JP6584347B2 - 成膜方法 - Google Patents
成膜方法 Download PDFInfo
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- JP6584347B2 JP6584347B2 JP2016040217A JP2016040217A JP6584347B2 JP 6584347 B2 JP6584347 B2 JP 6584347B2 JP 2016040217 A JP2016040217 A JP 2016040217A JP 2016040217 A JP2016040217 A JP 2016040217A JP 6584347 B2 JP6584347 B2 JP 6584347B2
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- gas
- plasma
- film
- substrate
- turntable
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- 238000000151 deposition Methods 0.000 title claims description 9
- 238000012545 processing Methods 0.000 claims description 162
- 229910017840 NH 3 Inorganic materials 0.000 claims description 87
- 238000000034 method Methods 0.000 claims description 45
- 238000005121 nitriding Methods 0.000 claims description 31
- 239000000758 substrate Substances 0.000 claims description 30
- 238000010926 purge Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 264
- 239000010408 film Substances 0.000 description 111
- 238000000926 separation method Methods 0.000 description 36
- 230000000052 comparative effect Effects 0.000 description 30
- 150000002500 ions Chemical class 0.000 description 16
- 230000002093 peripheral effect Effects 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 10
- 238000009826 distribution Methods 0.000 description 9
- 150000004767 nitrides Chemical class 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000000231 atomic layer deposition Methods 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- 238000002407 reforming Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000002052 molecular layer Substances 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101000735417 Homo sapiens Protein PAPPAS Proteins 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 102100034919 Protein PAPPAS Human genes 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- SEQDDYPDSLOBDC-UHFFFAOYSA-N Temazepam Chemical compound N=1C(O)C(=O)N(C)C2=CC=C(Cl)C=C2C=1C1=CC=CC=C1 SEQDDYPDSLOBDC-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 210000000746 body region Anatomy 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 230000004044 response Effects 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
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- LXEXBJXDGVGRAR-UHFFFAOYSA-N trichloro(trichlorosilyl)silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)Cl LXEXBJXDGVGRAR-UHFFFAOYSA-N 0.000 description 1
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 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
- H01L21/02274—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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- 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
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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
- C23C16/34—Nitrides
- C23C16/345—Silicon nitride
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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
- C23C16/24—Deposition of silicon only
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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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- C—CHEMISTRY; METALLURGY
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- 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
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- 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
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Description
前記基板の表面にパージガスを供給する工程と、
前記基板の前記表面に窒化ガスを第1のプラズマにより活性化して供給し、前記基板の前記表面上に吸着した前記Si含有ガスを窒化し、SiN膜を堆積させる工程と、
前記基板の前記表面にNH3及びN2をN 2 がNH 3 の3倍以上の比率で含む改質ガスを第2のプラズマにより活性化して供給し、前記基板の前記表面上に堆積した前記SiN膜を改質する工程と、
前記基板の表面にパージガスを供給する工程と、を有し、
前記基板は、処理室内に設けられた回転テーブルの表面上に周方向に沿って載置され、
前記処理室内の前記回転テーブルの上方には、前記回転テーブルの回転方向に沿って順に配置されたSi含有ガス供給領域、第1のパージガス供給領域、窒化ガス供給領域、改質ガス供給領域及び第2のパージガス供給領域が設けられ、
前記回転テーブルを1回転させることにより、前記基板が前記Si含有ガス供給領域、前記第1のパージガス供給領域、前記窒化ガス供給領域、前記改質ガス供給領域及び前記第2のパージガス供給領域を通過することにより、前記Si含有ガスを吸着させる工程、前記パージガスを供給する工程、前記SiN膜を堆積させる工程、前記SiN膜を改質する工程及び前記パージガスを供給する工程を1サイクル行い、前記回転テーブルを連続的に複数回回転させることにより、前記1サイクルを複数回繰り返す。
図1に、本発明の実施形態に係る成膜方法を実施する成膜装置の一例の概略縦断面図を示す。また、図2に、本発明の実施形態に係る成膜方法を実施する成膜装置の一例の概略平面図を示す。なお、図2では、説明の便宜上、天板11の描画を省略している。
次に、本発明の実施形態に係る成膜方法について説明する。本発明の実施形態に係る成膜方法は、ALD法(Atomic Layer Deposition、原子層堆積法)又はMLD法(Molecular Layer Deposition、分子層堆積法)による成膜が可能な成膜装置であれば、種々の成膜装置により実施することができるが、本実施形態では、上述の回転テーブル式の成膜装置を用いて実施する例について説明する。
N2⇔2N* (2)
2つのガスがプラズマ中に存在する場合には、以下の式(3)〜(5)に示すように、N*がH*と反応することで、NH*、NH2 *の双方が発生し、窒化力が増加するとともに、式(1)、(2)の可逆反応を防ぐ。
NH*+H*→NH2 * (4)
NH2 *+H*→NH3 (5)
よって、式(6)に示されるように、結果的には、NH3にN2を添加してプラズマにより活性化することにより、窒化力を増加させる方向に作用する。
かかるメカ二ズムを利用し、本実施形態では、改質用の第2のプラズマ処理用ガスとして、NH3とN2との混合ガスを用い、窒化力を高め、膜質を向上させる。
次に、本発明の実施形態に係る成膜方法を実施した実施例について説明する。まず、実施例に用いた成膜装置は、上述の実施形態で説明した回転テーブル式の2つのプラズマ発生器81a、81bを搭載したALD成膜装置である。
2 回転テーブル
24 凹部
31 原料ガスノズル
32 第1のプラズマ処理用ガスノズル
33 第2のプラズマ処理用ガスノズル
41、42 分離ガスノズル
81a、81b プラズマ発生器
83 アンテナ
90 筐体
P1、P2、P3 処理領域
T トレンチ
W ウエハ
Claims (8)
- 基板の表面にSi含有ガスを供給し、前記基板の前記表面に前記Si含有ガスを吸着させる工程と、
前記基板の表面にパージガスを供給する工程と、
前記基板の前記表面に窒化ガスを第1のプラズマにより活性化して供給し、前記基板の前記表面上に吸着した前記Si含有ガスを窒化し、SiN膜を堆積させる工程と、
前記基板の前記表面にNH3及びN2をN 2 がNH 3 の3倍以上の比率で含む改質ガスを第2のプラズマにより活性化して供給し、前記基板の前記表面上に堆積した前記SiN膜を改質する工程と、
前記基板の表面にパージガスを供給する工程と、を有し、
前記基板は、処理室内に設けられた回転テーブルの表面上に周方向に沿って載置され、
前記処理室内の前記回転テーブルの上方には、前記回転テーブルの回転方向に沿って順に配置されたSi含有ガス供給領域、第1のパージガス供給領域、窒化ガス供給領域、改質ガス供給領域及び第2のパージガス供給領域が設けられ、
前記回転テーブルを1回転させることにより、前記基板が前記Si含有ガス供給領域、前記第1のパージガス供給領域、前記窒化ガス供給領域、前記改質ガス供給領域及び前記第2のパージガス供給領域を通過することにより、前記Si含有ガスを吸着させる工程、前記パージガスを供給する工程、前記SiN膜を堆積させる工程、前記SiN膜を改質する工程及び前記パージガスを供給する工程を1サイクル行い、前記回転テーブルを連続的に複数回回転させることにより、前記1サイクルを複数回繰り返す成膜方法。 - 前記窒化ガスは、NH3含有ガスである請求項1に記載の成膜方法。
- 前記窒化ガスは、N2を含まないガスである請求項2に記載の成膜方法。
- 前記窒化ガスは、更にAr及びH2を含む請求項2又は3に記載の成膜方法。
- 前記改質ガスは、更にArを含む請求項1乃至4のいずれか一項に記載の成膜方法。
- 前記第2のプラズマは、前記第1のプラズマよりも前記基板の前記表面に近い位置で発生させられる請求項1乃至5のいずれか一項に記載の成膜方法。
- 前記Si含有ガスを吸着させる工程、前記SiN膜を堆積させる工程及び前記SiN膜を改質する工程を順次繰り返し、前記基板の前記表面上に前記SiN膜を所定の膜厚まで堆積させる請求項1乃至6のいずれか一項に記載の成膜方法。
- 前記窒化ガス供給領域の上方の前記処理室の外部には第1のプラズマ発生器が設けられ、
前記改質ガス供給領域の上方の前記処理室の外部には第2のプラズマ発生器が設けられ、
前記第2のプラズマ発生器は、前記第1のプラズマ発生器よりも低い位置に設けられている請求項1乃至7のいずれか一項に記載の成膜方法。
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TW106106301A TWI675933B (zh) | 2016-03-02 | 2017-02-24 | 成膜方法 |
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US9564309B2 (en) | 2013-03-14 | 2017-02-07 | Asm Ip Holding B.V. | Si precursors for deposition of SiN at low temperatures |
US9576792B2 (en) | 2014-09-17 | 2017-02-21 | Asm Ip Holding B.V. | Deposition of SiN |
US10410857B2 (en) | 2015-08-24 | 2019-09-10 | Asm Ip Holding B.V. | Formation of SiN thin films |
US20170218517A1 (en) * | 2016-02-01 | 2017-08-03 | Tokyo Electron Limited | Method of forming nitride film |
US10580645B2 (en) * | 2018-04-30 | 2020-03-03 | Asm Ip Holding B.V. | Plasma enhanced atomic layer deposition (PEALD) of SiN using silicon-hydrohalide precursors |
KR102675856B1 (ko) * | 2020-01-20 | 2024-06-17 | 에이에스엠 아이피 홀딩 비.브이. | 박막 형성 방법 및 박막 표면 개질 방법 |
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US10580645B2 (en) * | 2018-04-30 | 2020-03-03 | Asm Ip Holding B.V. | Plasma enhanced atomic layer deposition (PEALD) of SiN using silicon-hydrohalide precursors |
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