accurate.
- FIG. 3 is a schematic vertical sectional view for explaining the substrate processing apparatus 1 according to one embodiment of the present invention.
- the substrate processing apparatus 1 includes a processing furnace 41, a vacuum transfer chamber 42 connected to the processing furnace 41, a load lock chamber 44 connected to the vacuum transfer chamber 42, and a substrate provided in the vacuum transfer chamber 42 as a substrate.
- a vacuum robot 43 for transferring the wafer 20 between the processing furnace 41 and the load lock chamber 44, an atmosphere transfer chamber 45 connected to the port lock chamber 44, and an atmosphere transfer chamber 45 provided in the atmosphere transfer chamber 45.
- Atmosphere robot 47 which transports wafers between cassette and cassette 48, aligner 46 provided in atmosphere transfer chamber 45, processing furnace main control unit 10, and storage unit 11 provided in processing furnace main control unit 10.
- the apparatus includes a temperature detecting section 31 connected to the processing furnace main control section 10 by detecting the temperature of the wafer 20 by the radiation light from the wafer 20!
- An emissivity measuring unit 33 such as a non-contact emissivity probe for measuring the emissivity of the wafer 20 and calculating its temperature is provided in the emissivity measuring unit 33 above the load lock chamber 44 (see FIG. (Not shown).
- the emissivity can be measured while the atmosphere in the load lock chamber 44 is being changed from the atmosphere to a vacuum and the vacuum force is also changed to the atmosphere by being located above the load lock chamber 44, and the processing time can be reduced.
- the photon density detection unit 32 detects the photon density (light intensity) based on the measurement signal from the emissivity measurement unit 33, and the processing furnace main control unit 10 calculates the emissivity based on the signal from the photon density detection unit 32, The calculated emissivity is stored in the storage unit 11.
- the processing furnace 41 includes a plurality of temperature measuring probes (not shown) as temperature detecting means in the temperature detecting section 31. These temperature measuring probes are fixed to the chamber lid (not shown) of the processing furnace, and constantly measure the photon density emitted from the wafer 20 under all processing conditions.
- the temperature detector 31 calculates the wafer temperature based on the photon density measured by the temperature measurement probe, and compares it with the set temperature in the processing furnace main controller 10. Is done.
- the wafer temperature calculated by the temperature detection unit 31 is measured by the emissivity measurement unit 33, and corrected by the emissivity stored in the storage unit 11 in the processing furnace main control unit 10. Can be detected.
- the processing furnace main control unit 10 calculates any deviation as a result of the comparison, and, via a heating control unit (not shown), a lamp (not shown) serving as heating means in a heater assembly (not shown). The power supply to each of the multiple zones is controlled.
- the wafers 20 are loaded one by one into the atmospheric transfer chamber 45 ⁇ aligner 46 ⁇ load lock chamber 44 ⁇ vacuum transfer chamber 42 ⁇ processing furnace 41 ⁇ vacuum transfer chamber 42 ⁇ load lock chamber 44 ⁇ air transfer. Processed on room 45 route.
- the emissivity is automatically measured by the emissivity measuring means provided in the emissivity measuring section 33 and stored in the storage section 11.
- the wafer temperature detected by the temperature detection unit 31 is automatically corrected by the emissivity stored in the storage unit 11 in the processing furnace main control unit 10. , And detect the wafer temperature.
- the emissivity measuring unit 33 including the emissivity measuring means may be provided in the upper part of the cooling chamber (not shown) or the upper part of the arani 46.
- the emissivity can be measured during cooling in the case of the cooling chamber and during lining in the case of the arani part, and the processing time can be reduced.
- the cooling chamber is used to cool the substrate processed in the processing furnace 41, is attached to the side wall of the vacuum transfer chamber 42, and the substrate processed in the processing furnace 41 is transferred to the cooling chamber, where it is cooled. After being rejected, they were transported 44 km from the road lock room.
- the wafers 20 are loaded one by one into the atmosphere transfer chamber 45 ⁇ aligner 46 ⁇ load lock chamber 44 ⁇ vacuum transfer chamber 42 ⁇ processing furnace 41 ⁇ vacuum transfer chamber 42 ⁇ load lock chamber 44 ⁇ atmosphere transfer chamber 45. Processed by route. When only the device wafer (excluding the dummy wafer) that passes first passes through the load lock chamber, the emissivity is automatically measured by the emissivity measurement means provided in the emissivity measurement unit 33 and stored in the storage unit 11. Thereafter, when processing the first device wafer 20 in the processing furnace 41, the wafer temperature detected by the temperature detection unit 31 is stored in the processing furnace main control unit 10 based on the emissivity stored in the storage unit 11.
- the automatic correction enables detection of the wafer temperature.
- the wafer temperature is detected by automatically correcting the emissivity obtained from the first device wafer and stored in the storage unit 11 in the processing furnace main control unit 10. .
- the emissivity is measured and compared with the "specified value from which the previous emissivity power was also obtained.” Judge and generate an error.
- the emissivity is measured and compared with the “specified value obtained from the previous emissivity power”. Then, for example, if the values differ by 0.01 or more, it is determined to be abnormal and an error occurs.
- the emissivity changes depending on the film thickness.
- Figure 5 shows the relationship between the thickness of SiO on Si and the emissivity. As described above, the emissivity changes depending on the film thickness.
- the emissivity is measured and compared with the estimated emissivity. Raise the error.
- the emissivity varies depending on the film on the wafer surface.
- non-contact emissivity measuring devices such as emissivity measuring probes show the wrong emissivity when the wafer is tilted as shown in Table 1.
- the emissivity of the wafer before processing may show an abnormal value due to a processing error or wafer shift in the previous process.
- the emissivity is measured before processing, and compared with the "specified value obtained from the previous emissivity, etc.” Generate an error. Table 1 below shows the relationship between the tilt angle of the wafer and the measured emissivity.
- the emissivity of silicon does not change with temperature at around 0.9 m.
- the emissivity is monitored peripherally even during wafer processing, and if the emissivity does not change, such as anneal, if the emissivity differs from the specified value by, for example, 0.01 or more,
- the emissivity changes depending on the film thickness.
- the emissivity is periodically monitored during wafer processing, and the estimated film thickness at that time is compared with the obtained emissivity, for example, by 0.03. If they differ, it is judged as abnormal and an error occurs.
- the emissivity is periodically monitored during wafer processing, and when the emissivity value obtained from the target film thickness is reached, the process is started. Stops (gas stops, temperature drops).
- a substrate processing apparatus capable of shortening the processing time of a substrate and improving the uniformity of the substrate processing, and a device manufacturing method using the same are provided. Provided.
- the present invention can be particularly suitably used for a substrate processing apparatus for processing a semiconductor wafer and a method for manufacturing a semiconductor device using the same.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
Abstract
Description
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Priority Applications (1)
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JP2005514095A JPWO2005029020A1 (ja) | 2003-09-24 | 2004-09-22 | 基板処理装置およびデバイスの製造方法 |
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JP2003332485 | 2003-09-24 | ||
JP2003-332485 | 2003-09-24 |
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WO2005029020A1 true WO2005029020A1 (ja) | 2005-03-31 |
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PCT/JP2004/013779 WO2005029020A1 (ja) | 2003-09-24 | 2004-09-22 | 基板処理装置およびデバイスの製造方法 |
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WO (1) | WO2005029020A1 (ja) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04297054A (ja) * | 1990-04-09 | 1992-10-21 | Anelva Corp | 半導体ウエハーの処理方法および装置 |
JPH05295543A (ja) * | 1992-02-17 | 1993-11-09 | Hitachi Ltd | 真空処理装置及びそれを用いた成膜装置と成膜方法 |
-
2004
- 2004-09-22 WO PCT/JP2004/013779 patent/WO2005029020A1/ja active Application Filing
- 2004-09-22 JP JP2005514095A patent/JPWO2005029020A1/ja not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04297054A (ja) * | 1990-04-09 | 1992-10-21 | Anelva Corp | 半導体ウエハーの処理方法および装置 |
JPH05295543A (ja) * | 1992-02-17 | 1993-11-09 | Hitachi Ltd | 真空処理装置及びそれを用いた成膜装置と成膜方法 |
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