WO2022215948A1 - 반도체 제조설비 및 이의 운영방법 - Google Patents
반도체 제조설비 및 이의 운영방법 Download PDFInfo
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- WO2022215948A1 WO2022215948A1 PCT/KR2022/004605 KR2022004605W WO2022215948A1 WO 2022215948 A1 WO2022215948 A1 WO 2022215948A1 KR 2022004605 W KR2022004605 W KR 2022004605W WO 2022215948 A1 WO2022215948 A1 WO 2022215948A1
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- Prior art keywords
- gas
- plasma
- vacuum pump
- semiconductor manufacturing
- chamber
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 75
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 73
- 238000011017 operating method Methods 0.000 title abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 184
- 238000000034 method Methods 0.000 claims abstract description 169
- 230000008569 process Effects 0.000 claims abstract description 132
- 238000006243 chemical reaction Methods 0.000 claims abstract description 87
- 229910003481 amorphous carbon Inorganic materials 0.000 claims abstract description 86
- 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 claims abstract description 31
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000001301 oxygen Substances 0.000 claims abstract description 27
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 27
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 229930195733 hydrocarbon Natural products 0.000 claims description 38
- 150000002430 hydrocarbons Chemical class 0.000 claims description 38
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 30
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 24
- 229910052731 fluorine Inorganic materials 0.000 claims description 22
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 18
- 229910001882 dioxygen Inorganic materials 0.000 claims description 18
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 16
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 16
- 239000011737 fluorine Substances 0.000 claims description 16
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 15
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 12
- 239000001569 carbon dioxide Substances 0.000 claims description 12
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 claims description 10
- 125000001153 fluoro group Chemical group F* 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 claims description 5
- 150000001721 carbon Chemical group 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 claims description 2
- IIGJROFZMAKYMN-UHFFFAOYSA-N [C].FC(F)(F)F Chemical compound [C].FC(F)(F)F IIGJROFZMAKYMN-UHFFFAOYSA-N 0.000 claims 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims 1
- 238000009616 inductively coupled plasma Methods 0.000 description 7
- 238000005137 deposition process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32798—Further details of plasma apparatus not provided for in groups H01J37/3244 - H01J37/32788; special provisions for cleaning or maintenance of the apparatus
- H01J37/32816—Pressure
- H01J37/32834—Exhausting
- H01J37/32844—Treating effluent gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
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- 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
- C23C16/26—Deposition of carbon only
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- 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
- C23C16/26—Deposition of carbon only
- C23C16/27—Diamond only
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- 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
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- 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
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- 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
- C23C16/4412—Details relating to the exhausts, e.g. pumps, filters, scrubbers, particle traps
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- 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
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- 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
- C23C16/50—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 using electric discharges
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
- H01J37/32449—Gas control, e.g. control of the gas flow
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32798—Further details of plasma apparatus not provided for in groups H01J37/3244 - H01J37/32788; special provisions for cleaning or maintenance of the apparatus
- H01J37/32816—Pressure
- H01J37/32834—Exhausting
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- 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
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- 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
- H01L21/02115—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 being carbon, e.g. alpha-C, diamond or hydrogen doped carbon
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- 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
- H01L21/02274—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 in the presence of a plasma [PECVD]
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- 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
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- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/18—Vacuum control means
- H01J2237/182—Obtaining or maintaining desired pressure
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- H—ELECTRICITY
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- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/332—Coating
Definitions
- the present invention relates to an exhaust gas treatment technology, and more particularly, to a technology for treating exhaust gas generated in a semiconductor manufacturing process using plasma.
- a semiconductor device is manufactured by repeatedly performing processes such as photolithography, etching, diffusion, and metal deposition on a wafer in a process chamber using various process gases. After the semiconductor process is completed, residual gas is present in the process chamber. Since the residual gas in the process chamber contains harmful components such as toxic components, it is discharged by a vacuum pump and purified by an exhaust gas treatment device such as a scrubber. do.
- the ACL (Amorphous Carbon Layer, amorphous carbon film) process is a process in which amorphous carbon is deposited in a semiconductor manufacturing process to form an amorphous carbon film (ACL).
- ACL amorphous Carbon Film
- the exhaust gas of the ACL process contains hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ).
- Hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ) contained in the exhaust gas of the ACL process are deposited in the vacuum pump, thereby reducing the performance of the vacuum pump and shortening the MTBF of the vacuum pump. .
- An object of the present invention is to provide a semiconductor manufacturing facility for removing hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ) that are deposited in a vacuum pump in an ACL process facility to form a film, and an operating method thereof.
- aC:H hydrogenated amorphous carbon
- C X H Y hydrocarbons
- Another object of the present invention is to provide a semiconductor manufacturing facility for preventing hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ) discharged from the process chamber in the ACL process from flowing into a vacuum pump and an operating method thereof will be.
- aC:H hydrogenated amorphous carbon
- C X H Y hydrocarbons
- amorphous carbon Amorphous Carbon
- oxygen gas supplied to the plasma reactor is decomposed in the plasma region of the plasma reactor to generate heated reactive oxygen, and the generated reactive oxygen flows into the vacuum pump and reacts with hydrogenated amorphous carbon deposited in the vacuum pump, The hydrogenated amorphous carbon deposited in the vacuum pump is removed.
- a-C:H hydrogenated amorphous carbon
- oxygen gas additionally supplied by the plasma reaction to generate carbon dioxide gas, carbon monoxide gas, and water vapor. It is prevented that amorphous carbon (a-C:H) is included.
- hydrocarbons (C X H Y ) deposited on the vacuum pump are removed by reacting with fluorine (F 2 ) generated by decomposing nitrogen trifluoride (NF 3 ) into plasma, thereby preventing deterioration of the performance of the vacuum pump .
- hydrocarbons (C X H Y ) included in the exhaust gas are decomposed in a plasma reaction together with nitrogen trifluoride (NF 3 ) in the plasma reaction region, thereby preventing the performance degradation of the vacuum pump.
- FIG. 1 is a block diagram illustrating a schematic configuration of a semiconductor manufacturing facility according to an embodiment of the present invention.
- FIG. 2 is a longitudinal cross-sectional view of a plasma reactor in the plasma apparatus of the semiconductor manufacturing facility shown in FIG. 1 .
- FIG. 3 is a perspective view illustrating the magnetic core shown in FIG. 2 .
- FIG. 4 is a diagram schematically showing the configuration of an ignition system used in a plasma apparatus of the semiconductor manufacturing facility shown in FIG. 1 .
- FIG. 5 is a flowchart schematically illustrating a method of operating a semiconductor manufacturing facility according to an embodiment of the present invention.
- FIG. 6 is a graph showing results according to the operating method of the semiconductor manufacturing facility shown in FIG. 5 , and shows a processing state of hydrogenated amorphous carbon according to an operating state of a plasma apparatus.
- FIG. 7 is a graph showing results according to the operation method of the semiconductor manufacturing facility shown in FIG. 5, and shows the treatment state of hydrogenated amorphous carbon according to the presence/absence of plasma.
- FIG. 8 is a comparative photograph confirming the reduced state of the hydrogenated amorphous carbon film in the vacuum pump as a result of the operation method of the semiconductor manufacturing facility shown in FIG. 5 .
- FIG. 9 is a graph showing a relationship between an oxygen supply flow rate and a reduction amount of hydrogenated amorphous carbon in the operating method of the semiconductor manufacturing facility shown in FIG. 5 .
- FIG. 10 is a flowchart schematically illustrating a method of operating a semiconductor manufacturing facility according to another embodiment of the present invention.
- FIG. 11 is a view schematically illustrating a state in which hydrogenated amorphous carbon (a-C:H) is processed in a plasma reactor according to the operating method of the semiconductor manufacturing facility shown in FIG. 10 .
- a-C:H hydrogenated amorphous carbon
- FIG. 12 is a block diagram illustrating a schematic configuration of a semiconductor manufacturing facility according to another embodiment of the present invention.
- FIG. 13 is a longitudinal cross-sectional view of a plasma reactor in the plasma apparatus of the semiconductor manufacturing facility shown in FIG. 12 .
- a semiconductor manufacturing facility 100 includes a semiconductor manufacturing equipment 101 in which a semiconductor manufacturing process for manufacturing a semiconductor device is performed, and gas from the semiconductor manufacturing equipment 101 .
- aC:H amorphous carbon
- the semiconductor manufacturing equipment 101 includes a process chamber 102 in which a semiconductor manufacturing process using various process gases is performed.
- the process chamber 102 includes all types of process chambers commonly used for semiconductor manufacturing in the field of semiconductor manufacturing equipment.
- the residual gas generated in the process chamber 102 is purified by the exhaust gas treatment equipment 106 while being discharged to the outside by the exhaust equipment 103 .
- a typical ACL (Amorphous Carbon Layer, amorphous carbon film) process is performed in the process chamber 102 .
- the ACL process refers to a process in which amorphous carbon is deposited in a semiconductor process to form an amorphous carbon film (ACL).
- a residual gas including hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ) is generated in the process chamber 102 .
- the residual gas including hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ) generated in the process chamber 102 is removed from the process chamber 102 by the exhaust device 103 . is emitted
- the exhaust device 103 discharges residual gas including hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ) generated in the process chamber 102 after the ACL process is performed.
- the exhaust device 103 includes a vacuum pump 104, a chamber exhaust pipe 105a that connects the process chamber 102 and the vacuum pump 104, and the residual gas discharged from the process chamber 102 flows as exhaust gas;
- a pump exhaust pipe 105b extending downstream from the vacuum pump 104 through which exhaust gas flows is provided.
- the vacuum pump 104 forms a negative pressure on the side of the process chamber 102 through the chamber exhaust pipe 105a connecting the process chamber 102 and the vacuum pump 104 in order to discharge the residual gas of the process chamber 102 . . Since the vacuum pump 104 includes a configuration of a vacuum pump commonly used in the field of semiconductor manufacturing equipment, a detailed description thereof will be omitted. Hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ) contained in exhaust gas are introduced into the vacuum pump 104 through the chamber exhaust pipe 105a, and the hydrogenated amorphous carbon ( aC:H) and hydrocarbons (C X H Y ) are deposited to form a film.
- aC:H Hydrogenated amorphous carbon
- C X H Y hydrocarbons
- the chamber exhaust pipe 105a connects the exhaust port of the process chamber 102 and the suction port of the vacuum pump 104 between the process chamber 102 and the vacuum pump 104 .
- the residual gas of the process chamber 102 is discharged through the chamber exhaust pipe 105a by the negative pressure generated by the vacuum pump 104 to form exhaust gas.
- a pump exhaust pipe 105b extends downstream from the vacuum pump 104 .
- the pump exhaust pipe 105b is connected to the discharge port of the vacuum pump 104 so that the exhaust gas discharged from the vacuum pump 104 flows.
- the exhaust gas treatment equipment 106 processes and purifies harmful components included in the exhaust gas of the process chamber 102 .
- the exhaust gas treatment equipment 106 includes a scrubber 107 for treating the exhaust gas.
- the scrubber 107 is connected to the downstream end of the pump exhaust pipe 105b to treat harmful components contained in the exhaust gas discharged from the vacuum pump 104 .
- the scrubber 107 includes all types of scrubbers commonly used for treating exhaust gases in the field of semiconductor manufacturing equipment technology.
- a plasma apparatus 108 processes hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ) deposited in a vacuum pump 103 .
- the plasma apparatus 108 generates excited oxygen atoms (O * ), which are reactive species, from oxygen (O 2 ) using plasma for removal of hydrogenated amorphous carbon.
- the plasma apparatus 108 generates excited fluorine atoms (F * ) and fluorine (F 2 ) as reactive active species from nitrogen trifluoride (NF 3 ) using plasma for removal of hydrocarbons (C X H Y ). do.
- the plasma apparatus 108 includes a plasma reactor 110 installed on the chamber exhaust pipe 105a, a power source 180 for supplying power to the plasma reactor 110, and oxygen gas or nitrogen trifluoride as the plasma reactor 110 .
- a gas supply 185 for supplying (NF 3 ) is provided.
- the plasma reactor 110 is installed on the chamber exhaust pipe 105a to decompose oxygen gas or nitrogen trifluoride supplied from the gas supplier 185 using plasma.
- oxygen (O 2 ) is decomposed into oxygen atoms excited by plasma (O * ).
- nitrogen trifluoride is a fluorine atom (F * ) excited by plasma, a nitrogen atom excited (N * ), fluorine (F 2 ), nitrogen (N 2 ) and electrons (e) is decomposed into components comprising
- oxygen (O 2 ) is decomposed and generated excited oxygen atoms (O * ) are introduced into the vacuum pump 104 to react with the hydrogenated amorphous carbon deposited in the vacuum pump 104 .
- the plasma reactor 110 nitrogen trifluoride (NF 3 ) is decomposed and generated fluorine (F 2 ) is introduced into the vacuum pump 104 and reacts with hydrocarbons (C X H Y ) deposited in the vacuum pump 104 .
- ICP inductively Coupled Plasma
- the plasma reactor 110 is described as an inductively coupled plasma reactor using an inductively coupled plasma (ICP: Inductively Coupled Plasma).
- the plasma reactor 110 is described as using an inductively coupled plasma, but the present invention is not limited thereto.
- the plasma reactor includes any type of plasma reactor that generates a plasma reaction (for example, a plasma reactor using a capacitively coupled plasma (CCP)), which also falls within the scope of the present invention.
- CCP capacitively coupled plasma
- the plasma reactor 110 includes a reaction chamber 120 , a magnetic core 130 disposed to surround the reaction chamber 120 , an igniter 140 for plasma ignition, and a magnetic core 130 .
- the plasma reactor 110 includes a reaction chamber 120 , a magnetic core 130 disposed to surround the reaction chamber 120 , an igniter 140 for plasma ignition, and a magnetic core 130 .
- a first coil (not shown) that is wound on and receives power from the power source 180
- a second coil (not shown) that is wound on the magnetic core 130 and supplies power to the igniter 140 .
- the reaction chamber 120 has a toroidal shape, and includes a gas inlet 121 , a gas outlet 123 spaced apart from the gas inlet 121 , and a gas inlet 121 .
- a plasma reaction unit 125 that connects the gas discharge unit 123 and generates a plasma reaction is provided.
- the gas discharged from the process chamber ( 102 of FIG. 1 ) is introduced into the vacuum pump 104 through the reaction chamber 120 through the chamber exhaust pipe ( 105a of FIG. 1 ).
- the gas inlet 121 is in the form of a short tube extending about the linear extension axis X, and the front end of the gas inlet 121 is opened to form an inlet 122 through which gas is introduced.
- the inlet 122 communicates with the exhaust port of the process chamber (102 in FIG. 1) through the chamber exhaust pipe (105a in FIG. 1).
- a gas injection port 121a through which the gas supplied from the gas supply 185 is injected is formed in the gas inlet 121 .
- the gas discharge unit 123 is a short tube shape coaxially spaced apart from the gas inlet unit 121 on the extension axis X, and the rear end of the gas discharge unit 123 is opened to discharge the gas. ) to form
- the outlet 124 communicates with the inlet of the vacuum pump (104 in FIG. 1) through the chamber exhaust pipe (105a in FIG. 1).
- the plasma reaction unit 125 connects the spaced-apart gas inlet 121 and the gas discharge unit 123 , and a plasma reaction area A in which a thermal reaction and a plasma reaction to the gas occur is formed.
- the plasma reaction unit 125 includes a first connection pipe part 126 and a second connection pipe part 127 positioned to be spaced apart from each other on both sides with the extension axis X interposed therebetween.
- the first connector part 126 and the second connector part 127 extend parallel to the extension axis X and communicate with the gas inlet 121 and the gas outlet 123 . Accordingly, plasma is generated in the plasma reaction unit 125 along an annular discharge loop R as shown by a broken line.
- the gas introduced through the gas injection hole 121a is decomposed by plasma in the plasma reaction region A.
- oxygen gas is introduced into the gas injection hole 121a, the decomposition reaction of oxygen gas by plasma in the plasma reaction region A is as shown in Reaction Equations 1 and 2 below.
- the excited oxygen atoms (O * ) generated by the plasma in the plasma reaction region (A) are heated to improve the reactivity with the hydrogenated amorphous carbon.
- the reaction chamber 120 is described as being configured by coupling the first chamber member 120a and the second chamber member 120b.
- the first chamber member 120a includes the entire gas inlet 121 , a part of the first connector part 126 connected to the gas inlet part 121 , and a part of the second connector part 127 .
- the second chamber member 120b includes the entire gas discharge part 123 , a part of the first connection pipe part 126 connected to the gas discharge part 123 , and a part of the second connection pipe part 127 .
- the magnetic core 130 is disposed to surround the reaction chamber 120 .
- the magnetic core 130 will be described as a ferrite core generally used in an inductively coupled plasma generator.
- 3 shows the magnetic core 130 as a perspective view. 2 and 3, the magnetic core 130 has a ring-shaped ring portion 131 surrounding the plasma reaction portion 125 of the reaction chamber 120 from the outside, and the inner region of the ring portion 131. It has a transverse connecting portion 135 .
- the ring portion 131 has a rectangular annular shape, and is disposed at a right angle to the extension axis X to surround the plasma reaction portion 125 of the reaction chamber 120 from the outside.
- the rectangular ring portion 131 has two opposite long sides 132a and 132b and two opposite short sides 133a and 133b.
- the connecting portion 135 extends in a straight line to connect between the two opposing long side portions 132a and 132b of the ring portion 131 . Both ends of the connection part 135 are connected to the center of each of the two long sides 132a and 132b.
- the connection part 135 is disposed to pass through the gap 128 formed between the first connection pipe part 126 and the second connection pipe part 127 of the reaction chamber 120 .
- the inner region of the ring portion 131 is separated into a first through hole 136 and a second through hole 137 by the connection portion 135 , and the first through hole 136 is connected to the first through hole of the reaction chamber 120 .
- the connector part 126 passes and the second connector part 127 of the reaction chamber 120 passes through the second through hole 137 .
- the magnetic core 130 has a shape that surrounds the first connector part 126 and the second connector part 127 of the reaction chamber 120 from the outside, respectively.
- the igniter 140 receives high voltage power from the power source 180 to ignite the plasma.
- the igniter 140 is described as being located adjacent to the gas inlet 121 in the plasma reaction unit 125 of the reaction chamber 120, but the present invention is not limited thereto.
- the first coil 150 is wound around the first long side 132a of the magnetic core 130 and is connected to the power source 180 .
- the first coil 150 receives an AC power of a radio frequency through the power source 180 to form an induced magnetic flux in the magnetic core 130 .
- An induced electric field is generated by the induced magnetic flux formed in the magnetic core 130 , and plasma is formed by the generated induced electric field.
- the first coil 150 is wound twice on the magnetic core 130, but the present invention is not limited thereto.
- the second coil 160 is wound on the second long side portion 132b of the magnetic core 130 while being separated from the first coil 150 , and is connected to the igniter 140 and the switch circuit (relay) 190 .
- An induced electromotive force is generated in the second coil 160 to supply power to the igniter 140 .
- the first coil 150 , the second coil 160 , and the magnetic core 130 serve as a transformer, so that a high voltage for the operation of the igniter 140 is formed in the second coil 160 and output .
- the second coil 160 is wound on the magnetic core 130 with a larger number of turns than the number of turns of the first coil 150 , and in this embodiment, it will be described as being wound six times.
- the power source 180 applies AC power of a radio frequency to the first coil 150 to generate inductively coupled plasma.
- the first coil 150 , the second coil 160 , and the magnetic core 130 function as a transformer. That is, the first coil 150 , the second coil 160 , and the magnetic core 130 serve as the primary coil, the secondary coil, and the iron core in the transformer.
- the boosted high voltage power can be applied to the igniter 140 .
- the gas supply 185 stores oxygen gas or nitrogen trifluoride, which is a processing gas, and supplies the stored oxygen gas or nitrogen trifluoride to the plasma reactor 110 through the gas supply pipe 188 .
- the gas supply pipe 188 is connected to the gas injection hole 121a formed in the gas inlet 121 of the reaction chamber 120 in the plasma reactor 110 .
- the oxygen gas supplied by the gas supplier 185 and introduced into the plasma reactor 150 is excited oxygen atoms (O * ) heated by the plasma in the plasma reaction region (A) of the plasma reactor 110 .
- nitrogen trifluoride supplied by the gas supplier 185 and introduced into the plasma reactor 150 is a fluorine atom (F * ), excitation by plasma in the plasma reaction region (A) of the plasma reactor 110 . It is decomposed into nitrogen atoms (N * ), fluorine (F 2 ), nitrogen (N 2 ) and electrons (e).
- the present invention provides a method of operating a plasma apparatus for processing chamber exhaust gas treatment.
- 5 is a flowchart schematically illustrating a method of operating a semiconductor manufacturing facility according to an embodiment of the present invention.
- the method of operating a semiconductor manufacturing facility according to an embodiment of the present invention shown in FIG. 5 is an operating method of the semiconductor manufacturing facility 100 shown in FIG. To remove some or all of carbon and hydrocarbons. 1 and 2 together with FIG.
- the method of operating a semiconductor manufacturing facility includes an ACL process step in which an amorphous carbon film (ACL) deposition process is performed in a process chamber 102 ( S100), the process stopping step (S110) in which the ACL process performed in the process chamber 102 is stopped, and the process stopping step (S110) are performed so that the vacuum pump ( and a deposit removal step (S120) of removing the hydrogenated amorphous carbon or hydrocarbon deposited in 104).
- ACL process step in which an amorphous carbon film (ACL) deposition process is performed in a process chamber 102 ( S100)
- the process stopping step (S110) in which the ACL process performed in the process chamber 102 is stopped
- the process stopping step (S110) are performed so that the vacuum pump ( and a deposit removal step (S120) of removing the hydrogenated amorphous carbon or hydrocarbon deposited in 104).
- a deposition process of an amorphous carbon film (ACL) is performed in the process chamber 102 . Since the deposition process of the amorphous carbon film (ACL) includes the configuration of an ACL process typically used in a semiconductor manufacturing process, a detailed description thereof will be omitted.
- the residual gas generated in the process chamber 102 while the ACL process step S100 is performed is discharged from the process chamber 102 through the chamber exhaust pipe 105a and the pump exhaust pipe 105b by the operation of the vacuum pump 104 to be exhausted. to form gas
- the exhaust gas of the ACL process contains hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ). Hydrogenated amorphous carbon and hydrocarbons included in the ACL process are deposited in a vacuum pump 104 .
- the process stopping step ( S110 ) the ACL process performed in the process chamber 102 and the discharge of the residual gas generated by the ACL process are stopped.
- the process stopping step S110 may include stopping for cleaning of the process chamber 102 . Since the process stopping step S110 is performed, the deposit removing step S120 is performed in a state in which the ACL process performed in the process chamber 102 and the discharge of the residual gas generated by the ACL process are stopped.
- the hydrogenated amorphous carbon and hydrocarbon deposited in the vacuum pump 104 are removed in a state in which the ACL process performed in the process chamber 102 and the residual gas generated by the ACL process are stopped.
- the deposit removal step ( S120 ) is performed by supplying oxygen gas or nitrogen trifluoride to the plasma reactor 110 by the gas supplier 185 while the plasma reactor 110 is in operation.
- the oxygen gas (O 2 ) supplied to the plasma reactor 110 in operation is decomposed by the plasma in the plasma reaction region (A) and thus [reaction formula 1] and A heated excited oxygen atom (O * ) is generated.
- the heated excited oxygen atoms (O * ) generated in the plasma reactor 110 are introduced into the vacuum pump 104 .
- the hydrogenated amorphous carbon deposited in the vacuum pump 104 is oxidized by reacting with heated excited oxygen atoms (O * ) introduced into the vacuum pump 104 .
- the hydrogenated amorphous carbon is oxidized to generate carbon dioxide gas (CO 2 ) and water vapor (H 2 O) and removed.
- 6 to 8 are test results showing the effect of removing the hydrogenated amorphous carbon deposited in the vacuum pump 104 according to the operating method of the semiconductor manufacturing facility shown in FIG. 5 .
- the graph of FIG. 6 shows the concentration of carbon dioxide (CO 2 ) in the vacuum pump 104 according to the plasma device 108 operating state (On, Off).
- the horizontal axis is time (minutes), and the vertical axis is carbon dioxide concentration (ppm).
- ppm carbon dioxide concentration
- the generation of carbon dioxide means removal by oxidation of hydrogenated amorphous carbon. It is confirmed from the graph of FIG. 6 that the hydrogenated amorphous carbon deposited in the vacuum pump 104 is removed, and the higher the temperature of the excited oxygen atoms flowing into the vacuum pump 104 is, the higher the removal effect of the hydrogenated amorphous carbon is. Confirmed.
- the graph of FIG. 7 shows the carbon dioxide (CO 2 ) concentration in the vacuum pump 104 according to the operating state (On, Off) of the plasma reactor 110 .
- the horizontal axis is time (minutes), and the vertical axis is carbon dioxide concentration (ppm).
- O * heated excited oxygen atoms
- FIG. 8 show the effect of removal of hydrogenated amorphous carbon deposited in vacuum pump 104 by plasma apparatus 108 .
- the picture on the left of FIG. 8 shows the thickness of the deposit in the vacuum pump 104 according to the position when the plasma device 108 is not operated, and the picture on the right of FIG. 8 shows the case where the plasma device 108 is operating In the vacuum pump 104, the thickness of the deposit is indicated according to the position.
- the average thickness of the deposits in the photo data on the left is 67.6 ⁇ m
- the thickness of the deposits in the photo data on the right is an average of 45.7 ⁇ m
- the deposition thickness of by-products is reduced by about 32% due to the action on the plasma device 108. that is confirmed
- the test data graph of FIG. 9 shows the relationship between the oxygen flow rate supplied to the plasma reactor 110 operating with 7 kW of power applied and the removal efficiency of the hydrogenated amorphous carbon deposited in the vacuum pump 104 .
- the horizontal axis is the oxygen flow rate (slm) supplied to the plasma reactor 110
- the left vertical axis is the oxidation reaction participation rate (%) of oxygen supplied to the plasma reactor 110
- the right vertical axis is the vacuum pump 104. It is the thickness decrease ( ⁇ m) of the hydrogenated amorphous carbon film deposited in Referring to FIG.
- the efficiency can be increased by supplying oxygen to the plasma reactor 110 at an oxygen flow rate representing the highest excited oxygen atom (O * ) production rate according to the operating power of the plasma reactor 110 to prevent unnecessary consumption of oxygen.
- the degree of oxidation reaction of the hydrogenated amorphous carbon deposited in the vacuum pump 104 increases in proportion to the temperature inside the vacuum pump 104 within the upper limit value. Accordingly, it is advantageous to apply high power to the plasma reactor 110 in order to increase the temperature of the excited oxygen atoms (O * ) generated in the plasma reactor 110 .
- the reduction rate of the thickness of the hydrogenated amorphous carbon film formed by deposition in the vacuum pump 104 satisfies the following proportional relationship.
- nitrogen trifluoride (NF 3 ) when nitrogen trifluoride (NF 3 ) is supplied to the plasma reactor 110, the nitrogen trifluoride supplied to the plasma reactor 110 in operation is excited by the plasma in the plasma reaction region (A). It is decomposed into components including a fluorine atom (F * ), an excited nitrogen atom (N * ), fluorine (F 2 ), nitrogen (N 2 ) and electrons (e). Fluorine (F 2 ) generated by decomposition of nitrogen trifluoride in the plasma reactor 110 is introduced into the vacuum pump 104 . Fluorine (F 2 ) introduced into the vacuum pump 104 reacts with hydrocarbons (C X H Y ) deposited in the vacuum pump 104 to generate hydrocarbons (C X H Y ) is removed.
- FIG. 10 is a flowchart schematically illustrating a method of operating a semiconductor manufacturing facility according to another embodiment of the present invention.
- the operating method of the semiconductor manufacturing facility according to another embodiment of the present invention shown in FIG. 10 is also an operating method of the semiconductor manufacturing facility 100 shown in FIG. 1 . Referring to FIG. 1 together with FIG.
- a method of operating a semiconductor manufacturing facility includes an ACL process step S200 in which an amorphous carbon film (ACL) deposition process is performed in a process chamber 102 and , an exhaust step (S210) of forming exhaust gas by operating the exhaust device 103 to discharge the residual gas in the process chamber 102 generated in the ACL process step (S200) from the process chamber 102, and an exhaust step (S210) ), including hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ) contained in the exhaust gas formed by the gas treatment step (S220) is treated.
- ACL process step S200 in which an amorphous carbon film (ACL) deposition process is performed in a process chamber 102 and , an exhaust step (S210) of forming exhaust gas by operating the exhaust device 103 to discharge the residual gas in the process chamber 102 generated in the ACL process step (S200) from the process chamber 102, and an exhaust step (S210) ), including hydrogenated amorphous carbon (a
- a deposition process of an amorphous carbon film (ACL) is performed in the process chamber 102 . Since the deposition process of the amorphous carbon film (ACL) includes the configuration of an ACL process typically used in a semiconductor manufacturing process, a detailed description thereof will be omitted.
- the residual gas generated in the process chamber 102 while the ACL process step S200 is performed is discharged from the process chamber 102 through the chamber exhaust pipe 105a and the pump exhaust pipe 105b by the operation of the vacuum pump 104 to be exhausted. to form gas
- the exhaust gas of the ACL process contains hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ).
- the vacuum pump 104 of the exhaust equipment 103 is operated after the completion of the ACL process step (S200) so that the residual gas in the process chamber 102 generated in the ACL process step (S200) is removed from the process chamber 102 ) is emitted from
- the residual gas discharged from the process chamber 102 flows along the chamber exhaust pipe 105a and the pump exhaust pipe 105b to form exhaust gas and flows into the scrubber 107 .
- the gas treatment step S220 is performed together.
- the gas treatment step ( S220 ) hydrogenated amorphous carbon (aC:H) or hydrocarbons (C X H Y ) contained in the exhaust gas is removed before being introduced into the vacuum pump 104 .
- the plasma reactor 110 is operated and oxygen gas or nitrogen trifluoride is supplied to the plasma reactor 110 by the gas supply 185 .
- FIG. 11 A process in which hydrogenated amorphous carbon (aC:H) contained in exhaust gas is treated in the gas treatment step S220 is shown in FIG. 11 .
- hydrogenated amorphous carbon (aC:H) and oxygen gas (O 2 ) are introduced into the plasma reaction region A formed in the plasma reactor 110 .
- Hydrogenated amorphous carbon (aC:H) flowing into the plasma reaction region (A) is included in the gas discharged from the process chamber (102 in FIG. 1), and oxygen gas (O 2 ) introduced into the plasma reaction region (A) ) is supplied from the gas supplier (185 in FIG. 1).
- the hydrogenated amorphous carbon (aC:H) introduced into the plasma reaction region (A) is a carbon atom (C * ) and an excited hydrogen atom (H * ) by the plasma reaction in the plasma reaction region (A). is decomposed into Oxygen gas (O 2 ) introduced into the plasma reaction region (A) is decomposed into excited oxygen atoms (O * ).
- a substitution (oxidation) reaction occurs between the excited carbon atoms (C * ), the excited hydrogen atoms (H * ), and the excited oxygen atoms (O * ) generated by the plasma reaction to generate carbon dioxide gas.
- CO 2 carbon monoxide gas
- H 2 O water vapor
- hydrogenated amorphous carbon (aC:H) in the plasma reaction region (A) of the plasma reactor 150 reacts with oxygen gas (O 2 ) additionally supplied by the plasma reaction to react with carbon dioxide gas (CO 2 ), carbon monoxide gas (CO) and water vapor (H 2 O). Accordingly, it is prevented that hydrogenated amorphous carbon (aC:H), which is a cause of failure of the vacuum pump 104, is contained in the gas discharged from the plasma reactor 110 and introduced into the vacuum pump 104 .
- Hydrocarbons (C X H Y ) included in the exhaust gas in the gas treatment step ( S220 ) may be treated.
- hydrocarbons (C X H Y ) and nitrogen trifluoride (NF 3 ) are introduced into the plasma reaction region A formed in the plasma reactor 110 .
- Hydrocarbons (C X H Y ) flowing into the plasma reaction region (A) are included in the exhaust gas of the ACL process, and nitrogen trifluoride (NF 3 ) flowing into the plasma reaction region (A) is a gas supply (FIG. 1). 185).
- hydrocarbons (C X H Y ) and nitrogen trifluoride (NF 3 ) are decomposed into atomic units by plasma reaction and then combined to form carbon tetrafluoride (CF 4 ), hydrofluoric acid (HF), ammonia (NH 3 ) ), hydrogen cyanide (HCN) is decomposed into components, and hydrocarbons (C X H Y ) are treated.
- the semiconductor manufacturing facility 200 includes the semiconductor manufacturing equipment 101 , the exhaust equipment 103 for discharging gas from the semiconductor manufacturing equipment 101 , and the semiconductor manufacturing equipment ( and an exhaust gas treatment equipment 106 for treating the gas discharged from 101, and a plasma device 208 for treating hydrogenated amorphous carbon (aC:H) and hydrocarbons (C X H Y ) using plasma. . Since the semiconductor manufacturing facility 200 has substantially the same configuration as the semiconductor manufacturing facility 100 shown in FIG. 1 except for the plasma device 208 , only the plasma device 208 will be described herein.
- the plasma apparatus 208 includes a plasma reactor 210 , a power source 180 for supplying power to the plasma reactor 210 , and a gas supply 185 for supplying gas to the plasma reactor 210 . Since the plasma apparatus 208 has substantially the same configuration as the plasma apparatus 108 shown in FIG. 1 except for the plasma reactor 210 , only the plasma reactor 210 will be described herein.
- the plasma reactor 210 includes a reaction chamber 220 , a magnetic core 130 disposed to surround the reaction chamber 220 , an igniter 140 for plasma ignition, and a magnetic core 130 . ) and having a coil (not shown) wound on and receiving power from a power source 180 . Since the plasma reactor 210 has substantially the same configuration as the reaction chamber 120 shown in FIG. 2 except for the configuration of the reaction chamber 220 , only the reaction chamber 220 will be described herein.
- the reaction chamber 220 is a toroidal-shaped chamber, and includes a gas inlet 121 , a gas outlet 123 spaced apart from the gas inlet 121 , and a gas inlet 121 .
- a plasma reaction unit 125 that connects the gas discharge unit 123 and generates a plasma reaction is provided.
- the reaction chamber 120 decomposes the gas supplied from the gas supplier 185 using plasma to generate reactive active species.
- the overall configuration of the reaction chamber 220 has substantially the same configuration as that of the reaction chamber 120 illustrated in FIG. 2 . However, the inlet 122 of the gas inlet 121 communicates with the gas supply 185 through the inlet pipe 186 , and the outlet 124 of the gas outlet 123 is connected to the chamber exhaust pipe through the outlet pipe 187 . It is different from the reaction chamber 120 shown in FIG. 2 in that it communicates with ( 105a of FIG. 12 ) and does not include a separate gas injection hole ( 121a of FIG. 2 ).
- the gas introduced through the inlet 122 by the plasma formed in the plasma reaction region A is decomposed to generate reactive active species.
- nitrogen trifluoride (NF 3 ) is introduced through the inlet 122
- nitrogen trifluoride (NF 3 ) is decomposed in the plasma reaction region (A) to react active species of excited fluorine atoms (F *) ) and fluorine (F 2 ).
- nitrogen trifluoride (NF 3 ) in the plasma reaction region (A) is nitrogen (N 2 ), fluorine (F 2 ), excited nitrogen atom (N * ), excited fluorine atom (F * ) and electrons (e ) can be decomposed into components containing
- oxygen (O 2 ) is introduced through the inlet 122 , oxygen (O 2 ) is decomposed in the plasma reaction region (A) to generate excited oxygen atoms (O * ) as reactive active species.
- the reactive active species generated in the plasma reaction region A is supplied to the chamber exhaust pipe (105a in FIG. 12 ) through the discharge pipe 187 .
- the method of operating the semiconductor manufacturing facility shown in FIG. 5 may be equally applied to the semiconductor manufacturing facility 200 shown in FIG. 12 . That is, in a state in which the ACL process is stopped, the excited oxygen atoms (O * ) generated in the plasma reactor 210 are supplied to the vacuum pump 106 to remove the hydrogenated amorphous carbon deposited in the vacuum pump 106, or Fluorine (F 2 ) generated in the plasma reactor 210 is supplied to the vacuum pump 106 to remove hydrocarbons (C X H Y ) deposited in the vacuum pump 106 .
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Abstract
Description
Claims (18)
- 비정질 탄소(Amorphous Carbon)가 증착되어서 비정질 탄소막(ACL)이 형성되는 ACL 공정이 수행되는 공정 챔버;상기 ACL 공정이 수행되는 과정에서 상기 공정 챔버에서 발생한 잔류가스를 상기 공정 챔버로부터 배출시키는 진공 펌프;상기 공정 챔버와 상기 진공 펌프를 연통시키는 챔버 배기관;플라즈마를 이용하여 플라즈마 반응 영역을 형성하는 플라즈마 반응기; 및상기 플라즈마 반응기로 처리 가스를 공급하는 가스 공급기를 포함하며,상기 잔류가스는 상기 공정 챔버로부터 배출되어서 상기 챔버 배기관을 따라 유동하여 배기가스를 형성하며,상기 처리 가스는 상기 플라즈마 반응 영역에서 플라즈마에 의해 분해되어서 반응 활성종을 형성하며,상기 반응 활성종은 상기 챔버 배기관에 공급되며,상기 처리 가스는 산소(O2) 또는 삼불화질소(NF3)인,반도체 제조설비.
- 청구항 1에 있어서,상기 처리 가스는 산소이며,상기 반응 활성종은 여기된 산소원자(O*)를 포함하는,반도체 제조설비.
- 청구항 2에 있어서,상기 여기된 산소원자(O*)는 상기 진공 펌프에 유입되어서 상기 진공 펌프에 증착된 수소화된 비정질 탄소와 반응하여 상기 수소화된 비정질 탄소를 산화시키는,반도체 제조설비.
- 청구항 3에 있어서,상기 가스 공급기는 상기 증착된 수소화된 비정질 탄소의 두께 감소율이 최대값을 갖도록 상기 플라즈마 반응기로 공급하는 산소 가스의 유량을 조절하는,반도체 제조설비.
- 청구항 2에 있어서,상기 여기된 산소원자(O*)는 상기 플라즈마 반응기와 상기 챔버 배기관을 연통시키는 배출관을 통해 상기 챔버 배기관으로 공급되는,반도체 제조설비.
- 청구항 2에 있어서,상기 플라즈마 반응기는 상기 챔버 배기관 상에 설치되며,상기 플라즈마 반응기는 상기 플라즈마 반응 영역에서 상기 배기가스에 포함된 수소화된 비정질 탄소(a-C:H)를 여기된 탄소원자(C*)와 여기된 수소원자(H*)로 분해하며,상기 여기된 탄소원자(C*)는 상기 여기된 산소원자(O*)와 반응하여 상기 진공 펌프로 유입되기 전에 이산화탄소 가스(CO2) 또는 일산화탄소 가스(CO)로 산화되며,상기 여기된 수소원자(H*)는 상기 여기된 산소원자(O*)와 반응하여 상기 진공 펌프로 유입되기 전에 수증기(H2O)로 산화되는,반도체 제조설비.
- 청구항 1에 있어서,상기 처리 가스는 삼불화질소이며,상기 반응 활성종은 여기된 불소원자(F*) 및 불소(F2)를 포함하는,반도체 제조설비.
- 청구항 7에 있어서,상기 불소(F2)는 상기 진공 펌프에 유입되어서 상기 진공 펌프에 증착된 탄화수소(CXHY)와 반응하여 사불화탄소(CF4)와 불산(HF)을 생성하는,반도체 제조설비.
- 청구항 7에 있어서,상기 여기된 불소원자(F*) 및 불소(F2)는 상기 플라즈마 반응기와 상기 챔버 배기관을 연통시키는 배출관을 통해 상기 챔버 배기관으로 공급되는,반도체 제조설비.
- 청구항 7에 있어서,상기 플라즈마 반응기는 상기 챔버 배기관 상에 설치되며,상기 플라즈마 반응기는 상기 플라즈마 반응 영역에서 상기 삼불화질소와 상기 배기가스에 포함된 탄화수소(CXHY)를 플라즈마 반응시켜서 사불화탄소(CF4), 불산(HF), 암모니아(NH3) 및 사이안화수소(HCN)을 생성하는,반도체 제조설비.
- 청구항 1에 있어서,상기 반응 활성종은 상기 플라즈마 반응기와 상기 챔버 배기관을 연통시키는 배출관을 통해 상기 챔버 배기관으로 공급되는,반도체 제조설비.
- 청구항 1에 있어서,상기 플라즈마 반응기는 상기 챔버 배기관 상에 설치되는,반드체 제조설비.
- 비정질 탄소(Amorphous Carbon)가 증착되어서 비정질 탄소막(ACL)이 형성되는 ACL 공정이 수행되는 공정 챔버와, 상기 ACL 공정이 수행되는 과정에서 상기 공정 챔버에서 발생한 잔류가스를 상기 공정 챔버로부터 배출시키는 진공 펌프와, 상기 공정 챔버와 상기 진공 펌프를 연통시키는 챔버 배기관과, 플라즈마를 이용하여 플라즈마 반응 영역을 형성하는 플라즈마 반응기와, 상기 플라즈마 반응기로 처리 가스를 공급하는 가스 공급기를 포함하는 반도체 제조설비의 운영방법으로서,상기 진공 펌프에 증착된 증착물을 제거하는 증착물 제거 단계를 포함하며,상기 증착물 제거 단계에서, 상기 가스 공급기에 의해 상기 플라즈마 반응기로 공급된 상기 처리 산소가 상기 플라즈마 반응 영역에서 분해되어서 반응 활성종을 생성하고, 상기 증착물이 상기 반응 활성종과 반응하여 제거되며,상기 처리 가스는 산소(O2) 또는 삼불화질소(NF3)인,반도체 제조설비의 운영방법.
- 청구항 13에 있어서,상기 처리 가스는 산소이고, 상기 반응 활성종은 여기된 산소원자(O*)를 포함하며,상기 증착물 제거 단계에서, 여기된 산소원자(O*)는 상기 진공 펌프에 유입되어서 상기 진공 펌프에 증착된 수소화된 비정질 탄소와 반응하여 상기 수소화된 비정질 탄소를 산화시키는,반도체 제조설비의 운영방법.
- 청구항 13에 있어서,상기 처리 가스는 삼불화질소(NF3)이고, 상기 반응 활성종은 여기된 불소원자(F*) 및 불소(F2)를 포함하며,상기 증착물 제거 단계에서, 여기된 불소(F2)는 상기 진공 펌프에 유입되어서 상기 진공 펌프에 증착된 탄화수소(CXHY)와 반응하여 사불화탄소(CF4)와 불산(HF)을 생성하는,반도체 제조설비의 운영방법.
- 비정질 탄소(Amorphous Carbon)가 증착되어서 비정질 탄소막(ACL)이 형성되는 ACL 공정이 수행되는 공정 챔버와, 진공 펌프와, 상기 공정 챔버와 상기 진공 펌프를 연통시키는 챔버 배기관과, 플라즈마를 이용하여 플라즈마 반응 영역을 형성하는 플라즈마 반응기와, 상기 플라즈마 반응기로 처리 가스를 공급하는 가스 공급기를 포함하는 반도체 제조설비의 운영방법으로서,진공 펌프를 가동하여 상기 상기 공정 챔버의 잔류가스를 배기가스로서 배출시키는 배기 단계; 및상기 배기 단계에 의해 상기 배기가스가 상기 챔버 배기관을 따라 유동하는 과정에서 상기 배기가스를 처리하는 가스 처리 단계를 포함하며,상기 가스 처리 단계에서, 상기 플라즈마 반응 영역에서 상기 처리 가스와 상기 배기가스의 플라즈마 반응이 이루어지며,반도체 제조설비의 운영방법.
- 청구항 16에 있어서,상기 처리 가스는 산소이고, 상기 반응 활성종은 여기된 산소원자(O*)를 포함하며,상기 가스 처리 단계에서, 상기 배기가스에 포함된 수소화된 비정질 탄소(a-C:H)가 분해되어서 여기된 탄소원자(C*)와 여기된 수소원자(H*)를 생성하며,상기 여기된 탄소원자(C*)는 상기 여기된 산소원자(O*)와 반응하여 상기 진공 펌프로 유입되기 전에 이산화탄소 가스(CO2) 또는 일산화탄소 가스(CO)로 산화되며,상기 여기된 수소원자(H*)는 상기 여기된 산소원자(O*)와 반응하여 상기 진공 펌프로 유입되기 전에 수증기(H2O)로 산화되는,반도체 제조설비의 운영방법.
- 청구항 16에 있어서,상기 처리 가스는 삼불화질소(NF3)이며,상기 가스 처리 단계에서, 상기 플라즈마 반응 영역에서 상기 삼불화질소와 상기 배기가스에 포함된 탄화수소(CXHY)가 반응하여 사불화탄소(CF4), 불산(HF), 암모니아(NH3) 및 사이안화수소(HCN)가 생성되는,반도체 제조설비의 운영방법.
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