WO2002058130A1 - Procede de production - Google Patents
Procede de production Download PDFInfo
- Publication number
- WO2002058130A1 WO2002058130A1 PCT/JP2002/000439 JP0200439W WO02058130A1 WO 2002058130 A1 WO2002058130 A1 WO 2002058130A1 JP 0200439 W JP0200439 W JP 0200439W WO 02058130 A1 WO02058130 A1 WO 02058130A1
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- WO
- WIPO (PCT)
- Prior art keywords
- film
- gas
- sio
- oxide film
- electronic device
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims description 60
- 239000000463 material Substances 0.000 title claims description 48
- 239000007789 gas Substances 0.000 claims abstract description 126
- 238000012545 processing Methods 0.000 claims abstract description 67
- 238000000034 method Methods 0.000 claims abstract description 60
- 239000004065 semiconductor Substances 0.000 claims abstract description 38
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 14
- 229920005591 polysilicon Polymers 0.000 claims abstract description 13
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 12
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 12
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims abstract description 11
- 150000004767 nitrides Chemical class 0.000 claims abstract description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 67
- 238000005121 nitriding Methods 0.000 claims description 40
- 239000000758 substrate Substances 0.000 claims description 34
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 26
- 238000000151 deposition Methods 0.000 claims description 23
- 230000008021 deposition Effects 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 18
- 230000015572 biosynthetic process Effects 0.000 claims description 16
- 229910052786 argon Inorganic materials 0.000 claims description 15
- 239000001307 helium Substances 0.000 claims description 8
- 229910052734 helium Inorganic materials 0.000 claims description 8
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 8
- 229910052743 krypton Inorganic materials 0.000 claims description 8
- 229910052756 noble gas Inorganic materials 0.000 claims description 7
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052710 silicon Inorganic materials 0.000 abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 239000010408 film Substances 0.000 description 226
- 235000012431 wafers Nutrition 0.000 description 31
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 13
- 239000010703 silicon Substances 0.000 description 13
- 238000012546 transfer Methods 0.000 description 12
- 238000011282 treatment Methods 0.000 description 12
- 230000007246 mechanism Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 150000002831 nitrogen free-radicals Chemical class 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 230000001678 irradiating effect Effects 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 150000002835 noble gases Chemical class 0.000 description 2
- 238000009832 plasma treatment Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- AANMVENRNJYEMK-UHFFFAOYSA-N 4-propan-2-ylcyclohex-2-en-1-one Chemical compound CC(C)C1CCC(=O)C=C1 AANMVENRNJYEMK-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
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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
- C23C16/45563—Gas nozzles
- C23C16/45565—Shower nozzles
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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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
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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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/34—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
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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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
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- 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
- H01L21/02126—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 containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC
- H01L21/0214—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 containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC the material being a silicon oxynitride, e.g. SiON or SiON:H
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- 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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- 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
- H01L21/02164—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 oxide, e.g. SiO2
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- 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
- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/0223—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate
- H01L21/02233—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer
- H01L21/02236—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor
- H01L21/02238—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor silicon in uncombined form, i.e. pure silicon
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- 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
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02318—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment
- H01L21/02321—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment introduction of substances into an already existing insulating layer
- H01L21/02329—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment introduction of substances into an already existing insulating layer introduction of nitrogen
- H01L21/02332—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment introduction of substances into an already existing insulating layer introduction of nitrogen into an oxide layer, e.g. changing SiO to SiON
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02318—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment
- H01L21/02337—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment treatment by exposure to a gas or vapour
- H01L21/0234—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment treatment by exposure to a gas or vapour treatment by exposure to a plasma
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- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28194—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation by deposition, e.g. evaporation, ALD, CVD, sputtering, laser deposition
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- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28202—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation in a nitrogen-containing ambient, e.g. nitride deposition, growth, oxynitridation, NH3 nitridation, N2O oxidation, thermal nitridation, RTN, plasma nitridation, RPN
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- 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
- H01L21/3143—Inorganic layers composed of alternated layers or of mixtures of nitrides and oxides or of oxinitrides, e.g. formation of oxinitride by oxidation of nitride layers
- H01L21/3144—Inorganic layers composed of alternated layers or of mixtures of nitrides and oxides or of oxinitrides, e.g. formation of oxinitride by oxidation of nitride layers on silicon
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- 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
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
- H01L21/3165—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation
- H01L21/31654—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself
- H01L21/31658—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself by thermal oxidation, e.g. of SiGe
- H01L21/31662—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself by thermal oxidation, e.g. of SiGe of silicon in uncombined form
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- 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
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- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/32055—Deposition of semiconductive layers, e.g. poly - or amorphous silicon layers
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- 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
- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/02252—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by plasma treatment, e.g. plasma oxidation of the substrate
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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
- H01L21/04—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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
- H01L21/2807—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being Si or Ge or C and their alloys except Si
Definitions
- the present invention relates to a method that can be suitably used for producing an electronic deposition material.
- the method for producing an electronic device material of the present invention can be suitably used, for example, for forming a semiconductor or a semiconductor device (for example, having a MOS semiconductor structure) material.
- the manufacturing method of the present invention is generally widely applicable to the manufacture of electronic devices such as semiconductors, semiconductor devices, and liquid crystal devices, for convenience of explanation, the background art of semiconductor devices will be described below. An example will be described.
- SiO 2 films thin and high-quality silicon oxide films
- MOS semiconductor structure which is the most popular semiconductor device structure, according to the so-called scale glue / layer, an extremely thin (for example, about 2.5 nm or less) and high quality gate insulating film (SiO 2) is used. Needs for membranes) are becoming extremely high.
- a silicon substrate obtained by directly oxidizing a silicon substrate using a high-temperature heating furnace at about 850 ° C. to 100 ° C. oxide film (S i 0 2 film) has been used industrially.
- plasma nitridation generally tends to provide a high-quality gate oxynitride film having a low interface state and a high nitrogen content (several percent) on the oxide film surface.
- plasma nitridation generally tends to provide a high-quality gate oxynitride film having a low interface state and a high nitrogen content (several percent) on the oxide film surface.
- plasma when plasma is used, there is an advantage that nitriding at a low temperature is easy.
- a high temperature of 100 ° C. or more is required to nitride the SiO 2 film by heating.
- the characteristics tend to deteriorate (such methods are disclosed in Japanese Patent Application Laid-Open Nos. 55-34937 and 59-509). .
- An object of the present invention is to provide a method for manufacturing an electronic device material that can solve the above-described problems in the related art.
- another object of the present invention is to provide a method capable of manufacturing an electronic device structure which is extremely thin (for example, a film thickness of 2.5 nm or less) and has a high-quality oxide film and / or oxynitride film. It is in.
- Another object of the present invention is to manufacture an electronic device material that is extremely thin (for example, a film thickness of 2.5 nm or less) and that can form a MOS semiconductor structure having a high-quality gate oxide film and Z or oxynitride film. It is to provide a method.
- the method of manufacturing an electronic device material of the present invention, 0 to 2 and a rare gas in the presence of small rather than the process gas also contains, using plasma based on microwave irradiation via a plane ⁇ antenna member having a plurality of scan Li Tsu DOO
- an oxide film SiO 2 film is formed on the surface of the substrate to be processed containing Si as a main component.
- a plasma based on microphone mouth wave irradiation through a planar antenna member having a plurality of slits is used to generate Si Forming a base oxide film (SiO 2 film) on the surface of the substrate to be processed, the main component of which is:
- the surface of the underlayer SiO 2 film is formed by using a nitriding plasma based on microphone mouth wave irradiation through a planar antenna member having a plurality of slits.
- a method for producing an electronic deposition material comprising the steps of: According to the present invention, further in the presence of a process gas also includes a less o 2 and a rare gas, by using plasma based on microwave irradiation via a plane antenna member having a plurality of scan Li dot and S i Forming a base oxide film (SiO 2 film) on the surface of the substrate to be treated as a main component;
- the surface of the underlayer SiO 2 film is formed using a nitriding plasma based on microwave irradiation through a planar antenna member having a plurality of slits.
- FIG. 1 is a schematic vertical sectional view showing an example of a semiconductor device that can be manufactured by the method for manufacturing an electronic deposition material of the present invention.
- FIG. 2 is a schematic plan view showing an example of a semiconductor manufacturing apparatus for performing the method for manufacturing an electronic deposition material according to the present invention.
- FIG. 3 is a schematic view showing an example of a slit plane antenna (hereinafter, abbreviated as “SPA”) plasma processing unit that can be used in the method for producing an electronic device material of the present invention.
- SPA slit plane antenna
- FIG. 4 is a schematic plan view showing an example of an SPA that can be used in the electronic device material manufacturing apparatus of the present invention.
- FIG. 5 shows a heating method usable in the method for producing an electronic deposition material according to the present invention.
- FIG. 2 is a schematic vertical sectional view showing an example of a reactor unit.
- FIG. 6 is a flowchart showing an example of each step in the production method of the present invention.
- FIG. 7 is a schematic sectional view showing an example of film formation by the method of the present invention.
- FIG. 8 is a graph showing the leakage characteristics of the MOS semiconductor structure obtained by the method of the present invention.
- FIG. 9 is a graph showing good leak current characteristics obtained by the method of the present invention.
- FIG. 10 is a graph showing the results of SIMS analysis of the oxynitride film obtained by the method of the present invention.
- W Wafer (substrate to be processed), 60—SPA (planar antenna member), 2: oxide film, 2a: nitrogen-containing layer, 32: plasma processing unit (process chamber), 33: plasma processing unit (Process chamber), 47 ... heating reactor.
- a processing gas containing at least O 2 and a rare gas or a processing gas atmosphere; hereinafter the same.
- a processing gas containing at least O 2 and a rare gas or a processing gas atmosphere; hereinafter the same.
- a processing gas atmosphere or a processing gas atmosphere
- the substrate to be treated that can be used in the present invention is not particularly limited as long as it contains Si as a main component.
- a known substrate for electronic deposition such as silicon (single-crystal silicon) or glass is preferably used. can do.
- the processing gas when forming an oxide film, is at least o
- the rare gas that can be used at this time is not particularly limited, and may be appropriately selected from known rare gases (or a combination of two or more thereof) and used. From the viewpoint of film quality, it is possible to suitably use, as a rare gas, crypton, argon, or helium.
- the following conditions can be suitably used in view of the characteristics of the oxide film to be formed.
- O2 5 to 500 scm, more preferably 50 to 500 scm,
- Noble gases eg, Kr, Ar, or He: 500-300 sccm, more preferably 500-200 seem, particularly preferred 100-000 seem 2 0 0 0 sccm
- Temperature room temperature (25 ° C) to 700 ° C, more preferably 200 ° to 700 ° C, particularly preferably 200 ° to 500 ° C
- Pressure 200 to 500 mTorr, more preferably 500 to 300 mTorr, particularly preferably 100 to 200 mTorr
- Microwave 0.5 to 5 W / cm 2 , more preferably 0.5-4 W / cm 2
- a preferred example of process gas O 2 at a flow rate of 500-500 sccm, and a gas containing 500,000-200 sccm of crypt, argon or helium. .
- a preferred example of the temperature at the time of forming the SiO 2 film a temperature of 300 to 700 ° C.
- a preferred example of the pressure for forming the SiO 2 film is 2.7 to 27 Pa (20 to 200 mTorr).
- a plasma formed with an output of 1 to 4 WZ cm 2 As a preferable example of the plasma at the time of forming the SiO 2 film, a plasma formed with an output of 1 to 4 WZ cm 2 .
- the SiO 2 oxide film can be suitably nitrided by using a nitriding plasma based on the irradiation of a microwave through a planar antenna member. S i O to be nitrided at this time
- the oxide film is not particularly limited.However, from the viewpoint of film quality and productivity, using plasma based on irradiation of a microwave by a microwave through a planar antenna member in the presence of o 2 and a processing gas containing a rare gas, It is preferably a base oxide film (SiO 2 film) formed on the surface of the substrate to be processed, which contains Si as a main component.
- a plasma containing Si as a main component is used by using a plasma based on microwave irradiation through a planar antenna member in the presence of a processing gas containing O 2 and a rare gas.
- a base oxide film (SiO 2 film) is formed on the surface of the processing substrate, and then a plasma based on microwave irradiation through a planar antenna member in the presence of a processing gas containing at least N 2 and a rare gas is used.
- the surface of the base Sio 2 film can be nitrided.
- the gas contains at least N 2 and a noble gas.
- the rare gas that can be used at this time is not particularly limited, and can be appropriately selected from known rare gases (or a combination of two or more thereof). From the viewpoint of film quality, krypton, argon, or helium can be suitably used as the noble gas.
- the following nitriding conditions can be suitably used in view of the characteristics of the surface nitrided oxide film to be formed.
- N 2 2 to 500 sccm, more preferably 4 to 200 sccm
- Noble gas eg, Kr, Ar, or He
- 200 to 200 sccm more preferably 500-200 seem, especially preferred 100-200 sccm
- H 2 1 to: I 100 sccm, more preferably 2 to 50 sccm, particularly preferably 5 to 30 sccm
- Temperature room temperature (25 ° C) to 700 ° C, more preferably 200 ° to 500 ° C
- Pressure 10 to 300 mT or r, more preferably 20 to 100 m T or r, particularly preferably 50 to 1 O O O mT or r
- Microwave 0.5-4 W / cm 2 , more preferably 0.5-3 W / cm 2
- the following conditions can be mentioned as preferable examples from the viewpoint of the characteristics of the oxide film having a surface nitride to be formed.
- a preferred example of the processing gas when nitriding the SiO 2 film N 2 at a flow rate of 4 to 200 sccm, and a script at a flow rate of 500 to 200 sccm Gas containing nitrogen, argon or helium; or N 2 at a flow rate of 4 to 20 Osccm, a script of a flow rate of 500 to 2000 seem, argon or helium, and a flow rate . 2 to 3 0 sccm gas containing H 2 of.
- a preferred example of the temperature at the time of nitriding the SiO 2 film room temperature to 700 ° C.
- a preferred example of the pressure during nitriding of the SiO 2 film is 2.7 to 135 Pa (20 to 1 OOO mTorr).
- a plasma formed with an output of 0.5 to 3 W / cm 2 As a preferable example of the plasma at the time of nitriding the SiO 2 film, a plasma formed with an output of 0.5 to 3 W / cm 2 .
- an electrode layer can be formed on the SiO 2 film or the SiO ON film as necessary.
- an electrode layer made of polysilicon, amorphous silicon, or SiGe can be suitably used from the viewpoint of device characteristics.
- the underlying SiO 2 film or SiO ON film used at this time is not particularly limited, but from the viewpoint of the deposition characteristics and the productivity, the planar antenna member is required in the presence of a processing gas containing at least O 2 and a rare gas.
- the surface of the underlayer SiO 2 film is formed by using a nitriding plasma based on microphone mouth wave irradiation through a planar antenna member having a plurality of slits.
- a substrate to be treated provided with the SiO 2 film or the surface-nitrided underlying SiO 2 film is heated in the presence of a layer-forming gas to form the SiO 2 film or Si
- An electrode layer (for example, an electrode layer made of polysilicon, amorphous silicon, or SiGe) can be formed on the ON film.
- the electrode forming gas that can be used in the present invention is not particularly limited, and may be appropriately selected from any of known electrode forming gases or a combination of two or more thereof depending on the material of the electrode layer to be formed. Can be used.
- the electrode-forming gas is S i H 4.
- suitable electrode forming conditions are as follows: pressure: 20.0 to 40 Pa (150 to 300 mTorr), more preferably 26 to 33 3 Pa (200-250 mTorr) Temperature: 570-650 ° C, more preferably 600-630 ° C
- the electrode to be formed is amorphous silicon.
- the electrode-forming gas is S i H 4.
- suitable electrode forming conditions are as follows: C i3 ⁇ 4> -S?
- the electrode forming gas is GeH 4 / SiH 4 .
- a microwave having a low electron temperature and a high density is formed by irradiating a microwave through a planar antenna member having a plurality of slits, and the surface of the substrate to be processed is oxidized using the plasma. (If necessary, nitriding). Therefore, a process with low plasma damage and high reactivity at low temperature is possible.
- the present invention relates to a microwave plasma apparatus having a planar antenna having such a large number of slits, having a low electron temperature, low plasma damage, and capable of generating high-density plasma.
- a microwave plasma apparatus having a planar antenna having such a large number of slits, having a low electron temperature, low plasma damage, and capable of generating high-density plasma.
- the new plasma device equipped with this planar antenna has the ability to supply high-density radicals even at temperatures between room temperature and about 700 ° C, so that it is possible to suppress the degradation of the depiice characteristics due to heating. In addition, it is considered that a process having high reactivity can be performed even at a low temperature.
- an extremely thin film thickness and a high quality oxide film or oxynitride film for example,
- oxide and oxynitride films with the characteristics required for the next generation MOS semiconductor structure have not yet been obtained.
- what is required for the next generation MOS semiconductor structure is a MOS semiconductor structure having an oxide film or an oxynitride film having a thickness of 2.5 nm or less.
- a MOS semiconductor structure using polysilicon, amorphous silicon, SiGe, or the like as the gate electrode is preferable.
- a method of manufacturing a semiconductor structure including an extremely thin and high-quality oxide film or oxynitride film has not been found in the past.
- the characteristics of the plasma that can be suitably used in the present invention are as follows.
- a thin oxide film and a high-quality oxide film or Z or oxynitride film can be formed. Therefore, by forming another layer (for example, an electrode layer) on this oxide film and / or oxynitride film, it becomes easy to form a structure of a semiconductor device having excellent characteristics. .
- an oxide film and / or an oxynitride film having a very small thickness for example, a film thickness of 2.5 nm or less.
- a very small thickness for example, a film thickness of 2.5 nm or less.
- an oxide film having suitable characteristics as described below can be easily produced.
- Figure 10 shows the results of SIMS analysis of the oxide film subjected to SPA nitridation. Nitriding treatment was applied to the underlying oxide film of 15A for 8 seconds and 25 seconds. As shown in the figure, the surface contains a high concentration of nitrogen, which makes it possible to perform nitriding while avoiding deterioration of device characteristics due to contamination of the interface with nitrogen.
- the range to which the method of the present invention can be applied is not particularly limited. It can be particularly suitably used as a gate insulating film having a structure.
- a MIS semiconductor structure having suitable characteristics as described below.
- evaluating the characteristics of the oxide film and the Z or oxynitride film formed according to the present invention for example, see the literature (Applied Physics Vol. 69, No. 9 (2000) PP 10 49 to: By forming a standard MOS semiconductor structure as described in L059) and evaluating the characteristics of the MOS, the oxide film and Z or acid This can be replaced with the evaluation of the characteristics of the nitride film itself. This is because, in such a standard MOS structure, the characteristics of the oxide film and / or the oxynitride film forming the structure strongly influence the MIS characteristics.
- FIG. 1A reference numeral 1 in FIG. 1A denotes a silicon substrate, 11 denotes a field oxide film, 2 denotes a gate insulating film, and 13 denotes a gate electrode.
- the gate insulating film 2 is formed of a high-quality insulating film formed at the interface with the silicon substrate 1. For example, it is composed of an oxide film 2 having a thickness of about 2.5 nm.
- a high oxide film 2 of this quality, 0 2 and inert gas in the presence of including the processing gas, the substrate to be processed whose main component is S i, the planar antenna having a plurality of scan Li Tsu DOO A plasma is formed by irradiating a microphone mouth wave through a member, and a silicon oxide film (hereinafter, referred to as “SiO 2 film”) formed on the surface of the substrate to be processed using the plasma.
- SiO 2 film silicon oxide film
- the surface of the silicon oxide film 2 may be subjected to a nitriding treatment as necessary.
- a gate electrode 13 mainly containing silicon (polysilicon or amorphous silicon) is formed.
- FIG. 2 is a schematic view (schematic plan view) showing an example of the entire configuration of a semiconductor manufacturing apparatus 30 for implementing the method for manufacturing an electronic deposition material of the present invention.
- a transfer chamber 31 for transferring the wafer W (FIG. 3) is provided substantially at the center of the semiconductor manufacturing apparatus 30, and the transfer chamber 31 is provided in the transfer chamber 31.
- a heating unit 36 for performing various heating operations and a heating reactor 47 for performing various heating processes on the wafer are provided.
- the heating reactor 47 may be provided separately and independently from the semiconductor manufacturing apparatus 30.
- a pre-cooling unit 45 and a cooling unit 46 for performing various types of pre-cooling and non-pre-cooling operations are provided beside the load port cut units 34 and 35, respectively.
- Transfer arms 37 and 38 are arranged inside the transfer chamber 31, and can transfer the wafer W (FIG. 3) to and from each of the units 32 to 36.
- a loader is located on the near side in the drawing of the load ports 34 and 35.
- One arm 41 and 42 are provided. These loader arms 4 1 and 4 2 move wafers W in and out of the 4 cassettes 4 4 set on the cassette stage 4 3 arranged further in front of them. Can be.
- both the plasma processing units 32 and 33 can be replaced with single-chamber type CVD processing units, and one unit is provided at the position of the plasma processing units 32 and 33.
- a method may be used in which a SiO 2 film is formed in the processing unit 32 and then the surface of the SiO 2 film is nitrided in the processing unit 33.
- the SiO 2 film formation and the surface nitriding of the SiO 2 film may be performed in parallel.
- surface nitriding can be performed in parallel by the processing units 32 and 33.
- FIG. 3 is a schematic cross-sectional view in the vertical direction of a plasma processing unit 32 (33) that can be used for forming the gated green film 2.
- reference numeral 50 denotes a vacuum vessel formed of, for example, aluminum.
- An opening 51 larger than the substrate (eg, wafer W) is formed on the upper surface of the vacuum vessel 50, and a dielectric such as quartz-aluminum nitride is used so as to close the opening 51.
- a flat cylindrical top plate 54 made of a body is provided on the lower side wall of the top plate 54.
- gas supply pipes 72 are provided at 16 positions evenly arranged along the circumferential direction.
- the processing gas containing at least one selected from the group consisting of O 2 , a rare gas, N 2, and H 2 is supplied from the gas supply pipe 72 near the plasma region P of the vacuum vessel 50.
- a flat antenna member having a plurality of slits for example, a slit plane antenna (Slit Plane Antenna;
- a waveguide 63 connected to a microwave power supply 61 that forms a high-frequency power supply through, for example, a SPA) 60 and generates, for example, 2.45 GHz microwaves is provided.
- the waveguide 63 includes a flat circular waveguide 63 A having a lower edge connected to the SPA 60 and a cylindrical waveguide 63 having one end connected to the upper surface of the circular waveguide 63 A.
- 3B a coaxial waveguide converter 63C connected to the upper surface of the cylindrical waveguide 63B, and one end connected at right angles to the side surface of the coaxial waveguide converter 63C.
- the other end is configured by combining with a rectangular waveguide 63 D connected to the microphone mouth power supply 61.
- the UHF and the microwave are referred to as a high frequency region.
- the high-frequency power supplied from the high-frequency power supply unit is not less than 300 MHz and not more than 250 MHz, including UHF of 30 OMHz or more and microwaves of 1 GHz or more.
- the plasma generated by this high-frequency power is called high-frequency plasma.
- one end of the shaft portion 62 made of a conductive material is connected to substantially the center of the upper surface of the SPA 60, and the other end is connected to the cylindrical waveguide 63.
- the coaxial waveguide is provided so as to be connected to the upper surface of B, whereby the waveguide 63 B is configured as a coaxial waveguide.
- An installation table 52 is provided.
- the mounting table 52 has a built-in temperature controller (not shown), so that the mounting table 52 functions as a hot plate.
- one end of an exhaust pipe 53 is connected to the bottom of the vacuum vessel 50, and the other end of the exhaust pipe 53 is connected to a vacuum pump 55.
- FIG. 4 is a schematic plan view showing an example of SP A60 that can be used in the electronic deposition material manufacturing apparatus of the present invention.
- each slot 60a is a substantially rectangular through groove, and adjacent slots are arranged so as to be orthogonal to each other to form a letter "T" in a substantially alphabetic shape.
- the length and arrangement interval of the slots 60a are determined according to the wavelength of the microphone mouth wave generated by the microwave power supply unit 61.
- FIG. 5 is a schematic cross-sectional view in the vertical direction showing an example of a heating reaction furnace 47 that can be used in the apparatus for manufacturing an electronic deposition material of the present invention.
- the processing chamber 82 of the heating reaction furnace 47 is formed in an airtight structure by, for example, an aluminum.
- the processing chamber 82 is provided with a heating mechanism and a cooling mechanism.
- a gas introduction pipe 83 for introducing gas is connected to the center of the upper part of the processing chamber 82, and the inside of the processing chamber 82 and the inside of the gas introduction pipe 83 are communicated.
- the gas introduction pipe 83 is connected to a gas supply source 84. Then, gas is supplied from the gas supply source 84 to the gas introduction pipe 83, and the gas is introduced into the processing chamber 82 via the gas introduction pipe 83.
- gases electrode forming gas
- silane which can be used as a material for forming a gate electrode
- an inert gas is used as a carrier gas. You can also.
- a gas exhaust pipe 85 for exhausting gas in the processing chamber 82 is connected to a lower portion of the processing chamber 82, and the gas exhaust pipe 85 is connected to an exhaust means (not shown) including a vacuum pump or the like. ing.
- the gas in the processing chamber 82 is exhausted from the gas exhaust pipe 85, and the inside of the processing chamber 82 is set to a desired pressure.
- a mounting table 87 for mounting the wafer W is disposed below the processing chamber 82.
- the wafer W is mounted on the mounting table 87 by an electrostatic chuck (not shown) having substantially the same diameter as the wafer W.
- the mounting table 87 has a heat source means (not shown) provided therein, and is formed in a structure that can adjust the processing surface of the wafer W mounted on the mounting table 87 to a desired temperature.
- the mounting table 87 has a mechanism that can rotate the mounted wafer W as necessary.
- an opening 82 a for taking in and out the wafer W is provided on the wall of the processing chamber 82 on the right side of the mounting table 87, and the opening and closing of the opening 82 a is performed by opening and closing a gate valve 98. Is performed by moving the vertical direction in the figure.
- a transfer arm (not shown) for transferring the wafer W is provided adjacent to the right side of the gate pulp 98, and the transfer arm enters and exits the processing chamber 82 through the opening 82a. Then, the wafer W is placed on the mounting table 87 and the processed wafer W is unloaded from the processing chamber 82.
- a shower head 88 as a shower member is provided above the mounting table 87.
- This shared head 8 8 is connected to the stand 8 7 It is formed so as to divide the space between it and the introduction pipe 83, and is made of, for example, aluminum or the like.
- the shower head 88 is formed so that the gas outlet 83a of the gas inlet pipe 83 is located at the center of the upper part, and passes through the gas supply hole 89 provided at the lower part of the shower head 88. However, gas is introduced into the processing chamber 82, and the gas is introduced.
- FIG. 6 is a flowchart showing an example of the flow of each step in the method of the present invention.
- a field oxide film 11 (FIG. 1A) is formed on the surface of wafer W in a previous step.
- the wafer W on which the field oxide film 11 is formed is placed on the mounting table 52 (FIG. 3).
- the gate pulp is closed to seal the inside, and then the inside atmosphere is evacuated by a vacuum pump 55 through an exhaust pipe 53 to evacuate to a predetermined degree of vacuum and maintain a predetermined pressure.
- a microwave of, for example, 1.8 GHz (2200 W) is generated from the microphone mouth-wave power supply unit 61, and the microwave is guided by the waveguide to cause the SPA 60 and the top plate 54 to pass therethrough. Then, the high-frequency plasma is generated in the upper plasma region P in the vacuum vessel 50.
- the microwave is transmitted in the rectangular waveguide 63D in the rectangular mode, converted from the rectangular mode to the circular mode by the coaxial waveguide converter 63C, and the cylindrical coaxial waveguide is transmitted in the circular mode.
- Tube 6 3 B is transmitted, and circular waveguide 6
- the light is transmitted while being spread at 3 A, radiated from the slot 60 a of the SPA 60, transmitted through the top plate 54, and introduced into the vacuum vessel 50.
- high-density plasma is generated due to the use of microwaves, and high-density plasma is generated because the microwaves are radiated from many slots 60a of SPA 60.
- the gas supply pipe 72 is used to dilute the processing gas for forming an oxide film such as krypton or argon.
- the first step formation of an oxide film
- the first step is performed by introducing a gas and an O 2 gas at a flow rate of 100 sccm and 20 sccm, respectively.
- the introduced processing gas is activated (plasmaized) by the plasma flow generated in the plasma processing unit 32, and the plasma is used to generate a silicon gas as shown in the schematic cross-sectional view of FIG. 7A.
- the surface of the substrate 1 is oxidized to form an oxide film (SiO 2 film) 2.
- this oxidation treatment is performed, for example, for 40 seconds, so that a 2.5 nm-thick gate oxide film or a base oxide film (base SiO 2 film) 2 for a gut oxynitride film can be formed.
- the gate valve (not shown) is opened, and the transfer arms 37 and 38 (FIG. 2) enter the vacuum vessel 50 to receive the wafer W on the mounting table 52.
- the transfer arms 37 and 38 take out the wafer W from the plasma processing unit 32, they are set on a mounting table in the adjacent plasma processing unit 33 (step 2). Further, depending on the application, the gate oxide film may be moved to the thermal reactor 47 without nitriding.
- a surface nitriding treatment is performed on the wafer W, and a nitride-containing layer 2a (see FIG. 4 ) is formed on the surface of the base oxide film (base SiO 2 ) 2 formed earlier. 7 B) is formed.
- the wafer temperature is, for example, 400 ° C.
- the process pressure is, for example, 66.7 Pa (5
- argon gas and N 2 gas are introduced into the container 50 from the gas introduction pipe at a flow rate of 100 seem and 20 sccm, respectively.
- a microphone mouth wave power of, for example, 2 W / cm 2 is generated from the microphone mouth wave power supply unit 61, and this microwave is guided by the waveguide and passed through the SPA 60 b and the top plate 54. Then, the high-frequency plasma is generated in the upper plasma region P in the vacuum vessel 50.
- a nitrogen-containing layer 2a is formed on the surface of the base oxide film (underlying SiO 2 film) 2 on the wafer W.
- a gut oxynitride film (SiON film) having a thickness of about 2 nm can be formed.
- a gate electrode 13 (FIG. 1A) is formed on the SiO 2 film on the wafer W or on the SiO 2 film obtained by nitriding the underlying SiO 2 film.
- the wafer W on which the gate oxide film or the gate oxynitride film is formed is taken out of the plasma processing unit 32 or 33, respectively, and the transfer chamber 31 (FIG. 2) Once, and then housed in a heating reactor 47 (step 4).
- the heating reaction furnace 47 the wafer W is heated under predetermined processing conditions, and a predetermined good electrode 13 is formed on the gate oxide film or the good oxynitride film.
- processing conditions are selected according to the type of the gate electrode 13 to be formed. You can choose.
- SiH 4 is used as a processing gas (electrode forming gas), and the range of 20.0 to 33.3 Pa (150 to The treatment is carried out under a pressure of 250 mTorr or 570 to 63 ° C.
- the gate electrode 1 3 consisting Amorufasushiri Con as the process gas (electrode-forming gas), using the S i H 4, 2 0. 0 ⁇ 6 6. 7 P a (1 The treatment is performed under a pressure of 50 to 500 mT orr) and a temperature of 52 to 570 ° C.
- the treatment is performed under a pressure of ⁇ 60 Pa and a temperature of 460 ⁇ 560 ° C.
- a plurality of slits are formed on a wafer w containing Si as a main component in the presence of a processing gas.
- a microwave containing oxygen (O 2 ) and a rare gas is formed by irradiating a microwave through a planar antenna member (SPA) having the same, and an oxide film is formed on the surface of the substrate to be processed using the plasma.
- SPA planar antenna member
- the quality of the oxide film in the first step is high as shown in the graph of FIG.
- FIG. 8 shows the leak characteristics of the M0S type semiconductor structure formed on the silicon wafer W by the method for manufacturing an electron deposition material according to the above-described embodiment.
- the vertical axis of this graph shows the value of the leak current
- the horizontal axis shows the electrical film thickness (converted film thickness).
- the solid line graph 1 shows the leakage characteristics of the thermal oxide film (DryOx) formed by the conventional thermal oxidation method (Dry thermal oxidation method) for reference
- the graph 0 shows 0 2 shows the leakage characteristics of an oxide film (SPAOx) obtained by plasma treatment using SPA in the presence of argon as a rare gas.
- the oxide film formed by the method for manufacturing an electronic device material of the present invention is compared with the leak characteristic of the thermal oxide film formed by the conventional thermal oxidation method. Has a low leak value. Therefore, by using the oxide film formed according to the present invention, low power consumption can be realized and good device characteristics can be obtained.
- an oxide film for example, a gate oxide film having higher quality than a thermal oxide film and having a lower interface state can be obtained.
- the reason why the quality of the oxide film formed by the above-described method is high is estimated as follows. That is, plasma formed by irradiating the processing gas with microwaves using the SPA is formed as plasma having a relatively low electron temperature. Therefore, the bias between the plasma and the surface of the substrate to be processed is suppressed to a relatively low value, and the plasma damage is small. Therefore, it is considered that an SiO 2 film having good interface characteristics is formed as shown in FIG.
- the oxynitride film obtained by performing the surface nitriding treatment in the second step has excellent quality. The reason is presumed as follows according to the knowledge of the present inventors.
- Nitrogen radicals generated on the oxide film surface by the above SPA have high density. Is possible. Also, compared to the generation of nitrogen radicals by heat, high-density nitrogen radicals can be generated even at a low temperature (about room temperature), and it is possible to suppress deterioration of device characteristics due to heat typified by diffusion of dopants. Furthermore, since nitrogen in the film is contained on the surface of the oxide film, it is possible to improve the dielectric constant without deteriorating the interface characteristics and to exhibit performance such as an effect of preventing penetration of boron. .
- the MOS semiconductor structure has excellent characteristics. According to the knowledge of the present inventors, the reason is presumed as follows.
- an extremely thin and high-quality good insulating film can be formed.
- Such a high-quality gate insulating film gate oxide film and Z or gate oxynitride film
- a gate electrode formed on it for example, polysilicon, amorphous silicon, SiGe by CVD
- good transistor characteristics for example, good leak characteristics.
- the processing unit shown in FIG. 2 by using the plasma as shown in FIG. 2 on the n-type silicon substrate on which the element isolation has been formed using SPA plasma. Then, a 1.8 nm underlying SiO 2 film was formed. Total thickness is 1.8 nm (equivalent oxide thickness) It is.
- a P-type polysilicon gate electrode was formed, and the equivalent film thickness was determined from the CV characteristics.
- the equivalent film thickness was reduced to about 1.4 nm, and the uniformity of the film thickness was as good as 4% at 3 sigma.
- the vertical axis in Fig. 9 shows the leakage current characteristics
- the horizontal axis shows the electrical film thickness (converted film thickness).
- Graph 1 indicated by a straight line indicates the leakage characteristics of a standard thermal oxide film
- graph ⁇ ⁇ indicated by a point indicates the leakage characteristics of a film subjected to nitridation after SPA oxidation.
- Graph II a decrease in the equivalent film thickness was observed as the nitriding time increased.
- the leakage current was reduced by up to an order of magnitude compared to the standard thermal oxide film.
- a high-performance MIS type semiconductor structure having good electric characteristics can be formed with a throughput that can be applied industrially.
- a planar antenna member having a plurality of slits (a so-called SPA antenna) is formed on a substrate to be processed mainly containing Si in the presence of a processing gas. Irradiation of microwaves through the In order to form an oxide film (SiO 2 film) by supplying a mask, suitable characteristics control of the interface between the silicon-containing substrate and the oxide film (SiO 2 film) formed on the surface is performed. It can be carried out.
- the electronic device manufacturing method of another aspect according to the present invention by using a method of performing nitriding treatment on the formation of the underlying oxide film (S i ⁇ 2 film) by a method using a so-called SPA antenna, High quality oxynitride film (SiON film) can be formed.
- an electrode layer for example, a gate electrode made of polysilicon or amorphous silicon or SiGe
- a semiconductor structure having good electric characteristics for example, a MOS type semiconductor structure
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Priority Applications (7)
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JP2002558321A JP3916565B2 (ja) | 2001-01-22 | 2002-01-22 | 電子デバイス材料の製造方法 |
CNB028039912A CN100477113C (zh) | 2001-01-22 | 2002-01-22 | 电子器件材料的制造方法 |
KR1020067008751A KR100746120B1 (ko) | 2001-01-22 | 2002-01-22 | 반도체 디바이스의 제조 방법, 플라즈마 처리 방법, 및게이트 절연막 형성 방법 |
KR1020037009626A KR100837707B1 (ko) | 2001-01-22 | 2002-01-22 | 전자 디바이스 재료의 제조 방법, 플라즈마 처리 방법, 및 산질화막 형성 시스템 |
EP02715873A EP1361605A4 (en) | 2001-01-22 | 2002-01-22 | METHOD FOR PRODUCING MATERIAL OF AN ELECTRONIC COMPONENT |
US10/466,872 US20040142577A1 (en) | 2001-01-22 | 2002-01-22 | Method for producing material of electronic device |
US11/153,551 US20050233599A1 (en) | 2001-01-22 | 2005-06-16 | Method for producing material of electronic device |
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JP (3) | JP3916565B2 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
JPWO2002058130A1 (ja) | 2004-05-27 |
KR20070116696A (ko) | 2007-12-10 |
US20040142577A1 (en) | 2004-07-22 |
JP4401375B2 (ja) | 2010-01-20 |
CN1860596A (zh) | 2006-11-08 |
JP3916565B2 (ja) | 2007-05-16 |
CN101399198A (zh) | 2009-04-01 |
KR20090053965A (ko) | 2009-05-28 |
CN100477113C (zh) | 2009-04-08 |
KR100837707B1 (ko) | 2008-06-13 |
EP1361605A4 (en) | 2006-02-15 |
JP2010050462A (ja) | 2010-03-04 |
JP2007013200A (ja) | 2007-01-18 |
JP4926219B2 (ja) | 2012-05-09 |
KR20060061404A (ko) | 2006-06-07 |
KR100994387B1 (ko) | 2010-11-16 |
US20050233599A1 (en) | 2005-10-20 |
US20070224837A1 (en) | 2007-09-27 |
KR100746120B1 (ko) | 2007-08-13 |
KR20030070126A (ko) | 2003-08-27 |
EP1361605A1 (en) | 2003-11-12 |
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