JP7170860B2 - 角度付き構造を形成するための技術 - Google Patents
角度付き構造を形成するための技術 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 43
- 239000000758 substrate Substances 0.000 claims description 136
- 238000005530 etching Methods 0.000 claims description 62
- 150000002500 ions Chemical class 0.000 claims description 58
- 239000000463 material Substances 0.000 claims description 24
- 238000010884 ion-beam technique Methods 0.000 claims description 21
- 238000000059 patterning Methods 0.000 claims description 20
- 230000003287 optical effect Effects 0.000 claims description 13
- 238000000151 deposition Methods 0.000 claims description 8
- 238000001020 plasma etching Methods 0.000 claims description 7
- 150000004767 nitrides Chemical class 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical class O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 100
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000000873 masking effect Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000013459 approach Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical group [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000000992 sputter etching Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003278 mimic effect Effects 0.000 description 1
- -1 oxides Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
- H01L21/76807—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics for dual damascene structures
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- H01L21/76816—Aspects relating to the layout of the pattern or to the size of vias or trenches
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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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- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70605—Workpiece metrology
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Description
Claims (16)
- 基板に角度付き構造を形成する方法であって、
前記基板の主表面に対する垂直線に対して非ゼロの傾斜角に配向された側壁を有する角度付きマスクフィーチャを、前記基板の基板ベース上に配置された、酸化物または窒化物を含む第1のハードマスク材料を有する第1のマスク層をエッチングすることによって、第1のマスクを形成することと、
前記第1のマスクが適所にある状態で、前記基板をエッチングすることであって、前記エッチングすることが、前記主表面に対する垂直線に対して非ゼロの入射角で配置された軌道を有するイオンを向けることを含む、前記第1のマスクが適所にある状態で、前記基板をエッチングすることと、
前記基板をエッチングした後に前記第1のマスクを除去することと、を含み、
前記第1のマスクを形成することは、
前記角度付きマスクフィーチャをエッチングする前に、前記第1のハードマスク材料と異なる第2のハードマスク材料を有する第2のマスク層を前記第1のマスク層上に堆積させることと、
パターニングフィーチャアレイを前記第2のマスク層に形成するために、前記主表面に対する垂直線に沿って配向された側壁を有するように、パターニング層が適所にある状態で第2のマスク層をエッチングすることと、
前記パターニング層を除去することと、
角度付きエッチングイオンを前記第2のマスク層の開口部に向けることであって、前記角度付きマスクフィーチャが前記第1のマスク層に形成され、前記基板よりも幅の広い形状を有するイオンビームを用いて、角度付きエッチングイオンを前記第2のマスク層の開口部に向けること、を含み、
前記基板をエッチングする前に前記第2のマスク層は除去される、方法。 - 前記第1のマスク層内の前記角度付きマスクフィーチャが、前記角度付きマスクフィーチャの隣接するフィーチャ間に第1の間隔を規定し、前記角度付き構造が、前記角度付き構造の隣接する構造間にトレンチの幅を規定し、前記幅が、前記第1の間隔に等しい、請求項1に記載の方法。
- 非ゼロの前記入射角が、非ゼロの前記傾斜角と平行であり、前記角度付き構造が、前記第1のマスク層の前記角度付きマスクフィーチャの一組の側壁に平行な角度付き側壁を備える、請求項1に記載の方法。
- 前記基板をエッチングすることが、反応性イオンエッチングにおいて反応性角度付きイオンを前記基板に向けることを含み、前記基板が、前記第1のマスク層に対して選択的にエッチングされる、請求項1に記載の方法。
- 前記基板をエッチングすることが、非反応性エッチング環境において、角度付きイオンを向けて、前記基板をスパッタエッチングすることを含む、請求項1に記載の方法。
- 前記角度付きマスクフィーチャが、前記基板の前記主表面内の第1の方向に沿って延びるように細長くなっており、前記基板をエッチングすることが、角度付きイオンビームを使用して前記第1のマスク層を通って前記基板を指向性エッチングすることを含み、前記角度付きイオンビームが、リボンビームを含み、前記リボンビームが、前記第1の方向と平行に延びる長軸を有する、請求項1に記載の方法。
- 前記角度付き構造が、光学格子を形成する、請求項1に記載の方法。
- 前記非ゼロ入射角は、前記基板の主表面に対して5度と75度の間の値を有する、請求項1に記載の方法。
- 光学格子を形成する方法であって、
格子層を含む基板を用意することと、
酸化物または窒化物を含む第1のハードマスク材料を有する第1のマスク層を前記基板上に堆積させることと、
前記基板の主表面に対する垂直線に対して非ゼロの傾斜角に配向された側壁を有する角度付きマスクフィーチャを、前記第1のマスク層にエッチングすることによって、第1のマスクを形成することと、
前記第1のマスクが適所にある状態で、前記格子層をエッチングすることと、
を含み、前記エッチングすることが、前記主表面に対する垂直線に対して非ゼロの入射角で配置され、かつ非ゼロの前記傾斜角と平行に配置された軌道を有するイオンを向けることと、
前記基板をエッチングした後に前記第1のマスクを除去することと、を含み、
前記第1のマスクを形成することは、
前記角度付きマスクフィーチャをエッチングする前に、前記第1のハードマスク材料と異なる第2のハードマスク材料を有する第2のマスク層を前記第1のマスク層上に堆積させることと、
パターニングフィーチャアレイを前記第2のマスク層に形成するために、前記主表面に対する垂直線に沿って配向された側壁を有するように、パターニング層が適所にある状態で第2のマスク層をエッチングすることと、
前記パターニング層を除去することと、
角度付きエッチングイオンを前記第2のマスク層の開口部に向けることであって、前記角度付きマスクフィーチャが前記第1のマスク層に形成され、前記基板よりも幅の広い形状を有するイオンビームを用いて、角度付きエッチングイオンを前記第2のマスク層の開口部に向けること、を含み、
前記基板をエッチングする前に前記第2のマスク層は除去される、方法。 - 前記格子層をエッチングすることが、角度付き側壁を有する複数の角度付き構造を生成し、前記角度付き側壁が、前記第1のマスク層の前記角度付きマスクフィーチャの一組の側壁に平行である、請求項9に記載の方法。
- 前記基板をエッチングすることが、反応性イオンエッチングにおいて反応性角度付きイオンを前記基板に向けることを含み、前記基板が、前記第1のマスク層に対して選択的にエッチングされる、請求項9に記載の方法。
- 前記基板をエッチングすることが、非反応性エッチング環境において、角度付きイオンを向けて、前記基板をスパッタエッチングすることを含む、請求項9に記載の方法。
- 基板に角度付き構造を形成する方法であって、
基板を用意することと、
窒化ケイ素、窒化チタンまたは酸化物を含む第1のハードマスク材料を有する第1のマスク層を前記基板上に堆積させることと、
前記第1のハードマスク材料と異なる第2のハードマスク材料を有する第2のマスク層を前記第1のマスク層の外面に堆積させることと、
前記基板の主表面に対する垂直線に沿って配向された側壁を有するように、前記第2のマスク層にパターニングフィーチャアレイを形成するために、パターニング層が適所にある状態で、前記第2のマスク層をエッチングすることと、
前記パターニング層を除去することと、
前記第2のマスク層が適所にある状態で、前記第1のマスク層に角度付きマスクフィーチャをエッチングすることと、
前記第1のマスク層の外面から前記第2のマスク層を除去することと、
前記第2のマスク層を除去した後、前記第1のマスクを適所にある状態で前記基板をエッチングすることであって、エッチングすることが、前記基板よりも幅の広い形状を有するイオンビームを用いて、前記基板の主表面に対する垂直線に対して非ゼロの入射角で配置された軌道を有するイオンを向けることを含む、前記第1のマスクを適所にある状態で前記基板をエッチングすること、を含む、方法。 - 前記基板をエッチングすることは、角度付き側壁を生成し、前記角度付き側壁は前記第1のマスク層の前記角度付きマスクフィーチャの一組の側壁に平行である、請求項13に記載の方法。
- 前記基板をエッチングすることが、反応性イオンエッチングにおいて反応性角度付きイオンを前記基板に向けることを含み、前記基板が、前記第1のマスク層に対して選択的にエッチングされる、請求項13に記載の方法。
- 前記角度付きマスクフィーチャは、前記基板の主表面内で第1の方向に沿って延びるように細長く、前記基板をエッチングすることが、角度付きイオンビームを使用して前記第1のマスク層を通って 前記基板を指向性エッチングすることを含み、前記角度付きイオンビームが、リボンビームを含み、前記リボンビームが、前記第1の方向と平行に延びる長軸を有する、請求項13に記載の方法。
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