JP2023530814A - タングステン含有膜除去のためのシステム及び方法 - Google Patents
タングステン含有膜除去のためのシステム及び方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 139
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims description 20
- 229910052721 tungsten Inorganic materials 0.000 title claims description 20
- 239000010937 tungsten Substances 0.000 title claims description 20
- 239000002243 precursor Substances 0.000 claims abstract description 109
- 238000012545 processing Methods 0.000 claims abstract description 93
- 239000000463 material Substances 0.000 claims abstract description 80
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- 150000002367 halogens Chemical class 0.000 claims abstract description 56
- 238000005530 etching Methods 0.000 claims abstract description 51
- 239000004065 semiconductor Substances 0.000 claims abstract description 42
- 229910001930 tungsten oxide Inorganic materials 0.000 claims abstract description 31
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims abstract description 30
- YGTSMYMNDOTCEI-UHFFFAOYSA-N [W].FOF Chemical compound [W].FOF YGTSMYMNDOTCEI-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000001257 hydrogen Substances 0.000 claims description 19
- 229910052739 hydrogen Inorganic materials 0.000 claims description 19
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 17
- 229910052731 fluorine Inorganic materials 0.000 claims description 17
- 239000011737 fluorine Substances 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 12
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 11
- 229910052801 chlorine Inorganic materials 0.000 claims description 11
- 239000000460 chlorine Substances 0.000 claims description 11
- QKCGXXHCELUCKW-UHFFFAOYSA-N n-[4-[4-(dinaphthalen-2-ylamino)phenyl]phenyl]-n-naphthalen-2-ylnaphthalen-2-amine Chemical compound C1=CC=CC2=CC(N(C=3C=CC(=CC=3)C=3C=CC(=CC=3)N(C=3C=C4C=CC=CC4=CC=3)C=3C=C4C=CC=CC4=CC=3)C3=CC4=CC=CC=C4C=C3)=CC=C21 QKCGXXHCELUCKW-UHFFFAOYSA-N 0.000 claims description 9
- VVRQVWSVLMGPRN-UHFFFAOYSA-N oxotungsten Chemical class [W]=O VVRQVWSVLMGPRN-UHFFFAOYSA-N 0.000 claims description 4
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 210000002381 plasma Anatomy 0.000 description 67
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- 238000005516 engineering process Methods 0.000 description 33
- 239000007789 gas Substances 0.000 description 31
- 150000002500 ions Chemical class 0.000 description 22
- 239000003989 dielectric material Substances 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 13
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 235000012431 wafers Nutrition 0.000 description 5
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
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- -1 tungsten oxide halide Chemical class 0.000 description 2
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- ZQXCQTAELHSNAT-UHFFFAOYSA-N 1-chloro-3-nitro-5-(trifluoromethyl)benzene Chemical compound [O-][N+](=O)C1=CC(Cl)=CC(C(F)(F)F)=C1 ZQXCQTAELHSNAT-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
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- 125000004429 atom Chemical group 0.000 description 1
- 238000000231 atomic layer deposition 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
- 239000012159 carrier gas Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- BWKCCRPHMILRGD-UHFFFAOYSA-N chloro hypochlorite;tungsten Chemical compound [W].ClOCl BWKCCRPHMILRGD-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 125000004122 cyclic group Chemical group 0.000 description 1
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- 230000009969 flowable effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 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
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- WIDQNNDDTXUPAN-UHFFFAOYSA-I tungsten(v) chloride Chemical compound Cl[W](Cl)(Cl)(Cl)Cl WIDQNNDDTXUPAN-UHFFFAOYSA-I 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
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32133—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only
- H01L21/32135—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only
- H01L21/32136—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only using plasmas
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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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/0206—Cleaning during device manufacture during, before or after processing of insulating layers
- H01L21/02063—Cleaning during device manufacture during, before or after processing of insulating layers the processing being the formation of vias or contact holes
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- 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
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02614—Transformation of metal, e.g. oxidation, nitridation
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- 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
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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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
- H01L21/30655—Plasma etching; Reactive-ion etching comprising alternated and repeated etching and passivation steps, e.g. Bosch process
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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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
- H01L21/76814—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics post-treatment or after-treatment, e.g. cleaning or removal of oxides on underlying conductors
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Abstract
Description
[0001] 本出願は、2020年11月20日に出願され、「タングステン含有膜除去のためのシステム及び方法(SYSTEMS AND METHODS FOR TUNGSTEN-CONTAINING FILM REMOVAL)」と題された米国特許出願第17/100,141号の利益及び優先権を主張し、その内容は、あらゆる目的のためにその全体が参照により本明細書に組み込まれる。
Claims (20)
- プラズマ放出物を生成するために、半導体処理チャンバの遠隔プラズマ領域にハロゲン含有前駆体を流入させつつ、プラズマを衝突させることと、
処理領域内に収納される基板を前記プラズマ放出物と接触させることであって、前記基板が酸化タングステンの露出領域を画定し、前記接触させることがオキシフッ化タングステン材料を生成する、処理領域内に収納される基板を前記プラズマ放出物と接触させることと、
エッチャント前駆体を前記処理領域に流入させることと、
前記オキシフッ化タングステン材料を前記エッチャント前駆体と接触させることと、
前記オキシフッ化タングステン材料を除去することと
を含む、エッチング方法。 - 前記ハロゲン含有前駆体がフッ素を含み、前記エッチャント前駆体が塩素含有前駆体を含む、請求項1に記載のエッチング方法。
- 前記ハロゲン含有前駆体が三フッ化窒素を含み、前記方法が、
水素を前記ハロゲン含有前駆体と共に流すこと
を更に含む、請求項2に記載のエッチング方法。 - 前記水素の流量が、前記ハロゲン含有前駆体の流量の少なくとも2倍である、請求項3に記載のエッチング方法。
- 前記半導体処理チャンバが、前記エッチャント前駆体の流れている間、プラズマを含まない状態に維持される、請求項1に記載のエッチング方法。
- 前記エッチング方法は、約150℃以上の温度で実行される、請求項1に記載のエッチング方法。
- 前記ハロゲン含有前駆体を流している間、前記半導体処理チャンバ内の圧力が約15Torr以下に維持される、請求項1に記載のエッチング方法。
- 前記エッチャント前駆体を流している間、前記半導体処理チャンバ内の圧力が約15Torr以上に維持される、請求項7に記載のエッチング方法。
- 前記基板が、酸化ケイ素の露出領域を更に含みうる、請求項1に記載のエッチング方法。
- 前記酸化タングステンの露出領域を画定するために、前記酸化ケイ素を通してトレンチが形成される、請求項9に記載のエッチング方法。
- 半導体処理チャンバの遠隔プラズマ領域においてプラズマ放出物を生成するために第1のハロゲン含有前駆体のプラズマを形成することと、
前記プラズマ放出物を前記半導体処理チャンバの処理領域に流入させることと、
前記処理領域内に収納される基板を前記プラズマ放出物と接触させることであって、前記基板が、前記基板内に画定されたトレンチの基部においてタングステンの領域の上に重なる酸化タングステンの露出領域を含み、前記プラズマ放出物が前記酸化タングステンをハロゲン化する、処理領域内に収納される基板を前記プラズマ放出物と接触させることと、
第2のハロゲン含有前駆体を前記半導体処理チャンバの前記処理領域に流入させることと、
ハロゲン化された前記酸化タングステンを除去することと
を含む、エッチング方法。 - 前記第1のハロゲン含有前駆体がフッ素を含み、前記第2のハロゲン含有前駆体が三塩化ホウ素を含む、請求項11に記載のエッチング方法。
- 前記第2のハロゲン含有前駆体を流す前に、プラズマの形成を停止することを更に含む、請求項11に記載のエッチング方法。
- 前記第1のハロゲン含有前駆体が三フッ化窒素を含み、前記方法が、
水素を前記第1のハロゲン含有前駆体と共に流すこと
を更に含む、請求項11に記載のエッチング方法。 - 前記水素の流量が、前記第1のハロゲン含有前駆体の流量の少なくとも2倍である、請求項14に記載のエッチング方法。
- 前記第1のハロゲン含有前駆体を流している間、前記半導体処理チャンバ内の圧力が約15Torr以下に維持される、請求項11に記載のエッチング方法。
- 前記第2のハロゲン含有前駆体を流している間、前記半導体処理チャンバ内の圧力が約15Torr以上に維持される、請求項16に記載のエッチング方法。
- 半導体処理チャンバの遠隔プラズマ領域においてプラズマ放出物を生成するためにフッ素含有前駆体のプラズマを形成することと、
前記プラズマ放出物を前記半導体処理チャンバの処理領域に流入させることと、
前記処理領域内に収納される基板を前記プラズマ放出物と接触させることであって、前記基板が、タングステンの領域の上に重なる酸化タングステンの露出領域を含み、前記プラズマ放出物が、前記酸化タングステンをフッ素化する、前記処理領域内に収納される基板を前記プラズマ放出物と接触させることと、
前記半導体処理チャンバの前記処理領域に塩素含有前駆体を流入させることと、
前記基板を前記塩素含有前駆体と接触させることと、
前記酸化タングステンを除去することと
を含む、エッチング方法。 - 水素を前記フッ素含有前駆体と共に流すこと
を更に含み、前記水素の流量が、前記フッ素含有前駆体の流量の少なくとも2倍である、請求項18に記載のエッチング方法。 - 前記フッ素含有前駆体を流している間、前記半導体処理チャンバ内の圧力が約10Torr以下に維持され、前記塩素含有前駆体を流している間、前記半導体処理チャンバ内の圧力が約20Torr以上に維持される、請求項18に記載のエッチング方法。
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