JP6294194B2 - 基板処理方法及び基板処理装置 - Google Patents
基板処理方法及び基板処理装置 Download PDFInfo
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- JP6294194B2 JP6294194B2 JP2014178216A JP2014178216A JP6294194B2 JP 6294194 B2 JP6294194 B2 JP 6294194B2 JP 2014178216 A JP2014178216 A JP 2014178216A JP 2014178216 A JP2014178216 A JP 2014178216A JP 6294194 B2 JP6294194 B2 JP 6294194B2
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- 239000000758 substrate Substances 0.000 title claims description 110
- 238000012545 processing Methods 0.000 title claims description 104
- 238000003672 processing method Methods 0.000 title claims description 50
- 239000007789 gas Substances 0.000 claims description 339
- 238000005530 etching Methods 0.000 claims description 233
- 238000000034 method Methods 0.000 claims description 72
- 230000008569 process Effects 0.000 claims description 59
- 238000000926 separation method Methods 0.000 claims description 46
- 238000010926 purge Methods 0.000 claims description 36
- 230000015572 biosynthetic process Effects 0.000 claims description 31
- 230000003746 surface roughness Effects 0.000 claims description 16
- 239000007795 chemical reaction product Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 2
- 230000001629 suppression Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 46
- 235000012431 wafers Nutrition 0.000 description 44
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 31
- 229910052814 silicon oxide Inorganic materials 0.000 description 29
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 27
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 25
- 238000004088 simulation Methods 0.000 description 22
- 230000002093 peripheral effect Effects 0.000 description 14
- 229910004298 SiO 2 Inorganic materials 0.000 description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 11
- 238000000151 deposition Methods 0.000 description 10
- 238000012546 transfer Methods 0.000 description 10
- 230000008021 deposition Effects 0.000 description 8
- 230000001590 oxidative effect Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 6
- 229910001882 dioxygen Inorganic materials 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 239000012495 reaction gas Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 5
- 239000011261 inert gas Substances 0.000 description 4
- 238000004626 scanning electron microscopy Methods 0.000 description 4
- 239000011800 void material Substances 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000000231 atomic layer deposition Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000002052 molecular layer Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- -1 CH 3 ) 2 )) 4 ) Chemical class 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical class [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- LXEXBJXDGVGRAR-UHFFFAOYSA-N trichloro(trichlorosilyl)silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)Cl LXEXBJXDGVGRAR-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
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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
- H01L21/04—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
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
- H01L21/31116—Etching inorganic layers by chemical means by dry-etching
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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
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45544—Atomic layer deposition [ALD] characterized by the apparatus
- C23C16/45548—Atomic layer deposition [ALD] characterized by the apparatus having arrangements for gas injection at different locations of the reactor for each ALD half-reaction
- C23C16/45551—Atomic layer deposition [ALD] characterized by the apparatus having arrangements for gas injection at different locations of the reactor for each ALD half-reaction for relative movement of the substrate and the gas injectors or half-reaction reactor compartments
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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
- C23C16/45578—Elongated nozzles, tubes with holes
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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
- C23C16/52—Controlling or regulating the coating process
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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
- H01L21/02123—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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- 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
- H01L21/02205—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 the layer being characterised by the precursor material for deposition
- H01L21/02208—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 the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si
- H01L21/02219—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 the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound comprising silicon and nitrogen
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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
- H01L21/0226—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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- 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
- H01L21/683—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 for supporting or gripping
- H01L21/687—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68764—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a movable susceptor, stage or support, others than those only rotating on their own vertical axis, e.g. susceptors on a rotating caroussel
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- H01L21/683—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 for supporting or gripping
- H01L21/687—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
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- Organic Chemistry (AREA)
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Description
前記処理室を、前記回転テーブルの回転方向に沿って前記エッチングガスが供給される処理領域と、前記エッチングガスが供給されずにパージガスが供給されるパージ領域とに区画し、前記回転テーブルを1回転させたときに前記基板が前記処理領域と前記パージ領域とを1回ずつ通過するようにし、
前記回転テーブルの回転速度を変化させることにより、前記膜をエッチングするエッチングレート又はエッチング後の前記膜の表面粗さを制御し、
前記膜が前記凹形状パターンを覆うように凹状に成膜されている場合であって、
前記凹形状パターン内に成膜された前記膜をV字の断面形状にエッチングするときには、前記回転テーブルの回転速度を低下させる。
該処理室内に設けられ、基板を表面上に載置可能な回転テーブルと、
該回転テーブルの前記表面に第1の成膜ガスを供給可能であり、第1の処理領域内に設けられた第1の成膜ガス供給部と、
前記第1の処理領域と前記回転テーブルの周方向に離間して設けられた第2の処理領域内に設けられ、前記第1の成膜ガスと反応する第2の成膜ガスを前記回転テーブルの前記表面に供給可能な第2の成膜ガス供給部と、
前記第2の処理領域内において前記第2の成膜ガス供給部と前記回転テーブルの周方向に離間して設けられ、前記回転テーブルの前記表面に第1のエッチングガスを供給可能な第1のエッチングガス供給部と、
前記第2の処理領域内において前記第1のエッチングガス供給部と接近して設けられ、前記回転テーブルの表面に到達前に前記第1のエッチングガスと直接的に反応可能に第2のエッチングガスを供給する第2のエッチングガス供給部と、
前記第1及び第2のエッチングガスにより前記第1及び第2の成膜ガスの反応生成物を熱エッチング可能なように前記回転テーブルを加熱する加熱手段と、を有し、
前記第1の処理領域と前記第2の処理領域は、前記処理室の天井面から下方に突出し、下面が前記回転テーブルと狭い空間を形成する凸状部を有する分離領域により区画され、
前記分離領域には、前記狭い空間をパージガスで満たして前記第1の処理領域と前記第2の処理領域とを分離するためのパージガス供給手段が設けられ、
前記基板上に成膜のみを行うときには前記第1及び第2の成膜ガス供給部から前記第1及び第2の成膜ガスをそれぞれ供給するとともに、前記第1及び第2のエッチングガス供給部からの供給を停止するかパージガスを供給し、
前記反応生成物のエッチングのみを行うときには前記第1及び第2のエッチングガス供給部から前記第1及び第2のエッチングガスをそれぞれ供給するとともに、前記第1及び第2の成膜ガス供給部からの供給を停止するかパージガスを供給する制御を行う制御手段を更に有する。
はじめに、本発明の本実施形態に係る基板処理装置について図面を用いて説明する。
次に、上述の基板処理装置を用いた本発明の実施形態に係る基板処理方法について説明する。本実施形態に係る基板処理方法は、種々の膜に対して適用可能であるが、本実施形態においては、シリコン酸化膜のエッチング及び成膜に関連する基板処理方法について説明する。なお、既に説明した構成要素については、上述の実施形態に係る基板処理装置と同一の参照符号を付して、その説明を省略する。
HF+NH3→(NH4)F (1)
SiO2+(NH4)F→H2O+(NH4)2SiF6 (2)
(NH4)2SiF6+熱→SiF4+2NH3+2HF (3)
SiO2膜をエッチングする際、SiO2とHFでは反応しないため、アンモニアを添加してフッ化アンモニウムとしてSiO2エッチングを行う。よって、本実施形態に係る基板処理方法では、第1のエッチングガスノズル321からアンモニアを供給し、第2のエッチングガスノズル322からフッ化水素を供給する。
2 回転テーブル
41、42 分離ガスノズル
100 制御部
311、312 成膜ガスノズル
321、322 エッチングガスノズル
W 基板(半導体ウエハ)
P1 第1の処理領域
P2 第2の処理領域
D 分離領域
Claims (14)
- 処理室内に設けられた回転テーブル上に、表面に凹形状パターンが形成された基板を載置し、回転テーブルを回転させながらエッチングガスを処理室内に供給し、前記基板の表面に形成された膜をエッチングするエッチング工程を含む基板処理方法であって、
前記処理室を、前記回転テーブルの回転方向に沿って前記エッチングガスが供給される処理領域と、前記エッチングガスが供給されずにパージガスが供給されるパージ領域とに区画し、前記回転テーブルを1回転させたときに前記基板が前記処理領域と前記パージ領域とを1回ずつ通過するようにし、
前記回転テーブルの回転速度を変化させることにより、前記膜をエッチングするエッチングレート又はエッチング後の前記膜の表面粗さを制御し、
前記膜が前記凹形状パターンを覆うように凹状に成膜されている場合であって、
前記凹形状パターン内に成膜された前記膜をV字の断面形状にエッチングするときには、前記回転テーブルの回転速度を低下させる基板処理方法。 - 前記エッチングレートを増加させたいときには前記回転テーブルの回転速度を低下させ、前記膜の表面粗さを小さくしたいときには前記回転テーブルの回転速度を増加させる請求項1に記載の基板処理方法。
- 前記凹形状パターン内に成膜された前記膜をV字の断面形状にせず前記膜の表面粗さを小さくするときには、前記回転テーブルの回転速度を増加させる請求項1又は2に記載の基板処理方法。
- 前記処理室内に、成膜用の原料ガスを供給する第2の処理領域を設けるとともに、前記処理領域を成膜用の処理ガスも供給可能に構成し、
前記エッチング工程でエッチングされるべき前記膜を、前記凹形状パターン内を含めた前記基板の表面上に成膜する成膜工程を更に有する請求項3に記載の基板処理方法。 - 前記エッチング工程は、前記凹形状パターン内に成膜された前記膜を前記V字の断面形状にエッチングするV字エッチング工程を含む請求項4に記載の基板処理方法。
- 前記成膜工程と前記V字エッチング工程は、交互に複数回繰り返される請求項5に記載の基板処理方法。
- 前記成膜工程は、前記回転テーブルを複数回連続的に回転させながら、前記エッチングガスを前記処理室内に供給することなく前記成膜用の原料ガス及び前記成膜用の処理ガス及び前記パージガスを前記処理室内に供給する工程を含み、
前記V字エッチング工程は、前記回転テーブルを複数回連続的に回転させながら、前記成膜用の原料ガス及び前記成膜用の処理ガスを前記処理室内に供給することなく前記エッチングガス及び前記パージガスを前記処理室内に供給する工程を含む請求項6に記載の基板処理方法。 - 前記回転テーブルを複数回連続的に回転させながら前記成膜用の原料ガス及び前記成膜用の処理ガス、前記エッチングガス及び前記パージガスを同時に供給し、前記回転テーブルが1回転する間に前記成膜工程と前記V字エッチング工程とを1回ずつ行うサイクルを複数回繰り返す請求項6に記載の基板処理方法。
- 前記エッチング工程は、前記膜の表面粗さを小さくする表面粗さ抑制工程を更に含む請求項5乃至8のいずれか一項に記載の基板処理方法。
- 前記エッチング工程における前記回転テーブルの回転速度の変更は、前記成膜工程における前記回転テーブルの回転速度を基準速度とし、該基準速度よりも前記回転速度を増加させるか低下させるかにより行われる請求項4乃至9のいずれか一項に記載の基板処理方法。
- 処理室と、
該処理室内に設けられ、基板を表面上に載置可能な回転テーブルと、
該回転テーブルの前記表面に第1の成膜ガスを供給可能であり、第1の処理領域内に設けられた第1の成膜ガス供給部と、
前記第1の処理領域と前記回転テーブルの周方向に離間して設けられた第2の処理領域内に設けられ、前記第1の成膜ガスと反応する第2の成膜ガスを前記回転テーブルの前記表面に供給可能な第2の成膜ガス供給部と、
前記第2の処理領域内において前記第2の成膜ガス供給部と前記回転テーブルの周方向に離間して設けられ、前記回転テーブルの前記表面に第1のエッチングガスを供給可能な第1のエッチングガス供給部と、
前記第2の処理領域内において前記第1のエッチングガス供給部と接近して設けられ、前記回転テーブルの表面に到達前に前記第1のエッチングガスと直接的に反応可能に第2のエッチングガスを供給する第2のエッチングガス供給部と、
前記第1及び第2のエッチングガスにより前記第1及び第2の成膜ガスの反応生成物を熱エッチング可能なように前記回転テーブルを加熱する加熱手段と、を有し、
前記第1の処理領域と前記第2の処理領域は、前記処理室の天井面から下方に突出し、下面が前記回転テーブルと狭い空間を形成する凸状部を有する分離領域により区画され、
前記分離領域には、前記狭い空間をパージガスで満たして前記第1の処理領域と前記第2の処理領域とを分離するためのパージガス供給手段が設けられ、
前記基板上に成膜のみを行うときには前記第1及び第2の成膜ガス供給部から前記第1及び第2の成膜ガスをそれぞれ供給するとともに、前記第1及び第2のエッチングガス供給部からの供給を停止するかパージガスを供給し、
前記反応生成物のエッチングのみを行うときには前記第1及び第2のエッチングガス供給部から前記第1及び第2のエッチングガスをそれぞれ供給するとともに、前記第1及び第2の成膜ガス供給部からの供給を停止するかパージガスを供給する制御を行う制御手段を更に有する基板処理装置。 - 前記制御手段は、前記基板の表面に凹形状パターンが形成されて前記反応生成物が前記凹形状パターンを覆うように凹状に成膜されている場合であって、前記凹形状パターン内に成膜された前記反応生成物をV字の断面形状にエッチングするときには、前記回転テーブルの回転速度を低下させる制御を行う請求項11に記載の基板処理装置。
- 前記制御手段は、前記凹形状パターン内に成膜された前記反応生成物をV字の断面形状にせず前記反応生成物の表面粗さを小さくするときには、前記回転テーブルの回転速度を増加させる制御を行う請求項12に記載の基板処理装置。
- 前記制御手段は、前記基板上に成膜のみを行う成膜工程と、前記反応生成物をV字の断面形状にエッチングするV字エッチング工程とを複数回交互に繰り返す制御を実行可能である請求項12に記載の基板処理装置。
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