JP7568714B2 - ケイ素化合物、及びそのケイ素化合物を使用する膜を堆積するための方法 - Google Patents
ケイ素化合物、及びそのケイ素化合物を使用する膜を堆積するための方法 Download PDFInfo
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- JP7568714B2 JP7568714B2 JP2022509119A JP2022509119A JP7568714B2 JP 7568714 B2 JP7568714 B2 JP 7568714B2 JP 2022509119 A JP2022509119 A JP 2022509119A JP 2022509119 A JP2022509119 A JP 2022509119A JP 7568714 B2 JP7568714 B2 JP 7568714B2
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- propylsilane
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- 238000000034 method Methods 0.000 title claims description 64
- 238000000151 deposition Methods 0.000 title claims description 29
- 229910021332 silicide Inorganic materials 0.000 title 1
- 238000006243 chemical reaction Methods 0.000 claims description 37
- 239000003153 chemical reaction reagent Substances 0.000 claims description 31
- 229910052760 oxygen Inorganic materials 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 25
- 239000001301 oxygen Substances 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 23
- 238000011282 treatment Methods 0.000 claims description 21
- AQRLNPVMDITEJU-UHFFFAOYSA-N triethylsilane Chemical compound CC[SiH](CC)CC AQRLNPVMDITEJU-UHFFFAOYSA-N 0.000 claims description 20
- 239000012686 silicon precursor Substances 0.000 claims description 18
- -1 halide ions Chemical class 0.000 claims description 16
- 229910052734 helium Inorganic materials 0.000 claims description 16
- 238000005229 chemical vapour deposition Methods 0.000 claims description 14
- 125000004122 cyclic group Chemical group 0.000 claims description 11
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 125000000217 alkyl group Chemical group 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 9
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 229910052743 krypton Inorganic materials 0.000 claims description 8
- 229910052724 xenon Inorganic materials 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- XIOSCRANHXMIII-UHFFFAOYSA-N CCC[SiH2]CCC Chemical compound CCC[SiH2]CCC XIOSCRANHXMIII-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- MMYRBBZVCDXGHG-UHFFFAOYSA-N tripropylsilicon Chemical compound CCC[Si](CCC)CCC MMYRBBZVCDXGHG-UHFFFAOYSA-N 0.000 claims description 6
- 238000010894 electron beam technology Methods 0.000 claims description 5
- CRJDTHXRHDQGBF-UHFFFAOYSA-N cyclohexyl(diethyl)silane Chemical compound CC[SiH](CC)C1CCCCC1 CRJDTHXRHDQGBF-UHFFFAOYSA-N 0.000 claims description 3
- JFDAGVJGHGSIEE-UHFFFAOYSA-N cyclopentyl(diethyl)silane Chemical compound CC[SiH](CC)C1CCCC1 JFDAGVJGHGSIEE-UHFFFAOYSA-N 0.000 claims description 3
- BVXJCKRUWQUGHP-UHFFFAOYSA-N dibutylsilicon Chemical compound CCCC[Si]CCCC BVXJCKRUWQUGHP-UHFFFAOYSA-N 0.000 claims description 3
- MHRJRZALUJMAED-UHFFFAOYSA-N diethyl(propyl)silane Chemical compound CCC[SiH](CC)CC MHRJRZALUJMAED-UHFFFAOYSA-N 0.000 claims description 3
- UCXUKTLCVSGCNR-UHFFFAOYSA-N diethylsilane Chemical compound CC[SiH2]CC UCXUKTLCVSGCNR-UHFFFAOYSA-N 0.000 claims description 3
- VKVSUBKIZLJSRT-UHFFFAOYSA-N ethyl(dipropyl)silane Chemical compound CCC[SiH](CC)CCC VKVSUBKIZLJSRT-UHFFFAOYSA-N 0.000 claims description 3
- ZGYICYBLPGRURT-UHFFFAOYSA-N tri(propan-2-yl)silicon Chemical compound CC(C)[Si](C(C)C)C(C)C ZGYICYBLPGRURT-UHFFFAOYSA-N 0.000 claims description 3
- ISEIIPDWJVGTQS-UHFFFAOYSA-N tributylsilicon Chemical compound CCCC[Si](CCCC)CCCC ISEIIPDWJVGTQS-UHFFFAOYSA-N 0.000 claims description 3
- 239000010408 film Substances 0.000 description 141
- 229910052799 carbon Inorganic materials 0.000 description 27
- 235000012431 wafers Nutrition 0.000 description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 24
- 239000002243 precursor Substances 0.000 description 23
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 20
- 239000000463 material Substances 0.000 description 20
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 18
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- 239000010703 silicon Substances 0.000 description 17
- 239000000126 substance Substances 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 150000001875 compounds Chemical class 0.000 description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 description 10
- 239000007788 liquid Substances 0.000 description 10
- 150000004820 halides Chemical class 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 238000000137 annealing Methods 0.000 description 8
- 239000012159 carrier gas Substances 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 239000001307 helium Substances 0.000 description 8
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 8
- 150000003377 silicon compounds Chemical class 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 238000003848 UV Light-Curing Methods 0.000 description 7
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 6
- NBBQQQJUOYRZCA-UHFFFAOYSA-N diethoxymethylsilane Chemical compound CCOC([SiH3])OCC NBBQQQJUOYRZCA-UHFFFAOYSA-N 0.000 description 6
- 238000005530 etching Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
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- 238000009835 boiling Methods 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
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- 150000002431 hydrogen Chemical class 0.000 description 5
- 229910052754 neon Inorganic materials 0.000 description 5
- 239000001272 nitrous oxide Substances 0.000 description 5
- 229910052756 noble gas Inorganic materials 0.000 description 5
- 150000002835 noble gases Chemical class 0.000 description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 5
- UUAHJDYTCBLNOM-UHFFFAOYSA-N 1-ethoxy-1-methylsilolane Chemical compound CCO[Si]1(C)CCCC1 UUAHJDYTCBLNOM-UHFFFAOYSA-N 0.000 description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
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- 239000000654 additive Substances 0.000 description 2
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 2
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- 239000011800 void material Substances 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/0805—Compounds with Si-C or Si-Si linkages comprising only Si, C or H atoms
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- C23C16/22—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 deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
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- 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
- C23C16/22—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 deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/42—Silicides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- 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
- C23C16/56—After-treatment
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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
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- 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
- H01L21/02126—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 containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC
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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
- H01L21/02205—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
- H01L21/02211—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 being a silane, e.g. disilane, methylsilane or chlorosilane
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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
- H01L21/02107—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
- H01L21/02104—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
- H01L21/02274—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 in the presence of a plasma [PECVD]
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- H01L21/02107—Forming insulating materials on a substrate
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- H01L21/02318—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment
- H01L21/02345—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment treatment by exposure to radiation, e.g. visible light
- H01L21/02348—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment treatment by exposure to radiation, e.g. visible light treatment by exposure to UV light
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Description
本出願は、2019年8月16日に提出された米国仮出願第62/888019号に対する優先権の利益を主張するものであり、その米国仮出願は、参照によって、その全体が本明細書に組み込まれる。
3ESから、以下のプロセス条件を使用して、200mmのSiウエハに、OSG膜を堆積した。1400mg/分の流量で直接液体注入(DLI)を介して反応チャンバーに前駆体を輸送し、200sccmのヘリウムキャリアガス流、60sccmのO2、ウエハ空間への350ミリインチのシャワーヘッド、390℃のウエハチャック温度、8Torrのチャンバー圧力で、700Wのプラズマを60秒間適用した。得た膜は、1.49の屈折率(RI)及び3.0の誘電率(k)であり、704nm厚さであった。膜の硬度は2.7GPaと測定され、ヤング率は16.3GPaであった。元素組成をXPSによって測定した。膜の組成は、32.7%C、36.6%O及び30.7%Siであった。
3ESから、以下のプロセス条件を使用して、200mmのSiウエハに、OSG膜を堆積した。1400mg/分の流量で直接液体注入(DLI)を介して反応チャンバーに前駆体を輸送し、200sccmのヘリウムキャリアガス流、60sccmのO2、ウエハ空間への350ミリインチのシャワーヘッド、390℃のウエハチャック温度、8Torrのチャンバー圧力で、700Wのプラズマを60秒間適用した。堆積の後に、ロードロックによって、UV硬化チャンバーへとウエハを取り出して、UV照射によって、400℃で4分間、膜を硬化した。得た膜は、1.48の屈折率(RI)及び3.0の誘電率(k)であり、646nm厚さであった。膜の硬度は3.2GPaと測定され、ヤング率は18.8GPaであった。元素組成をXPSによって測定し、膜の組成は、26.8%C、41.2%O及び32%Siであった。
3nPSから、以下のプロセス条件を使用して、200mmのSiウエハに、OSG膜を堆積した。1500mg/分の流量で直接液体注入(DLI)を介して反応チャンバーに3nPS前駆体を輸送し、200sccmのヘリウムキャリアガス流、60sccmのO2、ウエハ空間への350ミリインチのシャワーヘッド、390℃のウエハチャック温度、6Torrのチャンバー圧力で、600Wのプラズマを60秒間適用した。得た膜は、1.45の屈折率(RI)及び3.0の誘電率であり、528nm厚さであった。膜の硬度は2.6GPaと測定され、ヤング率は15.6GPaであった。元素組成をXPSによって測定し、膜の組成は、26.1%C、43.0%O及び30.9%Siであった。
3nPSから、以下のプロセス条件を使用して、200mmのSiウエハに、OSG膜を堆積した。1500mg/分の流量で、直接液体注入(DLI)を介して反応チャンバーに前駆体を輸送し、200sccmのヘリウムキャリアガス流、60sccmのO2、ウエハ空間への350ミリインチのシャワーヘッド、390℃のウエハチャック温度、6Torrのチャンバー圧力で、600Wのプラズマを60秒間適用した。堆積の後、ロードロックによって、UV硬化チャンバーへとウエハを移動し、UV照射によって、400℃で4分間、膜を硬化した。得た膜は、1.437の屈折率(RI)及び3.2の誘電率で、495nm厚さであった。膜の硬度は3.7GPaと測定され、ヤング率は23.4GPaであった。元素組成をXPSによって測定し、膜の組成は、18.8%C、49%O及び32.2%Siであった。
1-メチル-1-エトキシ-1-シラシクロペンタンから、200mmの処理のために、DxZチャンバー中で、以下のプロセス条件を使用して、OSG膜を堆積した。1500ミリグラム/分(mg/分)の流量で、直接液体注入(DLI)を介して反応チャンバーに前駆体を輸送し、200標準立方センチメートル(sccm)のヘリウムキャリアガス流、10sccmのO2、350ミリインチのシャワーヘッド/ウエハ空間、400℃のウエハチャック温度、7Torrのチャンバー圧力で、600Wのプラズマを適用した。得た堆積したままの膜は、3.03の誘電率(k)、2.69GPaの硬度(H)及び1.50の屈折率(RI)を有していた。
1-メチル-1-エトキシ-1-シラシクロペンタンから、200mmの処理のために、DxZチャンバー中で、以下のプロセス条件を使用して、OSG膜を堆積した。1000ミリグラム/分(mg/分)の流量で、直接液体注入(DLI)を介して反応チャンバーに前駆体を輸送し、200標準立方センチメートル(sccm)のヘリウムキャリアガス流、10sccmのO2、350ミリインチのシャワーヘッド/ウエハ空間、400℃のウエハチャック温度、7Torrのチャンバー圧力で、400Wのプラズマを適用した。得た堆積したままの膜は、3.01の誘電率(k)、2.06GPaの硬度(H)及び1.454の屈折率(RI)を有していた。UV硬化後には、kは3.05、Hは3.58GPa、RIは1.46であった。この例は、kの極めて小さい増加量での、機械強度の有意な改善を示している。
本発明の実施形態としては、以下の実施形態を挙げることができる。
(付記1)
誘電体膜を製造するための化学気相堆積方法であって、
基材を反応チャンバー中に提供する工程;
ガス状の試剤を前記反応チャンバー中に導入する工程であって、前記ガス状の試剤が、
R n H 4-n Siを含み、式中、Rが直鎖、分岐鎖又は環状のC 2 ~C 10 アルキルからなる群から選択され、nが2~3であるケイ素前駆体と、
少なくとも1つの酸素源と
を含む工程;及び
前記反応チャンバー中の前記ガス状の試剤にエネルギーを適用して、前記ガス状の試剤の反応を誘起して、それによって膜を前記基材に堆積するエネルギー適用工程
を含み、前記膜が約2.5~3.3の誘電率を有する、方法。
(付記2)
前記ケイ素前駆体が、トリエチルシラン、ジエチルシラン、トリ-n-プロピルシラン、ジ-n-プロピルシラン、エチルジ-n-プロピルシラン、ジエチル-n-プロピルシラン、ジ-n-プロピルシラン、ジ-n-ブチルシラン、トリ-n-ブチルシラン、トリ-イソ-プロピルシラン、ジエチルシクロペンチルシラン、ジエチルシクロヘキシルシランからなる群から選択される少なくとも1つである、付記1に記載の方法。
(付記3)
堆積方法が、プラズマ強化化学気相堆積方法である、付記1に記載の方法。
(付記4)
前記酸素源が、O 2 、N 2 O、NO、NO 2 、CO 2 、水、H 2 O 2 及びオゾンからなる群から選択される少なくとも1つを含む、付記1に記載の方法。
(付記5)
前記エネルギー適用工程の間に、He、Ar、N 2 、Kr、Xe、NH 3 、H 2 、CO 2 又はCOからなる群から選択される少なくとも1つのガスが、前記反応チャンバー中で前記ガス状の試剤と組み合わせられる、付記1に記載の方法。
(付記6)
堆積された膜にさらなるエネルギーを適用する工程をさらに含む、付記1に記載の方法。
(付記7)
前記さらなるエネルギーが、熱処理、紫外光(UV)処理、電子ビーム処理及びガンマ照射処理からなる群から選択される少なくとも1つである、付記6に記載の方法。
(付記8)
前記さらなるエネルギーがUV処理及び熱処理を含み、前記UV処理が、前記熱処理の少なくとも一部の間に行われる、付記7に記載の方法。
(付記9)
前記膜が、組成Si v O w C x H y F z を含み、式中、v+w+x+y+z=100%であり、vが10~35at%であり、wが10~65at%であり、xが5~40at%であり、yが10~50at%であり、zが0~15at%である、付記1に記載の方法。
(付記10)
化学気相堆積プロセスによって誘電体膜を製造するためのガス状の試剤であって、R n H 4-n Siを含み、式中、Rが直鎖、分岐鎖又は環状のC 2 ~C 10 アルキルからなる群から選択され、nが2~3であるケイ素前駆体を含み、100ppm以下のハライドイオン又は水を有する、ガス状の試剤。
(付記11)
1ppm以下のハライドイオン又は水を有する、付記10に記載のガス状の試剤。
Claims (11)
- 誘電体膜を製造するための化学気相堆積方法であって、
基材を反応チャンバー中に提供する工程;
ガス状の試剤を前記反応チャンバー中に導入する工程であって、前記ガス状の試剤が、
RnH4-nSiを含み、式中、Rが直鎖、分岐鎖又は環状のC2~C10アルキルからなる群から選択され、nが2~3であるケイ素前駆体と、
少なくとも1つの酸素源と
を含み、100ppm以下のハライドイオン又は水を有する、工程;及び
前記反応チャンバー中の前記ガス状の試剤にエネルギーを適用して、前記ガス状の試剤の反応を誘起して、それによって膜を前記基材に堆積するエネルギー適用工程
を含み、前記膜が約2.5~3.3の誘電率を有する、方法。 - 前記ケイ素前駆体が、トリエチルシラン、ジエチルシラン、トリ-n-プロピルシラン、ジ-n-プロピルシラン、エチルジ-n-プロピルシラン、ジエチル-n-プロピルシラン、ジ-n-プロピルシラン、ジ-n-ブチルシラン、トリ-n-ブチルシラン、トリ-イソ-プロピルシラン、ジエチルシクロペンチルシラン、ジエチルシクロヘキシルシランからなる群から選択される少なくとも1つである、請求項1に記載の方法。
- 堆積方法が、プラズマ強化化学気相堆積方法である、請求項1に記載の方法。
- 前記酸素源が、O2、N2O、NO、NO2、CO2、水、H2O2及びオゾンからなる群から選択される少なくとも1つを含む、請求項1に記載の方法。
- 前記エネルギー適用工程の間に、He、Ar、N2、Kr、Xe、NH3、H2、CO2又はCOからなる群から選択される少なくとも1つのガスが、前記反応チャンバー中で前記ガス状の試剤と組み合わせられる、請求項1に記載の方法。
- 堆積された膜にさらなるエネルギーを適用する工程をさらに含む、請求項1に記載の方法。
- 前記さらなるエネルギーが、熱処理、紫外光(UV)処理、電子ビーム処理及びガンマ照射処理からなる群から選択される少なくとも1つである、請求項6に記載の方法。
- 前記さらなるエネルギーがUV処理及び熱処理を含み、前記UV処理が、前記熱処理の少なくとも一部の間に行われる、請求項7に記載の方法。
- 前記膜が、組成SivOwCxHyFzを含み、式中、v+w+x+y+z=100%であり、vが10~35at%であり、wが10~65at%であり、xが5~40at%であり、yが10~50at%であり、zが0~15at%である、請求項1に記載の方法。
- 化学気相堆積プロセスによって誘電体膜を製造するためのガス状の試剤であって、RnH4-nSiを含み、式中、Rが直鎖、分岐鎖又は環状のC2~C10アルキルからなる群から選択され、nが2~3であるケイ素前駆体を含み、100ppm以下のハライドイオン又は水を有する、ガス状の試剤。
- 1ppm以下のハライドイオン又は水を有する、請求項10に記載のガス状の試剤。
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US6303523B2 (en) * | 1998-02-11 | 2001-10-16 | Applied Materials, Inc. | Plasma processes for depositing low dielectric constant films |
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