WO2007108401A1 - 半導体装置の製造方法および基板処理装置 - Google Patents
半導体装置の製造方法および基板処理装置 Download PDFInfo
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- WO2007108401A1 WO2007108401A1 PCT/JP2007/055289 JP2007055289W WO2007108401A1 WO 2007108401 A1 WO2007108401 A1 WO 2007108401A1 JP 2007055289 W JP2007055289 W JP 2007055289W WO 2007108401 A1 WO2007108401 A1 WO 2007108401A1
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- Prior art keywords
- gas
- processing
- supply
- processing chamber
- gas flow
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 62
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- 238000000034 method Methods 0.000 claims abstract description 295
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 16
- 229910052710 silicon Inorganic materials 0.000 claims description 16
- 239000010703 silicon Substances 0.000 claims description 16
- 238000000151 deposition Methods 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 6
- 229910000077 silane Inorganic materials 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 235000012431 wafers Nutrition 0.000 description 205
- 238000004140 cleaning Methods 0.000 description 104
- 239000011261 inert gas Substances 0.000 description 55
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 description 54
- 238000006243 chemical reaction Methods 0.000 description 31
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- 238000010586 diagram Methods 0.000 description 24
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- 238000009826 distribution Methods 0.000 description 20
- 230000015572 biosynthetic process Effects 0.000 description 18
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- 230000000694 effects Effects 0.000 description 13
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 13
- 235000019270 ammonium chloride Nutrition 0.000 description 11
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 5
- LXEXBJXDGVGRAR-UHFFFAOYSA-N trichloro(trichlorosilyl)silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)Cl LXEXBJXDGVGRAR-UHFFFAOYSA-N 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 4
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- 238000009434 installation Methods 0.000 description 2
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- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- DIIIISSCIXVANO-UHFFFAOYSA-N 1,2-Dimethylhydrazine Chemical compound CNNC DIIIISSCIXVANO-UHFFFAOYSA-N 0.000 description 1
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- CGRVKSPUKAFTBN-UHFFFAOYSA-N N-silylbutan-1-amine Chemical compound CCCCN[SiH3] CGRVKSPUKAFTBN-UHFFFAOYSA-N 0.000 description 1
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- QKCGXXHCELUCKW-UHFFFAOYSA-N n-[4-[4-(dinaphthalen-2-ylamino)phenyl]phenyl]-n-naphthalen-2-ylnaphthalen-2-amine Chemical compound C1=CC=CC2=CC(N(C=3C=CC(=CC=3)C=3C=CC(=CC=3)N(C=3C=C4C=CC=CC4=CC=3)C=3C=C4C=CC=CC4=CC=3)C3=CC4=CC=CC=C4C=C3)=CC=C21 QKCGXXHCELUCKW-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/34—Nitrides
- C23C16/345—Silicon nitride
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4405—Cleaning of reactor or parts inside the reactor by using reactive gases
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45563—Gas nozzles
- C23C16/45574—Nozzles for more than one gas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45563—Gas nozzles
- C23C16/45578—Elongated nozzles, tubes with holes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/52—Controlling or regulating the coating process
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/0217—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/318—Inorganic layers composed of nitrides
- H01L21/3185—Inorganic layers composed of nitrides of siliconnitrides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/0228—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition deposition by cyclic CVD, e.g. ALD, ALE, pulsed CVD
Definitions
- the present invention relates to a method for manufacturing a semiconductor device and a substrate processing apparatus for processing a plurality of substrates using processing gases of different gas types.
- thermal CVD method As a method for manufacturing a semiconductor device, for example, there is a thermal chemical vapor deposition method (thermal CVD method).
- thermal CVD method a thin film is formed on a substrate such as a wafer by using two or more kinds of processing gases of different gas types.
- a processing gas of a different gas type is supplied into a processing chamber heated to a deposition temperature, and a thin film is formed on the plurality of substrates simultaneously.
- silicon nitride is deposited on a substrate by thermally decomposing a processing gas containing silicon (Si) and a processing gas containing nitrogen (N) (for example, patents). Reference 1).
- FIG. 4 is a schematic configuration diagram showing an example of a processing furnace included in a substrate processing apparatus that simultaneously forms a thin film on a plurality of substrates.
- This substrate processing apparatus is configured, for example, as a vertical vacuum CVD apparatus.
- the processing furnace 5 includes a heater 3 and a reaction tube 4.
- a boat 8 in which a plurality of wafers 9 are stacked is inserted into the processing chamber 2 formed in the reaction tube 4.
- the processing furnace 5 is provided with a gas supply system 1 for supplying a processing gas or an inert gas of different gas types into the processing chamber 2, and an exhaust system 7 having a pump 6 for exhausting the processing chamber 2. .
- a one-system nozzle is generally used in which one nozzle is provided for each processing gas.
- This one-system nozzle is provided with one nozzle for film formation processing for each processing gas.
- the one-system nozzle is provided on the upstream side of the gas flow outside the region where the plurality of wafers 9 are present (below the processing chamber 2). Accordingly, each processing gas is supplied from one location below the processing chamber 2 toward the plurality of wafers 9 stacked on the boat 8.
- Patent Document 1 JP 2004-95940 A
- the above-described substrate processing apparatus is used to perform the substrate processing.
- a thin film having good film forming characteristics can be formed thereon.
- the flow rate of the processing gas necessary for film formation that is, the flow rate of the processing gas necessary to cover the substrate surface area is the above-mentioned even under reduced pressure. This is because it can be covered by using a treatment furnace.
- the surface area of the substrate on which the thin film is formed increases.
- a processing gas of a certain flow rate or more is supplied from one location, the pressure in the processing chamber rises, and the processing chamber is depressurized to form a film. It becomes difficult to do.
- An object of the present invention is to provide a semiconductor device manufacturing method and substrate processing capable of achieving high productivity and productivity while maintaining high-quality film formation characteristics when using processing gases of different gas types. It is to provide a physical device.
- the method includes a step of carrying a plurality of substrates into a processing chamber, and at least one element among a plurality of elements constituting a thin film formed on the main surface of the substrate, Supply of the first processing gas capable of depositing a film alone to the upstream side of the gas flow outside the region where the plurality of substrates carried into the processing chamber are disposed; and A second processing gas containing at least one other element among which the film cannot be deposited alone is outside the region where the plurality of substrates carried into the processing chamber are disposed.
- a method for manufacturing a semiconductor device comprising: forming a crystal and forming a thin film on a main surface of the plurality of substrates; and transporting the substrate after forming the thin film out of the processing chamber. Is done.
- the vertical decompression CVD apparatus is a multi-system nozure type CVD apparatus.
- This multi-system nozure type CVD apparatus is an apparatus in which a plurality of nosole for film formation processing is provided for each of one or a plurality of processing gases, and these are arranged at different positions.
- the nozzles for supplying other gas species are not limited to the multi-system nosole only for supplying one gas type.
- FIG. 1 is a detailed view of a gas supply system connected to a processing furnace 202 that constitutes a part of the substrate processing apparatus according to the first embodiment of the present invention.
- FIG. 3 is a diagram showing the configuration of the first embodiment of the present invention, and is a schematic configuration diagram of the processing furnace 202 of the substrate processing apparatus. Both processing furnaces 202 are shown as longitudinal sectional views.
- the apparatus shown in FIG. 3 includes a processing furnace 202, a gas supply system 232, and an exhaust system 231.
- the processing furnace 202 is a system for forming a predetermined thin film on the surface of a wafer 200 to be a semiconductor device (semiconductor device) using a processing gas in a sealed processing chamber 201.
- the gas supply system 232 is a system for supplying process gas, tallying gas, inert gas, and the like into the processing chamber 201 of the processing furnace 202.
- the exhaust system 231 is a system for exhausting the atmosphere in the processing chamber 201.
- the processing furnace 202 has a heater 206 as a heating mechanism.
- the heater 206 has a cylindrical shape and is vertically installed by being supported by a heater base 251 as a holding plate.
- a process tube 203 as a reaction tube is disposed concentrically with the heater 206.
- the process tube 203 has an inner tube 204 as an internal reaction tube and an outer tube 205 as an external reaction tube provided on the outside thereof.
- the inner tube 204 is heat resistant such as quartz (SiO 2) or silicon carbide (SiC).
- a processing chamber 201 is formed in the hollow cylindrical portion of the inner tube 204.
- a boat 217 as a substrate holder described later is configured to be accommodated.
- the boat 217 is configured to be able to accommodate wafers 200 as substrates in a horizontal posture and arranged in multiple stages 1J in the vertical direction.
- the outer tube 205 is made of, for example, quartz or silicon carbide. It is made of a thermal material, is formed in a cylindrical shape with an upper end larger than the outer diameter of the inner diameter force S inner tube 204 closed and a lower end opened, and is concentric with the inner tube 204.
- a manifold 209 is disposed below the outer tube 205 so as to be concentric with the outer tube 205.
- Mayu Horedo 209 is made of a metal member such as stainless steel, and is formed in a cylindrical shape with an upper end and a lower end opened.
- the manifold 209 is engaged with the inner tube 204 and the outer tube 205, respectively, and is provided so as to support them.
- a circle ring 220a as a seal member is provided between the manifold 209 and the outer tube 205.
- a gas supply system 23 2 for supplying a processing gas into the processing chamber 201 is connected to the side wall of the manifold 209 so as to communicate with the processing chamber 201.
- the gas supply system 232 is connected to a nozzle 230 as a gas introduction part.
- a processing gas supply source (not shown) is connected via a mass flow controller (MFC) 241 as a gas flow rate controller.
- MFC mass flow controller
- a gas flow rate control unit 235 is electrically connected to the MFC 241.
- the MFC 241 is configured to control at a desired timing so that the flow rate of the gas supplied into the processing chamber 201 becomes a desired amount.
- the detailed configuration of the gas supply system 232 will be described later.
- an exhaust system 231 for exhausting the atmosphere in the processing chamber 201 is provided on the side wall of the manifold 209.
- the exhaust system 231 is disposed at the lower end portion of the cylindrical space 250 formed by the gap between the inner tube 204 and the outer tube 205, and communicates with the cylindrical space 250.
- a vacuum exhaust device such as a vacuum pump is provided via a pressure sensor 245 as a pressure detector and a main valve 242. 246 is connected.
- the main valve 242 has a function of blocking between the processing chamber 201 and the vacuum evacuation device 246.
- the opening degree can be freely changed so that the pressure in the chamber 201 becomes a predetermined pressure (degree of vacuum).
- a pressure control unit 236 is electrically connected to the main valve 242 and the pressure sensor 245. Based on the pressure in the processing chamber 201 and the exhaust system 231 detected by the pressure sensor 245, the pressure control unit 236 performs main processing so that the pressure in the processing chamber 201 becomes a desired pressure at a desired timing.
- the opening of the valve 242 is configured to be feedback-controlled.
- An overpressure prevention line 233 for performing an overpressure prevention process is connected to the upstream side of the main valve 242 of the exhaust system 231.
- An overpressure prevention valve 234 is inserted in the overpressure prevention line 233.
- a seal cap 219 is provided as a furnace opening lid capable of airtightly closing the lower end opening of the manifold 209.
- the seal cap 219 is brought into contact with the lower end of the manifold 209 from the lower side in the vertical direction.
- the seal cap 219 is made of a metal such as stainless steel and has a disk shape.
- an O-ring 220b is provided as a seal member that comes into contact with the lower end of the manifold 209.
- a rotation mechanism 254 that rotates the boat 217 is installed on the side of the seal cap 219 opposite to the processing chamber 201.
- the rotating shaft 255 of the rotating mechanism 254 passes through the seal cap 219 and is connected to a boat 217 described later.
- the wafer 200 is rotated by rotating the boat 217 by the rotation mechanism 254.
- the seal cap 219 is configured to be lifted and lowered in the vertical direction by a boat elevator 115 as a lifting mechanism vertically installed outside the process tube 203. As a result, the boat 217 can be carried into and out of the processing chamber 201.
- a drive control unit 237 is electrically connected to the rotation mechanism 254 and the boat elevator 115.
- the drive control unit 237 is configured to control the rotation mechanism 254 and the boat elevator 115 so that the rotation mechanism 254 and the boat elevator 115 perform a desired operation at a desired timing.
- the boat 217 is made of a heat resistant material such as quartz (SiO 2) or silicon carbide (SiC).
- Several wafers 200 are aligned in a horizontal position and aligned with each other in the center to make multiple stages Configured to hold.
- a plurality of heat insulating plates 216 as a disk-shaped heat insulating member made of a heat resistant material such as quartz or silicon carbide are arranged in multiple stages in a horizontal posture below the boat 217.
- the heat insulating plate 216 is configured to transmit the heat from the heater 206 to the manifold 209 side.
- the wafer placement region R is composed of three regions.
- the side dummy wafer placement region R and the process are arranged in order from the top (downstream of the gas flow).
- a temperature sensor 263 as a temperature detector is installed.
- a temperature controller 238 is electrically connected to the heater 206 and the temperature sensor 263. Based on the temperature information detected by the temperature sensor 263, the temperature control unit 238 controls the energization of the heater 206 so that the temperature in the processing chamber 201 has a desired temperature distribution at a desired timing. It is configured. Specifically, the temperature control unit 238 controls the heater 206 so that the main surface temperature of the plurality of wafers 200 loaded into the processing chamber 201 is raised to a temperature at which the processing gas is thermally decomposed. It is configured.
- the temperature control unit 238 is configured to control the heater 206 so that the principal surface temperature between the plurality of wafers 200 is substantially uniform over the entire region where the plurality of wafers 200 are disposed. Yes.
- the temperature gradient is completely zero, but a temperature gradient of 0 to 10 ° C is also included.
- the gas flow rate control unit 235, the pressure control unit 236, the drive control unit 237, and the temperature control unit 238 also constitute an operation unit and an input / output unit, and are electrically connected to the main control unit 239 that controls the entire substrate processing apparatus. Connected.
- the gas flow rate control unit 235, the pressure control unit 236, the drive control unit 237, the temperature control unit 238, and the main control unit 239 are configured as a controller 240.
- the gas supply system 232 includes a nozzle 41 to 44 as a first gas supply nozzle, a nose and a nozzle 45, a second gas supply nozzle and a nozzle and a nozzle 46 to 49. And Nos, Nore 50 to 51, Self-tube 61 to 109, Air Nore 121 to 160, MFC171 to 184, and Controller 240.
- the nozzles 41 to 44 and the nozzle 45 are nozzles that are used for film formation, after-purging, tallying, and return to the atmosphere.
- the nozzles 46 to 49 and the nozzle 50 are nozzles that are used for film formation processing, after purge processing, and atmospheric return processing.
- the nozzle 51 is a nozzle that is used for both cleaning gas processing and air return processing.
- These nozzles 41 to 51 are made of, for example, quartz.
- the after purge process is a process of purifying the nozzles 41 to 51 and the processing chamber 201 with an inert gas after the film forming process is completed.
- the cleaning process is a process of cooling reaction products deposited on the process tube 203 and the nozzles 41 to 50 by the film forming process.
- the atmosphere returning process is a process for returning the pressure in the processing chamber 201 to the atmospheric pressure after the after purge process is completed.
- the piping sections 61 to 109 are pipes for supplying various gases to the nozzles 41 to 51.
- the air banorebs 121 to 160 are valves that open and close the piping sections 61 to 109, respectively.
- MFC 17 1 to: 184 is a controller for controlling the flow rate per unit time of the gas flowing in the piping sections 62 to 66, 68 to 69, 76 to 80, 82 and 88, respectively.
- the controller 240 is configured to control the opening and closing of the air valves 121 to 160 and the operations of the MFCs 171 to 184 via the gas flow rate control unit 235, respectively.
- the air valves 121 to 125 and the air valves 132 to 136 are configured to selectively supply the processing gas flowing in the piping parts 62 to 66 or the inert gas flowing in the piping parts 70 to 74 to the piping parts 89 to 93. It has the function to supply inside. Also, the air valves 151 to 155 and the air valves 156 to 160 are used to supply a cleaning gas flowing in the piping parts 83 to 87 or a gas (processing gas or inert gas) flowing in the piping parts 89 to 93 to the piping parts 105 to 109, respectively. It has the function of selectively supplying inside.
- the air valves 142 to 146 and the air valves 127 to 131 are the processing gas flowing in the piping portions 76 to 80 or the piping portion 99 to 103, and the inert gas flowing in the piping portions 103 to 103, and the piping portions 94 to 98. It has a function to selectively supply inside.
- the nozzles 41 to 44 serving as the first gas supply nozzle are configured in an L-shaped tube shape, and are set up in the vertical direction (substrate arrangement direction) along the inner wall of the processing chamber 201. (Extended).
- the base end portions of the nozzles 41 to 44 are positioned outside the side wall of the manifold 209 through a nozzle through hole formed in the side wall of the manifold 209. Further, the tip portions of the nozzles 41 to 44 are positioned in the middle of the gas flow in the region where the plurality of wafers 200 carried into the processing chamber 201 are arranged.
- the tip portions of the nozzles 41 to 44 are arranged in the middle of a plurality of different positions (heights) provided along the gas flow in the region where the plurality of wafers 200 are arranged. It is positioned at each location.
- each tip of Nozzle 4:!-44 is also under the force (upstream side of gas flow) of, for example, 100 wafers existing in the product wafer / monitor wafer placement region R.
- the above-described nodules 46 to 49 as the second gas supply nosole are also configured in an L-shaped tube shape, like the nozzles 41 to 44, and extend vertically along the inner wall of the processing chamber 201 (substrates). (Arranged in the direction of).
- the base end portions of the nozzles 46 to 49 are positioned outside the side wall of the manifold 209 through nozzle through holes formed in the side wall of the manifold 209. Further, the tips of the nozzles 46 to 49 are in the middle of the gas flow in the region where the plurality of wafers 200 are arranged, and are substantially the same position (height) as the tips of the nozzles 41 to 44. It is positioned to become.
- each tip of nozzles 46-49 is also the same as each tip of nozzles 41-44, for example, approximately 76th, approximately 51st of 100 wafers present in product wafer / monitor wafer placement region R.
- the eyes are positioned on the 26th and 1st sheet.
- the above-mentioned Nosole 45 and 50 are configured in a straight tube shape, are provided in the horizontal direction inside the processing chamber 201, and are not raised (not extended) in the vertical direction.
- the base ends of the nozzles 45 and 50 are positioned outside the sidewalls of the manifold 209 through the nozzle holes formed in the sidewalls of the manifold 209. Further, the tips of the nozzles 45 and 50 are positioned on the upstream side of the gas flow outside the wafer arrangement region R. That is, the tips of the nozzles 45 and 50 are positioned below the wafer placement region R.
- the shapes of the nozzles 45 and 50 are not limited to those described above, and may be configured as an L-shaped tube shape and may be raised in the vertical direction (may be extended).
- the above-mentioned Nozure 51 is configured as an L-shaped tube shape, and is arranged along the inner wall of the processing chamber 201. It is raised in the vertical direction.
- the base end portion of the nozzle 51 is positioned outside the side wall of the manifold 209 through a nozzle through hole formed in the side wall of the manifold 209.
- the tip of the nozzle 51 is positioned on the upstream side of the gas flow outside the wafer placement region R. That is, the tip of the nose 51 is positioned below the wafer placement region R.
- the gas flow paths in the nozzles 41 to 44 and 46 to 49 are usually much longer than the gas flow paths in the noses, holes 45, 50, and 51. Talk to me.
- the nozzles 41 to 45 are configured to be able to supply the first processing gas, respectively.
- the second process gas which is a different gas type from the first process gas, can be supplied from the nozzles 46 to 50, respectively.
- an inert gas can be supplied from the tip of each of the nozzles 41 to 50.
- the nozzles 41 to 45 are configured such that a gas cleaning cleaning gas can be supplied in addition to the processing gas and the inert gas, respectively.
- an inert gas can be supplied into the processing chamber 201 from the tip of the nozzle 51.
- the upstream end of the pipe 61 is connected to a first processing gas accumulation source (not shown), and the downstream end is connected to the upstream ends of the pipes 62 to 66.
- the downstream end portions of the piping portions 62 to 66 are connected to the upstream end portions of the piping portions 89 to 93, respectively.
- the downstream ends of the piping sections 89 to 93 are connected to the upstream ends of the piping sections 105 to 109, respectively.
- the downstream ends of the pipes 105 to 109 are connected to the base ends (gas input ports) of the nozzles 41 to 45.
- the upstream end of the piping part 75 is connected to a second processing gas accumulation source (not shown), and the downstream end is connected to the upstream end of the piping parts 76-80. ing.
- the downstream ends of the piping portions 76 to 80 are connected to the upstream ends of the piping portions 94 to 98, respectively.
- the downstream ends of the pipes 94 to 98 are connected to the base ends of the nozzles 46 to 50.
- the upstream end of the pipe 81 is connected to a cleaning gas accumulation source (not shown).
- the downstream end portion is connected to the upstream end portions of the piping portions 82 and 88.
- the downstream end of the piping part 82 is connected to the upstream end of the piping parts 83 to 87.
- the downstream end portions of the pipe portions 83 to 87 are connected to the upstream end portions of the pipe portions 105 to 109, respectively.
- the downstream end portion of the pipe portion 88 is connected to the base end portion of the nozzle 51.
- the upstream end of the piping part 88 is also connected to the downstream end of the piping part 104.
- the upstream end portion of the piping portion 104 is connected to the downstream end portion of the piping portion 68.
- the upstream end of the pipe 67 is connected to an inert gas storage source (not shown), and the downstream end is connected to the upstream ends of the pipes 68 and 69. Yes.
- the downstream end of the piping part 68 is connected to the upstream end of the piping parts 99 to 103.
- the downstream end of this piping section 99 to 103 is connected to the upstream end of the piping sections 94 to 98.
- the downstream end of the piping part 69 is connected to the upstream end of the piping parts 70 to 74.
- the downstream end of this piping section 70-74 is connected to the upstream end of the piping sections 89-93.
- the first processing gas includes a gas that includes at least one element among a plurality of elements constituting the thin film formed on the main surface of the wafer 200, and that can deposit the film alone. Used. Further, as the second processing gas, a gas that includes at least one other element among a plurality of elements constituting the thin film formed on the main surface of the wafer 200 and cannot be deposited by itself is used. Used. For example, when a silicon nitride film (SiN film) is formed on the main surface of the wafer 200, for example, DCS (
- Dichlorosilane; SiH C1) gas is used, and as the second processing gas, for example, NH (ammonium
- NH-based gas As the physical gas, for example, NH-based gas is used.
- an inert gas for example, N
- NF nitrogen trifluoride
- the first process gas is
- DCS dichlorosilane
- SiH C1 silane
- SiH (silane) gas SiH (silane) gas
- N 0 (nitrogen dioxide) gas or N ⁇ (nitrogen monoxide) gas for example, N 0 (nitrogen dioxide) gas or N ⁇ (nitrogen monoxide) gas
- the above-mentioned air valves 121 to 125 and MFC 171 to 175 are inserted into the self-pipes 62 to 66, respectively.
- the MFCs 171 to 175 are inserted upstream of the air valves 121 to 125, respectively.
- the air valves 132 to 136 are inserted into the pipes 70 to 74, respectively.
- the air valves 151 to 155 are inserted into the pipes 83 to 87, respectively.
- the above-mentioned air cylinders 156 to 160 are inserted into pipes 89 to 93, respectively.
- Aironerebu 137-141, MFC178-: 182 and Aironerebu 142-146 are inserted into the piping sections 76-80, respectively.
- MFC178 ⁇ : 182 is inserted into the Air Nore 137, 142, Air Nore 138, 143, Air Nore 139, 144, Air / Noreb 140, 145, Air / Noreb 141, 146 respectively.
- the above air valves 127 to 131 are inserted into the piping parts 99 to 103.
- the air valve 148 and the MFC 177 are inserted into a pipe section 69.
- the MFC 177 is inserted on the downstream side of the air valve 148.
- the air valve 126 and the MFC1 76 are inserted into the piping section 68.
- the MFC 176 is inserted on the downstream side of the air valve 126.
- the air valve 147 and the MFC 183 are inserted into the piping part 82.
- the MFC 183 is inserted downstream of the air valve 147.
- the air valves 149 and 150 and the MFC 184 are inserted into the piping section 88.
- the MFC 184 is inserted between the air valves 149 and 150.
- the nozzle 45, the piping part 109, the valve 160, the piping part 93, the valve 125, the piping part 66, the MFC175, and the piping part 61 are the "first processing gas of the present invention” This corresponds to the “first gas supply section that supplies the upstream side of the gas flow outside the area where the substrate is disposed”.
- Piping section 61 corresponds to the “second gas supply unit that supplies the first processing gas to an intermediate portion of the gas flow in the region where the plurality of substrates are arranged” of the present invention.
- Nos, Nore 46-49, Selfie pipe part 94-97, Selfie pipe part 76-79, Noku Norebu 142-145, MFC 17 8 ⁇ : 181, Norebu 137-140, Piping part 75 This corresponds to the “fourth gas supply unit that supplies the second processing gas to an intermediate portion of the gas flow in the region where the plurality of substrates are arranged” of the present invention.
- the exhaust system 33 corresponds to the “exhaust section” of the present invention.
- the product wafer / monitor wafer arrangement region R corresponds to the “region where a plurality of substrates are arranged” of the present invention.
- a method of forming a thin film on the wafer 200 by the CVD method will be described as one step of the semiconductor device manufacturing process.
- This method is performed by a substrate processing apparatus having the processing furnace 202 described above.
- the operation of each part constituting the substrate processing apparatus is controlled by the controller 240.
- a plurality of wafers 200 are loaded (wafer charge) into a boat 217 being carried out by the internal force of the process tube 203.
- a plurality of, for example, 100, wafers 200 having a diameter of 300 mm on which thin films are to be formed are accommodated in the boat 217.
- the boat 217 holding the plurality of wafers 200 is lifted by the boat elevator 115 and carried into the processing chamber 201 (boat loading) as shown in FIG. (Step of carrying the substrate into the processing chamber).
- the seal cap 219 is in a state where the lower end of the manifold 209 is sealed via the O ring 220b.
- the processing chamber 201 is evacuated by the evacuation device 246 so that the inside of the processing chamber 201 has a desired pressure (degree of vacuum). As a result, the atmosphere in the processing chamber 201 is exhausted through the exhaust system 231. At this time, the pressure in the processing chamber 201 is measured by the pressure sensor 245. Based on the measured pressure, the opening degree of the main valve 242 is feedback controlled. Further, the inside of the processing chamber 201 is heated by the heater 206 so as to have a desired temperature. The power supply to the heater 206 is based on the temperature information detected by the temperature sensor 263. Based on the information, feedback control is performed so that the inside of the processing chamber 201 has a desired temperature distribution.
- the state of energization of the heater 206 is determined by the fact that the main surface temperature of the plurality of wafers 200 carried into the processing chamber 201 is thermally decomposed at least for both the first processing gas and the second processing gas.
- the main surface temperature between the plurality of wafers 200 is controlled to be substantially uniform over the entire region where the plurality of wafers 200 are arranged.
- the boat 217 is rotated by the rotation mechanism 254, whereby the wafer 200 is rotated.
- a film forming process is performed. That is, a gas supplied from a processing gas supply source and controlled to have a desired flow rate by the MFC 241 is introduced into the processing chamber 201 from the nozzle 230 through the gas supply system 232. The introduced gas rises in the processing chamber 201, flows out from the upper end opening of the inner tube 204 into the cylindrical space 250, and is exhausted from the exhaust system 231. When the processing gas passes through the processing chamber 201, it contacts the surface of the wafer 200. At this time, a thin film is deposited on the surface of the wafer 200 by a thermal CVD reaction. Details of the film forming process will be described later.
- the after purge process is executed. That is, the inert gas is supplied into the processing chamber 201 from the gas output port (tip portion) of the gas supply system 232. At this time, the evacuation processing is executed by the evacuation device 246. As a result, the atmosphere in the processing chamber 201 is purified by the inert gas.
- the atmosphere returning process is executed. That is, the evacuation process is stopped and only the inert gas supply process is executed. As a result, the pressure in the processing chamber 201 is returned to normal pressure.
- a boat unload process is executed. That is, the seal cap 219 is lowered by the boat elevator 115, the lower end of the manifold 209 is opened, and the wafer 200 that has been subjected to the film forming process is held by the boat 217. Is unloaded from the lower end of the process tube 203 (boat unloading) (step of unloading the substrate from the processing chamber). Thereafter, the wafer 200 that has been subjected to the film formation process is collected from the boat 217 (wafer discharge), and the first batch process is completed. Thereafter, similarly, the above-described processing is performed on the next plurality of wafers 200 in the second batch and thereafter. [0056] (2) Operation when cleaning the inner wall and the like of the process tube 203
- the cleaning gas is supplied into the processing chamber 201 from the gas output port (tip portion) of the nozzle 51.
- the reaction product deposited on the inner walls of the process tube 203 and the outer walls of the nozzles 41 to 51 is etched.
- vacuum exhaust processing is executed by the vacuum exhaust device 246.
- the etched reaction product is discharged out of the processing chamber 201 via the exhaust system 231.
- this cleaning process is performed simultaneously with the tallying process for the inner wall of the process tube 203.
- the cleaning gas is supplied from the piping portions 83 to 87 to the gas input ports (base end portions) of the nozzles 41 to 45 for film formation.
- the reaction product deposited on the inner walls of the nozzles 41 to 45 is etched by the cleaning gas.
- the evacuation processing is executed by the evacuation device 246.
- the etched reaction product is output (discharged) into the processing chamber 201 from the gas output ports (tip portions) of the nozzles 41 to 45.
- the reaction product output (discharged) into the processing chamber 201 is discharged out of the processing chamber 201 through the exhaust system 231.
- this cleaning process is performed one by one by, for example, selecting five nozzles 41 to 45 one by one in accordance with a predetermined order.
- the inert gas is supplied from four of the piping portions 70 to 74 to the four nozzles that are not selected. At this time, the inert gas is supplied to the five nozzles 46 to 50 from the piping parts 94 to 98. This prevents nozzle over-etching.
- the cleaning gas usually remains inside the nozzle after the cleaning process is completed. Therefore, if this is left as it is, the entire inner wall of the nozzle is over-etched.
- an inert gas is supplied to the nozzle after the cleaning process. As a result, the tiling gas remaining inside the nozzle is expelled. As a result, over-etching due to remaining cleaning gas is prevented.
- the cleaning process of the inner walls of the nozzles 41 to 45 is performed simultaneously with the cleaning process of the inner walls of the process tube 203.
- the inert gas is supplied to the rezzles that have undergone the nozzle or cleaning process after the tallying process. This prevents the cleaning gas from entering these nozzles. As a result, over-etching due to the penetration of the cleaning gas is prevented.
- the film forming process includes supplying the first processing gas to the upstream side of the gas flow, supplying the first processing gas to the middle of the gas flow, and upstream to the second processing gas. Supply of the second process gas to the middle portion of the gas flow, and a step of forming a thin film. Below, each process is demonstrated.
- the controller 240 opens the Xenoreb 121-125, 137-: 146, 156-160 force S, and closes the other Xenore 126-136, 147-: 155 ⁇ .
- the first processing gas (DCS gas) is supplied to the noses 41 and 45 through the self-tube sections 61 to 66, 89 to 93, and 105 to 109.
- the nozzle 45 force and the like are upstream of the area (product wafer Z monitor wafer arrangement area R) where the plurality of wafers 200 loaded into the first processing gas force processing chamber 201 are arranged.
- the Nos. 41 to 44 force, etc. supply the first processing gas to the midpoint of the gas flow in the region (product wafer Z monitor wafer placement region R) where a plurality of wafers 200 are placed.
- the controller 240 designates a target value of the flow rate per unit time of the first processing gas supplied to the nozzles 41 to 45. Accordingly, the flow rate per unit time of the first processing gas supplied to the nozzles 41 to 45 is controlled by MFC17 :! to 175. As a result, the flow rate per unit time of the first processing gas supplied to the nozzles 41 to 45 is set to the target value.
- the first processing gas (DCS gas) is supplied to NOZONORE 4 :! to 45, and at the same time, the second NO46 to 50 to 50 Process gas (NH gas) is supplied
- the Nos. 46-49 force and the like supply the second processing gas to an intermediate portion of the gas flow in the region (product wafer / monitor wafer placement region R) where the plurality of wafers 200 are placed.
- the controller 240 designates a target value of the flow rate per unit time of the second processing gas supplied to the nozzles 46 to 50. Accordingly, the flow rate per unit time of the second processing gas supplied to the nozzles 46 to 50 is controlled by the MFCs 178 to 182. As a result, the flow rate per unit time of the second processing gas supplied to the nozzles 46 to 50 is set to the target value.
- the first processing gas DCS gas
- the second processing gas NH gas
- the force processing chamber 201 are simultaneously supplied to cause thermal decomposition and the like. 1, processing gas
- Elemental (N) chemically reacts to form an amorphous material (Si N), and Si N ( (Silicon nitride) film is formed (step of forming a thin film).
- the reaction formula at this time is as follows.
- the first processing gas supplied from the nozzle 45 and the second processing gas supplied from the nozzle 50 are combined with one element contained in the first processing gas.
- a chemical reaction with one element contained in the second process gas forms an amorphous substance, mainly from the upstream side of the gas flow (below the inside of the processing chamber 201): from the! Th to 25th sheets
- a thin film is formed on the wafer 200.
- the first processing gas supplied from the nozzle 43 and the second processing gas supplied from the nozzle 48 are thermally decomposed, and are contained in one element contained in the first processing gas and the second processing gas. It reacts with one element to form a non-crystal, and mainly forms a thin film on the wafers 200 to 50.
- Nozunore 42 and Nozunore 47 force the 51st to 75th sheets, Nos, Nole 41 and Nosu, Nore 46, etc. Let it form.
- the temperature of the main surface of the wafer 200 is pyrolyzed together with the first processing gas and the second processing gas. It is preferable to raise the temperature. That is, it is preferable that the inside of the processing chamber 201 is heated and maintained at a temperature selected from the range of 600 ° C. to 800 ° C. so as to be substantially uniform over the entire region where the wafer 200 is disposed. . For example, a large amount of DCS gas is consumed when the temperature of the main surface of the wafer 200 is approximately 760 ° C.
- the reaction temperature between the first processing gas and the second processing gas changes, the composition ratio of the silicon (Si) element and the nitrogen (N) element in the silicon nitride film to be formed changes. In other words, there is a characteristic.
- the composition ratio of silicon element and nitrogen element changes, the dielectric constant of the silicon nitride film changes. Therefore, in order to keep the film quality of the silicon nitride film uniform between the wafers 200, the main surface temperature of each wafer 200 is realized over the entire area where the plurality of wafers 200 are arranged (product wafer Z monitor wafer arrangement area R).
- the composition ratio of silicon element and nitrogen element in the silicon nitride film, and the oxide film In order to keep the composition ratio of silicon element and oxygen element uniform among the plurality of wafers 200, the ratio between the supply flow rate of the first process gas and the supply flow rate of the second process gas is set to a plurality of wafers 200. Over the entire area where product is placed (product wafer / monitor wafer placement area R)
- the ratio of the flow rate of the gas supply flow in the supply of the first process gas to the midpoint of the gas flow of the first process gas with respect to the gas supply flow rate in the upstream supply of the gas flow of the first process gas, and the second The flow rate ratio of the gas supply flow rate in the supply to the midpoint of the gas flow of the second process gas with respect to the gas supply flow rate in the upstream supply of the process gas flow should be substantially the same. Is preferred.
- the silicon nitride films are collectively formed on the plurality of wafers 200 as described above, a uniform silicon nitride film is formed between the wafers 200 and within the plane of the wafer 200 when the film stress is small.
- the NH gas supply flow rate is 3% of the DCS gas supply flow rate.
- the inert gas is supplied to the nozzles 46-50. in this case
- the inert gas is supplied to the nozzles 46 to 50, and at the same time, the piping parts 69, 70 to 74, 89
- the inert gas is supplied to Nosole 41 to 45 through -93 and 105-109.
- the MFC 177 controls the inert gas supplied to the nozzles 41 to 45 based on an instruction from the flow force controller 240 per unit time.
- the vacuum evacuation process is executed by the vacuum evacuation device 246.
- the residual gas force remaining in the gas supply system 232, the processing chamber 201, and the exhaust system 231 is removed out of the exhaust system 231.
- the temperature of the region facing the heater 206 on the outer wall of the inner wall 41-44, 46-49 of the process tube 203 is raised to the deposition temperature of Si N.
- a Si N film as a reaction product is deposited on a region facing the heater 206 in the outer walls of the inner walls 41 to 44 and 46 to 49 of the inner wall of the process tube 203.
- reaction product is peeled off and becomes particles when the amount of deposition increases. Therefore, the reaction product is peeled off and becomes particles when the amount of deposition increases. Therefore, the reaction product is peeled off and becomes particles when the amount of deposition increases. Therefore, the reaction product is peeled off and becomes particles when the amount of deposition increases. Therefore, the reaction product is peeled off and becomes particles when the amount of deposition increases. Therefore, the reaction product is peeled off and becomes particles when the amount of deposition increases. Therefore
- the temperature of the region facing the heater 206 on the inner walls of the nozzles 41 to 44 and 46 to 49 also rises to the film formation temperature.
- the inner wall of the nozzles 41 to 44 that supply DCS gas causes a thermal decomposition reaction mainly at a temperature of 500 ° C or higher, and deposits Poly-Si as a reaction product.
- NH gas and N gas formed by thermal decomposition of NH gas although less than the amount of Polv-Si deposited due to the thermal decomposition reaction of DCS gas, are present.
- the reaction product is peeled off and becomes particles when the amount of deposition increases. Therefore, the inner walls of the nozzles 41 to 44 need to be tarnished in the same manner as the inner wall of the process tube 203 and the like.
- ammonium chloride is used as a reaction product.
- the film forming nozzle 45 is provided below a region facing the heater 206. Therefore, the reaction product is hardly deposited on the inner wall of the nozzle 45, so that the temperature inside the nozzle 45 does not rise to the film forming temperature.
- the ammonium chloride also flows into the nozzle 45. When ammonium chloride reaches a low temperature of less than about 150 ° C., it adheres to the inner wall of Noznore 45 and solidifies. Solidified ammonium chloride generates particles by clogging Noznore 45 and so forth, or once adhering and then scattering. Therefore, it is better to clean the inner wall of Noznore 45.
- the air valves 137 to 146 are closed by the controller 240. This prohibits the supply of the first processing gas to the nozzles 46-50. Also, in this case, the eavernore 126, 127-131 is opened. As a result, the inert gas is supplied to the nozzles 46 to 50 through the self-tube sections 94 to 98. In this case, the flow rate per unit time of the inert gas supplied to the nozzles 46 to 50 is controlled by the MFC 176 based on an instruction from the controller 240.
- the air valves 149 and 150 are opened.
- the cleaning gas is supplied to the nozzle 51 via the piping parts 81 and 88.
- the flow rate per unit time of the tarizing gas supplied to the nozzle 51 is controlled by the MFC 184 based on an instruction from the controller 240.
- the Aero Knole 121-: 125 force S is closed, and the Aero Knole 132-: 136, 148, 156-160 force S is opened.
- the supply of the second processing gas to the nozzles 41 to 45 is prohibited, and the inert gas can be supplied.
- which nozzle 41 to 45 is supplied with the inert gas is determined depending on which nozzle 41 to 45 is cleaned.
- the air valve 147, 151 to 155 force S opening force can be obtained.
- the cleaning gas can be supplied to the nozzles 41 to 45.
- which Nozzle 41 to 45 is supplied with the cleaning gas is determined by which Nozzle 41 to 45 is cleaned.
- the air valve 151 is opened and the air valves 152 to 155 are closed.
- air valve 157-1 60 is opened and the air valve 156 is closed.
- the cleaning gas is supplied to the gas input port (base end portion) of the nozzle 41 and the inert gas is supplied to the gas input ports of the nozzles 42 to 45.
- the inner wall of the nozzle 41 is cleaned, and overetching of the inner walls of the nozzles 42 to 45 is prevented.
- the inner wall of the nozzle 44 is cleaned, and over-etching of the inner walls of the nozzles 41 to 43, 45 is prevented. Further, the inner wall of the nozzle 45 is cleaned, and over-etching of the inner walls of the nozzles 41 to 44 is prevented.
- the flow rate per unit time of the tiling gas supplied to the nozzles 41 to 45 is controlled by the MFC 183 based on the instruction from the controller 240.
- the flow rate per unit time of the inert gas supplied to Nozzle 4 :! to 45 is controlled by the MFC 177 based on instructions from the controller 240.
- the flow rate per unit time of the cleaning gas supplied to the nozzles 41 to 45 is determined based on the length of the portion where the reaction product is deposited, for example. This is in order to make the cleaning times for Nozzles 41-45 the same. As a result, the flow rate per unit time of the cleaning gas supplied to the nozzles 41 to 45 is the largest at the nozzle 41. Nozure 42 is the second largest, Nozure 43 is the third largest, Nos' Nore 44 is the fourth largest, and Nozure 45 is the smallest.
- reaction product deposited on the inner wall of the process tube 203 and the outer wall of the nozzles 41 to 44 and 46 to 49, the reaction product deposited on the inner wall of Nozzle 4 :! to 44, and the heater 206 The types and thicknesses of reaction products deposited outside the facing region and on the inner wall of the nozzle 45 are different. Therefore, when cleaning these reaction products, it is preferable to optimize the cleaning conditions in accordance with the types and film thicknesses of the respective reaction products and efficiently clean them simultaneously.
- Inert gas is supplied to the nozzles 41 to 45 through 109.
- the MFC 177 controls the inert gas supplied to the nozzles 41 to 45 based on an instruction from the flow force controller 240 per unit time.
- the evacuation processing is executed by the evacuation device 246.
- the residual gas force remaining in the gas supply system 232, the processing chamber 201, and the exhaust system 231 is removed out of the exhaust system 231.
- the film thickness uniformity within the surface of the wafer 200 may deteriorate.
- the thickness of the thin film formed differs between the wafer 200 placed on the upstream side of the gas flow having a fast reaction rate and the wafer 200 placed on the downstream side of the gas flow having a slow reaction rate.
- FIG. 12B shows the film thickness uniformity between the wafers 200 may deteriorate.
- FIG. 12 (b) shows the film thickness distribution when a temperature gradient is not provided to a plurality of wafers in the method in which the processing gas is not supplied to the intermediate portion.
- the wafer 200 becomes larger in diameter or the pattern on the wafer surface becomes more dense, the problem becomes remarkable.
- the composition ratio of the formed thin film changes, and the film quality (for example, dielectric constant, stress value, etching rate) changes.
- the first processing gas (DCS gas) and the second processing gas (NH gas) are used by using the nozzles 41 to 44 and the nozzles 46 to 49. From the middle of the gas flow
- the supply amount of the processing gas on the upstream side of the gas flow can be reduced, and the pressure difference between the upstream side and the downstream side of the gas flow can be corrected (reduced).
- the uniformity of the film thickness and composition ratio between the wafers 200 is improved, and the uniformity of the film thickness and composition ratio within the wafer 200 surface is also improved.
- the processing gas supplied to the upstream side of the gas flow in the processing chamber 201 such as Nosnole 45, 50, mainly flows as it flows in the processing chamber 201 from the upstream side to the downstream side. It reacts on the main surface of the plurality of wafers 200 and is consumed. For this reason, if the processing gas is supplied only from the nozzles 45 and 50, the processing gas gradually becomes insufficient on the downstream side of the gas flow. As a result, the reaction rate becomes slower at the downstream side of the gas flow, and the film thickness of the formed thin film gradually becomes thin. For example, as shown in FIG. There is a case. In particular, when the diameter of the wafer 200 is further increased, or the pattern on the wafer surface is further densified, the amount of gas consumed increases and the problem becomes significant.
- the first processing gas (DCS gas) and the second processing gas are used.
- the processing gas supplied from Nos, No. 41 to 50, and the like is supplied to a predetermined region by the MFC 171 to 175 and 178 to 182 while the gas flow rate is controlled independently. Therefore, the difference in supply amount of the wafers 200 in the stacking direction can be further reduced, the film thickness between the wafers 200 becomes more uniform, and the uniformity within the wafer 200 surface is further improved.
- the loading effect means that when processing a wafer 200 having a high pattern density (that is, having many concaves and convexes and a large surface area), the processing gas is consumed by the reaction with the upstream wafer 200. Since it is easy, the film thickness tends to be different between the wafer on the upstream side and the wafer on the downstream side (the downstream side becomes thinner), and the uniformity between the wafers 200 is deteriorated.
- the reaction temperature between the first process gas and the second process gas changes.
- the composition ratio of silicon (Si) and nitrogen (N) elements in the formed silicon nitride film and the composition ratio of silicon (Si) and oxygen (O) elements in the oxide film change.
- the dielectric constant of the silicon nitride film or the oxide film changes.
- the temperature in the processing chamber 201 gradually increases from the upstream side of the gas flow (below the processing chamber) to the downstream side of the gas flow (above the processing chamber).
- FIG. 12 (a) shows the film thickness distribution when a temperature gradient is provided to a plurality of wafers in the method in which the processing gas is not supplied to the intermediate portion.
- a thin film can be formed without providing a temperature gradient in the processing furnace 202. Therefore, it is possible to form a thin film having a uniform film thickness and a uniform film quality such as dielectric constant.
- a metal member such as a manifold.
- Ammonium chloride such as DCS gas
- the C1-based gas is supplied midway even in the middle of the gas flow in the wafer placement area, the amount of gas supply in the wafer placement area can be reduced, and the amount of salt ammonia can be reduced. The amount of formation on the upstream side can be suppressed, and it is possible to suppress metal contamination.
- the inner wall of the process tube 203 is connected to 41 to 44, 4 Of the outer walls of 6 to 49, the Si N film deposited in the area facing the heater 206 is the nozzle 51
- the inert gas is supplied to the nozzles to which no cleaning gas is supplied. As a result, overetching of the nozzles 41 to 45 can be prevented.
- the flow rate per unit time of the cleaning gas supplied to the nozzles 41 to 45 is, for example, the length of the portion where the reaction product is deposited. Determined based on As a result, the same cleaning time for the inner walls of Nozu Nore 41 to 45 can be achieved. As a result, it is possible to select and clean multiple Nozzles 4 :! to 45 at the same time by simply selecting Nozzles 41-45 one at a time and cleaning them. Can be shortened.
- the first processing gas a gas capable of depositing a film alone is used. Therefore, DCS gas causes a thermal decomposition reaction and deposits a Poly-Si film on the inner walls of Nos 4: 4 to 44 supplying the first processing gas (DCS gas).
- the second processing gas NH gas
- NH gas like DCS gas, is part of the gas.
- the cleaning gas (NF) is supplied to the piping parts 94 to 98 for supplying NH gas.
- FIG. 2 is a diagram showing the configuration of the gas supply system of the processing furnace in the second embodiment of the present invention.
- the basic components are the same as those corresponding to the first embodiment described with reference to FIG.
- the configuration of the second embodiment is different from that of the first embodiment in that a self-administration tube: 115, / rev 161-166, 167-: 171 and MFC185 are added.
- downstream end of the piping part 81 is connected to the upstream end of the piping part 110.
- the downstream end of the piping part 110 is connected to the upstream end of the piping parts 111 to 115.
- the downstream ends of the piping portions 111 to 115 are connected to the upstream ends of the piping portions 94 to 98, respectively.
- the air valve 161 and the MFC 185 are inserted into the piping section 110.
- the MFC 185 is inserted downstream of the air valve 161.
- the air valves 162 to 166 are inserted into the piping sections 111 to 115, respectively.
- the air valves 167 to 171 are respectively inserted into the downstream piping portions 94 to 98 from the connecting portion between the downstream end of the piping portion 99 to 103 and the upstream end of the piping portion 94 to 98, respectively. ing.
- the air banolebu 162 to 166 and the air banolebu 167 to 171 are the cleaning gas flowing in the self-pipe section 111-115 or the gas flowing in the pipe sections 77-80, 79-103 (processing gas or inert gas). ) Is selectively supplied into the nozzles 46-50.
- the air valve 137 to 146 is closed by the controller 240, and the air valve 127 to 131, 167 to 171 force S opening force is generated.
- the supply of the second processing gas (NH gas) to the nozzles 46 to 50 is prohibited, and the inert gas can be supplied.
- the air vanolev 161 to 166 force S is opened.
- the cleaning gas can be supplied to the nozzles 46 to 50.
- which nozzle 46-50 is supplied with the tarizing gas is determined by which nozzle 46-50 is to be cleaned.
- the inner wall of the nozzle 46 is to be cleaned.
- the air valve 162 is opened and the air valves 163 to 166 are closed.
- the air valves 128 to 131 and 168 to 171 are opened, and the air valves 127 and 167 are closed.
- the cleaning gas is supplied to the gas input port (base end portion) of the nozzle 46, and the inert gas is supplied to the gas input ports of the nozzles 47 to 50.
- the inner wall of the nozzle 46 is cleaned, and overetching of the inner walls of the nozzles 47 to 50 is prevented.
- the air valve 163 force S is opened and the air valves 162 and 164 to 166 force S are closed. Further, in this case, the air valve 127, 129 to 131, 167, 169 to 171 force S is opened, and the air / noreb 128, 168 force S is closed. Thereby, in this case, the cleaning gas is supplied to the gas input port of the nozzle 47, and the inert gas is supplied to the gas input ports of the nozzles 46 and 48 to 50.
- the inner walls of the nozzles 49 are cleaned in the same manner, and overetching of the inner walls of the nozzles 46 to 48, 50 is prevented. Further, the inner wall of the nozzles 50 is cleaned, and overetching of the inner walls of the nozzles 46 to 49 is prevented.
- the flow rate per unit time of the tiling gas supplied to the nozzles 46 to 50 is controlled by the MFC 185 based on the instruction of the controller 240.
- the flow rate per unit time of the inert gas supplied to the nozzles 46 to 50 is controlled by the MFC 185 based on an instruction from the controller 240.
- the flow rate per unit time of the cleaning gas supplied to the nozzles 46 to 50 is determined based on, for example, the length of the portion where the reaction product is deposited. This is in order to make the cleaning time of Nozure 46-50 the same.
- the flow rate per unit time of the cleaning gas supplied to the nozzles 46 to 50 is the second largest at Nozzle 47, the largest at Nozzle 46, the third largest at Nozzle 48, and the Nos' 49 At 4th t, it is the smallest, and at 50, the smallest.
- the inert gas is supplied to the five nozzles 4:! To 45 from the pipe parts 105 to 109, respectively.
- ERA Aeronore 126, 150, 148, 132-136, 156-160 Open, other Aeronore 121-125, 127-131, 137-147, 149, 151- It is closed to 155f.
- the inert gas is supplied to the nozzle 51 through the piping parts 67, 68, 88.
- the flow rate force per unit time of the inert gas supplied to the nozzle 51 is controlled by the MFC 176 based on the instruction of the controller 240.
- the MFC 176 controls the inert gas supplied to the nozzles 46 to 50 based on instructions from the flow force controller 240 per unit time.
- the evacuation processing is executed by the evacuation device 246.
- the residual gas force remaining in the gas supply system 232, the processing chamber 201, and the exhaust system 231 is removed out of the exhaust system 231.
- the second embodiment described in detail has one or more of the following effects.
- the Si N film deposited in the region facing the heater 206 on the outer wall of the inner wall 41 to 44, 46 to 49 of the inner wall of the process tube 203 is separated from the inner surface of the inner tube 51.
- a cleaning process is performed by supplying one Jung gas.
- the cleaning process of 3 4 is performed by supplying cleaning gas to the entire inner wall of Nozure 46-50.
- the entire inner wall of 46-50 can be cleaned.
- the inert gas is supplied to the nozzles to which the cleaning gas is not supplied. As a result, overetching of Nos. 46-50 can be prevented.
- the flow rate per unit time of the cleaning gas supplied to the nozzles 46 to 50 is, for example, the length of the portion where the reaction product is deposited. Determined based on As a result, the same cleaning time for the inner walls of Nozu Nore 46-50 can be achieved. As a result, it is possible to select and clean a plurality of nozzles 46 to 50 at the same time by simply selecting and cleaning the nozzles 46 to 50 one by one, and the cleaning time can be shortened.
- the second processing gas is not supplied to the intermediate location. That is, in the present embodiment, there is no supply of the second process gas to the middle part of the gas flow, the second process gas force is supplied only to the upstream side outside the wafer arrangement region R, and a plurality of sheets are supplied.
- the middle of the gas flow in the area where the wafer 200 is placed product wafer / monitor wafer placement area R
- the first processing gas supplied from the nozzle 45 and the second processing gas supplied from the nozzle 50 are thermally decomposed to produce the first One element contained in the processing gas and one element contained in the second processing gas chemically react to form an amorphous material, mainly from the upstream side of the gas flow (below the inside of the processing chamber 201), A thin film is formed on the first to 25th wafers 200.
- the first processing gas supplied from the nozzle 43 and the remaining second processing gas supplied from the nozzle 50 are thermally decomposed, so that one element contained in the first processing gas and the second processing gas are contained.
- One element contained in the gas chemically reacts to form an amorphous body, and a thin film is formed mainly on the 26th to 50th wafers 200. Similarly, a thin film is formed on the first to 75th wafers 200 by the supply of the first processing gas from the nozzle 42 and the remaining second processing gas supplied from the nozzle 50, and the Of the first process gas from 41 A thin film is formed on the 76th to 100th wafers by the supply and the remaining second processing gas supplied from the nozzle 50.
- FIG. 13 is a graph showing the film thickness distribution between thin film wafers formed by the method of supplying process gas to an intermediate location, and (a) shows the supply of DCS gas and NH gas to an intermediate location.
- the ⁇ and ⁇ marks indicate the film thickness distribution when only DCS gas is supplied to the middle part. According to FIG. 13 (a), even when only the DCS gas is supplied to the midpoint, the film thickness between the wafers 200 becomes uniform as in the case of supplying the DCS gas and NH gas to the midpoint.
- Fig. 14 shows the distribution of the refractive index of the thin film between wafers when the thin film is formed by a method in which the processing gas is not supplied to the intermediate position (when conventional technology is used), and the processing gas is supplied at the intermediate position.
- the distribution of the refractive index of the thin film between the wafers when the thin film is formed by the supply method is shown.
- the mouth mark indicates the case where the conventional technology is used
- the thumb mark indicates the case where only the first processing gas (DCS gas) is supplied on the way using a multi-system nozzle
- the ⁇ mark indicates the first case.
- the difference in the refractive index between the wafers 200 becomes even smaller when the glass is supplied in the middle ( ⁇ mark). If the refractive index is not uniform, it can be said that the composition ratio is not uniform.
- the second process gas is supplied to the upstream side of the gas flow.
- the supply flow rate of the second process gas in the first process gas to the upstream of the gas flow of the first process gas and the flow rate of the first process gas to the middle of the gas flow of the first process gas It is preferable that the flow rate be larger than the total flow rate with the supply flow rate of the first processing gas.
- the first processing gas DCS gas
- the first processing gas can deposit a poly-Si film by itself. For this reason, unless a state in which a sufficient amount of the second processing gas exists in the region where the first processing gas is supplied (a so-called NH gas-rich state) is not generated, the main surface of the woofer 200 is not formed.
- the supply flow rate is increased at a midway location downstream from the upstream side. This makes it possible to correct (reduce) the pressure difference between the upstream and downstream sides of the gas flow.
- the processing furnace 202 which is effective in the present embodiment, as shown in FIG. 6, only the nozzle that supplies the first processing gas (DCS gas) is a multi-system nozzle, and the supply location of the first processing gas is changed. Further increase. That is, in the present embodiment, the second processing gas (NH gas) is used as a route.
- DCS gas first processing gas
- NH gas second processing gas
- Nozzles 46 to 49 are not used as nozzles to be supplied to the middle part, and only nozzle 50 is used, and Nosole 41 to 45 and 46a to 49a are used as the nozzles for supplying the first processing gas into the processing chamber 201. However, this is different from the first embodiment.
- Other configurations are the same as those of the processing furnace 202 according to the first embodiment.
- the tip portions of the nozzles 41 to 44 and 46a to 49a are positioned in the middle of the gas flow in the region where the plurality of wafers 200 carried into the processing chamber 201 are arranged.
- the tip of each of Nozzles 4 :! to 44 is a plurality of different positions (heights) provided along the gas flow in the region where the plurality of wafers 200 are arranged.
- Each is positioned in the middle.
- the tip portions of the nozzles 46a to 49a and 41 to 44 are, for example, 100 wafers existing in the product wafer / monitor wafer arrangement region R.
- the first process gas has a larger number of ways.
- the second process gas is not supplied to the middle point. That is, in the present embodiment, the first processing gas is supplied to eight intermediate locations in the supply of the first processing gas to the intermediate locations of the gas flow. In addition, the second processing gas is not supplied to an intermediate portion of the gas flow, and the second processing gas is supplied only to the upstream side outside the wafer arrangement region R, so that a plurality of wafers 200 are formed.
- the gas flow in the area to be placed (product wafer Z monitor wafer placement area R) is not supplied. Other operations are substantially the same as those of the film forming process according to the third embodiment.
- the film thickness between the wafers 200 can be made more uniform by further increasing the supply points of the first processing gas.
- Figure 13 is a graph showing the film thickness distribution between thin film wafers formed by the method of supplying process gas to an intermediate location, and (b) shows the film thickness when the number of DCS gas supply locations is further increased. The distribution is shown.
- the nozzles 46 to 49 that supply gas) to the middle are raised slightly lower (shorter) than the nozzles 41 to 44 that supply the first processing gas (DCS gas) to the middle. Power Different from the first embodiment.
- the nozzles 41 to 44 that supply the first processing gas (DCS gas) to the midpoints interrupt the second processing gas (NH gas).
- the second processing gas supplied to the midpoint of the gas flow of the first processing gas is the second processing gas.
- the film processing is different from the first processing gas supplied in the middle of the gas flow in that the gas is supplied from the upstream side of the gas flow. .
- Other operations are the same as those in the first embodiment.
- the second processing gas (NH gas), the first processing gas (DCS gas)
- the second processing gas (NH gas) is supplied to a midpoint.
- Nozure 46-49 force Each of them is slightly lower than Nozure 41-44, which supplies the first processing gas (DCS gas) to the middle part (upstream side of the gas flow).
- DCS gas first processing gas
- the reaction between the first processing gas and the second processing gas is suppressed, and the generation of particles in the processing chamber 201 can be suppressed.
- a first gas supply nozzle for supplying the first processing gas into the processing chamber 201 and a second processing gas in the processing chamber 201 are provided.
- the second gas supply nozzles to be supplied to the nozzles are arranged so that the nozzles having substantially the same length are adjacent to each other. More preferably, they are alternately arranged so as to be adjacent to each other.
- nozzles of Nozunore 41-44 and Nozunore 46-49 are the same height (Nozunore 41 and 46, Nozunore 42 and 47, Nozunore 43 and 48, Nozunore 44 and 49). I'm in JI.
- FIG. 8 is a configuration diagram showing the configuration of the gas supply nozzle of the processing furnace constituting a part of the substrate processing apparatus of the sixth embodiment, (a) is a plan sectional view of the processing furnace, (B) is a schematic diagram showing the arrangement of gas supply nozzles in the processing furnace.
- the gas supply port of the first gas supply nozzle and the gas supply port of the second gas supply nozzle are adjacent to each other, the mixing of the gas flows can be promoted. And the reaction between the first process gas and the second process gas can be promoted.
- the first gas supply nozzle and the second gas supply nozzle are adjacent to each other with nozzles having substantially the same length. It is arranged like this. More preferably, they are alternately arranged so as to be adjacent to each other.
- the gas supply port of the first gas supply nozzle is configured to supply the first processing gas (DCS gas) in the horizontal direction toward the center of the wafer 200, and the second gas supply nozzle The gas supply port is configured to supply a second processing gas (NH gas) toward the center of the wafer 200 and toward the gas flow of the first processing gas.
- Figure 9 shows the seventh embodiment.
- FIG. 2 is a configuration diagram showing a configuration of a gas supply nozzle of a processing furnace that constitutes a part of the substrate processing apparatus of the state, (a) is a plan sectional view of the processing furnace, and (b) is a gas supply nozzle in the processing furnace It is the schematic which shows the arrangement
- the gas supply port of the first gas supply nozzle and the gas supply port of the second gas supply nozzle are adjacent to each other, and in addition, the gas of the first process gas Since the second process gas is supplied toward the stream, the mixing of the gas stream can be further promoted, and the reaction between the first process gas and the second process gas can be further promoted.
- the first gas supply nozzle and the second gas supply nozzle are arranged so that nozzles having substantially the same length are adjacent to each other. 1J. More preferably, they are alternately arranged 1J so as to be adjacent to each other. Further, the second gas supply nozzle is configured to be shorter than the first gas supply nozzle. In addition, NH gas is supplied vertically from the gas supply port of the second gas supply nozzle.
- FIG. 10 is a configuration diagram showing the configuration of the gas supply nozzle of the processing furnace constituting a part of the substrate processing apparatus of the eighth embodiment, and (a) is a plan sectional view of the processing furnace, (B) is a schematic diagram showing an arrangement IJ of gas supply nozzles in the processing furnace.
- the gas supply port of the first gas supply nozzle and the gas supply port of the second gas supply nozzle are adjacent to each other, and in addition, the second process gas (NH Gas)
- the first processing gas (DCS gas)
- the mixing of the gas flow can be further promoted, and the reaction between the first processing gas and the second processing gas can be further promoted. it can.
- the first gas supply nozzle is not configured as a multi-system nozzle, and a plurality of nozzles are provided at different positions in the vertical direction (substrate arrangement direction). This is different from the first embodiment in that it is configured as a single perforated nozzle 41 ′ provided with a gas supply port.
- the porous nozzle 41 ' is set up (extended) in the vertical direction (substrate arrangement direction) inside the processing chamber 201.
- the base end portion of the porous nozzle 41 ′ is positioned outside the sidewall of the manifold 209 through a nozzle hole formed in the sidewall of the manifold 209.
- a plurality of gas supply ports are provided in the wafer arrangement region R, respectively, at a plurality of halfway positions provided along the gas flow and having different positions.
- the gas supply amounts from a plurality of gas supply ports provided in the porous nozzle 41 are preferably set to be uniform among the gas supply ports. For example, by providing the gas supply port so that the diameter of the gas supply port becomes larger toward the downstream side of the gas flow (upward in the processing chamber 201), the gas supply amount is made uniform between the gas supply ports. Is possible.
- the same effect as that of the first embodiment can be obtained.
- the first gas supply nozzle is not configured as a multi-system nozzle (multiple nozzles)
- a mass flow controller or a unit is provided for each of a plurality of nozzles constituting the multi-system nozzle. Since it is not necessary to prepare a plurality of supply pipes, the manufacturing cost of the substrate processing apparatus can be reduced.
- the present invention is not limited to the above-described embodiment.
- the first gas supply nozzle may be configured as a multi-system nozzle
- the second gas supply nozzle may be configured as a porous nozzle.
- both the first gas supply nozzle and the second gas supply nozzle may be configured as perforated nozzles.
- a plurality of porous nozzles may be provided for each type of processing gas.
- only a part of the gas supply nozzles may be integrated as a porous nozzle nozzle.
- the positions of a plurality of gas supply ports provided for each porous nozzle provided for each gas type of the processing gas are the same as the gas output ports of the first, second, and fifth to seventh embodiments described above.
- a gas supply port having substantially the same hole diameter may be arranged at substantially the same height of each of the plurality of multi-hole nozzles, The same effect can be obtained by arranging the gas supply port slightly upstream. It is also preferable to close the tip of the multi-hole nozzle and provide multiple gas supply ports on the side wall. As a result, the amount of gas supplied from each gas supply port tends to be uniform.
- the DCS gas is used as the first processing gas.
- the embodiment of the present invention is not limited to the above-described embodiment. That is, as the first processing gas, for example, a C1 gas such as TCS (Tetrachlorosilane) gas, HCD (Hexachlorodisilane) gas, BTBAS (Bistally butylaminosilane; Bis (Tertiary- Si-based gas such as butylamino) Silane) gas can be used.
- TCS Tetrachlorosilane
- HCD Hexachlorodisilane
- BTBAS Bath butylaminosilane
- Bis Tetiary- Si-based gas such as butylamino) Silane
- the formula is SiH [NH (C H)].
- reaction conditions when TCS gas, HCD gas, and BTBAS gas are used as the first processing gas are, for example, a gas supply amount of 20 to 400 cc and a main surface temperature of the wafer 200 of 500 to 700.
- the boat 217 holds 100 wafers 200 in multiple stages, and each of the second gas supply nozzle and the fourth gas supply nozzle is configured as four multi-system nozzles. It was.
- the present invention is not limited to the above-described form. That is, the number of wafers 200 held in the boat 217 may be increased or decreased, or the number of multi-system nozzles constituting the second gas supply nozzle or the fourth gas supply nozzle may be increased or decreased. Furthermore, the number of multi-system nozzles constituting the second gas supply nozzle or the fourth gas supply nozzle can be different from each other.
- 125 wafers 200 are held in a multi-stage in a boat 217 at a predetermined pitch (eg, 6.3 mm), and the number of multi-system nodules constituting the second gas supply nozzle or the fourth gas supply nozzle is determined. In the case of nine each, it is possible to reduce the variation in the thickness of the thin film formed between the wafers 200 to 1% or less of the film thickness at the maximum.
- the gas supply order in the present invention is not limited to the above-described embodiment.
- the steps may be performed in order according to a predetermined order rather than performing the steps simultaneously.
- the process gas is supplied simultaneously from a plurality of multi-system nozzles.
- the process gas may be supplied in a predetermined order (for example, from the upstream side of the gas flow).
- the start order or stop order of each process is set so that the processing gas supply time for the wafer 200 where the thin film to be formed becomes thin is longer than the processing gas supply time for the other wafers 200.
- the gas supply to the downstream side of the gas flow is started before the gas supply to the upstream side or stopped afterwards It is preferable to do.
- the supply of the first process gas to the middle part of the gas flow and the supply of the second process gas to the middle part of the gas flow are performed in the same way as the supply of the first process gas to the upstream side of the gas flow and It is preferable to start before or after stopping the supply of the second process gas stream upstream.
- the process gas supply time is set to be longer than the process gas supply time for the wafer 200 placed on the upstream side. The gas supply was started first or stopped later so that it would be longer It is preferable. Thereby, the uniformity of the film thickness between the wafers 200 can be improved.
- the thickness of the thin film formed on the wafer 200 placed on the downstream side of the gas flow is thinner than the thickness of the thin film formed on the wafer 200 placed on the upstream side.
- a gas that cannot be formed by itself, such as NH gas, is rich.
- the gas supply may be started in the order of supply of the gas flow of the processing gas to the upstream side, or the gas supply may be stopped in the reverse order to the above order.
- the NH gas is in a state of being in each region. The order of gas supply start so that
- An order or stop order may be determined. That is, supply to a plurality of midpoints having different positions provided along the gas flow of the first process gas, or a plurality of midpoints having different positions provided along the gas flow of the second process gas Also in the supply to the location, for example, Nozure 49 ⁇ Nozure 44 ⁇ Nozzle 48 ⁇ Nozzle 43 ⁇ Nozzle 47 ⁇ Nozzle 42 ⁇ Nozure 4 6 ⁇ Nozure 41 Alternatively, it is preferable to stop the supply of gas into the processing chamber 201 in the reverse order of the above order. As a result, the reaction between D CS gas and NH gas can be promoted, and Si N having a different composition ratio is formed on the main surface of wafer 200.
- the second gas for supplying the second processing gas is provided between the first gas supply nozzles for supplying the first processing gas.
- the second gas supply nozzle for supplying the second processing gas is disposed at a substantially central position where the first gas supply nozzle for supplying the first processing gas is disposed.
- the process tube 203 as a reaction tube is configured as a double tube having an inner tube 204 as an internal reaction tube and an outer tube 205 as an external reaction tube provided on the outside thereof. It had been.
- the present invention is not limited to the above-described form. That is, the process tube 203 is configured as a single tube without the inner tube 204, or may be configured as a single tube.
- the first aspect includes a step of carrying a plurality of substrates into a processing chamber, and at least one of a plurality of elements constituting a thin film formed on the main surface of the substrate, which is used alone. Supplying the first processing gas capable of depositing a film to the upstream side of the gas flow outside the region where the plurality of substrates carried into the processing chamber are disposed, and the plurality of elements A second process gas containing at least one other element, which cannot deposit a film by itself, out of a region where the plurality of substrates carried into the process chamber are disposed.
- the supply of the first processing gas to the middle portion of the gas flow is performed by the plurality of sheets of the first processing gas carried into the processing chamber.
- a third aspect is the first or second aspect, wherein the second processing gas is in the middle of a gas flow in a region where the plurality of substrates carried into the processing chamber are disposed. This is a method for manufacturing a semiconductor device further having a supply to a location.
- the second processing gas is carried into the processing chamber.
- the gas flow of the second process gas is further supplied to the middle part of the gas flow in the region where the plurality of substrates are arranged, and the second process gas is supplied to the middle part of the gas flow.
- a semiconductor device having a supply to a plurality of intermediate positions different from each other provided along a gas flow in a region where the plurality of substrates carried into the processing chamber are disposed. It is a manufacturing method.
- the supply of the second processing gas to the middle portion of the gas flow is performed by supplying the first processing gas of the second processing gas.
- the sixth aspect is the third aspect, wherein the second processing gas is supplied to the middle portion of the gas flow by the first processing gas of the second processing gas.
- This is a method for manufacturing a semiconductor device that is close to a midway location and has a supply to a midstream location of the gas flow provided upstream of the midstream location.
- the main surface temperature of the plurality of substrates carried into the processing chamber is set to at least the first processing gas and And the temperature of the second processing gas is increased to a temperature at which both of the plurality of substrates are thermally decomposed, and the principal surface temperature between the plurality of substrates is substantially uniform over the entire region where the plurality of substrates are disposed.
- the main surface temperatures of the plurality of substrates carried into the processing chamber are set to at least the first processing gas and And the temperature of the second processing gas is increased to a temperature at which both of the plurality of substrates are thermally decomposed, and the principal surface temperature between the plurality of substrates is substantially uniform over the entire region where the plurality of substrates are disposed.
- a ninth aspect is the method according to the first aspect, wherein the supply of the gas flow of the first processing gas to the upstream side is performed while the gas flow rate is controlled from the first gas supply unit.
- the first processing gas is supplied indoors, and the supply of the first processing gas to the middle portion of the gas flow is performed by controlling the gas flow rate in the first gas supply unit from the second gas supply unit.
- the semiconductor device that supplies the first processing gas into the processing chamber while independently controlling the gas flow rate. It is a manufacturing method.
- the supply of the gas flow of the second processing gas to the upstream side is performed by controlling the gas flow rate from the third gas supply unit while controlling the gas flow rate.
- the second process gas is supplied to the gas flow of the second process gas from the fourth gas supply unit to the gas flow rate control in the third gas supply unit.
- the plurality of substrates carried into the processing chamber are multi-staged in a horizontal posture and spaced apart from each other.
- a method for manufacturing an arrayed semiconductor device in the step of forming the thin film, the plurality of substrates carried into the processing chamber are multi-staged in a horizontal posture and spaced apart from each other.
- the first processing gas is a gas containing silicon element
- the second processing gas is a gas containing nitrogen element or oxygen element.
- the first processing gas is a gas containing a chlorine element
- the second processing gas is a gas containing a nitrogen element or an oxygen element. This is a method of manufacturing a semiconductor device.
- the first processing gas is any one of TCS, HCD, and BT BAS
- the second processing gas is NH gas.
- the supply of the first processing gas to a midpoint of the gas flow is performed by supplying the first processing gas through a nozzle. From the upstream side of the gas flow outside the region where the plurality of substrates carried into the processing chamber are arranged to a midpoint in the region where the plurality of substrates carried into the processing chamber are arranged. This is a method for manufacturing a semiconductor device in which gas is distributed.
- the supply of the first processing gas to the middle portion of the gas flow is performed by passing the first processing gas through a plurality of nozzles having different lengths.
- Supply The plurality of nozzles having different lengths are formed by the plurality of substrates carried into the processing chamber from the upstream side of the gas flow outside the region where the plurality of substrates carried into the processing chamber are arranged.
- the supply of the second processing gas to a midpoint of the gas flow is performed by supplying the second processing gas via a nozzle, From the upstream side of the gas flow outside the region where the plurality of substrates carried into the processing chamber are arranged to a midpoint in the region where the plurality of substrates carried into the processing chamber are arranged.
- the second processing gas is supplied to the middle portion of the gas flow through a plurality of nozzles having different lengths.
- the plurality of nozzles having different lengths are supplied from the upstream side of the gas flow outside the region where the plurality of substrates carried into the processing chamber are arranged.
- the supply of the second processing gas to the midpoint of the gas flow is performed by using the second processing gas and the gas flow of the first processing gas.
- This is a method for manufacturing a semiconductor device to be supplied so as to be merged with the gas flow of the first processing gas in the supply to an intermediate point.
- the supply of the first processing gas to the midpoint of the gas flow is performed by supplying the plurality of sheets in which the first processing gas is carried into the processing chamber. This is a method for manufacturing a semiconductor device to be supplied toward the center of the main surface of the substrate.
- the supply of the first processing gas to the middle portion of the gas flow is performed by using the first plurality of first nozzles having different lengths from each other.
- the second processing gas is supplied to the middle portion of the gas flow of the second processing gas by using the second processing gas having the same length among the first plurality of nozzles.
- This is a method for manufacturing a semiconductor device that is supplied through a plurality of second plurality of nozzles that are arranged adjacent to each other and have different lengths.
- the step of forming the thin film is supplied by supplying a gas flow upstream of a region outside the region where the plurality of substrates are arranged.
- the process gas and the second process gas are reacted to form an amorphous body, and a thin film is formed on the main surface of the plurality of substrates, and the plurality of sheets carried into the process chamber
- the first processing gas supplied by supply to the intermediate position in the region where the substrates are arranged reacts with the second processing gas to form an amorphous body, and the first processing gas Forming a thin film on a main surface of the plurality of substrates on the downstream side of supply to an intermediate position, and a method for manufacturing a semiconductor device.
- the step of forming the thin film is performed in the upstream of the gas flow outside the region where the plurality of substrates carried into the processing chamber are arranged.
- the first processing gas supplied by the supply and the second processing gas supplied by the upstream supply of the gas flow outside the region are reacted to form an amorphous body, and the plurality of sheets
- a step of carrying in a plurality of substrates into a processing chamber, and a region in which the plurality of substrates carried in a gas containing silane-based gas into the processing chamber are arranged An ammonia-based gas or a nitrogen oxide gas was carried into the processing chamber while being supplied to the upstream side of the outside gas flow and to an intermediate position in the region where the plurality of substrates carried into the processing chamber are arranged.
- the plurality of substrates are supplied to the upstream side of the gas flow outside the region where the plurality of substrates are arranged, and the gas containing the silane-based gas and the ammonia-based gas or the nitrogen oxide gas are reacted.
- a film forming process for forming a thin film on the main surface of the semiconductor device.
- the gas supply flow rate in the supply of the gas flow of the second processing gas to the upstream side of the gas flow of the first processing gas is the upstream of the gas flow of the first processing gas.
- a twenty-sixth aspect is the method according to the third aspect, wherein the first process gas is supplied to the middle of the gas flow relative to the gas supply flow rate in the upstream supply of the gas flow of the first process gas.
- the gas in the supply to the middle of the gas flow of the second processing gas with respect to the flow rate ratio of the gas supply flow in the supply and the gas supply flow rate in the upstream supply of the gas flow of the second processing gas This is a method for manufacturing a semiconductor device in which the flow rate ratio of the supply flow rate is substantially the same.
- a processing chamber for forming a thin film on a main surface of a plurality of substrates, a heater provided outside the processing chamber for heating the processing chamber, and a main surface of the substrate are formed.
- a first processing gas containing at least one element of a plurality of elements constituting the thin film and capable of depositing a film alone is a region not facing the heater in the processing chamber, and is in the processing chamber
- a first gas supply unit that supplies an upstream side of the gas flow outside the region where the plurality of substrates carried in the substrate are disposed; and the first gas supply unit is provided independently of the first gas supply unit
- a second gas that supplies one processing gas to an intermediate position of the gas flow in a region facing the heater in the processing chamber and in which the plurality of substrates carried into the processing chamber are arranged
- a supply unit and other few of the plurality of elements The second process gas that contains one element and cannot be deposited by itself alone is a region that does not face the heater in the processing chamber, and is loaded into the processing chamber.
- a third gas supply unit for supplying the gas flow upstream of the region where the substrate is disposed, and the plurality of substrates carried in the processing chamber in a region not facing the heater in the processing chamber. Is provided on the downstream side of the gas flow outside the region where the gas is disposed, and the exhaust unit that exhausts the processing chamber, the first processing gas, and the second processing gas are reacted in the processing chamber. And a controller that controls to form an amorphous material and form thin films of the plurality of substrates.
- the second gas supply unit has a plurality of first gas supply nozzles having different lengths, and the first gas supply nozzle is A region where the plurality of substrates carried into the processing chamber are arranged from the upstream side of the gas flow outside the region where the plurality of substrates carried into the processing chamber are arranged.
- Gas flow And a substrate processing apparatus that extends to a plurality of intermediate positions that are provided along different positions.
- the twenty-ninth aspect is provided independently of the third gas supply unit, and the second processing gas is opposed to the heater in the processing chamber.
- the substrate processing apparatus further includes a fourth gas supply unit that supplies an intermediate portion of the gas flow in the region where the plurality of substrates carried into the processing chamber are disposed.
- the thirty-second aspect is provided independently of the third gas supply unit, and the second processing gas is supplied in a region facing the heater in the processing chamber. Therefore, the apparatus further includes a fourth gas supply unit that supplies the gas flow in a region in the region where the plurality of substrates carried into the processing chamber are disposed, and the fourth gas supply unit includes:
- the second gas supply nozzle has a plurality of second gas supply nozzles having different lengths from each other, and the second gas supply nozzle is located upstream of the gas flow outside the region where the plurality of substrates carried into the processing chamber are disposed. And extending from a side to a plurality of intermediate positions at different positions provided along a gas flow within a region where the plurality of substrates carried into the processing chamber are arranged.
- the first processing gas and the second processing gas both heat the main surface temperatures of the plurality of substrates carried into the processing chamber.
- the heater is controlled to raise the temperature to a temperature at which the substrate is decomposed and to maintain the principal surface temperature between the plurality of substrates so as to be substantially uniform over the entire region where the plurality of substrates are disposed.
- the substrate processing apparatus further includes a temperature control unit.
- the first gas supply nozzle and the second gas supply nozzle are arranged such that the nozzles having substantially the same length are adjacent to each other. This is a substrate processing apparatus that is arranged.
- the thirty-third aspect includes a step of carrying a plurality of substrates into the processing chamber, and a region outside the region where the plurality of substrates carried into the processing chamber from the first gas supply unit are arranged.
- the processing gas since each processing gas is supplied in the middle of the gas flow in addition to the upstream side of the gas flow, the processing gas can be uniformly supplied to the plurality of substrates, and the plurality of substrates can be supplied on the plurality of substrates.
- the film can be formed uniformly. Accordingly, high productivity can be realized while maintaining good film-forming characteristics on the substrate, that is, film thickness uniformity between the substrates and in the substrate surface.
- a step of carrying a plurality of substrates into the processing chamber, and a gas flow outside the region where the plurality of substrates carried into the processing chamber from the first gas supply unit are present.
- the step of supplying the first processing gas while controlling the gas flow rate to the flow side, and the second gas supply unit provided independently of the first gas supply unit, are carried into the processing chamber Supplying a first processing gas to a midpoint corresponding to a region where a plurality of substrates are disposed, while controlling the gas flow rate independently of the gas flow rate control of the first gas supply unit;
- the second processing of a gas type different from the first processing gas while controlling the gas flow rate from the gas supply unit to the upstream side of the gas flow outside the region where the plurality of substrates carried into the processing chamber is present.
- a step of supplying a gas and a fourth gas provided independently of the third gas supply unit Gas flow control from a supply unit to a midway location substantially the same as the midway location for supplying the first process gas from the second gas supply unit, independent of the gas flow rate control of the third gas supply unit
- a step of supplying the second processing gas, a step of processing the plurality of substrates by reacting with the first processing gas and the second processing gas in the processing chamber, and a substrate after processing And a step of unloading the semiconductor device from the processing chamber.
- each processing gas is supplied while controlling the gas flow rate independently of the gas flow in addition to the upstream side of the gas flow, the processing gas is supplied to a plurality of substrates.
- the film can be supplied uniformly and can be formed more uniformly on a plurality of substrates. Therefore, higher productivity can be realized while maintaining good film formation characteristics on the substrate.
- a processing chamber for processing a plurality of substrates for processing a plurality of substrates, a holder for holding the plurality of substrates in the processing chamber, and a gas flow outside the region where the plurality of substrates exist are provided.
- the first gas supply unit that supplies the first processing gas to the substrate from the upstream side and the first gas supply unit are provided independently of each other and correspond to the region where the plurality of substrates are arranged.
- a second gas supply unit that supplies the first processing gas to the substrate from a midpoint, and the first gas to the substrate from the upstream side of the gas flow outside the region where the plurality of substrates exist.
- a third gas supply unit that supplies a second process gas of a gas type different from the process gas and the third gas supply unit are provided independently of each other, and the second gas supply unit is provided in the first gas supply unit.
- the second processing gas is supplied to the substrate from substantially the same midpoint as the midpoint where the processing gas is supplied.
- a substrate processing apparatus having a fourth gas supply unit and an exhaust unit configured to exhaust the processing chamber from the downstream side of the plurality of substrates.
- the second and fourth gas sources that supply each processing gas also in the middle place. Since the gas supply unit is provided, the processing gas can be uniformly supplied to the plurality of substrates, and the film can be uniformly formed on the plurality of substrates. Therefore, high productivity can be realized while maintaining good film-forming characteristics on the substrate, that is, film thickness uniformity between the substrates and within the substrate surface.
- a processing chamber for processing a plurality of substrates, a holder for holding the plurality of substrates in the processing chamber, and a gas flow outside the region where the plurality of substrates exist.
- the first gas supply unit that supplies the first processing gas to the substrate from the upstream side while controlling the gas flow rate is provided independently from the first gas supply unit, and the plurality of substrates are arranged.
- a second gas supply unit that supplies the first process gas to the substrate while controlling the gas flow rate independently of the gas flow rate control of the first gas supply unit from a midpoint corresponding to the region And supplying a second processing gas of a gas type different from the first processing gas from the upstream side outside the region where the substrate exists to the substrate from the upstream side of the plurality of substrates while controlling the gas flow rate.
- 3 gas supply unit and the third gas supply unit are provided independently of each other, and the second gas supply unit Group substantially the same way portion and the middle portion for supplying the scan supply unit the first process gas
- a fourth gas supply unit that supplies the second processing gas to the plate while controlling the gas flow rate independently of the gas flow rate control of the third gas supply unit, and the plurality of substrates
- a downstream substrate processing apparatus having an exhaust section for exhausting the processing chamber.
- the gas flow rate is controlled independently from the first and third gas supply units that supply each processing gas while controlling the gas flow rate from the upstream side of the gas flow.
- the second and fourth gas supply units for supplying each processing gas are provided, the processing gas can be supplied more uniformly to the plurality of substrates, and the films can be formed more uniformly on the plurality of substrates. Therefore, higher productivity can be realized while maintaining good film-forming properties on the substrate.
- each of the second gas supply units is provided independently and corresponds to a region where the plurality of substrates are arranged.
- a plurality of first gas supply nozzles for supplying the first processing gas to the substrate from different midpoints; and the fourth gas supply units are provided independently of each other,
- a plurality of second gas supply nozzles that supply the second processing gas to the substrate from substantially the same intermediate location as each of the different intermediate locations at which each of the one gas supply nozzle supplies the first processing gas. Is a substrate processing apparatus.
- the second gas supply unit includes a plurality of first gas supply nozzles that supply the first processing gas from different midpoints
- the fourth gas supply unit includes different midpoints Power Since the plurality of second gas supply nozzles for supplying the second processing gas are included, the processing gas can be supplied more uniformly to the plurality of substrates, and the films can be formed more uniformly on the plurality of substrates. Therefore, higher productivity can be realized while maintaining good film-forming properties on the substrate.
- a cleaning gas supply unit that supplies a cleaning gas into the second gas supply unit is connected to the second gas supply unit.
- a substrate processing apparatus In a thirty-eighth aspect, in the thirty-fifth to thirty-seventh aspects, a cleaning gas supply unit that supplies a cleaning gas into the second gas supply unit is connected to the second gas supply unit.
- the cleaning gas supply unit since the cleaning gas supply unit is connected to the second gas supply unit, the inside of the second gas supply unit is cleaned by supplying the cleaning gas into the second gas supply unit. be able to. Thereby, the lifetime of the second gas supply unit can be extended. As a result, the replacement cycle of the second gas supply unit can be extended. This This can reduce the number of laborious replacement operations of the second gas supply unit. As a result, the operating rate of the apparatus can be improved.
- a thirty-ninth aspect is a method for manufacturing a semiconductor device according to the thirty-third or thirty-fourth aspect, wherein the first processing gas is ammonia gas.
- the fortyth aspect is a method for manufacturing a semiconductor device according to the thirty-third or thirty-fourth aspect, wherein the second processing gas is dichlorosilane (DCS) gas.
- DCS dichlorosilane
- the forty-first aspect is a method for manufacturing a semiconductor device according to the thirty-third or thirty-fourth aspect, wherein a silicon nitride film is formed on the processed substrate.
- a forty-second aspect is a substrate processing apparatus according to the thirty-seventh aspect, wherein the first gas supply nozzle and the second gas supply nozzle are each two or more.
- the cleaning process for Nozure 41 to 45 and Nozure 46 to 50 (Care to f, Nozure 41 to 45, Nozure 46 to 50 (The flow rate of cleaning gas supplied per unit time is Forces explained to be controlled by the MFC183 and MFC184 based on the instructions, respectively.
- the flow rate per unit time of the cleaning gas supplied to the nozzles 41 to 45 and nozzles 46 to 50 is independent.
- MFC183 and MFC184 MFC is provided in each of the piping parts 83 to 87 and the piping parts 110 to 115 so that the control is performed based on the instructions of the controller 240. Good! This is advantageous in terms of productivity because the cleaning process can be performed simultaneously.
- An Si N film is deposited on the inner wall of the process tube 203, and mainly on the inner walls of the nozzles 41 to 44.
- Poly—Si film is deposited. For this reason, it is effective in terms of control to suppress the generation of particles by changing the frequency of the cleaning process to the inner wall of the process tube 203 and the cleaning process to the inner wall of Nozzle 41-44. It is.
- Noznore 50 deposits on the inner wall with a small amount of NH C1. Therefore, professional
- the cleaning process is effective in controlling the generation of particles.
- the cleaning process for the inner wall of process tube 203, the cleaning process for the inner walls of Nozure 41-44, the cleaning process for the inner walls of Nozure 46-49, and the cleaning process for the inner walls of Nozure 45, 50 are less frequent. Good.
- the nose no. 44 and the nose no. 49 are positioned in the first wafer existing in the product wafer / monitor arrangement area R.
- Nozzle 45 stops on the upstream side of the gas flow outside the area R, and the substrate of the film from 1 wafer to 25 wafers counted by the lower force of the product wafer / monitor wafer by gas supply from the nozzle 50 If the in-plane uniformity, substrate surface uniformity, and film quality are good, the nozzle 44 and nozzle 49 can be omitted.
- the nozzle 45 and the nozzle 50 are stopped on the upstream side of the gas flow outside the wafer placement region R, they can be inserted and started up from the bottom in the processing furnace 202.
- the present invention can be applied to a horizontal type CVD apparatus in addition to a vertical type CVD apparatus. Further, the present invention can also be applied to a single wafer type CDV apparatus that can be used only with a notch type CVD apparatus. Furthermore, the present invention can also be applied to a normal pressure type CVD apparatus as well as a low pressure type CVD apparatus. The present invention can also be applied to wafer processing apparatuses other than CVD apparatuses. That is, the present invention can be applied to a general wafer processing apparatus that performs a predetermined process on a wafer using a chemical reaction in a reaction space. The present invention can also be applied to substrate processing apparatuses other than wafer processing apparatuses. For example, the present invention can also be applied to a glass substrate processing apparatus that performs a predetermined process on a glass substrate of a liquid crystal display device.
- the present invention can be applied to a general substrate processing apparatus in which a reaction product is deposited on the inner wall of a processing gas output means such as a nozzle by performing a predetermined process on a substrate of a solid device. it can.
- FIG. 1 is a configuration diagram showing a gas supply system of a processing furnace constituting a part of a substrate processing apparatus according to a first embodiment of the present invention.
- FIG. 2 is a configuration diagram showing a gas supply system of a processing furnace constituting a part of a substrate processing apparatus according to a second embodiment of the present invention.
- FIG. 3 is a schematic configuration diagram of a processing furnace constituting a part of a substrate processing apparatus according to an embodiment of the present invention.
- FIG. 4 is a schematic configuration diagram of a processing furnace constituting a part of a conventional substrate processing apparatus.
- FIG. 5 is a configuration diagram showing a configuration of a gas supply nozzle of a processing furnace constituting a part of a substrate processing apparatus according to a third embodiment of the present invention.
- FIG. 6 A configuration diagram showing a configuration of a gas supply nozzle of a processing furnace constituting a part of a substrate processing apparatus according to a fourth embodiment of the present invention.
- FIG. 7 is a configuration diagram showing a configuration of a gas supply nozzle of a processing furnace constituting a part of a substrate processing apparatus according to a fifth embodiment of the present invention.
- FIG. 8] is a configuration diagram showing a configuration of a gas supply nozzle of a processing furnace constituting a part of a substrate processing apparatus according to a sixth embodiment of the present invention, and (a) is a plan sectional view of the processing furnace. (B) is a schematic diagram showing the arrangement of gas supply nozzles in the processing furnace.
- FIG. 9 is a configuration diagram showing a configuration of a gas supply nozzle of a processing furnace constituting a part of a substrate processing apparatus according to a seventh embodiment of the present invention, and (a) is a plan sectional view of the processing furnace. (B) is a schematic diagram showing the arrangement of gas supply nozzles in the processing furnace.
- FIG. 10 It is a block diagram showing the configuration of the gas supply nozzle of the processing furnace constituting a part of the substrate processing apparatus of the eighth embodiment of the present invention, (a) is a plan sectional view of the processing furnace, (B) is a schematic diagram showing the arrangement of gas supply nozzles in the processing furnace.
- FIG. 11 A configuration diagram showing a configuration of a gas supply nozzle of a processing furnace constituting a part of a substrate processing apparatus according to a ninth embodiment of the present invention.
- Fig. 12 is a graph showing the film thickness distribution between thin film wafers formed by a method that does not supply process gas to an intermediate location, and (a) shows the film thickness distribution when a plurality of wafers are provided with temperature gradients. (B) shows the film thickness distribution when no temperature gradient is provided.
- Figure 2 shows the film thickness distribution when only DCS gas is supplied to an intermediate location, and (b) shows the film thickness distribution when DCS gas supply locations are further increased.
- Distribution of the refractive index of thin film between wafers when a thin film is formed by a method that does not supply process gas to an intermediate location, and refractive index of a thin film when a thin film is formed by a method that supplies process gas to an intermediate location It is a graph which shows distribution between the wafers.
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Abstract
Description
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US12/223,718 US8304328B2 (en) | 2006-03-20 | 2007-03-15 | Manufacturing method of semiconductor device and substrate processing apparatus |
JP2008506274A JP4733738B2 (ja) | 2006-03-20 | 2007-03-15 | 半導体装置の製造方法および基板処理装置 |
US13/632,837 US20130068159A1 (en) | 2006-03-20 | 2012-10-01 | Manufacturing Method of Semiconductor Device and Substrate Processing Apparatus |
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US13/632,837 Division US20130068159A1 (en) | 2006-03-20 | 2012-10-01 | Manufacturing Method of Semiconductor Device and Substrate Processing Apparatus |
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JP (1) | JP4733738B2 (ja) |
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JPWO2014142031A1 (ja) * | 2013-03-13 | 2017-02-16 | 株式会社日立国際電気 | 基板処理装置、基板処理装置の制御方法、クリーニング方法及び半導体装置の製造方法並びに記録媒体 |
JP2017157744A (ja) * | 2016-03-03 | 2017-09-07 | 東京エレクトロン株式会社 | 気化原料供給装置及びこれを用いた基板処理装置 |
JP2019203191A (ja) * | 2018-04-30 | 2019-11-28 | アーエスエム・イーぺー・ホールディング・ベスローテン・フェンノートシャップ | 基材処理装置および方法 |
Also Published As
Publication number | Publication date |
---|---|
US20090087964A1 (en) | 2009-04-02 |
TW200741823A (en) | 2007-11-01 |
JP4733738B2 (ja) | 2011-07-27 |
US20130068159A1 (en) | 2013-03-21 |
JPWO2007108401A1 (ja) | 2009-08-06 |
US8304328B2 (en) | 2012-11-06 |
TWI342584B (ja) | 2011-05-21 |
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