JP2021110952A - 極紫外線用反射型ブランクマスク及びフォトマスク - Google Patents
極紫外線用反射型ブランクマスク及びフォトマスク Download PDFInfo
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- G—PHYSICS
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- 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
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/22—Masks or mask blanks for imaging by radiation of 100nm or shorter wavelength, e.g. X-ray masks, extreme ultraviolet [EUV] masks; Preparation thereof
- G03F1/24—Reflection masks; Preparation thereof
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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
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/22—Masks or mask blanks for imaging by radiation of 100nm or shorter wavelength, e.g. X-ray masks, extreme ultraviolet [EUV] masks; Preparation thereof
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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
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/38—Masks having auxiliary features, e.g. special coatings or marks for alignment or testing; Preparation thereof
- G03F1/40—Electrostatic discharge [ESD] related features, e.g. antistatic coatings or a conductive metal layer around the periphery of the mask substrate
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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
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/52—Reflectors
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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
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/54—Absorbers, e.g. of opaque materials
- G03F1/58—Absorbers, e.g. of opaque materials having two or more different absorber layers, e.g. stacked multilayer absorbers
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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
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/60—Substrates
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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
- H01L21/0332—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 composition, e.g. multilayer masks, materials
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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
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- Condensed Matter Physics & Semiconductors (AREA)
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- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Preparing Plates And Mask In Photomechanical Process (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
Description
図2に示すように、レジスト膜108のパターンを用いて吸収膜106をエッチングすることによって作製された吸収膜パターン106a,106bは、その側面が傾斜して形成される。これは、吸収膜106がエッチングガスに露出される時間が、吸収膜106の上部に行くほど大きいためである。傾斜が大きいほど、吸収膜パターン106a,106bの下部層106aにおいて下部の厚さt1が上部の厚さt2よりも大きくなる。また、下部層106aの下部にはフーティング(footing)が形成される。このような現象によって、設計(design)されたCD(critical demension)との差が生じ、フォトマスクによって作製される回路パターンの精度が低下する。
以下では、本発明の具体的な具現例を述べる。
Claims (19)
- 基板、前記基板上に形成された反射膜、及び前記反射膜上に形成された吸収膜を含み、
前記吸収膜は、最上部層及び該最上部層下の複数の層で構成され、
前記複数の層は、Taを含み、且つ上方に行くほどNの含有量が増加するように構成されることを特徴とする、EUV用ブランクマスク。 - 前記複数の層は、前記反射膜上に形成された第1層、及び前記第1層上に形成された第2層を含むことを特徴とする、請求項1に記載のEUV用ブランクマスク。
- 前記第1層及び前記第2層はそれぞれ、1〜50nmの厚さを有することを特徴とする、請求項2に記載のEUV用ブランクマスク。
- 前記吸収膜は、Pt、Ni、Cr、Mo、V、Co、Ag、Sb、Bi、Co、Sn、Te、Zr、Si、Nb、Pd、Zn、Al、Mn、Cd、Se、Cu、Hf、Wのうち一つ以上の物質をさらに含むことを特徴とする、請求項1に記載のEUV用ブランクマスク。
- 前記吸収膜は、C、B、Hのうち一つ以上の物質をさらに含むことを特徴とする、請求項1に記載のEUV用ブランクマスク。
- 前記第1層は、前記第2層よりも厚いことを特徴とする、請求項2に記載のEUV用ブランクマスク。
- 前記第2層は1〜5nmの厚さを有し、前記第1層と前記第2層は、厚さの和が40nm以上であることを特徴とする、請求項6に記載のEUV用ブランクマスク。
- 前記第1層は、Ta:N=60at%:40at%〜100at%:0at%の比率を有し、前記第2層は、Ta:N=59at%:41at%〜90at%:10at%の比率を有することを特徴とする、請求項6に記載のEUV用ブランクマスク。
- 前記第2層は、前記第1層に比べてNの含有量が1〜20at%高くなるように構成されることを特徴とする、請求項8に記載のEUV用ブランクマスク。
- 前記第2層は、前記第1層よりも厚いことを特徴とする、請求項2に記載のEUV用ブランクマスク。
- 前記第1層は5nm以上の厚さを有し、前記第1層と前記第2層は、厚さの和が40nm以上であることを特徴とする、請求項10に記載のEUV用ブランクマスク。
- 前記第1層は、Ta:N=61at%:39at%〜100at%:0at%の比率を有し、前記第2層は、Ta:N=60at%:40at%〜99at%:1at%の比率を有することを特徴とする、請求項10に記載のEUV用ブランクマスク。
- 前記第2層は、前記第1層に比べてNの含有量が1〜20at%高くなるように構成されることを特徴とする、請求項12に記載のEUV用ブランクマスク。
- 前記最上部層は酸素(O)を含み、前記複数の層は酸素(O)を含まないことを特徴とする、請求項1に記載のEUV用ブランクマスク。
- 前記最上部層は、2〜5nmの厚さを有することを特徴とする、請求項14に記載のEUV用ブランクマスク。
- 前記最上部層は、前記複数の層に対して5以上のエッチング選択比を有することを特徴とする、請求項15に記載のEUV用ブランクマスク。
- 前記反射膜は、Mo層とSi層とが交互に配置された構造を有することを特徴とする、請求項1に記載のEUV用ブランクマスク。
- 前記基板の背面に形成された導電膜をさらに含むことを特徴とする、請求項1に記載のEUV用ブランクマスク。
- 請求項1のブランクマスクを用いて作製されたフォトマスク。
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KR1020200002429A KR102285099B1 (ko) | 2020-01-08 | 2020-01-08 | 극자외선용 반사형 블랭크 마스크 및 포토마스크 |
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CN114779396A (zh) * | 2022-04-27 | 2022-07-22 | 歌尔股份有限公司 | 光波导系统及增强现实设备 |
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US11815801B2 (en) | 2023-11-14 |
JP7351864B2 (ja) | 2023-09-27 |
KR102285099B1 (ko) | 2021-08-04 |
TWI811610B (zh) | 2023-08-11 |
TW202314372A (zh) | 2023-04-01 |
TWI846176B (zh) | 2024-06-21 |
US20210208495A1 (en) | 2021-07-08 |
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