JP2012513117A - 低温ギャップフィル改善のための酸化シリコンcvdへの前駆体添加 - Google Patents
低温ギャップフィル改善のための酸化シリコンcvdへの前駆体添加 Download PDFInfo
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- 239000002243 precursor Substances 0.000 title claims abstract description 104
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910052814 silicon oxide Inorganic materials 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 claims abstract description 91
- 239000007789 gas Substances 0.000 claims abstract description 89
- 239000000758 substrate Substances 0.000 claims abstract description 72
- 238000012545 processing Methods 0.000 claims abstract description 50
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000654 additive Substances 0.000 claims abstract description 43
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 43
- 239000010703 silicon Substances 0.000 claims abstract description 43
- 230000000996 additive effect Effects 0.000 claims abstract description 40
- 238000000151 deposition Methods 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000001590 oxidative effect Effects 0.000 claims abstract description 17
- 230000008021 deposition Effects 0.000 claims description 30
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 20
- UHUUYVZLXJHWDV-UHFFFAOYSA-N trimethyl(methylsilyloxy)silane Chemical compound C[SiH2]O[Si](C)(C)C UHUUYVZLXJHWDV-UHFFFAOYSA-N 0.000 claims description 17
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims description 16
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 229910018540 Si C Inorganic materials 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 238000005229 chemical vapour deposition Methods 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 4
- 229910018557 Si O Inorganic materials 0.000 claims description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims description 2
- 150000003961 organosilicon compounds Chemical class 0.000 claims 5
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims 2
- 238000009499 grossing Methods 0.000 claims 1
- 230000001737 promoting effect Effects 0.000 claims 1
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
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- 238000002310 reflectometry Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004630 atomic force microscopy Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
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- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000005247 gettering Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- 238000000427 thin-film deposition Methods 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- AJSTXXYNEIHPMD-UHFFFAOYSA-N triethyl borate Chemical compound CCOB(OCC)OCC AJSTXXYNEIHPMD-UHFFFAOYSA-N 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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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
- H01L21/314—Inorganic layers
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
- H01L21/31604—Deposition from a gas or vapour
- H01L21/31608—Deposition of SiO2
- H01L21/31612—Deposition of SiO2 on a silicon body
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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
- 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
- C23C16/22—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
- C23C16/40—Oxides
- C23C16/401—Oxides containing silicon
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- 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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- H01L21/02107—Forming insulating materials on a substrate
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- 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
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- 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
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- 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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- H01L21/02107—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
- H01L21/02219—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 nitrogen
- H01L21/02222—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 nitrogen the compound being a silazane
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- 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
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
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- H01L21/02107—Forming insulating materials on a substrate
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- 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
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Abstract
Description
本出願は、2008年12月18日に出願した「PRECURSOR ADDITION TO SILICON OXIDE CVD FOR IMPROVED LOW TEMPERATURE GAPFILL」という名称のVenkataraman他による米国特許仮出願番号第61/138864号の利点を主張し、この出願は、すべての目的のためにその全体が本明細書中に取り込まれている。
本発明の実施形態による半導体処理システムを作ることができ、そのシステムを使用する方法である場合がある説明した変形例が分かると、半導体処理ツール409内の例示的な半導体処理チャンバ410の簡略化した図を図示する図4Aに注意が向けられる。このシステムは、CVDプロセスならびにリフロープロセス、ドライブインプロセス、クリーニングプロセス、エッチングプロセス、およびゲッタリングプロセスなどの他のプロセスを含むことができる様々な半導体処理ステップを実行することに適している。また、チャンバから基板を取り出さずに、一枚の基板上で複数のステップを含むプロセスを実行することができる。システムの代表的な主な構成要素は、ガス配送システム489、ポンピングシステム488、遠隔プラズマシステム(RPS)455、および制御システム453からプロセスガスおよびその他のガスを受け取るチャンバ内室415を含む。本発明を理解するために、これらの構成要素および他の構成要素を下記に説明する。
Claims (30)
- 処理チャンバ内の基板上に酸化シリコン層を形成するための方法であって、
前記処理チャンバ中にシリコン含有前駆体を流入させ、酸化性ガスを流入させることと、
前記処理チャンバ中に添加剤前駆体を流入させることと、
化学気相成長法によって前記シリコン含有前駆体、前記酸化性ガス、および前記添加剤前駆体から前記基板上に前記酸化シリコン層を形成することであって、前記添加剤前駆体によって前記基板全域にわたり前記酸化シリコン層の一様な成長速度が助長され、前記酸化シリコン層の粗さが低減されることと
を含む方法。 - 前記処理チャンバ中に水を流入させるステップをさらに含む、請求項1に記載の方法。
- 前記基板が、表面上にトレンチが形成されたパターン形成基板であり、前記酸化シリコン層を形成することにより、添加剤前駆体を流入させる工程を行わずに酸化シリコン層を形成した場合と比較して、ボイドの数が少ないおよび/またはサイズが小さい酸化シリコンで前記トレンチが埋められる、請求項1に記載の方法。
- 前記基板が、シリコン表面、窒化シリコン表面、および上に前記酸化シリコン層が形成される酸化シリコン表面を備える、請求項1に記載の方法。
- 前記シリコン含有前駆体が、オルトケイ酸テトラエチル(TEOS)、テトラメトキシシラン(TMOS)、またはテトラエトキシシラン(TRIES)を含む、請求項1に記載の方法。
- 前記酸化性ガスがオゾン(O3)を含む、請求項1に記載の方法。
- 前記添加剤前駆体が平滑化用前駆体である、請求項1に記載の方法。
- 前記添加剤前駆体が、少なくとも一のSi−C結合を含む有機シリコン化合物を含む、請求項1に記載の方法。
- 前記有機シリコン化合物が、テトラメチルジシロキサン(TMDSO)である、請求項8に記載の方法。
- 前記有機シリコン化合物が、ヘキサメチルジシラザン(HMDS)である、請求項8に記載の方法。
- 前記方法が、前記酸化シリコン層の形成中に前記処理チャンバ中に水蒸気を流入させることをさらに含む、請求項1に記載の方法。
- 前記シリコン含有前駆体の流量を、前記酸化シリコン層の形成中に増加させる、請求項1に記載の方法。
- 前記基板の温度を600℃未満に調節することをさらに含む、請求項1に記載の方法。
- 前記基板を、約300℃〜約450℃の温度範囲に調節する、請求項13に記載の方法。
- 前記基板を、約300℃未満の温度に調節する、請求項13に記載の方法。
- 前記処理チャンバ内の圧力を、700torr未満に調節する、請求項1に記載の方法。
- 前記有機シリコン化合物の流量が、前記酸化シリコン層の堆積中に毎分約1mg以上である、請求項9に記載の方法。
- 前記有機シリコン化合物の流量が、前記酸化シリコン層の堆積中に毎分約50mg以下である、請求項9に記載の方法。
- 水蒸気の流量が、前記酸化シリコン層の堆積中に約3000sccm以上である、請求項11に記載の方法。
- 酸化シリコンでトレンチを埋めるための方法であって、前記トレンチが処理チャンバ内の基板上にあり、
前記処理チャンバ中に、少なくとも一のSi−O結合を含む第1のシリコン含有前駆体を流入させることと、
前記チャンバ中に酸化性前駆体を流入させることと、
前記チャンバ中に、少なくとも一のSi−C結合を含む第2のシリコン含有前駆体を流入させることと、
化学気相成長法によって、前記第1のシリコン含有前駆体、前記第2のシリコン含有前駆体、および前記酸化性前駆体を用いて前記トレンチ中に前記酸化シリコンを堆積させることであって、前記第2の前駆体が成長速度を均等にすることにより、堆積後に前記トレンチ内に残るボイドのサイズおよび/または数が低減されることと
を含む方法。 - 前記第1のシリコン含有前駆体を流入させる工程が、オルトケイ酸テトラエチル(TEOS)を流入させることを含む、請求項20に記載の方法。
- TEOSの流量が、前記酸化シリコンの堆積中に毎分約1mg以上である、請求項21に記載の方法。
- 前記酸化性前駆体を流入させる工程が、オゾン(O3)、酸素(O2)、および酸素ラジカル(O)から成る群から選択される少なくとも一の前駆体を流入させることを含む、請求項20に記載の方法。
- 前記酸化シリコン層の形成中に前記処理チャンバ中に水蒸気を流入させることをさらに含む、請求項20に記載の方法。
- 前記第2のシリコン含有前駆体が、テトラメチルジシロキサン(TMDSO)を含む、請求項20に記載の方法。
- 前記第2のシリコン含有前駆体を流入させることが、前記酸化シリコンの堆積中に毎分約1mgよりも大きな流量でテトラメチルジシロキサン(TMDSO)を流入させることを含む、請求項20に記載の方法。
- 前記第2のシリコン含有前駆体の前記流量を、前記酸化シリコンの堆積中に増加させる、請求項25に記載の方法。
- 前記第2のシリコン含有前駆体がヘキサメチルジシラザン(HMDS)を含む、請求項20に記載の方法。
- 前記第2のシリコン含有前駆体を流入させることが、前記酸化シリコンの堆積中に毎分約1mgよりも大きな流量でヘキサメチルジシラザン(HMDS)を流入させることを含む、請求項20に記載の方法。
- 前記第2のシリコン含有前駆体の前記流量を、前記酸化シリコンの堆積中に増加させる、請求項28に記載の方法。
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