TW202035760A - 在半導體元件圖案化中形成及使用應力調整矽氧化物膜的方法 - Google Patents
在半導體元件圖案化中形成及使用應力調整矽氧化物膜的方法 Download PDFInfo
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- TW202035760A TW202035760A TW108141153A TW108141153A TW202035760A TW 202035760 A TW202035760 A TW 202035760A TW 108141153 A TW108141153 A TW 108141153A TW 108141153 A TW108141153 A TW 108141153A TW 202035760 A TW202035760 A TW 202035760A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 229910052814 silicon oxide Inorganic materials 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title abstract description 48
- 239000004065 semiconductor Substances 0.000 title description 14
- 238000000059 patterning Methods 0.000 title description 10
- 239000000758 substrate Substances 0.000 claims abstract description 139
- 125000006850 spacer group Chemical group 0.000 claims abstract description 97
- 238000000151 deposition Methods 0.000 claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 28
- 238000003672 processing method Methods 0.000 claims abstract description 28
- 239000003054 catalyst Substances 0.000 claims abstract description 19
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 7
- 150000004706 metal oxides Chemical group 0.000 claims description 67
- 229910044991 metal oxide Inorganic materials 0.000 claims description 66
- 239000002243 precursor Substances 0.000 claims description 24
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 9
- 239000007800 oxidant agent Substances 0.000 claims description 8
- ORJFXWYTRPGGRK-UHFFFAOYSA-N hydroxy-tris(2-methylbutan-2-yloxy)silane Chemical compound CCC(C)(C)O[Si](O)(OC(C)(C)CC)OC(C)(C)CC ORJFXWYTRPGGRK-UHFFFAOYSA-N 0.000 claims description 7
- 229910004140 HfO Inorganic materials 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910017083 AlN Inorganic materials 0.000 claims description 3
- 229910017109 AlON Inorganic materials 0.000 claims description 3
- 229910018565 CuAl Inorganic materials 0.000 claims description 3
- 229910004491 TaAlN Inorganic materials 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 229910010041 TiAlC Inorganic materials 0.000 claims description 3
- 229910010037 TiAlN Inorganic materials 0.000 claims description 3
- 229910010282 TiON Inorganic materials 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- JYVBNFXXWVYHSW-UHFFFAOYSA-N hydroxy(propan-2-yloxy)silane Chemical group C(C)(C)O[SiH2]O JYVBNFXXWVYHSW-UHFFFAOYSA-N 0.000 claims 2
- ONDQEVCPHRPPAO-UHFFFAOYSA-N hydroxy-bis[(2-methylpropan-2-yl)oxy]silane Chemical compound O[SiH](OC(C)(C)C)OC(C)(C)C ONDQEVCPHRPPAO-UHFFFAOYSA-N 0.000 claims 2
- HLDBBQREZCVBMA-UHFFFAOYSA-N hydroxy-tris[(2-methylpropan-2-yl)oxy]silane Chemical compound CC(C)(C)O[Si](O)(OC(C)(C)C)OC(C)(C)C HLDBBQREZCVBMA-UHFFFAOYSA-N 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 97
- 239000010410 layer Substances 0.000 description 69
- 239000010936 titanium Substances 0.000 description 36
- 239000000463 material Substances 0.000 description 29
- 239000007789 gas Substances 0.000 description 23
- 230000008021 deposition Effects 0.000 description 20
- 238000005530 etching Methods 0.000 description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 229910052710 silicon Inorganic materials 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 229920002120 photoresistant polymer Polymers 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000001459 lithography Methods 0.000 description 5
- 229910003481 amorphous carbon Inorganic materials 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 239000003446 ligand Substances 0.000 description 4
- 239000012808 vapor phase Substances 0.000 description 4
- -1 aryloxide Chemical class 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000006117 anti-reflective coating Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 229920003209 poly(hydridosilsesquioxane) Polymers 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000012431 wafers Nutrition 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- SKFZERZUPMPVDI-UHFFFAOYSA-N C(C)(C)(C)O[Si](O)(OC(C)(C)C)OC(C)(C)C.C(C)(C)(C)O[Si](O)(OC(C)(C)C)OC(C)(C)C Chemical compound C(C)(C)(C)O[Si](O)(OC(C)(C)C)OC(C)(C)C.C(C)(C)(C)O[Si](O)(OC(C)(C)C)OC(C)(C)C SKFZERZUPMPVDI-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
- 229910002601 GaN Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 1
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- 229910011208 Ti—N Inorganic materials 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 150000003983 crown ethers Chemical class 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 239000003361 porogen Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- MNWRORMXBIWXCI-UHFFFAOYSA-N tetrakis(dimethylamido)titanium Chemical compound CN(C)[Ti](N(C)C)(N(C)C)N(C)C MNWRORMXBIWXCI-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910006400 μ-Cl Inorganic materials 0.000 description 1
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- H—ELECTRICITY
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—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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- H01L21/00—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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- 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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- H01L21/02175—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 at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
- H01L21/02178—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 at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal the material containing aluminium, e.g. Al2O3
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- H01L21/022—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 a laminate, i.e. composed of sublayers, e.g. stacks of alternating high-k metal oxides
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02205—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
- H01L21/02214—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 oxygen
- H01L21/02216—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 oxygen the compound being a molecule comprising at least one silicon-oxygen bond and the compound having hydrogen or an organic group attached to the silicon or oxygen, e.g. a siloxane
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0337—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
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Abstract
一種處理方法,包括:接收包含基底層之基板,基底層具有形成於其上、包含複數特徵部之心軸圖案;保形地沉積矽氧化物膜在心軸圖案上,其係藉由:塗佈含金屬催化劑層於基板表面,及在不存在任何氧化劑及水解劑下,在一基板溫度下將基板暴露至包含矽烷醇氣體之處理氣體,該基板溫度係選擇以在矽氧化物膜中產生期望應力水準。該方法更包括:從心軸圖案之上表面及與心軸圖案相鄰之下表面去除矽氧化物膜,留下矽氧化物側壁間隔物在心軸圖案之側壁上;及從基板去除心軸圖案,留下矽氧化物側壁間隔物而形成一新圖案,該新圖案具有已去除之心軸圖案之特徵部數量之兩倍。
Description
本發明關於半導體製造,具體而言,關於在半導體元件圖案化中形成及使用應力調整矽氧化物膜做為側壁間隔物之方法。
[相關申請案之交互參照]
本申請案關於及主張於2018年11月13日提出之美國臨時專利申請案第62/760,222號之優先權,其完整內容係併入本申請案中之參考資料。
間隔物(spacer)圖案化是一種技術,用於圖案化線寬小於傳統微影所能達成之特徵部。一般而言,間隔物是沉積在預先圖案化特徵部(通常稱為心軸)上之一層。隨後回蝕間隔物,使得覆蓋心軸之間隔物部分被蝕刻掉,然而保留側壁上之間隔物部分。接著可移除心軸,每一心軸留下二間隔物(每一邊緣一間隔物)。這通常稱為自對準雙重圖案化(SADP)。可進一步修整間隔物為較窄的寬度,特別是做為心軸以用於形成後續的第二間隔物。在重複SADP時,實現節距之額外減半。這通常稱為自對準四重圖案化(SAQP)。可實施該重複多次,並且通常稱為自對準多重圖案化(SAMP)。
本發明之實施例描述一種在半導體元件圖案化中形成及使用應力調整矽氧化物膜做為側壁間隔物之方法。根據一實施例,該方法包括:接收一基板,該基板包含一基底層,該基底層具有形成於其上、包含複數特徵部之一心軸圖案;保形地沉積一矽氧化物膜在該心軸圖案上,其係藉由:塗佈一含金屬催化劑層於該基板之表面,及在不存在任何氧化劑及水解劑之情況下,在一基板溫度下將該基板暴露至包含矽烷醇氣體之一處理氣體,該基板溫度係選擇以在該矽氧化物膜中產生一期望應力水準。該方法更包括:從該心軸圖案之上表面及與該心軸圖案相鄰之下表面去除該矽氧化物膜,以留下複數矽氧化物側壁間隔物在該心軸圖案之複數側壁上;及從該基板去除該心軸圖案,以留下該等矽氧化物側壁間隔物,該等矽氧化物側壁間隔物形成一新圖案,該新圖案具有已去除之該心軸圖案之特徵部數量之兩倍。該方法更包括:將該新圖案轉移至該基底層中;及從該基板去除該等矽氧化物側壁間隔物。
根據一實施例,該方法包括:接收一基板,該基板包含一基底層,該基底層具有形成於其上、包含複數特徵部之一心軸圖案;保形地沉積一矽氧化物膜在該心軸圖案上,其係藉由:塗佈一含金屬催化劑層於該基板之表面,及在不存在任何氧化劑及水解劑之情況下,在一基板溫度下將該基板暴露至包含矽烷醇氣體之一處理氣體,該基板溫度係選擇以在該矽氧化物膜中產生一期望應力水準。該方法更包括:從該心軸圖案之上表面及與該心軸圖案相鄰之下表面去除該矽氧化物膜,以留下複數矽氧化物側壁間隔物在該心軸圖案之複數側壁上;及從該基板去除該心軸圖案,以留下該等矽氧化物側壁間隔物,該等矽氧化物側壁間隔物形成一新圖案,該新圖案具有已去除之該心軸圖案之特徵部數量之兩倍。該方法更包括:保形地沉積一金屬氧化物膜在該新圖案上;從該新圖案之上表面及與該新圖案相鄰之下表面去除該金屬氧化物膜,以留下複數金屬氧化物側壁間隔物在該新圖案之複數側壁上;及從該基板去除該等矽氧化物側壁間隔物,以留下該等金屬氧化物側壁間隔物,該等金屬氧化物側壁間隔物形成一第二新圖案,該第二新圖案具有已去除之該新圖案之特徵部數量之兩倍。該方法可更包括:將該新圖案轉移至該基底層中;及從該基板去除該等金屬氧化物側壁間隔物。
根據另一實施例,該方法包括:接收一基板,該基板包含一基底層,該基底層具有形成於其上、包含複數特徵部之一心軸圖案;保形地沉積一矽氧化物膜在該心軸圖案上,其係藉由:塗佈一含金屬催化劑層於該基板之表面,及在不存在任何氧化劑及水解劑之情況下,在一基板溫度下將該基板暴露至包含矽烷醇氣體之一處理氣體,該基板溫度係選擇以在該矽氧化物膜中產生一期望應力水準。該方法更包括:保形地沉積一金屬氧化物膜在該矽氧化物膜上;從該心軸圖案之上表面及與該心軸圖案相鄰之下表面去除該金屬氧化物膜及該矽氧化物膜,以留下複數金屬氧化物側壁間隔物及複數矽氧化物側壁間隔物在該心軸圖案之複數側壁上;及從該基板去除該心軸圖案,以留下該等金屬氧化物側壁間隔物及該等矽氧化物側壁間隔物,該等金屬氧化物側壁間隔物及該等矽氧化物側壁間隔物形成一新圖案,該新圖案具有已去除之該心軸圖案之特徵部數量之兩倍。該方法可更包括:將該新圖案轉移至該基底層中;及從該基板去除該等金屬氧化物側壁間隔物及該等矽氧化物側壁間隔物。
本發明之實施例描述一種在半導體元件圖案化中形成並使用應力調整(stress-tuned)矽氧化物膜做為側壁間隔物之方法。需要對側壁間隔物之許多材料性質進行調整控制,以改善間隔物圖案而用於越來越小的特徵部尺寸。半導體元件圖案化中之關鍵挑戰為,在基板上堆疊各種材料層所產生之內在應力以及在材料層上形成之側壁間隔物之材料性質。本發明之實施例描述一種用於調整做為側壁間隔物之矽氧化物膜之物理應力之方法,其中該物理應力可影響相對於基板上之其它材料之蝕刻選擇性、線邊緣粗糙度(LER)、線寬粗糙度(LWR)、以及整體圖案轉移。這包括側壁間隔物之更直的垂直輪廓,這允許圖案轉移至側壁間隔物下方之層之改善。此外,矽氧化物膜之應力調整可用於影響沉積在矽氧化物膜上之其它膜之物理應力。
本發明之實施例提供一種基板處理方法,包括一系列處理步驟,包括:接收基板至製造平台中,該基板具有形成於其上、包含複數特徵部之心軸圖案;以及在膜形成模組中保形地施加薄膜在心軸圖案上。整合處理步驟系列更包括:在蝕刻模組中從心軸圖案之上表面以及與心軸圖案相鄰之下表面去除薄膜,以在心軸圖案之側壁上留下薄膜,從而形成側壁間隔物;在蝕刻模組中從基板去除心軸圖案,以留下側壁間隔物,其中側壁間隔物形成新圖案,該新圖案具有已去除的心軸圖案之特徵部數量之倍數;以及可選地,使用該新圖案做為另一心軸圖案並且重複保形地施加薄膜、去除薄膜及去除心軸圖案之處理步驟一或多次,其中每一重複會使特徵部之數量加倍。根據一些實施例,薄膜可包括矽氧化物、金屬摻雜的矽氧化物、或包含交替的矽氧化物及金屬氧化物膜之積層結構。
當使用在本文中,「基板」一詞意指且包含其上方形成有材料之基底材料或結構。應當了解,基板可包含單一材料、複數層之不同材料、其中具有不同材料或不同結構之區域之一層或複數層等。該等材料可包含半導體、絕緣體、導體、或其組合。例如,基板可為半導體基板、在支撐結構上之基底半導體層、金屬電極,或其上形成有一或更多層、結構或區域之半導體基板。基板可為習知的矽基板、或包含半導體材料層之其它主體基板。當使用在本文中,「主體基板」一詞不僅意指並包含矽晶圓,也意指並包含絕緣層上矽(「SOI」,silicon-on-insulator)基板,例如矽藍寶石(「SOS」,silicon-on-sapphire)基板及矽玻璃(「SOG」,silicon-on-glass)基板、基底半導體基礎上之矽磊晶層、以及其它半導體或光電材料,例如矽-鍺、鍺、砷化鎵、氮化鎵、及磷化銦。基板可為摻雜的或非摻雜的。
基板可包括已經過微影製程之各種材料之堆疊,其中將光阻塗佈至基板上並曝光以形成心軸圖案。然後經由一系列蝕刻步驟將光阻圖案轉移至下方層。對於熟悉此項技藝者而言,用於在基板上產生心軸圖案之不同方案是已知的,心軸可為有機心軸或硬心軸,包括例如矽、非晶碳、光阻聚合物、氧化物、氮化物等之材料。一種這樣的方案涉及:沉積光學或有機平坦化層(OPL),通常是旋塗材料;然後沉積矽抗反射塗層(SiARC),亦為旋塗;然後進行光阻塗佈及微影製程。另一方案涉及:使用化學氣相沉積(CVD)來沉積非晶碳層;然後使用CVD製程來沉積SiON膜;然後使用旋塗製程來沉積底部抗反射塗層(BARC);然後進行光阻塗佈及微影流程。
圖1A-1F藉由橫剖面圖概要地顯示出根據本發明實施例之基板處理方法。現在參考圖1A,該方法包括接收基板1,基板1包含基底材料100及基底層101,具有形成於其上、包含複數特徵部之心軸圖案102。為了簡單起見,基板1係繪示為其上具有基底層101,最終圖案將被轉移至基底層101,且心軸圖案102形成在基底層101上;然而,應當理解,其上形成有心軸圖案102之結構可為多層結構,其中基底層101僅為複數層其中一者。如熟悉此項技藝者所知,心軸圖案102之特徵部包含水平及垂直表面(亦即,側壁),其可使用標準微影技術及蝕刻技術來產生。
基底層101可包括導電層、非導電層或半導電層。例如,基底層101可包括至少一材料層,該至少一材料層包括含矽材料,例如多晶矽、二氧化矽、矽氮化物、矽碳化物或矽氮氧化物。基底層101可包含介電層,包括標稱介電常數值小於SiO2
介電常數之低介電常數(亦即,低k)層或超低介電常數(亦即,超低k)層,SiO2
之介電常數約為4(例如,熱二氧化矽之介電常數在從約3.8至約3.9之範圍內)。介電層可包括有機、無機或無機-有機混摻材料其中至少一者。另外,介電層可為多孔的或非多孔的。例如,介電層可包括使用CVD沉積之基於矽酸鹽的材料,例如碳摻雜的矽氧化物(或有機矽氧烷)。可選地,介電層可包括由單相組成之多孔無機-有機混摻膜,例如具有CH3
鍵之基於矽氧化物的基質,其阻礙了介電層在固化或沉積製程期間之完全緻密化,以產生小空隙(或孔洞)。仍然可選地,介電層可包括由至少兩相組成之多孔無機-有機混摻膜,例如具有在固化製程期間會分解及蒸發之有機材料(例如,致孔劑)之孔洞之碳摻雜的基於矽氧化物的基質。仍然可選地,介電層可包括使用旋塗介電質(SOD)技術所沉積之無機的基於矽酸鹽的材料,例如氫倍半矽氧烷(HSQ)或甲基倍半矽氧烷(MSQ)。仍然可選地,介電層可包括使用SOD技術所沉積之有機材料。
參照圖1B,該方法更包括在心軸圖案102上保形地沉積矽氧化物膜104,其係藉由在基板1之表面上塗佈含金屬的催化劑層,然後在不存在任何氧化劑及水解劑之情況下,將基板1在一基板溫度下暴露至包含矽烷醇氣體之處理氣體,該基板溫度係選擇以在矽氧化物膜104中產生期望的應力水準。塗佈及暴露步驟可在不存在電漿且時間上沒有重疊之情況下依序進行。溫和的處理條件減少或消除了對敏感的心軸材料(例如非晶碳、光阻聚合物等)之蝕刻或損壞。
在基板表面上塗佈含金屬的催化劑層之步驟可包括,將基板1暴露至包含金屬之氣體脈衝,以使含金屬的催化劑層吸附在基板1之表面上。金屬可在基板1之表面上反應,以形成厚度小於單層之化學吸附層。在一範例中,含金屬的催化劑層可包括含金屬的前驅物,例如AlMe3
。每一氣體脈衝可包括各別的吹淨(purge)或抽空步驟,以從膜沉積模組中去除未反應的氣體或副產物。
含金屬的催化劑層之範例包括含有鋁(Al)、鈦(Ti)或鋁及鈦兩者之層。根據一實施例,含金屬的催化劑層係選自於由Al、Al2
O3
、AlN、AlON、含Al前驅物、Al合金、CuAl、TiAlN、TaAlN、Ti、TiAlC、TiO2
、TiON、TiN、含Ti前驅物、Ti合金、含Hf前驅物、含Zr前驅物、及其組合所構成之群組。
本發明之實施例可利用各種的含鋁前驅物。例如,許多鋁前驅物之化學式為:AlL1
L2
L3
Dx
,其中,L1
、L2
、L3
為各別的陰離子配位基,D為中性供體配位基,x可為0、1或2。每一L1
、L2
、L3
配位基可各別地選自於烷氧化物(alkoxide)、鹵化物(halide)、芳基氧化物(aryloxide)、醯胺(amide)、環戊二烯基、烷基、矽烷基、脒基(amidinate)、β-二酮基(β-diketonate)、酮亞胺(ketoiminate)、矽烷醇化物(silanoate)、及羧酸鹽(carboxylate)之群組。D配位基可選自於醚、呋喃(furan)、吡啶(pyridine)、吡咯(pyrole)、吡咯烷(pyrolidine)、胺、冠醚(crown ether)、二醇醚(glyme)及腈(nitrile)之群組。鋁前驅物之其它範例包含:AlMe3
、AlEt3
、AlMe2
H、 [Al(O s
Bu)3
]4
、Al(CH3
COCHCOCH3
)3
、AlCl3
、AlBr3
、AlI3
、Al(O i
Pr)3
、[Al(NMe2
)3
]2
、Al( i
Bu)2
Cl、Al( i
Bu)3
、Al( i
Bu)2
H、AlEt2
Cl、Et3
Al2
(O s
Bu)3
、及Al(THD)3
。本發明之實施例可使用各種含Ti前驅物。範例包含具有「Ti-N」分子內鍵結之含Ti前驅物,包含Ti(NEt2
)4
(TDEAT)、Ti(NMeEt)4
(TEMAT)、Ti(NMe2
)4
(TDMAT)。其它範例包含具有「Ti-C」分子內鍵結之含Ti前驅物,包含Ti(COCH3
)(η5
-C5
H5
)2
Cl、Ti(η5
-C5
H5
)Cl2
、Ti(η5
-C5
H5
)Cl3
、Ti(η5
-C5
H5
)2
Cl2
、Ti(η5
-C5
(CH3
)5
)Cl3
、Ti(CH3
)(η5
-C5
H5
)2
Cl、Ti(η5
-C9
H7
)2
Cl2
、Ti((η5
-C5
(CH3
)5
)2
Cl、Ti((η5
-C5
(CH3
)5
)2
Cl2
、Ti(η5
-C5
H5
)2
(μ-Cl)2
、Ti(η5
-C5
H5
)2
(CO)2
、Ti(CH3
)3
(η5
-C5
H5
)、Ti(CH3
)2
(η5
-C5
H5
)2
、Ti(CH3
)4
、Ti(η5
-C5
H5
)(η7
-C7
H7
)、Ti(η5
-C5
H5
)(η8
-C8
H8
)、Ti(C5
H5
)2
(η5
-C5
H5
)2
、Ti((C5
H5
)2
)2
(η-H)2
、Ti(η5
-C5
(CH3
)5
)2
、Ti(η5
-C5
(CH3
)5
)2
(H)2
、及Ti(CH3
)2
(η5
-C5
(CH3
)5
)2
。TiCl4
係含有「Ti-鹵素」鍵結之鈦鹵化物前驅物之一範例。
在一些範例中,矽烷醇氣體可選自於由三(叔-戊氧基)矽烷醇(tris(tert-pentoxy)silanol,TPSOL)、三(叔-丁氧基)矽烷醇(tris(tert-butoxy)silanol)、及雙(叔-丁氧基)(異丙氧基)矽烷醇(bis(tert-butoxy)(isopropoxy)silanol)所構成之群組。但是,可考慮及使用其它矽烷醇氣體。
保形矽氧化物膜104之厚度係藉由矽烷醇氣體在含金屬的催化劑層上之自限制吸附來控制。含金屬的催化劑層催化保形矽氧化物膜104在基板1上之沉積。觀察到此催化效果,直到沒有催化位置可用於反應為止,此後矽氧化物沉積停止。在一些範例中,含金屬的催化劑層催化約10-15nm之矽氧化物之沉積。可重複塗佈及暴露步驟至少一次,以增加矽氧化物膜104之厚度。
可對矽氧化物膜104進行應力調整,以使矽氧化物膜104之材料性質最佳化。根據一實施例,可選擇基板溫度,以在矽氧化物沉積期間產生期望水準的壓縮應力或拉伸應力於矽氧化物膜104中。此外,可選擇基板溫度,以產生基本上不受應力的矽氧化物膜104。
圖3顯示出測得的矽氧化物膜應力與在矽氧化物膜沉積期間之基板溫度之關係。沉積後,在室溫下測量膜應力。使用交替的AlMe3
及TPSOL氣體暴露,使矽氧化物膜沉積在平坦的矽晶圓上。膜應力結果顯示出,當基板溫度在約200°C與約750°C之間時,矽氧化物膜具有拉伸應力,而當基板溫度小於約200°C或大於約750°C時,矽氧化物膜具有壓縮應力。此外,當基板溫度為約200°C或約750°C時,矽氧化物膜不受應力。這允許藉由簡單地選擇基板溫度而沉積受到拉伸應力、壓縮應力或不受應力之矽氧化物膜。
可藉由添加摻雜劑(例如,金屬)至膜中以進一步調整矽氧化物膜104中之物理應力。金屬可,例如,包括Al、Hf或Ti。在一範例中,可使用交替的矽氧化物及金屬氧化物膜之積層。金屬氧化物可,例如,包含TiO2
、Al2
O3
、HfO2
、ZrO2
或其組合。積層可藉由以下步驟來形成:首先藉由依序暴露至含金屬的催化劑及矽烷醇氣體來沉積矽氧化物膜104(如上所述)、然後沉積金屬氧化物膜、並且根據需要重複沉積步驟。金屬氧化物膜可藉由以下步驟來沉積:將基板暴露至含金屬的前驅物(例如,含Ti、含Al、含Hf或含Zr的前驅物),然後將基板暴露至氧化劑(例如,O2
或H2
O)。在一範例中,藉由實施二循環之SiO2
沉積、十循環之Al2
O3
沉積、及重複依序的SiO2
及Al2
O3
沉積五次,以形成(SiO2
/Al2
O3
)5
積層在基板上。測量所得的(SiO2
/Al2
O3
)5
積層,其具有約10MPa之拉伸應力。用於比較,使用二循環之SiO2
沉積所沉積之SiO2
膜具有約50MPa之壓縮應力。在另一範例中,矽氧化物膜104可藉由以下步驟與金屬摻雜(混合):依序暴露至含金屬的催化劑、含金屬的前驅物(例如,含Ti、含Al、含Hf或含Zr前驅物)、以及矽烷醇氣體。可實施該等依序的暴露步驟,直到摻雜的矽氧化物膜104具有期望的厚度為止。
參照圖1C,該方法更包括,從心軸圖案102之上表面及與心軸圖案102相鄰之下表面去除矽氧化物膜104,以留下矽氧化物膜104在心軸圖案102之側壁上,以形成矽氧化物側壁間隔物106。可使用碳氟化合物及碳氫化合物蝕刻氣體來去除矽氧化物膜104,例如使用CF4
、CH4
或CH3
F。
參照圖1D,該方法更包括,從基板1去除心軸圖案102,以留下矽氧化物側壁間隔物106,其中矽氧化物側壁間隔物106形成新圖案,該新圖案具有已去除的心軸圖案102之特徵部數量之兩倍。在一範例中,可使用電漿激發的O2
氣體而選擇性地去除包含非晶碳或光阻聚合物之心軸圖案102。心軸圖案102之去除可能導致矽氧化物側壁間隔物106向旁邊傾斜。然而,根據本發明之實施例,可在沉積矽氧化物膜104期間調整在矽氧化物側壁間隔物106中形成之物理應力,導致矽氧化物側壁間隔物106之垂直輪廓變直(向旁邊傾斜較少)。這允許圖案轉移至矽氧化物側壁間隔物106下方之基底層101之改善。
參照圖1E,該方法更包括,將新圖案之矽氧化物側壁間隔物106轉移至基底層101中,從而在基底層101中形成已蝕刻特徵部103。在一範例中,利用電漿激發的蝕刻氣體之非等向性氣相蝕刻製程可用於該轉移。
參照圖1F,該方法更包括,從基板去除矽氧化物側壁間隔物106。可使用碳氟化合物及碳氫化合物蝕刻氣體(例如,使用CF4
、CH4
或CH3
F)而選擇性地去除矽氧化物側壁間隔物106。
圖2A至2F藉由橫剖面圖概要地顯示出根據本發明實施例之基板處理方法。圖1D中之基板1已複製為圖2A中之基板2,包含新圖案之矽氧化物側壁間隔物106在基底層101上。
參照圖2B,該方法更包括,保形地沉積金屬氧化物膜108在新圖案之矽氧化物側壁間隔物106上。金屬氧化物膜108可包含TiO2
、Al2
O3
、HfO2
、ZrO2
或其組合。金屬氧化物膜108之沉積可如上所述。可藉由在金屬氧化物膜108之沉積期間所使用之處理條件來控制金屬氧化物膜108之物理應力性質。此外,由於金屬氧化物膜108與矽氧化物側壁間隔物106之間之晶格匹配,因此矽氧化物側壁間隔物106中之物理應力可能影響金屬氧化物膜108中之物理應力。物理應力可能影響相對於基板上之其它材料之蝕刻選擇性、LER及LWR。
參照圖2C,該方法更包括,從新圖案之上表面及與新圖案相鄰之下表面去除金屬氧化物膜108,以留下金屬氧化物膜108在新圖案之側壁上,從而形成金屬氧化物側壁間隔物110。
參照圖2D,該方法更包括,從基板2選擇性地去除新圖案之矽氧化物側壁間隔物106,以留下形成第二新圖案之金屬氧化物側壁間隔物110,該第二新圖案具有已去除的新圖案之特徵部數量之兩倍。可使用氣相蝕刻製程來選擇性地去除矽氧化物側壁間隔物106,該氣相蝕刻製程對於蝕刻矽氧化物與金屬氧化物是具有選擇性的。
參照圖2E,該方法更包括,將第二新圖案之金屬氧化物側壁間隔物110轉移至基底層101中,從而形成已蝕刻特徵部105在基底層101中。在一範例中,利用電漿激發的蝕刻氣體之非等向性氣相蝕刻製程可用於該轉移。
參照圖2F,該方法更包括,從基板2去除金屬氧化物側壁間隔物110。
圖4A至4F藉由橫剖面圖概要地顯示出根據本發明實施例之基板處理方法。圖1B中之基板1已複製為圖4A中之基板4,包含矽氧化物膜104沉積在心軸圖案102上。
參照圖4B,該方法更包括,沉積金屬氧化物膜112在矽氧化物膜104上。金屬氧化物膜112可包含TiO2
、Al2
O3
、HfO2
、ZrO2
或其組合。金屬氧化物膜112之沉積可如上所述。基板4上之矽氧化物膜104之存在保護心軸圖案102,使心軸圖案102在可能使用氧化劑、電漿或兩者之金屬氧化物膜112沉積期間免受損壞。可藉由在金屬氧化物膜112之沉積期間所使用之處理條件來控制金屬氧化物膜112之物理應力性質。此外,由於金屬氧化物膜112與矽氧化物膜104之間之晶格匹配,因此矽氧化物膜104中之物理應力可能影響金屬氧化物膜112中之物理應力。物理應力可能影響相對於基板上之其它材料之蝕刻選擇性、LER及LWR。
參照圖4C,該方法更包括,從心軸圖案102之上表面及與心軸圖案102相鄰之下表面去除金屬氧化物膜112及矽氧化物膜104,以留下金屬氧化物膜112在心軸圖案102側壁上之矽氧化物膜104上,因而形成金屬氧化物側壁間隔物116及矽氧化物側壁間隔物114。
參照圖4D,該方法更包括,從基板4去除心軸圖案102以留下金屬氧化物側壁間隔物116及矽氧化物側壁間隔物114,其中金屬氧化物側壁間隔物116及矽氧化物側壁間隔物114形成新圖案,該新圖案具有已去除的心軸圖案102之特徵部數量之兩倍。
參照圖4E,該方法更包括,將新圖案之金屬氧化物側壁間隔物116及矽氧化物側壁間隔物114轉移至基底層101中,從而形成已蝕刻特徵部107在基底層101中。在一範例中,利用電漿激發的蝕刻氣體之非等向性氣相蝕刻製程可用於該轉移。
參照圖4F,該方法更包括,從基板4去除金屬氧化物側壁間隔物116及矽氧化物側壁間隔物114。
在各種實施例中揭露了一種在半導體元件圖案化中形成及使用應力調整矽氧化物膜做為側壁間隔物之方法。為了說明及描述之目的,以上已經提出了本發明實施例之實施方式。其並非詳盡無遺的或用於將本發明限制於所揭露的精確形式。該實施方式及以下的申請專利範圍包括僅用於說明目的之術語,並且不應被解釋為限制。根據以上的教示內容,熟悉此項技藝者可以理解,許多的修改及變化是可能的。對於圖式中之各種構件,熟悉此項技藝者將能了解各種均等組合及替代物。因此,本發明之範圍不應受該實施方式所限制,而是由所附的申請專利範圍所限制。
1:基板
2:基板
4:基板
100:基底材料
101:基底層
102:心軸圖案
103:已蝕刻特徵部
104:矽氧化物膜
105:已蝕刻特徵部
106:矽氧化物側壁間隔物
107:已蝕刻特徵部
108:金屬氧化物膜
110:金屬氧化物側壁間隔物
112:金屬氧化物膜
114:矽氧化物側壁間隔物
116:金屬氧化物側壁間隔物
在附圖中:
圖1A-1F藉由橫剖面圖概要地顯示出根據本發明實施例之基板處理方法;
圖2A-2F藉由橫剖面圖概要地顯示出根據本發明實施例之基板處理方法;
圖3顯示出測得的矽氧化物膜應力與在矽氧化物膜沉積期間之基板溫度之關係;及
圖4A-4F藉由橫剖面圖概要地顯示出根據本發明實施例之基板處理方法。
2:基板
100:基底材料
101:基底層
106:矽氧化物側壁間隔物
108:金屬氧化物膜
Claims (20)
- 一種基板處理方法,包括: 接收一基板,該基板包含一基底層,該基底層具有形成於其上、包含複數特徵部之一心軸圖案; 保形地沉積一矽氧化物膜在該心軸圖案上,其係藉由: 塗佈一含金屬催化劑層於該基板之表面,及 在不存在任何氧化劑及水解劑之情況下,在一基板溫度下將該基板暴露至包含矽烷醇氣體之一處理氣體,該基板溫度係選擇以在該矽氧化物膜中產生一期望應力水準; 從該心軸圖案之上表面及與該心軸圖案相鄰之下表面去除該矽氧化物膜,以留下複數矽氧化物側壁間隔物在該心軸圖案之複數側壁上;及 從該基板去除該心軸圖案,以留下該等矽氧化物側壁間隔物,該等矽氧化物側壁間隔物形成一新圖案,該新圖案具有已去除之該心軸圖案之特徵部數量之兩倍。
- 如請求項1之基板處理方法,其中該基板溫度係在約200°C與約750°C之間,該矽氧化物膜具有拉伸應力。
- 如請求項1之基板處理方法,其中該基板溫度係小於約200°C或大於約750°C,該矽氧化物膜具有壓縮應力。
- 如請求項1之基板處理方法,其中該基板溫度係約200°C或約750°C,該矽氧化物膜不受應力。
- 如請求項1之基板處理方法,其中該含金屬催化劑層係選自於由Al、Al2 O3 、AlN、AlON、含Al前驅物、Al合金、CuAl、TiAlN、TaAlN、Ti、TiAlC、TiO2 、TiON、TiN、含Ti前驅物、Ti合金、含Hf前驅物、含Zr前驅物、及其組合所構成之群組。
- 如請求項1之基板處理方法,其中該矽烷醇氣體係選自於由三(叔-戊氧基)矽烷醇(TPSOL)、三(叔-丁氧基)矽烷醇、及雙(叔-丁氧基)(異丙氧基)矽烷醇所構成之群組。
- 如請求項1之基板處理方法,其中該矽氧化物膜與一金屬氧化物形成一混合物,該金屬氧化物包含TiO2 、Al2 O3 、HfO2 、ZrO2 或其組合。
- 如請求項1之基板處理方法,更包括: 將該新圖案轉移至該基底層中;及 從該基板去除該等矽氧化物側壁間隔物。
- 如請求項1之基板處理方法,其中在該矽氧化物膜中之該期望應力水準改善該等矽氧化物側壁間隔物之垂直輪廓。
- 如請求項1之基板處理方法,更包括: 保形地沉積一金屬氧化物膜在該新圖案上; 從該新圖案之上表面及與該新圖案相鄰之下表面去除該金屬氧化物膜,以留下複數金屬氧化物側壁間隔物在該新圖案之複數側壁上;及 從該基板去除該等矽氧化物側壁間隔物,以留下該等金屬氧化物側壁間隔物,該等金屬氧化物側壁間隔物形成一第二新圖案,該第二新圖案具有已去除之該新圖案之特徵部數量之兩倍。
- 如請求項10之基板處理方法,其中該金屬氧化物膜包含TiO2 、Al2 O3 、HfO2 、ZrO2 或其組合。
- 如請求項10之基板處理方法,更包括: 將該第二新圖案轉移至該基底層中;及 從該基板去除該等金屬氧化物側壁間隔物。
- 一種基板處理方法,包括: 接收一基板,該基板包含一基底層,該基底層具有形成於其上、包含複數特徵部之一心軸圖案; 保形地沉積一矽氧化物膜在該心軸圖案上,其係藉由: 塗佈一含金屬催化劑層於該基板之表面,及 在不存在任何氧化劑及水解劑之情況下,在一基板溫度下將該基板暴露至包含矽烷醇氣體之一處理氣體,該基板溫度係選擇以在該矽氧化物膜中產生一期望應力水準; 保形地沉積一金屬氧化物膜在該矽氧化物膜上; 從該心軸圖案之上表面及與該心軸圖案相鄰之下表面去除該金屬氧化物膜及該矽氧化物膜,以留下複數金屬氧化物側壁間隔物及複數矽氧化物側壁間隔物在該心軸圖案之複數側壁上;及 從該基板去除該心軸圖案,以留下該等金屬氧化物側壁間隔物及該等矽氧化物側壁間隔物,該等金屬氧化物側壁間隔物及該等矽氧化物側壁間隔物形成一新圖案,該新圖案具有已去除之該心軸圖案之特徵部數量之兩倍。
- 如請求項13之基板處理方法,其中該基板溫度係在約200°C與約750°C之間,該矽氧化物膜具有拉伸應力。
- 如請求項13之基板處理方法,其中該基板溫度係小於約200°C或大於約750°C,該矽氧化物膜具有壓縮應力。
- 如請求項13之基板處理方法,其中該基板溫度係約200°C或約750°C,該矽氧化物膜不受應力。
- 如請求項13之基板處理方法,其中該含金屬催化劑層係選自於由Al、Al2 O3 、AlN、AlON、含Al前驅物、Al合金、CuAl、TiAlN、TaAlN、Ti、TiAlC、TiO2 、TiON、TiN、含Ti前驅物、Ti合金、含Hf前驅物、含Zr前驅物、及其組合所構成之群組。
- 如請求項13之基板處理方法,其中該矽烷醇氣體係選自於由三(叔-戊氧基)矽烷醇(TPSOL)、三(叔-丁氧基)矽烷醇、及雙(叔-丁氧基)(異丙氧基)矽烷醇所構成之群組。
- 如請求項13之基板處理方法,其中該金屬氧化物膜包含TiO2 、Al2 O3 、HfO2 、ZrO2 或其組合。
- 如請求項13之基板處理方法,更包括: 將該新圖案轉移至該基底層中;及 從該基板去除該等金屬氧化物側壁間隔物及該等矽氧化物側壁間隔物。
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