JP2009016813A - 微細パターンの形成方法 - Google Patents
微細パターンの形成方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 59
- 239000010408 film Substances 0.000 claims abstract description 228
- 239000010409 thin film Substances 0.000 claims abstract description 75
- 125000006850 spacer group Chemical group 0.000 claims abstract description 32
- 229910003697 SiBN Inorganic materials 0.000 claims abstract description 22
- 238000000206 photolithography Methods 0.000 claims abstract description 12
- 238000005530 etching Methods 0.000 claims description 35
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 15
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 12
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 9
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 238000001039 wet etching Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 5
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- RPAJSBKBKSSMLJ-DFWYDOINSA-N (2s)-2-aminopentanedioic acid;hydrochloride Chemical class Cl.OC(=O)[C@@H](N)CCC(O)=O RPAJSBKBKSSMLJ-DFWYDOINSA-N 0.000 claims 1
- 230000001850 reproductive effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 29
- 239000004065 semiconductor Substances 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- 229920002120 photoresistant polymer Polymers 0.000 description 6
- 238000000151 deposition Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- 229920005591 polysilicon Polymers 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- CGRVKSPUKAFTBN-UHFFFAOYSA-N N-silylbutan-1-amine Chemical compound CCCCN[SiH3] CGRVKSPUKAFTBN-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
- 230000008021 deposition Effects 0.000 description 2
- WZUCGJVWOLJJAN-UHFFFAOYSA-N diethylaminosilicon Chemical compound CCN([Si])CC WZUCGJVWOLJJAN-UHFFFAOYSA-N 0.000 description 2
- AWFPGKLDLMAPMK-UHFFFAOYSA-N dimethylaminosilicon Chemical compound CN(C)[Si] AWFPGKLDLMAPMK-UHFFFAOYSA-N 0.000 description 2
- CWAFVXWRGIEBPL-UHFFFAOYSA-N ethoxysilane Chemical compound CCO[SiH3] CWAFVXWRGIEBPL-UHFFFAOYSA-N 0.000 description 2
- -1 for example Chemical compound 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002052 molecular layer Substances 0.000 description 2
- 150000002926 oxygen Chemical class 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 2
- BIVNKSDKIFWKFA-UHFFFAOYSA-N N-propan-2-yl-N-silylpropan-2-amine Chemical compound CC(C)N([SiH3])C(C)C BIVNKSDKIFWKFA-UHFFFAOYSA-N 0.000 description 1
- UOERHRIFSQUTET-UHFFFAOYSA-N N-propyl-N-silylpropan-1-amine Chemical compound CCCN([SiH3])CCC UOERHRIFSQUTET-UHFFFAOYSA-N 0.000 description 1
- 229910017855 NH 4 F Inorganic materials 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- 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
- H01L21/027—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
-
- 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
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3083—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/3086—Chemical or electrical treatment, e.g. electrolytic etching using masks 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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- 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
- G03F7/0035—Multiple processes, e.g. applying a further resist layer on an already in a previously step, processed pattern or textured surface
-
- 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
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
-
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- 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
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3083—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/3088—Process specially adapted to improve the resolution of the mask
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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
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32139—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer using masks
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66787—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a gate at the side of the channel
- H01L29/66795—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a gate at the side of the channel with a horizontal current flow in a vertical sidewall of a semiconductor body, e.g. FinFET, MuGFET
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Abstract
【解決手段】 薄膜2上に、この薄膜2とは異なる膜からなり、かつ、SiBNからなる犠牲膜3を形成し、犠牲膜3を、フォトリソグラフィ技術を用いて、所定の間隔を持つパターンに加工し、加工された犠牲膜3の側壁上に、犠牲膜3及び薄膜2とは異なる膜からなる側壁スペーサ5´を形成し、加工された犠牲膜3を除去し、側壁スペーサ5´をマスクに用いて、薄膜2を加工する。
【選択図】図5
Description
図1乃至図7は、この発明の第1の実施形態に係る微細パターンの形成方法を主要な製造工程毎に示す断面図である。
H3PO4)が利用される。この他に、SC−1(アンモニアと過酸化水素水との混合液)を含むエッチャント、FPM(HF/H2O/H2O2:弗酸と過酸化水素水とを含む混合液)を含むエッチャント、BHF(NH4F/HF/H2:弗酸とフッ化アンモニウムとを含む混合液)を含むエッチャントを用いてエッチングすることもできる。
Layer Deposition)法を用いて、分子層レベルで極薄く堆積したMLD-SiO2である。膜5を、極薄く堆積することで、犠牲膜3の側壁上にある膜5の厚さは、露光装置の解像限界以下の幅Wssにできる。MLD法の基本的な成膜技術は、本件特許出願人による特許出願(出願番号:特願2006−265818)に記載されており、例えば、有機シリコンを含むソースガスと活性化された酸素種とを交互に供給しながら堆積していく。有機シリコンを含むソースガスの例は、エトキシシランガス、及びアミノシランガスである。エトキシシランとしては、例えば、TEOS(テトラエトキシシラン)を利用することができる。また、アミノシランガスとしては、例えば、TDMAS(トリジメチルアミノシラン)、BTBAS(ビスターシャリブチルアミノシラン)、BDMAS(ビスジメチルアミノシラン)、BDEAS(ビスジエチルアミノシラン)、DMAS(ジメチルアミノシラン)、DEAS(ジエチルアミノシラン)、DPAS(ジプロピルアミノシラン)、BAS(ブチルアミノシラン)、DIPAS(ジイソプロピルアミノシラン)、及びBEMAS(ビスエチルメチルアミノシラン)、を利用することができる。
H3PO4)である。この他に、SC−1(アンモニアと過酸化水素水との混合液)を含むエッチャントを用いてエッチングすることもできる。犠牲膜3の除去にウェットエッチングを利用することで、犠牲膜3の除去が容易となる、という利点を得ることができる。
図9乃至図16は、この発明の第2の実施形態に係る微細パターンの形成方法を主要な製造工程毎に示す断面図である。
2;薄膜
3;犠牲膜
4;レジストパターン
5;膜
5´;側壁スペーサ
6;エッチングストッパ膜
7;ハードマスク膜
Claims (7)
- 基板上に、薄膜を形成する工程と、
前記薄膜上に、この薄膜とは異なる膜からなり、かつ、SiBNからなる犠牲膜を形成する工程と、
前記犠牲膜を、フォトリソグラフィ技術を用いて、所定の間隔を持つパターンに加工する工程と、
前記加工された犠牲膜の側壁上に、この犠牲膜及び前記薄膜とは異なる膜からなる側壁スペーサを形成する工程と、
前記加工された犠牲膜を除去する工程と、
前記側壁スペーサをマスクに用いて、前記薄膜を加工する工程と、
を具備することを特徴とする微細パターンの形成方法。 - 前記薄膜は、シリコンを含む導電膜、又はSiO2系の絶縁膜であることを特徴とする請求項1に記載の微細パターンの形成方法。
- 基板上に、第1の薄膜を形成する工程と、
前記第1の薄膜上に、この第1の薄膜とは異なる膜からなる第2の薄膜を形成する工程と、
前記第2の薄膜上に、この第2の薄膜とは異なる膜からなるハードマスク膜を形成する工程と、
前記ハードマスク膜上に、SiBNからなる犠牲膜を形成する工程と、
前記犠牲膜を、フォトリソグラフィ技術を用いて、所定の間隔を持つパターンに加工する工程と、
前記加工された犠牲膜の側壁上に、この犠牲膜及び前記ハードマスク膜とは異なる膜からなる側壁スペーサを形成する工程と、
前記犠牲膜を除去する工程と、
前記側壁スペーサをマスクに用いて、前記ハードマスク膜を加工する工程と、
前記ハードマスク膜をマスクに用いて、前記第2の薄膜を加工する工程と、
を具備することを特徴とする微細パターンの形成方法。 - 前記第2の薄膜は、シリコンを含む導電膜、又はSiO2系の絶縁膜であることを特徴とする請求項3に記載の微細パターンの形成方法。
- 前記第1の薄膜は、エッチングストッパ膜であることを特徴とする請求項3又は請求項4に記載の微細パターンの形成方法。
- 前記SiBNからなる犠牲膜は、リン酸を含むウェットエッチング、又はアンモニアと過酸化水素水との混合液を含むウェットエッチング、又は弗酸と過酸化水素水との混合液を含むウェットエッチング、又は弗酸とフッ化アンモニウムとの混合液を含むウェットエッチングを用いて除去することを特徴とする請求項1乃至請求項5いずれか一項に記載の微細パターンの形成方法。
- 前記所定の間隔は、前記フォトリソグラフィ技術で使用される露光装置の解像限界であることを特徴とする請求項1乃至請求項6いずれか一項に記載の微細パターンの形成方法。
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WO2017217087A1 (ja) * | 2016-06-14 | 2017-12-21 | 東京エレクトロン株式会社 | 基板処理方法及び硼素添加珪素の除去方法 |
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JP5275094B2 (ja) * | 2009-03-13 | 2013-08-28 | 東京エレクトロン株式会社 | 基板処理方法 |
JP2011040561A (ja) * | 2009-08-11 | 2011-02-24 | Tokyo Electron Ltd | 半導体装置の製造方法。 |
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WO2017217087A1 (ja) * | 2016-06-14 | 2017-12-21 | 東京エレクトロン株式会社 | 基板処理方法及び硼素添加珪素の除去方法 |
CN109328392A (zh) * | 2016-06-14 | 2019-02-12 | 东京毅力科创株式会社 | 基板处理方法及硼掺杂硅的去除方法 |
CN109328392B (zh) * | 2016-06-14 | 2023-09-05 | 东京毅力科创株式会社 | 基板处理方法及硼掺杂硅的去除方法 |
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US20100112796A1 (en) | 2010-05-06 |
TWI376745B (en) | 2012-11-11 |
US7754622B2 (en) | 2010-07-13 |
TW200915418A (en) | 2009-04-01 |
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