TW200826172A - Thermal F2 etch process for cleaning CVD chambers - Google Patents
Thermal F2 etch process for cleaning CVD chambers Download PDFInfo
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- TW200826172A TW200826172A TW096147311A TW96147311A TW200826172A TW 200826172 A TW200826172 A TW 200826172A TW 096147311 A TW096147311 A TW 096147311A TW 96147311 A TW96147311 A TW 96147311A TW 200826172 A TW200826172 A TW 200826172A
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- decane
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- fluorine
- fluorine gas
- tantalum nitride
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004140 cleaning Methods 0.000 title claims abstract description 17
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 22
- 239000011737 fluorine Substances 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 6
- 239000011261 inert gas Substances 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 32
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 18
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- DIOQZVSQGTUSAI-UHFFFAOYSA-N n-butylhexane Natural products CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 claims description 12
- 238000010790 dilution Methods 0.000 claims description 8
- 239000012895 dilution Substances 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- DIOQZVSQGTUSAI-NJFSPNSNSA-N decane Chemical class CCCCCCCCC[14CH3] DIOQZVSQGTUSAI-NJFSPNSNSA-N 0.000 claims description 6
- -1 cesium nitride Chemical class 0.000 claims description 5
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- KBGADHOXHFMSMR-UHFFFAOYSA-N CCCCCCCCCC.C(C)NCC Chemical compound CCCCCCCCCC.C(C)NCC KBGADHOXHFMSMR-UHFFFAOYSA-N 0.000 claims description 2
- 101000735417 Homo sapiens Protein PAPPAS Proteins 0.000 claims description 2
- 102100034919 Protein PAPPAS Human genes 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims 2
- MSMBMPVUCWOJPY-UHFFFAOYSA-N 1-N,1-N'-ditert-butyldecane-1,1-diamine Chemical compound C(C)(C)(C)NC(NC(C)(C)C)CCCCCCCCC MSMBMPVUCWOJPY-UHFFFAOYSA-N 0.000 claims 1
- HFMYYUCIDTYNDV-UHFFFAOYSA-N CCCCCCCCCC.C(C)(C)(C)NC(C)(C)C Chemical compound CCCCCCCCCC.C(C)(C)(C)NC(C)(C)C HFMYYUCIDTYNDV-UHFFFAOYSA-N 0.000 claims 1
- JVVOTUDSDVXCQH-UHFFFAOYSA-N [S].C(C)(C)NC(C)C Chemical compound [S].C(C)(C)NC(C)C JVVOTUDSDVXCQH-UHFFFAOYSA-N 0.000 claims 1
- 229910052786 argon Inorganic materials 0.000 claims 1
- 229910052792 caesium Inorganic materials 0.000 claims 1
- 239000001307 helium Substances 0.000 claims 1
- 229910052734 helium Inorganic materials 0.000 claims 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract description 9
- 239000004065 semiconductor Substances 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 2
- 229910052581 Si3N4 Inorganic materials 0.000 abstract 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 13
- 239000010453 quartz Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 150000004767 nitrides Chemical class 0.000 description 9
- 238000005530 etching Methods 0.000 description 8
- 238000000151 deposition Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 150000001412 amines Chemical group 0.000 description 3
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
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- 238000001994 activation Methods 0.000 description 2
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- 230000008021 deposition Effects 0.000 description 2
- UAOMVDZJSHZZME-UHFFFAOYSA-N diisopropylamine Natural products CC(C)NC(C)C UAOMVDZJSHZZME-UHFFFAOYSA-N 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 150000004756 silanes Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000007725 thermal activation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- QCLQZCOGUCNIOC-UHFFFAOYSA-N azanylidynelanthanum Chemical compound [La]#N QCLQZCOGUCNIOC-UHFFFAOYSA-N 0.000 description 1
- CFJRGWXELQQLSA-UHFFFAOYSA-N azanylidyneniobium Chemical compound [Nb]#N CFJRGWXELQQLSA-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229940043279 diisopropylamine Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 150000002221 fluorine Chemical class 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- VYIRVGYSUZPNLF-UHFFFAOYSA-N n-(tert-butylamino)silyl-2-methylpropan-2-amine Chemical compound CC(C)(C)N[SiH2]NC(C)(C)C VYIRVGYSUZPNLF-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- YBRBMKDOPFTVDT-UHFFFAOYSA-N tert-butylamine Chemical compound CC(C)(C)N YBRBMKDOPFTVDT-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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Classifications
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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
- H01L21/30—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
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4405—Cleaning of reactor or parts inside the reactor by using reactive gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- Materials Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
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- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Drying Of Semiconductors (AREA)
- Chemical Vapour Deposition (AREA)
Description
200826172 九、發明說明: 發明所屬之技術領域
方法。 種使用預稀釋的氟氣的熱活化源對半 •有的氮化矽的設備表面進行熱清潔的 先前技術 在互補金屬氧化物半導體(CMOS)積體電路製備中,低 列步驟中的一部分起到非
壓化學氣相沈積(LPCVD)作爲系 常重要的作用。在執辟/5虛吳士 . 爲嚴重問題。爲克服該問題,引入了需要較少熱能以反應 的新LPCVD前驅物。例如,作爲使用DCS和氨在7〇〇〇c 沈積氮化矽薄膜的備選方案,有機胺取代的矽烷(〇rganic amine substituted silanes)如雙(第三 丁基胺)石夕烷(BTBas, Bis(Tertiary Butyl Amino) silane)、二異丙基胺矽烧(DIPAS) 和二乙基胺矽烷(DEAS)或有機取代的石夕烷(organic substituted silane)如四烯丙基石夕烧和三乙烯基石夕烧以及雙
600QC或更低溫度下反應是有利的,因爲這明顯地降低了 熱預算。由這種方法製得的氮化矽薄膜不僅沈積在晶片 上,而且也沈積在石英反應器壁和反應器部件上。而且, 5 200826172 具有高的拉伸應力,由於反應 導致薄膜碎裂(spalling)而引起 這種方法製得的氮化物薄膜 為中累積的沈積物,這可以 的設備晶片的高水準的顆粒污染。爲防止晶片污染,必須 在累積的沈積㈣始碎裂前清潔氮化物爐。由於薄膜碎裂 引起的顆粒形成’較高應力薄膜要求對lpcvd反應器和 曰曰 片固定器進行更頻繁的清潔。 Ο
現行實踐是通過冷卻石英管至室溫手工清潔氮化矽沈 和物的LPCVD反應态’然後移走它們並將它們放置在濕 HF蝕刻中。濕清潔過程要求設備一共停工8至6小時。與 只要求在生産60-90天後進行清潔的DCS氮化物爐相比, BTBAS氮化物爐—般要求在每玉作兩天後進行清潔。因 此對於在體和半導體(volume semiconductor)生産中實用 的有機胺取代的矽烷或有機取代的矽烷氮化物方法來說, 运將要求具有2-3小時循環時間的原位清潔。而且,有機 胺取代的矽烷或有機取代的矽烷的沈積要求溫度範圍是 500-600。(:。因此,作爲大約在500_600〇c範圍的反應器溫 度函數的清潔時間變得更加重要。 D. Foster,J'Ellenberger,R· B. Herring,A. D. Johnson 和 C. L. Hartz,Ιπ-situ process for periodic cleaning of lov temperature nitride furnaces% Proceeding of the 204th Meeting of the Electrochemical Society, Orlando FL (The
Electrochemical Society,Inc·,Pennington,NJ,2003 年 10 月),第285-293頁(其主題引入本文供參考)公開了在這個 溫度範圍内使用20% NF3蝕刻SiNx,但是該蝕刻較慢(在 6 200826172 550°C和30托下爲ο.” μιη/πιίη)。對於在體積半導體生產 中實用的有機胺取代的矽烷或有機取代的矽烷氮化物方法 來說’需要更有效的在500。C-600QC附近具有較低的熱活 化溫度的清潔方法。 發明内容 本發明方法的一個實施方案包括使在惰性氣體中預先 稀釋的氟氣流過艙,並且保持艙在230_565QC的升高的溫 C :’ 度(elevated temperature)下使氟氣熱離解(disassociate),從 而通過移去由熱活化的氟氣與不希望有的氮化矽之間的化 學反應所形成的揮發性反應産物siF4清潔CVD艙。根據本 發明的另一實施方案,使用45〇aC_55〇〇C的升高的溫度。 實施方式 圖1顯示了本發明的試驗性實施方案的示意圖。設備 〇 (setup)的中間部件是反應管1,該反應管由鎳201合金和焊 接到所述管的不銹鋼CF法蘭(c〇nflate flange)端製成。管的 外徑("0.D”)是21/4"並在管中央含有6英寸χΐ5英寸的盛裝 氮化物晶片試樣3的鎳盤2。通過移去CF法蘭,將盤子2 在管1的末端插入。反應管丨被爐子4包圍,該爐子是由 Advanced Temperature Systems生産,具有用於提升樣品溫 度的加熱器。通過Watl〇wPIEU2制器控制反應器溫度。通 過以50或100 sccm流率使來自高壓氣瓶的N2中預稀釋的 F2流動,向反應器中引入分子氟氣5。流動由型moo 7 200826172 加熱的質量流動控制器MFC控制。在每次試驗前後使用純 氮氣6吹掃反應器。使用由MKS系、统生產的加熱的(_。〇 電容昼力計〇_托)測量反應器管麼。通過在反應器輸出 側用間閥7調節系統的抽吸速度從而手動控制壓力。使用 Alcatel兩段旋轉泵8來抽吸系統。 用DCS沈積的氮化石夕薄膜是在Si02層上的約j微米厚 的氣切。將氮切晶片劈開成大約2 em X 2 em的小塊試
樣3。再將試樣放入反應器前,樣品首先在氨-過氧化物溶 液(RCA- i清潔)中在7〇〇c清们〇油以去除任何有機污染 物。然後將試樣放入〇.5%HF溶液+ 5_1〇秒以去除可能已 堆積的任何表面氧化物。然後漂洗樣品,乾燥,然後放入 反應器中。 將氮化矽樣品放置在盤子上置於熱反應器的中央,相對 於i子’其-端略微升高(約5叫,並且試樣的表面與氣 體流動平行。反應器管的端部然後通過放置cf真空法蘭而 山封進仃幾次抽吸/真空循環以去除反應器中的大氣氣 體°然後帛lGGseem的氮氣吹掃反應器。—旦吹掃所述搶, 打開爐子4,亚且編程以在2h内達到操作溫度。一旦爐子 達到設定溫度,使用額外2小時以保證内部溫度達標「使 ^結在所述艙中白勺熱偶牌(thermal _pie監視内部 ^度。—旦反應器的内部溫度達標,Μ閉氮氣閥,並且使 仔f統抽空至〈丨⑻毫托。在達到基礎真空水平後,通過打 開氣乱閥將既氣引人反應器。然後對晶片在任何位置進行 钱刻’飿刻時間爲i分鐘至1G分鐘以上,前者針對較重的 8 200826172 ㈣(較高溫度和μ力),後者針對較少的钱刻(較低溫度和 壓力)。通過關閉氟氣閥停止蝕刻並且立即打開閘閥7以充 分排空所述艙並使揮發性反應産物被完全從所述艙抽出。 1時間由氮切暴露於I氣的時間長度確^。然:後在移 出樣品試樣後冷卻反應器。在實際操作環境中,钮刻和^ 潔在一般的操作條件下進行。 ^ Ο 在蝕刻前後使用反射儀分析氮化矽樣品以通過薄臈厂^ 度的變化破定钱刻率。然後通過將材料厚度的變化(單位予 納米)除以蝕刻時間來計算蝕刻率。 …、 因舄DOT規程限制在壓力不高於4〇〇psig氣瓶内運輪 純乱氣’所以使用稀釋(不高於·)分子氟氣。使用氮氣 或其他惰性氣體稀釋的氟氣降低了氟氣的危險,同時使可 :運輸的氟氣的量最大化。這就允許使用大量氟氣清潔所 述舶而無需現場氟氣產生器。
試驗I ^在弟一次試驗中,反應器管保持在400〇c、30托。在反 :為官中引入不同濃度的在N2中預稀釋的F2。使用在… 1稀釋的F2飯刻的氮切(SiNx)的熱钱刻率測量結果與 F2濃度的關係如表1所示。 " ^度(〇c) 壓力(托) ------ 名虫刻率 __400 30 ... ^ Ί 厂^ V *11 1_11 /上上夏X 1丄少 __ 17 〜 400 30 29 ^^ 30 155 〜 9
200826172 結果顯示稀釋的分子氟氣(不超過2 0 %)具有低熱活化溫 度。F2與氮化矽反應生成可從所述艙抽出的sip4。使用2.5〇/〇 的F2時’钱刻率是1 7 nm/min,使用5%的f2時,钱刻率 是29 nm/min,使用20%的F2時,蝕刻率是155 nm/min。 結果表明在固定的溫度和壓力下蝕刻率隨F2濃度增加而增 加。結果進一步表明即使使用非常低濃度的2·5% &,钱刻 率在 400。(:時是 〇·〇ΐ7μιη/ιηίη,這與在 550°C 使用 20% NF3 的姓刻率〇·〇2μπι/ιηίη相當。
試驗II 爲進一步確定在Ν2中預稀釋的20%F2對氮化矽的熱蝕 刻率,進行了試驗設計(DOE)研究。D〇E研究的參數範圍 涵蓋了溫度23〇〇C_51M和壓力1〇_1〇3托。確定了不同溫 度和壓力下共12個氮化矽的蝕刻率。 表II給出了在不同溫度和壓力下用預稀釋的观F2所 餘刻的氮化石夕的熱姓刻率的測量結果。結果再次表明稀釋 (不大於20%)的分子氟氣具有低埶 勺他熱活化/孤度,即使在低溫 例如230〇C氮化矽的蝕刻同樣發生。 10 200826172
資料表明钱刻士名口 : ~Γ~ 一' ^ —--:-- 羊很大耘度上取決於溫度以及在較小程 Ο 度上取決於壓力。在3 L以下钱刻率相當低,在500oC 和1〇0托條件下迅速提高至>600nm/min。 5式驗111 以第二個試驗爲基礎,進一步研究了在固定壓力不同溫 I,度下。使用預稀釋的2G% F2的钱刻率。在這組試驗中,在 则。C_55〇〇C溫度範圍内,在30托下用N2 t的20% F2進 灯了系列熱蝕刻率試驗。相對於溫度的蝕刻率的試驗資 料繪製於圖2。 在3〇〇 C下20% F2的钱刻率是53 nm/min,在400°C m/min ’在550 C下迅速增加至965 nm/min。資 料表明蝕刻率隨溫度增加呈指數增加,如圖2中指數配適 的實線所證實。
圖3圖示了 30托下N2中預稀釋的20% NF3對用BTBAS 11 200826172 所沈積的氮化矽薄膜的熱NF3蝕刻率與500°C-600QC溫度 範圍的函數關係。資料取自D. Foster, J. Ellenberger,R. B. Herring,A. D. Johnson 和 C. L· Hartz,’’In-situ process for periodic cleaning of low temperature nitride furnaces,'1 Proceedings of the 204th Meeting of the Electrochemical Society, Orlando FZ(The Electrochemical Society, Inc.?
Pennington,NJ,2003 年 l〇 月),第 285-293 頁中的的圖 i(其 主題引入本文供參考)。該實線是指數配適的。 、 雖然20% NF3對氮化石夕的餘刻率也顯示爲呈指數增 加,20% NF3的這種增加的窗口(wind〇w)(約58〇QC)比20¾ F2 (約370。〇高約200度。因爲下一代氮化矽沈積方法將在 明顯低於580QC條件下進行,所以這一結果意義重大。 如圖3的圖表所示,在30〇。^6〇〇。〇溫度範圍内,熱的 20% NF3的蝕刻率明顯低於熱的2〇% h的蝕刻率(如圖2所 示)°例如,在500。(:和30托下的20%NF3的蝕刻率(約2 ◎ nm/min)小於在相同溫度和壓力下的20%匕蝕刻率(約5〇〇 nm/min)兩個數量級以上。 试驗結果表明稀釋的分子氟氣(不大於2〇%)具有低得夕 的熱活化溫度和高得多的餘刻率。因此,稀釋的分子氟疗 (不大於20%)以大約300〇C-600〇c的較低的熱活化溫产在 半導體加工艙中提供更有效地清潔設備表面的不希望 氮化矽。 王有的
試驗IV 爲評價蝕刻對石英反應器潛在的損害,谁 疋仃了如下試 12 .200826172 驗,研究試驗II條件下20%F2和100%NFs對石英的影響。 在熱F2和NF3暴露後,測量火焰拋光石英(Si〇2)的重量損 失和表面褪化。這些測量提供了氮化物選擇性的估值並說 明20% F2和l〇0% NF3對石英反應器潛在的損害。 表iv是結果總結。除了在55〇cC下使用氟氣蝕刻樣品 1 0 min以外,全部石英樣品都餘刻2〇 。目測檢查後, Ο 用20%氟氣_的石英片表觀爲在響^下㈣樣品時的 光滑和輕微混濁(hazy)到在550cC下蝕刻樣品時的非常混 濁。或者,使用i 00% NF3蝕刻時除了導致石英片混濁之外 還V致其、交色(留下呈褐色的外表)。這種石英餘刻率資料 結合上述氮化矽蝕刻率資料表明在400°C下20。/。F2時不希 望有的石英蝕刻類似於550。(:下100% NF3的蝕刻,然而 20% F2對氮化矽的蝕刻率高得多。 表IV暴露於熱h和NF3後,火焰拋光石英的餘刻率 和表面褪化 钱刻氣體 」盈度 壓力 蝕刻率% 目測表面損害 '~----- (托) (質量損失%/分) 空白 ^ n/a n/a n/a 光滑且透明表顴 ' ~~~――_ F2 550 50 0.496 非常混濁但~ 變色 -----— F2 400 ------ 50 0.045 輕微混濁但是沒有~ 變色 550 —---- 100 — -------- 混濁且呈褐色轡耷 nf3 ^^ V/ · V/ J 550 10 0.042 輕微混濁且呈褐色 - '--- —-_ 變色 Ο 13 200826172 雖然已經在細節上描述了具體的實施方案, 通技術人員將理解在本公開内容的整體教導下 料些細節的各種修改及變形。因此,具體公 疋用於也明’亚不限制本發明的範圍,本發明 附的申請專利範圍和其任何等價方案給出。 但本領域普 ’可以形成 開的方案只 的範圍由所 圖式簡單說明 圖1是本發明的熱F2蝕刻的實施方案的示 圖2圖不了在30托下,仏中預稀釋的2〇% 的熱F2钱刻率與溫度的關係。 圖3圖示了在30托下,Ν2中預稀釋的20% 矽的熱NF3蝕刻率與溫度的關係。 意圖。 、的氮化矽 NF3的氮化 主要元件符號說明 1反應管 3晶片試樣 i) 5分子氟氣 7閘閥 2 盤子 4 爐子 6純氮氣 8旋轉泵 14
Claims (1)
- 200826172 十、申請專利範圍: 艙中不希望有 1 · 一種使用預稀釋的氟氣對半導體加工 的氮化矽的設備表面熱清潔的方法,包括: (a)使在惰性氣體中預稀釋的氟氣流過所述艙 下以熱 (b)使所述艙保持在230aC_565〇c的升高的溫度 離解氟氣;(C)通過(b)中熱解離的氟氣與不希望有的氮化矽之 的化學反應生成揮發性反應產物,從表面清除不希望有 氮化矽; ^ 間 的 (d)從所述艙中去除揮發性反應産物。 2·如申請專利範圍第丨項的方法,其中所述升高的溫 度是 450-550°C。 μ 汝申叫專利範圍第丨或2項的方法,其中該惰性氣 體中預稀釋的氟氣的氟氣濃度不大於20%。 4·如申請專利範圍第1《2項的方法,其中惰性氣體 選自氮氣、氬氣、氦氣及其混合物。 5·如申請專利範圍第1或2項的方法,其進一步包括 (e)使所述艙壓力保持在1〇至ι〇ι托的範圍内。 6·如申凊專利範圍帛1或2項的方法,#中通過有機 15 200826172 胺取代的矽烷或有機取代的矽烷與氨反應沈積氮化矽。 7 ·如申请專利範圍第6項的方法,其中有機胺取代的 石夕烧選自雙第三丁基胺矽烷(BTBAS)、二異丙基胺石夕燒 DIPAS和二乙基胺矽烷(DEAS),而有機取代的石夕燒選自四 烯丙基矽烷和三乙烯基矽烷以及雙第三丁基胺基矽烷。 8.如申請專利範圍第【或2項的方法’其中氮化矽通 過一氣石夕烧(DCS)與氨的反應而沈積。 Ο 16
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USD981973S1 (en) | 2021-05-11 | 2023-03-28 | Asm Ip Holding B.V. | Reactor wall for substrate processing apparatus |
USD1023959S1 (en) | 2021-05-11 | 2024-04-23 | Asm Ip Holding B.V. | Electrode for substrate processing apparatus |
USD980813S1 (en) | 2021-05-11 | 2023-03-14 | Asm Ip Holding B.V. | Gas flow control plate for substrate processing apparatus |
USD980814S1 (en) | 2021-05-11 | 2023-03-14 | Asm Ip Holding B.V. | Gas distributor for substrate processing apparatus |
CN113680767A (zh) * | 2021-07-14 | 2021-11-23 | 深圳市拉普拉斯能源技术有限公司 | 一种lpcvd炉管在线清洗方法 |
USD990441S1 (en) | 2021-09-07 | 2023-06-27 | Asm Ip Holding B.V. | Gas flow control plate |
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US2538657A (en) * | 1945-07-10 | 1951-01-16 | Gen Electric | Tetra allyl silane and polymers thereof |
US4786352A (en) * | 1986-09-12 | 1988-11-22 | Benzing Technologies, Inc. | Apparatus for in-situ chamber cleaning |
US5714011A (en) * | 1995-02-17 | 1998-02-03 | Air Products And Chemicals Inc. | Diluted nitrogen trifluoride thermal cleaning process |
JPH1072672A (ja) * | 1996-07-09 | 1998-03-17 | Applied Materials Inc | 非プラズマ式チャンバクリーニング法 |
US5861065A (en) * | 1997-01-21 | 1999-01-19 | Air Products And Chemicals, Inc. | Nitrogen trifluoride-oxygen thermal cleaning process |
US5868852A (en) * | 1997-02-18 | 1999-02-09 | Air Products And Chemicals, Inc. | Partial clean fluorine thermal cleaning process |
US20030010354A1 (en) * | 2000-03-27 | 2003-01-16 | Applied Materials, Inc. | Fluorine process for cleaning semiconductor process chamber |
JP2002100618A (ja) * | 2000-07-18 | 2002-04-05 | Showa Denko Kk | 半導体製造装置のクリーニングガス及びクリーニング方法 |
JP3421329B2 (ja) * | 2001-06-08 | 2003-06-30 | 東京エレクトロン株式会社 | 薄膜形成装置の洗浄方法 |
WO2003054247A2 (en) * | 2001-12-13 | 2003-07-03 | Showa Denko K.K. | Cleaning gas composition for semiconductor production equipment and cleaning method using the gas |
JP4430918B2 (ja) * | 2003-03-25 | 2010-03-10 | 東京エレクトロン株式会社 | 薄膜形成装置の洗浄方法及び薄膜形成方法 |
JP4272486B2 (ja) * | 2003-08-29 | 2009-06-03 | 東京エレクトロン株式会社 | 薄膜形成装置及び薄膜形成装置の洗浄方法 |
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2006
- 2006-12-13 US US11/638,120 patent/US20080142046A1/en not_active Abandoned
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2007
- 2007-12-11 TW TW096147311A patent/TW200826172A/zh unknown
- 2007-12-11 EP EP07122918A patent/EP1932941A1/en not_active Withdrawn
- 2007-12-12 JP JP2007321131A patent/JP2008153662A/ja not_active Withdrawn
- 2007-12-12 KR KR1020070129309A patent/KR20080055673A/ko not_active Application Discontinuation
- 2007-12-13 CN CNA2007100932788A patent/CN101225511A/zh active Pending
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US20080142046A1 (en) | 2008-06-19 |
KR20080055673A (ko) | 2008-06-19 |
JP2008153662A (ja) | 2008-07-03 |
EP1932941A1 (en) | 2008-06-18 |
CN101225511A (zh) | 2008-07-23 |
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