JP2017055047A - パターン形成方法 - Google Patents
パターン形成方法 Download PDFInfo
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- JP2017055047A JP2017055047A JP2015179535A JP2015179535A JP2017055047A JP 2017055047 A JP2017055047 A JP 2017055047A JP 2015179535 A JP2015179535 A JP 2015179535A JP 2015179535 A JP2015179535 A JP 2015179535A JP 2017055047 A JP2017055047 A JP 2017055047A
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- 238000000034 method Methods 0.000 title claims abstract description 64
- 229920001400 block copolymer Polymers 0.000 claims abstract description 57
- 229920000642 polymer Polymers 0.000 claims abstract description 44
- 238000000926 separation method Methods 0.000 claims abstract description 29
- 238000005530 etching Methods 0.000 claims abstract description 12
- 238000006386 neutralization reaction Methods 0.000 abstract description 11
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 60
- 239000004926 polymethyl methacrylate Substances 0.000 description 59
- 239000004793 Polystyrene Substances 0.000 description 47
- 239000007789 gas Substances 0.000 description 32
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 238000001020 plasma etching Methods 0.000 description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 6
- 229910001882 dioxygen Inorganic materials 0.000 description 6
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 6
- 238000005191 phase separation Methods 0.000 description 6
- 229920002120 photoresistant polymer Polymers 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000002408 directed self-assembly Methods 0.000 description 4
- 239000001307 helium Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001459 lithography Methods 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007261 regionalization Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001127 nanoimprint lithography Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
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- 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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
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- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00015—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems
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- 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
- G03F7/0002—Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping
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- G03F7/002—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor using materials containing microcapsules; Preparing or processing such materials, e.g. by pressure; Devices or apparatus specially designed therefor
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- G—PHYSICS
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- 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
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- 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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- 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
- G03F7/16—Coating processes; Apparatus therefor
- G03F7/165—Monolayers, e.g. Langmuir-Blodgett
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- 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
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2002—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image
- G03F7/2014—Contact or film exposure of light sensitive plates such as lithographic plates or circuit boards, e.g. in a vacuum frame
- G03F7/2016—Contact mask being integral part of the photosensitive element and subject to destructive removal during post-exposure processing
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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
- H01L21/02112—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
- H01L21/02118—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 carbon based polymeric organic or inorganic material, e.g. polyimides, poly cyclobutene or PVC
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02318—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment
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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
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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
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- 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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- 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
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- H01L21/311—Etching the insulating layers by chemical or physical means
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- B81—MICROSTRUCTURAL TECHNOLOGY
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- B81C2201/01—Manufacture or treatment of microstructural devices or systems in or on a substrate
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Abstract
Description
図1(a)〜図4(h)は、第1の実施形態に係るパターン形成方法を模式的に示した断面図である。以下、図1(a)〜図4(h)を参照して、本実施形態のパターン形成方法を説明する。
図6(a)〜図9(h)は、第2の実施形態に係るパターン形成方法を模式的に示した断面図である。なお、基本的な事項は上述した第1の実施形態と類似しているため、第1の実施形態で説明した事項の説明は省略する。
下地膜上にレジストパターンを形成する工程と、
前記レジストパターンをマスクとして用いて前記下地膜をエッチングして前記下地膜に凹部を形成する工程と、
前記下地膜に凹部を形成した後に前記レジストパターンをスリミングする工程と、
前記下地膜の前記スリミングされたレジストパターンで覆われていない領域上に第1のポリマー及び第2のポリマーに対して親和性を有する中性化膜を形成する工程と、
前記スリミングされたレジストパターン上及び前記中性化膜上に、前記第1のポリマー及び前記第2のポリマーを含むブロックコポリマー膜を形成する工程と、
前記ブロックコポリマー膜に対してミクロ相分離を行い、前記第1のポリマーで形成された第1の部分と前記第2のポリマーで形成された第2の部分とが配置されたミクロ相分離パターンを形成する工程と、
前記第1の部分及び前記第2の部分の一方を除去する工程と、
を備えることを特徴とするパターン形成方法。
前記第1の部分と前記第2の部分とは交互に配置されている
ことを特徴とする付記1に記載のパターン形成方法。
前記スリミングされたレジストパターン上には前記第1の部分が配置される
ことを特徴とする付記1に記載のパターン形成方法。
前記スリミングされたレジストパターンの表面は、前記第2のポリマーよりも前記第1のポリマーに対して高い親和性を有する
ことを特徴とする付記1に記載のパターン形成方法。
前記レジストパターンをスリミングする工程は、酸素ガス、窒素ガス、水素ガス、アルゴンガス、ヘリウムガス及び臭化水素ガスの少なくとも1つを含むガスを用いて行われる
ことを特徴とする付記1に記載のパターン形成方法。
前記レジストパターンをスリミングする工程は、酸素ガスと、窒素ガス、水素ガス、アルゴンガス、ヘリウムガス及び臭化水素ガスの少なくとも1つのガスとを含む混合ガスを用いて行われる
ことを特徴とする付記1に記載のパターン形成方法。
前記スリミングされたレジストパターンの表面に対して、前記第1のポリマーに対する親和性を高める処理を行う工程を、さらに備える
ことを特徴とする付記1に記載のパターン形成方法。
前記処理は、前記スリミングされたレジストパターンの表面に所定の物質をデポジションすることを含む
ことを特徴とする付記7に記載のパターン形成方法。
前記所定の物質は、炭素及びフッ素を含有する
ことを特徴とする付記8に記載のパターン形成方法。
前記第1のポリマーはPMMA(polymethyl methacrylate)であり、前記第2のポリマーはPS(polystyrene)である
ことを特徴とする付記1に記載のパターン形成方法。
前記ミクロ相分離パターンを形成する工程は、前記ブロックコポリマー膜に対して熱処理を施すことを含む
ことを特徴とする付記1に記載のパターン形成方法。
前記レジストパターンは、ネガ型レジストで形成されている
ことを特徴とする付記1に記載のパターン形成方法。
前記第1の部分及び前記第2の部分の一方を除去しラインアンドスペースパターンを形成する
ことを特徴とする付記1に記載のパターン形成方法。
前記レジストパターンはラインアンドスペースパターンである
ことを特徴とする付記1に記載のパターン形成方法。
前記レジストパターンのピッチは、前記ブロックコポリマー膜を構成するブロックコポリマーのピッチの2以上の整数倍である
ことを特徴とする付記1に記載のパターン形成方法。
前記スリミングされたレジストパターンのライン幅は、前記ブロックコポリマー膜を構成するブロックコポリマーのハーフピッチの整数倍である
ことを特徴とする付記1に記載のパターン形成方法。
前記レジストパターンのライン幅は、前記ブロックコポリマー膜を構成するブロックコポリマーのハーフピッチの2以上の整数倍である
ことを特徴とする付記1に記載のパターン形成方法。
前記レジストパターンのスペース幅は、前記ブロックコポリマー膜を構成するブロックコポリマーのハーフピッチの2以上の整数倍である
ことを特徴とする付記1に記載のパターン形成方法。
前記レジストパターンのライン幅は、前記ブロックコポリマー膜を構成するブロックコポリマーのハーフピッチの3以上の奇数倍である
ことを特徴とする付記1に記載のパターン形成方法。
前記レジストパターンのライン幅は、前記ブロックコポリマー膜を構成するブロックコポリマーのハーフピッチの2以上の偶数倍である
ことを特徴とする付記1に記載のパターン形成方法。
14…レジストパターン 14a…スリミングされたレジストパターン
15…凹部 16…凸部 17…中性化膜
20…ブロックコポリマー膜 21…PMMA部分
22…PS部分 23…ミクロ相分離パターン
Claims (6)
- 下地膜上にレジストパターンを形成する工程と、
前記レジストパターンをマスクとして用いて前記下地膜をエッチングして前記下地膜に凹部を形成する工程と、
前記下地膜に凹部を形成した後に前記レジストパターンをスリミングする工程と、
前記下地膜の前記スリミングされたレジストパターンで覆われていない領域上に第1のポリマー及び第2のポリマーに対して親和性を有する中性化膜を形成する工程と、
前記スリミングされたレジストパターン上及び前記中性化膜上に、前記第1のポリマー及び前記第2のポリマーを含むブロックコポリマー膜を形成する工程と、
前記ブロックコポリマー膜に対してミクロ相分離を行い、前記第1のポリマーで形成された第1の部分と前記第2のポリマーで形成された第2の部分とが配置されたミクロ相分離パターンを形成する工程と、
前記第1の部分及び前記第2の部分の一方を除去する工程と、
を備えることを特徴とするパターン形成方法。 - 前記第1の部分と前記第2の部分とは交互に配置されている
ことを特徴とする請求項1に記載のパターン形成方法。 - 前記スリミングされたレジストパターンの表面は、前記第2のポリマーよりも前記第1のポリマーに対して高い親和性を有する
ことを特徴とする請求項1に記載のパターン形成方法。 - 前記スリミングされたレジストパターンの表面に対して、前記第1のポリマーに対する親和性を高める処理を行う工程を、さらに備える
ことを特徴とする請求項1に記載のパターン形成方法。 - 前記レジストパターンのピッチは、前記ブロックコポリマー膜を構成するブロックコポリマーのピッチの2以上の整数倍である
ことを特徴とする請求項1に記載のパターン形成方法。 - 前記スリミングされたレジストパターンのライン幅は、前記ブロックコポリマー膜を構成するブロックコポリマーのハーフピッチの整数倍である
ことを特徴とする請求項1に記載のパターン形成方法。
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