TWI237659B - Compositions for cleaning organic and plasma etched residues for semiconductor devices - Google Patents
Compositions for cleaning organic and plasma etched residues for semiconductor devices Download PDFInfo
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- TWI237659B TWI237659B TW089108389A TW89108389A TWI237659B TW I237659 B TWI237659 B TW I237659B TW 089108389 A TW089108389 A TW 089108389A TW 89108389 A TW89108389 A TW 89108389A TW I237659 B TWI237659 B TW I237659B
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- 229920001558 organosilicon polymer Polymers 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- GSWAOPJLTADLTN-UHFFFAOYSA-N oxidanimine Chemical compound [O-][NH3+] GSWAOPJLTADLTN-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 229940112042 peripherally acting choline derivative muscle relaxants Drugs 0.000 description 1
- 239000003495 polar organic solvent Substances 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 229920000052 poly(p-xylylene) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 229940095574 propionic acid Drugs 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 150000003248 quinolines Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/02068—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers
- H01L21/02071—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers the processing being a delineation, e.g. RIE, of conductive layers
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/43—Solvents
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/50—Solvents
- C11D7/5004—Organic solvents
- C11D7/5009—Organic solvents containing phosphorus, sulfur or silicon, e.g. dimethylsulfoxide
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/50—Solvents
- C11D7/5004—Organic solvents
- C11D7/5013—Organic solvents containing nitrogen
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/422—Stripping or agents therefor using liquids only
- G03F7/425—Stripping or agents therefor using liquids only containing mineral alkaline compounds; containing organic basic compounds, e.g. quaternary ammonium compounds; containing heterocyclic basic compounds containing nitrogen
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/422—Stripping or agents therefor using liquids only
- G03F7/426—Stripping or agents therefor using liquids only containing organic halogen compounds; containing organic sulfonic acids or salts thereof; containing sulfoxides
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/10—Objects to be cleaned
- C11D2111/14—Hard surfaces
- C11D2111/22—Electronic devices, e.g. PCBs or semiconductors
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3209—Amines or imines with one to four nitrogen atoms; Quaternized amines
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3218—Alkanolamines or alkanolimines
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3263—Amides or imides
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/34—Organic compounds containing sulfur
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- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Detergent Compositions (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Drying Of Semiconductors (AREA)
Description
1237659 ... - —^_________________ 五、發明說明(1) 1¾背景 1¾範圍 本發明係關於半水性清潔組合物,其特別可用以自半導 體底質清除有@機和無機化合物或“聚合物,,(蝕刻後殘 >查)°此處所謂的“半水性,,是指水和有機溶劑之混合 物、。本發明亦包括使用此組合物清除半導體底質之殘渣的 $法°更Ϊ別地’本發明描述一種半水性清潔組合物及其 用,。此溶液中不含有機銨化合物和胺羧酸鹽化合物,含 有氧化合物、水和溶劑並視情況地含有腐蝕抑制劑、鉗合 劑、界面活性劑、酸和鹼。 相關技術之描瘦 多年來使用含氟化物的化學品清理半導體工業中的矽晶 圓底質(尚未插入離子或植入裝置的晶圓)。通常,氟化物 化學品(通常是稀氫氟酸)作為所謂“ RC A清洗,,程序的最 後一個程序步驟。底質通常在先前程序步驟中被單層量的 金屬、陰離子和/或有機雜質或表面殘渣(顆粒)所污染。 這些污染物對於簡單測試裝置構造的電力整體性造成明顯 衝擊,必須要有效地被清除且不能損及其整體性。這樣的 清除法包括技巧文獻中所討論的技巧,如:I n t. C on f .
On Solid State Devices and Materials, 1991, pp.484-486 或Kujime, T.等人,Proc. of the 1996 Semi. Pure Water and Chemicals, ρρ·245-256 及 S i n g e r, P · S e m i · I n t e r n a t i ο n a 1, p · 8 8,0 c t _ 1 9 9 5 〇 關於以低p H溶液清理晶圓底漆之方法的專利案包括美國
O:\64\64082.ptd 第5頁 1237659 五、發明說明(2) 專利案5, 560, 857、5, 645, 737、5, 181,985、5, 603, 849、 5, 705, 0 89。 使用氟化物(通常是HF)作為最終RCA清除步驟會使得矽 晶圓表面呈現排斥水的疏水狀態(表面被3 i _H基團所覆 蓋)。此清理步驟期間内,某些比例的晶圓表面會配溶解 (被清除)。除非小心地偵測清理條件(時間、溫度、溶液 組成),否則就會損及底質,此述KRaf〇ls,c•等人,j.
Electroanalytic Chem· 43 3,PP.7 7-83,1 99 7。數種組 合物合併水和有機溶劑。嚴格要求這些HF溶液的水濃度。 氧化矽在HF/水中的蝕刻速率是21埃/分鐘(@25。〇),但在 異丁醇中的速率降至2. 1 4埃/分鐘,在丙酮(非質子溶劑) 中更低,僅0· 12埃/分鐘,此報導於NSF/SRC Eng. Res· Center, Environmentally Benign Semiconductor
Manufacturing, Aug· 5-7, 1998, Standford
University. 在線路正面(FEOL)清理程序之後,晶圓進行用於半導體 裝置之典型的管路背面(BE〇L)製程,其中,裝置可能是動 態隨機存取記憶體(DRAM)、靜態隨機存取記憶體(sram)、 邏輯操作、電子式調整唯讀記憶體(EpR〇M)、在矽上的互 補金屬(CMOS)之類。使用化學反應(液體或電毁)的蝕刻加 工技巧曾作為形成這樣的半導體底f上之線路結構的方 上除::影
1237659 五、發明說明(3) $留影像轉移至位於下方的材料(介電物或金屬)上,以電 水%里提南反應性蝕刻氣體能量。此蝕刻用氣體選擇性地 攻擊底質之未受到保護的區域。多年來,使用液態蝕刻用 化學品(通常含有氟化物)來蝕刻金屬(An和介電物。此氟 =物的腐蝕性極強,其蝕刻無方向性(各方向上的蝕刻均 勾:。雖然Taylor,,D·,Solld State Techn〇1〇gy,Juiy ,Ρ· 11 9報導冒提出藉由統計法控制技巧來調整鉦方 •/=2此無方向…刻效果無法符合目前嚴格控 φ4八^ 了的要求。 (由光^1電漿蝕刻法包含單方向性蝕刻’同時,副產物 (ϋ阻物、姓刻用氣體和錢刻材料組成) 積在蝕刻開口的側壁上。 - Φ式版 % 2 i此保濩用側壁澱積物的一個缺點在於:蝕刻p戾之 後非㊉難清除此殘渣。如果 X釦序之 -些方式中和這些殘潰中的組的組份或以 ^蝕金屬構造的酸性物種。所得酸侵:::並形成 負面影響,如:提高電阻性和造成短路,造成 過’在使用鋁或鋁合金作為佈線材:迫樣的問 底”酸性物質接觸,若未加以調整,合」=。晶圓 兀成蝕刻操作之後,必須移除保用^面=屬結構。 塗覆的無機底質清除有機聚合型广2的:潔用組合物自經 金屬電路或使得金屬電路糊不會侵蝕、溶解 學變化。 杈糊或者使得晶圓底質有化
1237659
清除光阻塗層的清潔組合物 他底質具有高度可燃性時,通當古^灰爐且絕大多數的其 包含具有非所欲毒性程度的反庫性ί:人類和環境,其並 些清潔組合物不僅有毒性,且^ 谷劑混合物。此外,這 其棄置花費相當高。此外, ^他們是有害廢料,所以 當有限’大部分情況中,無;;的浸泡壽命通常相 以酸性有機溶劑或驗性有機溶;=再利用。 溶劑通常由盼系化合物或氣?=壁殘渣。此酸性 苯磺酸組成。這些調合物通常須V不:方族烴和/或烷基 用。這些化學品通常須以異丙醇冲洗氏於100 c的溫度使 在某些條件下,稀氫氟酸溶液 侧壁的方式清除側 乂精由強力铋蝕介電物 述於IreUnd,p : 口勿f·,此而改變組件的尺寸,此 ( 1 9 97 ),豆由 *· ’ hin Solld Films, 304, pp. 1-12 八中並提及可能改變介電常數。之前& 含HF、硝酸、水和經基胺 !:之”化一包
Muller ^ A ^ ^ ”足以铋蝕矽,此述於A. 4人的果國專利案第3, 59 2, 773號。最近的資訊亦 :出,HF溶劑無法有效地清除較新的%蝕刻殘渣,此述 :.Ueno 等人,“Cleaning 〇f CHf3 pUsma_Etched
Si02/SiN/Cu Via Structures with Dilute Hydr〇flU〇riC Acid Solutions (經 CHF3 電漿蝕刻的 Si〇 /SlN/Cu結構藉稀氫氟酸溶液之清理),,,J. Electr^chem Soc·,Vol· 144,(7) 1997。因為HF溶液會侵蝕位於下方 的TiSh層,所以,不容易以叮溶液清理TiSi2的接觸孔。 窄小的親水性接觸孔中的化學品物質傳輸也有困難,此\、
第8頁 1237659 五、發明說明(5) 於 B a k 1 a η 〇 v, Μ · R ·等人 ’ p r 〇 c · E 1 e c t r 〇 c h e m · S 〇 c ·, 1 998,97-35,pp· 6 0 2 -6 0 9。 一般層間介電物、TEOS (四乙基原矽酸鹽)和硼磷矽酸 鹽玻璃(BPSG)(其常用於超大規模整體(ULSI)構造以使得 後續的覆蓋更為一致)之接觸孔附近的光阻物通常以HF溶 液清除。HF常也會侵蝕介電材料。不希望有這樣的侵蝕狀 況(此請參考Lee, C and Lee,S,Solid State Electronics, 4, ρρ·92卜923 (1997))。 清除蝕刻後殘渣的鹼性有機溶劑可以由胺和/或烷醇胺 和/或天然有機溶劑組成。這些調合物的使用溫度通常必 須高於1 00 °c。最近,使用一種新型蝕刻後殘渣清理化學 品來清理這些底質。這些化學品包括羥基胺、胺、烷醇胺 和腐蝕抑制劑,其通常於20至30 t或更低的溫度下操作。 最近,在有限的例子中,使用以氟化物為基礎的化學品 有限度地清除蝕刻後殘渣,在BE〇L (管線背面)程序期°° 内,清除積體電路底質的光阻殘渣。許多晶圓清潔組合θ 含有氟化物組份,特定言之,含有氟化氫。除此之外,、古 些組合物可能含有強鹼性化學品(膽鹼衍生物,四烷基^ 氧化銨、氫氧化銨),此揭示於美國專利案5, 1 2 9, 9 5 5、Λ 5, 563, 1 1 9或5, 5 71,447 ;或者可以使用兩相溶劑系統,复 一相含有氫氟酸和水,第二相含有非極性有機溶劑(酮、〃 醚、烷或烯)(美國專利案第5, 6 0 3, 8 49號)。其他調合物勺 括羥基胺和氟化銨(Ward的美國專利案第5, 7〇9, 號)。匕 其他例子包括以四級銨鹽和氟化物為基礎的組合物如印
1237659 五、發明說明(6) 行的歐洲專利申請案第0 6 6 2 7 0 5號)及以有機羧酸銨鹽或胺 羧酸鹽及氟化物為基礎的組合物(如美國專利案第 5, 630, 9 04號中所揭示者)。 一些化學品亦包括鉗合劑以助於清除晶圓表面上的離子 和陰離子污染物(PCT US 98/ 0 279 4 ),但鉗合劑(如:檸樣 酸、五倍子酸和兒茶酚及其他者)會侵蝕覆蓋A丨金屬線的 氧化鋁。Ohm an和S joberg等人的研究顯示:檸檬酸離子的 強錯合力會提高氧化鋁溶解度並因此使得金屬進一步腐 餘,於pH5和6時提高166和4 68倍,此請參考Ohman等人, J· Chem· Soc·, Dalton Trans· (1983), ρ·2513)。 清除晶圓上之金屬和金屬氧化物殘渣的其他方法包括將 水蒸汽喷至電漿灰化室中,之後引入含氟氣體(氫氟 酸)(美國專利案5, 181,9 85號)或引入含氫氟酸、氟化銨和 水之pH介於1·5和7之間的液體。 fBE(^L,序期間内,也必須清除晶圓表面的細粒殘渣。 目4°卩分方在有或無超音波的情況下,使用異丙醇和/ 或^離子水。氧化物晶圓的事後化學機械拋光處理(CMΡ) 1吊僅使用去離子水,鎢晶圓則通常須併用稀NH40H和稀 HF ° 、^ ^面’青除雜質(顆粒和/或離子)有五種機構: 七呦二物理脫附,包含以大量弱吸附溶劑置換少量強 、 沒(改變表面電荷的交互作用); 2 ·以酸或η 士 以酸將其質子ΐ受面電荷,即,使Si—〇H基團帶正電或 、t化’或者以鹼移除酸而使其帶負電;
第10頁 1237659 五、發明說明(7) 3·藉由添加酸(即,離子交換)而移除吸附 藉此使得離子錯合; 」兔屬離子’ 4·雜質的氧化或分解作用,其包含金屬、有 狀物顆粒表面的氧化作用,此會改變雜質和底 而:二 學力。此化學作用也可以藉由氧化還原化學:自由i 5·蝕刻氧化物表面,此釋出雜質,同時溶解底質表面某 些厚度。 、 〃 目前利用之以氟化物為基礎的化學品有助於2和5項,但 ,須小心控制清潔條件。許多情況中,清潔組合物的组^ 是毒性相當高的反應性溶劑混合物’因此必須施以相當嚴 苛的,用條件,且須利用有危險性的化學處理程序,^用 者須穿戴安全護具以免與清潔組合物接觸。此外,因為這 f的清潔組合物中的許多有毒組份具高度揮發性且墓發速 組合物的健存和使用期間"要特定人 體和彡衣i兄女全措施。 據此,有必要發展出能夠有效地清理多種底質之蹩 圍内,對於清潔效果經改良且i寺在《電路製造範 求持續升高。此意謂:適用以清=:#底質之需 質的組合物在用於在製程中將含τ精岔之積體電路底 面無法有令人滿意的效果。 進積體電路的底質方 這些組合物也必須經濟、不損及環 本發明提出一種新穎且經改良兄且谷易使用。 义的μ潔組合物及其用法。 1237659 五、發明說明(8) _ 此組合物為水性’溶解有機和無機物質 ― 時,能夠清理各種底質。此組合物能夠更有效地:序中 質可獲致較高的產製率。查,亦意謂由經清理的底 發明概述 本發明之新顆的清潔組合物增效地增進於低溫 * 用和清潔能力’這樣的效果是使用單獨組份無法 巧’糸作 或者組份與他種清潔組份合併,或者組份::鍤到的’ (如:乙氧基乙醇胺或烧基醯胺)合併。…清潔組份 本發明的一般目的是要提出一種於低溫有效的 質清潔組合物。 ^體底 本發明的另一目的是要提出一種會抑制金屬 、 積的蝕刻後殘渣清潔組合物。 再度殿 本發明的另一目的是要形成不可燃的清潔溶液。 本發明的另一目的是要提出一種對於 ' :j ° 低的這樣的清m。 刻速率 本發明的另一目的是要提出一種這樣的、、主如… 屬底質清除蝕刻後殘渣的方法。 β冰,谷液及自金 ::明的另的是要提出一種這樣的清潔溶液 間物(v 1 as )清除蝕刻後殘渣的方法。 本發明的另一目的是要提出一種這樣 1,入Φ仏、主rr/v > J /月冻溶液及自低 k ;ι電物清除蝕刻後殘渣的方法。 的藉由使用此處所揭示的組合物和方法達到這些和相關目
1237659 五、發明說明(9) ' ------------- 根據本發明之組合物 機銨和胺羧酸鹽。其包八以清除底質上的殘渣,其不含有 種氟化合物、約20重量;約0.01重量%至約5重量%—或多 80重量%有機醯胺溶劑°約重量%水、約20重量%至約 劑。此組合物的pH介於重量%至約5〇重量%有機亞楓溶 情況地含有腐蝕抑制㈣f 7和約1〇之間。此外,組合物視 使用組合物時, 二鉗合劑、界面活性劑、酸和鹼。 足夠時間。。-貝人組合物於足以清理底質的溫度接觸 根據本發明之用 與不含有機銨和胺 有機醯胺溶劑的% 間。 、、、 以自底質清除殘渣 羧酸鹽但含有一或 合物於足以清理底 的方法包含:使底質 多種氟化合物、水和 質的溫度接觸足夠時 附圖1 Α是竇尬丄 的一 她本發明時,組合物之組成與所得腐蝕結果 的二角關係圖示。 附圖IB-1C是半 示組成處理之後 片0 導體晶圓經過附圖1 A的三角關係圖中所 一部分半導體晶圓的電子顯微(S EM)照 附圖2 A是實称士 ^ 认一 a n Μ本發明時,組合物之組成與所得腐蝕結果 的二角關係圖示。 · 附圖 2 Β - 2 C 县、a、*. 一 L 疋牛導體晶圓經過附圖2A的三角關係圖中所 不組成處理之:ίέ 附圖3是根據本部分半導體晶圓的SEM照片。 圖。 ^月之組合物之組成與pH的三角關係 1237659
附圖4是半導體晶圓以根據本發明之組合物處理之前 一部分半導體晶圓的SEM照片。 附圖5A-5D是半導體晶圓經過本發明之組合物處理之 後’ 一部分半導體晶圓的SEM照片。 i明詳述 本發明之清潔組合物不含有機銨和胺羧酸鹽。組合物中 不含有機銨和胺羧酸鹽可以得到數個優點。不使用這些化 合物降低產品的成本。有機銨和胺羧酸鹽化合物也是所謂 的相轉移觸媒。這樣的化合物在某些溶劑條件下會加速所 不欲的副反應·,即,氫氧化物之活化反應或函化物反應 (其會侵餘金屬表面),此述於“Phase —Transfer
Catalysis in Industry (工業中的相轉移觸媒),,, Practical Guide and Handbook; Mar 1991 PCT
Interface, I 存在也會使陽 此清潔組合 物是氟化銨、 和二氟化銨。 7和約1 0之間 5重量%為佳, 物中的氟化合 此清潔組合 醯胺溶劑是N, 的有機醯胺溶 源形式引入。 適當的氟化4 合物是氟化金 使得pH介於乡 .01重量%至乡 。通常,組合 南〇 nc· Marietta, GA ° 化學品中 離子和陰離子污染物以原料來 物中含有一或多種氟化合物。 二氟化銨和氟化氫。較佳氟化 若使用氟化氫,須以緩衝溶液 。此氟化合物的存在量以由約〇 約0 · 0 5重量%至約5重量% ^交佳 物濃度越低,所須使用溫度越 物含有一或多種有機酿胺溶劑 Ν-二甲基乙醯胺和ν,ν -二甲基 劑疋Ν,Ν - 一曱基乙酿胺。此有 。適當的有相 甲胺。車交子 拽酿胺溶劑^
第14頁 1237659 五、發明說明(Η) 以單獨或以混合物形式使用。此組合物可以視情況地含有 坑基亞佩,如:二曱亞楓。 此清潔組合物含水。基本上,使用高純度去離子水。 此組合物視情況地含有腐钱抑制劑。適當的腐#抑制劑 包括無機破酸鹽,如:敍、钟、納和纟如石肖酸鹽、硝酸紹和 硝酸鋅。 此組合物視情況地含有钳合劑。適當钳合劑述於1 9 9 7年 9月3 0曰發佈屬Le e的美國專利案第5,6 7 2,5 7 7號,茲將其 中所述者列入參考。較佳鉗合劑包括兒茶酚、乙二胺四醋 酸和檸檬酸。 此組合物視情況地含有界面活性劑。適當的界面活性劑 包括聚(乙稀醇)、聚(乙亞胺)和被歸類為陰離子、陽離 子、非離子、兩性離子和以矽酮為基礎的界面活性劑組合 物。較佳的界面活性劑是聚(乙烯醇)和聚(乙亞胺)。 一些組份之組合須添加酸和/或鹼以便將p Η調整至可接 受的值。適用於本發明的酸是有機或無機酸。此酸可以包 括硝酸、硫酸、磷酸、氫氯酸(雖然氫氣酸會腐蝕金屬)和 有機酸、曱酸、乙酸、丙酸、正丁酸、異丁酸、苯曱酸、 抗壞血酸、葡糖酸、蘋果酸、丙二酸、草酸、丁二酸、酒 石酸、檸檬酸、五倍子酸。最後五種有機酸是鉗合劑的例 子。 有機酸的一般結構為: _
O:\64\64082.ptd 第15頁 1237659 五、發明說明(12) 0
II
R—C—C—0H I
X X = -0H、-NIIR、-Η、- 齒素、-C02H 和-CH2-C02H、 -CHOH - C02H,其中的R通常是脂族、Η或芳族。 酸濃度可由約1至約2 5重量%。重要因素是酸和鹼產物與 任何其他物劑於水溶液中之溶解度。 適用以調整清潔組合物之pH的鹼性組份可以是任何常用 的鹼,即,氫氧化鈉、鉀、鎂之類。這些鹼主要的問題在 於會將移動的離子引至最終調合物中。移動的離子包括膽 驗(一種四級胺)或氫氧化銨。 操作: 使用本發明之清潔組合物清理底質的方法包含:使其上 有殘渣(特別是有機金屬或金屬氧化物殘潰)的底質與本發 明之清潔組合物於足以清除殘渣的溫度接觸足以清除殘渣 的時間。可以視情況地使用此技藝中熟知的攪拌、攪動、 循環、超音波振動或他種技巧。此底質通常浸在清潔組合 物中。視欲清除之底質上的特定物質改變時間和溫度。通 常,溫度由約常溫至1 0 0 °C,接觸時間由約1至6 0分鐘。本 發明的較佳接觸溫度和時間是2 5至4 5 t 2至6 0分鐘。通 常,使用組合物之後,沖洗底質。較佳的沖洗液是異丙醇 和去離子水。
O:\64\64082.ptd 第16頁 1237659 五、發明說明(13) 物清除殘 本發明之清潔組合物特別可用以自金屬和中間 漬0 化聚 本發明之組合物特別可用於低-k介電物。此技藝已緩知、、 低-k介電物,其包括氟化矽酸鹽玻璃(FSG)、氫有機石夕^ 烷聚合物(HOSP)、低有機矽氧烷聚合物(LOSP)、奈米多$ 矽石(Nanoglass)、氫矽倍半氧烷(HSQ)、甲基矽倍半氧= (MSQ)、二乙烯基矽氧烷雙(苯並環丁烯)(BCB)、矽石& X (SiLK)、聚(伸芳基醚)(PAE, Flare, Parylene)和氣 酿亞胺(F P I )。 下面的實例提出適用以清除底質上之光阻罩或殘;查 據本發明之清潔組合物和方法的例子。 實例1 ·附表1所列之含氟化錄、水、一或多種si胺彳% . N,N-二曱基乙醯胺、N,N-二甲基曱醯胺、1-曱基-2、 烷酮、N,N-二曱基丙醯胺和二曱亞楓成份的清潔化學品、 經使用C12/BC13電漿的蝕刻器(AMT DPS蝕刻市售品)麵=以 有TEOS/Ti/TiN/AlCu/TiN層合物(由底至頂)的金屬晶^ ^ 試。所得具殘渣的金屬晶圓被切成小試樣,之後試樣^ ^ 附表1所示的化學溶液中於室溫清理5分鐘。取出試樣,以 去離子水清洗,以流通氮氣乾燥。以H i t a c h i 4 5 0 〇 F E - S E M作S E M,以評估清理和腐#效果。藉肉眼比較而評 估在金屬層合物上的清除殘渣和腐蝕效果,分為1至1 0 級。附表1中的調合物以重量%表示。·
O:\64\64082.ptd 第17頁 1237659 五、發明說明(14) m 表1 時間 金屬線 調合物 nh4f 去離 子水 DMAC DMF DMSO (分鐘) 清除 A1 Ti TiN 氧化物 A 1 35 64 5 10 10 10 10 10 B 1 35 64 5 10 10 10 10 10 C 1 35 32 32 5 10 10 10 10 10 D 1 35 32 32 5 9 10 10 10 10 E 1 35 32 32 5 9.5 10 10 10 10 及· a Di water :去離子水 DMAC : N,N-二曱基乙醯胺 DMSO :二曱亞楓 DMF : N,N-二曱基曱醯胺 金屬線的金屬殘留情況 清潔線:10·完全清除,1-完全未清除 A1殘留:10-無變化,1-A1層消失 Ti殘留:10-無變化,i-Ti層消失 TiN殘留:10-無變化,ΐ-TiN層消失 氧化物殘留:10-無變化,1-氧化物層消失 此結果顯示:DMF的清除效果最佳,且無腐蝕情況。但 基於無腐钱的清除效果和毒性進一步研究DMAC和⑽训。
實例2.基於實例丨的結果,選擇N,N—二甲基乙醯胺和二 甲亞楓與氟化銨和水製成最適合的清潔調合物。使用市售 之具Cl^BCl3電漿的LAM TCP9 6 0 0蝕刻器蝕刻具氧化物/Ti/ T i N/A 1 Cu/T i N層合物(由底至頂)的金屬晶圓。所得具殘渣 的金屬晶圓被切成小試樣,之後試樣浸於附表2所示的清 漂〉谷液中於室溫清理5分鐘。取出試樣,以去離子水清 洗’以流通氮氣乾燥。以Hi tach i 4 5 0 0· FE-SEM作SEM,以 评估清理和腐蝕效果。藉肉眼比較而評估在金屬層合物上 的清除殘渣和腐蝕效果,分為1至丨〇級。附表3中所列的pH 值係以具玻璃p Η電極的〇 r丨0 n S A 5 2 0測得。附表2所列調合 物以重量%表示。
第18頁 1237659
F G H _27_ ΎΓ 27^ "39" 57 67 48 15 24 30 30 79
K
L
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Q
R 49 59 49 30 29 29 "29" 29 反應溫度·室溫 Di water :去離子水 40 20 69 25 35 45 0 20 40 0 45 35 ~25 70 (分鐘)清除
金屬線的 清泳線· 10-完全清除,丨_完全未、音 DMAC : N,N-二甲基乙醯胺A1殘留:10-無變化,1-A1声消“” DMSO · —曱亞楓 丁丨殘留· 10-無變化,l-Ti層消失 TiN殘留:10-無變化,1-TiN層消失 氧化物殘留:10-無變化,1-氧化物層消失 為了要瞭解貫附表2所示調合物所得結果,數據繪於附 圖1 A、2 A和3的三角關係圖中,分別顯示鋁腐蝕與溶液中 的水、DMAC和DMS0濃度之間的關係,殘渣清除效果與溶液 中的水、DMAC和DMS0濃度之間的關係,及組合物的pH與溶 液中的水、DMAC和DMS0濃度之間的關係。附圖1 b之比較顯 示:水含量高且DM AC和DMS0含量低的組合物實質上有腐蝕 情況發生。附圖1 C顯示:DM AC和DMS0含量較高且水含量較 低的組合物無腐蝕情況發生。附圖2 B顯示:水含量高且 DMAC和DMS0含量低的組合物僅能部分清除殘渣。附圖2C顯 示:DMAC和DMS0含量較高且水含量較低的組合物完全清除
第19頁 1237659 五、發明說明(16) 殘渣。附圖3及附圖1 A和2 A合併顯示能夠避免紹實質上被 腐触且能得到隶適清除結果的適當P 範圍。 實例3.以附表2的组合物之一(級合物N)處理經使用C1〆 BC I3電漿的蝕刻器蝕刻的金屬晶圓。乾姓之後,在這些金 屬晶圓上形成大量殘渣,此如附圖4所示者。所得具殘渣 的金屬晶圓被切成小試樣,之後試樣浸於2選用的化學溶 液中,於室溫清理3、5和1 0分鐘以清除殘渣。組合物n於5 分鐘時能夠完全清除殘渣,但於3分鐘時無法完全清除殘 渣(附圖5 A - 5 C)。取出試樣,以去離子水清洗,以流通氮 氣乾燥。以H i t a c h i 4 5 0 0 F E - S E Μ作S E Μ,以評估清理和腐 名虫效果。 進'步 毫米晶圓 用於大尺 大晶圓尺 程序的重 一晶圓的 要縮短加 胺(ΜΕΑ) 分鐘時完 嫻於此 條件而修 之用。例 >糸溶液和 發展出光可清除和殘渣可清除的技術以符合3 〇 〇 加工的需求。SEZ工具和他種新型設備越來越常 寸晶圓加工,焦點由單一晶圓轉移至2 5晶圓組。 寸提高具有無損害性之光阻清除程序及殘渣清除 要性’以面昂貴的晶圓損耗提高。此外,各個單 迅,加工有助於大幅節省總程序所須時間。為了 工時間,在選用的調合物中添加〇· 1重量% 一乙醇 士附圖5 D所不者,此具ME Α的新調合物能夠於3 全清除殘渣。 · 、 f f者知道如何由前面的實例根據製程中改變的 改交岫述清潔溶劑。前述實施例僅作為例子 與介電性相關的特定討論可用於藉提出的 万法而受到保護的他種金屬、金屬合金和聚碎結
1237659 五、發明說明(17) 構。這些實例不欲限制本發明,本發明範圍由所附申請專 利範圍規範。 此處將此說明書中提及所有的文獻和專利申請案列入參 考。 已詳細描述本發明,爛於此技術者知道如何在不違背所 附申請專利範圍之精神和目的情況下作出許多變化和修 飾。
第21頁
Claims (1)
1237659 案號 89108389 14年z 修正磬換本k 六、申請專利範圍 γ屮年 >月丨曰 1. 一種用以自底質清除殘渣之不含有機銨和胺羧酸鹽的 組合物,其包含0.01重量%至5重量% —或多種氣化合物、 2 0重量%至5 0重量%水、2 0重量%至8 0重量%有機醯胺溶劑和 0重量%至5 0重量%有機亞楓溶劑,該組合物的p Η介於7和1 0 之間。 2 .根據申請專利範圍第1項之組合物,其中,另包含 胺。 3. 根據申請專利範圍第2項之組合物,其中,胺是烷醇 胺。 4. 根據申請專利範圍第3項之組合物,其中,烷醇胺是 一乙醇胺。 5. 根據申請專利範圍第1項之組合物,其中,另包含腐 餘抑制劑。 6. 根據申請專利範圍第1項之組合物,其中,另包含鉗 合劑。 7. 根據申請專利範圍第1項之組合物,其中,另包含界 面活性劑。 8. 根據申請專利範圍第1項之組合物,其中,另包含 酸。 9. 根據申請專利範圍第1項之組合物,其中,另包含 驗。 1 0 .根據申請專利範圍第1項之組合物,其中,包含氟化 銨、水和Ν,Ν -二曱基乙醯胺。 1 1 .根據申請專利範圍第7項之組合物,其中,另包含二
O:\64\64082-940201.ptc 第23頁 1237659 案號 89108389 年乙月 日 修正 六、申請專利範圍 曱亞楓。 1 2 .根據申請專利範圍第1項之組合物,其中,包含氟化 銨、水、N,N -二甲基乙醯胺和胺。 1 3 .根據申請專利範圍第1項之組合物,其中,包含氟化 銨、水、N,N -二曱基乙醯胺和烷醇胺。 1 4.根據申請專利範圍第1項之組合物,其中,包含氟化 銨、水、經基胺、烧醇胺、钳合劑和腐餘抑制劑。 1 5 . —種用以清除底質之殘渣的方法,其包含使底質與 不含有機銨和胺魏酸鹽但包含一或多種氟化合物、水和有 機醯胺溶劑的組合物於足以清理底質的溫度接觸足夠時 間。 1 6 .根據申請專利範圍第1 5項之方法,其中,溫度由2 0 至 1 0 0 °C。 1 7 .根據申請專利範圍第1 6項之方法,其中,溫度是2 5 至 4 5 °C。 1 8 .根據申請專利範圍第1 6項之方法,其中,時間由3分 鐘至1 0分鐘。 1 9 .根據申請專利範圍第1 5項之方法,其中,組合物包 含0.01重量%至5重量% —或多種氟化合物、20重量%至50重 量%水、2 0重量%至8 0重量%有機驢胺溶劑,該組合物的ρ Η 介於7和1 0之間。 2 0 .根據申請專利範圍第1 9項之方法,其中,組合物另 包含高至5 0重量%有機亞楓溶劑。 2 1 .根據申請專利範圍第2 0項之方法,其中,組合物另
O:\64\64082-940201.ptc 第24頁 1237659 案號 89108389 修正 六、申請專利範圍 包含胺。 2 2 .根據申請專利範圍第2 1項之方法 胺。 2 3 .根據申請專利範圍第2 2項之方法 一乙醇胺。 其中 其中 胺是烷醇 烷醇胺是
O:\64\64082-940201.ptc 第25頁
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-
1999
- 1999-05-03 US US09/304,450 patent/US6248704B1/en not_active Expired - Lifetime
-
2000
- 2000-05-02 EP EP00932008A patent/EP1177275B1/en not_active Expired - Lifetime
- 2000-05-02 AT AT00932008T patent/ATE331020T1/de not_active IP Right Cessation
- 2000-05-02 WO PCT/US2000/011892 patent/WO2000066697A1/en active IP Right Grant
- 2000-05-02 KR KR1020017014021A patent/KR100561178B1/ko not_active IP Right Cessation
- 2000-05-02 DE DE60028962T patent/DE60028962T2/de not_active Expired - Fee Related
- 2000-05-02 AU AU49803/00A patent/AU4980300A/en not_active Abandoned
- 2000-05-02 JP JP2000615722A patent/JP2002543272A/ja active Pending
- 2000-06-16 TW TW089108389A patent/TWI237659B/zh not_active IP Right Cessation
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2002
- 2002-04-12 HK HK02102776.4A patent/HK1041020B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO2000066697A1 (en) | 2000-11-09 |
KR20020001863A (ko) | 2002-01-09 |
DE60028962D1 (de) | 2006-08-03 |
ATE331020T1 (de) | 2006-07-15 |
DE60028962T2 (de) | 2006-12-28 |
EP1177275A1 (en) | 2002-02-06 |
AU4980300A (en) | 2000-11-17 |
KR100561178B1 (ko) | 2006-03-15 |
JP2002543272A (ja) | 2002-12-17 |
HK1041020B (zh) | 2006-09-22 |
EP1177275B1 (en) | 2006-06-21 |
US6248704B1 (en) | 2001-06-19 |
HK1041020A1 (en) | 2002-06-28 |
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