JP2017537352A - 計測方法、コンピュータ製品およびシステム - Google Patents
計測方法、コンピュータ製品およびシステム Download PDFInfo
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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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
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- G03F7/70—Microphotolithographic exposure; Apparatus therefor
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- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70491—Information management, e.g. software; Active and passive control, e.g. details of controlling exposure processes or exposure tool monitoring processes
- G03F7/705—Modelling or simulating from physical phenomena up to complete wafer processes or whole workflow in wafer productions
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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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70491—Information management, e.g. software; Active and passive control, e.g. details of controlling exposure processes or exposure tool monitoring processes
- G03F7/70508—Data handling in all parts of the microlithographic apparatus, e.g. handling pattern data for addressable masks or data transfer to or from different components within the exposure apparatus
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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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70605—Workpiece metrology
- G03F7/70616—Monitoring the printed patterns
- G03F7/70633—Overlay, i.e. relative alignment between patterns printed by separate exposures in different layers, or in the same layer in multiple exposures or stitching
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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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70605—Workpiece metrology
- G03F7/706835—Metrology information management or control
- G03F7/706837—Data analysis, e.g. filtering, weighting, flyer removal, fingerprints or root cause analysis
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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
- G03F9/00—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
- G03F9/70—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically for microlithography
- G03F9/7003—Alignment type or strategy, e.g. leveling, global alignment
- G03F9/7046—Strategy, e.g. mark, sensor or wavelength selection
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Abstract
Description
本出願は、2014年11月26日に出願された欧州出願14195009.7号の利益を主張し、その全体が参照により本書に援用される。
本発明は、例えばリソグラフィ技術によるデバイス製造に利用可能なメトロロジーのための方法、装置およびコンピュータ製品に関し、リソグラフィ技術を用いるデバイス製造方法に関する。
Claims (33)
- ターゲットの測定値から前記ターゲットの構造的非対称性の形式を決定することと、
前記非対称性の形式に関連する非対称性パラメータの値を決定するために前記ターゲットの光学測定のシミュレーションを実行することと、を備えることを特徴とする方法。 - 前記非対称性パラメータは、前記ターゲットを用いる測定結果の前記非対称性に起因する位置オフセットを含むことを特徴とする請求項1に記載の方法。
- 前記非対称性パラメータは、前記ターゲットを用いる測定結果の前記非対称性に起因する位置オフセットを、前記ターゲットを用いる測定結果の前記非対称性に起因するプロセス依存の倍率オフセットに関連付ける倍率を含むことを特徴とする請求項1または2に記載の方法。
- 前記ターゲットの構造的非対称性の形式を決定することは、前記光学測定のパラメータの関数として、ターゲットの測定から決定されるオーバレイの値、または、前記ターゲットの測定から決定される非対称性に起因するプロセス依存の倍率オフセットの値を評価することを備えることを特徴とする請求項1から3のいずれか一項に記載の方法。
- 前記光学測定のパラメータは、当該光学測定の測定ビームの波長および/または偏光を含むことを特徴とする請求項4に記載の方法。
- 前記決定される値を評価することは、(i)前記決定される値または前記決定される値を表す構成物と、(ii)前記光学測定のパラメータの関数としての一以上のフィンガープリントのオーバレイもしくはプロセス依存の倍率オフセットの値のセットまたは前記フィンガープリントの値のセットを表す一以上のフィンガープリント構成物と、の間の適合性を決定することを含み、フィンガープリントのセットまたはフィンガープリントの構成物のそれぞれが異なる形式の非対称性を表すことを特徴とする請求項4または5に記載の方法。
- 前記ターゲットに関連するターゲット形成パラメータの変化に対する前記非対称性パラメータの感度を分析することをさらに備える特徴とする請求項1から6のいずれか一項に記載の方法。
- 前記感度を分析することは、前記ターゲット形成パラメータの変化に対する前記非対称性パラメータの感度が最小値となる前記光学測定のパラメータの値を決定することを含むことを特徴とする請求項7に記載の方法。
- 前記光学測定のパラメータは、前記光学測定の測定ビームの波長および/または偏光を含むことを特徴とする請求項8に記載の方法。
- 前記分析することは、シミュレーションを実行することを含むことを特徴とする請求項7から9のいずれか一項に記載の方法。
- 前記ターゲットは、上位層(overlying)周期構造を含むことを特徴とする請求項1から10のいずれか一項に記載の方法。
- 前記シミュレーションを実行することは、特定された非対称性に対する横シフトがゼロの位置で、上位層周期構造の光学測定をシミュレーションすることを含むことを特徴とする請求項11に記載の方法。
- 前記シミュレーションから、前記ターゲットを用いる測定結果の前記非対称性に起因するプロセス依存の倍率オフセットの値および前記ターゲットを用いる測定結果の前記非対称性に起因する位置オフセットの値を決定することをさらに備えることを特徴とする請求項1から12のいずれか一項に記載の方法。
- 前記非対称性パラメータに基づいて、前記ターゲットの測定から決定された前記ターゲットのオーバレイまたはアライメントの値を補正することをさらに備えることを特徴とする請求項1から13のいずれか一項に記載の方法。
- ターゲットの測定値から決定された前記ターゲットの構造的非対称性の形式に関連する非対称性パラメータの値を決定するために前記ターゲットの光学測定のシミュレーションを実行することと、
前記ターゲットに関連するターゲット形成パラメータの変化に対する前記非対称性パラメータの感度を分析することと、を備えることを特徴とする方法。 - 前記非対称性パラメータは、前記ターゲットを用いる測定結果の前記非対称性に起因する位置オフセットを、前記ターゲットを用いる測定結果の前記非対称性に起因するプロセス依存の倍率オフセットに関連付ける倍率を含むことを特徴とする請求項15に記載の方法。
- 前記ターゲット形成パラメータの変化に対する前記非対称性パラメータの感度が最小値となる前記光学測定のパラメータの値を決定することをさらに備えることを特徴とする請求項15または16に記載の方法。
- 前記光学測定のパラメータは、前記光学測定の測定ビームの波長および/または偏光を含むことを特徴とする請求項17に記載の方法。
- 前記分析することは、シミュレーションを実行することを含むことを特徴とする請求項15から18のいずれか一項に記載の方法。
- 前記ターゲットは、上位層周期構造を含むことを特徴する請求項15から19のいずれか一項に記載の方法。
- 前記シミュレーションを実行することは、特定された非対称性に対する横シフトがゼロの位置で、上位層周期構造の前記光学測定をシミュレーションすることを含むことを特徴とする請求項20に記載の方法。
- 前記ターゲットを用いる測定結果および前記ターゲットを用いる測定結果の前記非対称性に起因する位置オフセットの値の決定に用いられる、前記非対称性に起因するプロセス依存の倍率オフセットの値を前記シミュレーションから決定することをさらに備えることを特徴とする請求項15から21のいずれか一項に記載の方法。
- 前記光学測定のパラメータの関数として、前記ターゲットの測定結果から決定されるオーバレイの値または前記ターゲットの測定結果から決定される前記非対称性に起因するプロセス依存の倍率オフセットの値を評価することにより、前記ターゲットの構造的非対称性の形式を決定することをさらに備えることを特徴とする請求項15から22のいずれか一項に記載の方法。
- 前記非対称性パラメータに基づいて、前記ターゲットの測定から決定されるオーバレイまたはアライメントの値を補正することをさらに備えることを特徴とする請求項15から23のいずれか一項に記載の方法。
- ターゲットにより回折される放射の測定パラメータを用いて前記ターゲットの構造的非対称性パラメータを決定することと、
前記ターゲットに関連するターゲット形成パラメータの変化に対して最小の感度となる前記構造的非対称性パラメータに基づいて前記ターゲットの測定ビームの特性を決定することと、を備えることを特徴とする方法。 - 前記測定ビームの特性を用いて前記ターゲットを測定することと、前記構造的非対称性パラメータに基づいて、前記測定ビームの特性を用いる前記ターゲットの測定から決定される前記ターゲットのオーバレイまたはアライメントの値を補正することと、をさらに備えることを特徴とする請求項25に記載の方法。
- 前記構造的非対称性パラメータは、前記ターゲットを用いる測定結果の前記非対称性に起因する位置オフセット、または、前記ターゲットを用いる測定結果の前記非対称性に起因する位置オフセットを前記ターゲットを用いる測定結果の前記非対称性に起因するプロセス依存の倍率オフセットに関連付ける倍率を含むことを特徴とする請求項25または26に記載の方法。
- 前記測定ビームの特性は、前記測定ビームの波長および/または偏光を含むことを特徴とする請求項25から27のいずれか一項に記載の方法。
- リソグラフィ工程を用いて一連の基板にデバイスパターンが付与されるデバイス製造方法であって、当該方法は、請求項1から28のいずれか一項に記載の方法を用いて少なくとも一つの回折測定ターゲットを評価することと、当該方法の結果にしたがって一以上の基板に対する前記リソグラフィ工程を制御することとを含むことを特徴とする方法。
- 前記少なくとも一つの回折測定ターゲットは、前記少なくとも一つの基板上の前記デバイスパターンの一部として形成され、または、前記デバイスパターンの側方に形成され、当該方法の結果にしたがって後続基板に対する前記リソグラフィ工程が制御されることを特徴とする請求項29に記載の方法。
- 請求項1から30のいずれか一項に記載の方法をプロセッサに実行させるための機械に読み取り可能な指令を備えることを特徴とする非一時的なコンピュータプログラム製品。
- 基板上の回折測定ターゲットにビームを提供し、リソグラフィ工程のパラメータを決定するために前記ターゲットにより回折された放射を検出するよう構成される検査装置と、
請求項31に記載の非一時的なコンピュータプログラム製品と、を備えることを特徴とするシステム。 - 放射ビームを変調させるパターニングデバイスを保持するサポート構造と、前記変調されたものを放射感受性基板上に投影するよう構成される投射光学システムとを含むリソグラフィ装置をさらに備えることを特徴とする請求項32に記載のシステム。
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| EP14195009 | 2014-11-26 | ||
| EP14195009.7 | 2014-11-26 | ||
| PCT/EP2015/075308 WO2016083076A1 (en) | 2014-11-26 | 2015-10-30 | Metrology method, computer product and system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2019536096A (ja) * | 2016-11-10 | 2019-12-12 | エーエスエムエル ネザーランズ ビー.ブイ. | スタック差を使用した設計及び補正 |
| JP2020507800A (ja) * | 2017-02-02 | 2020-03-12 | エーエスエムエル ネザーランズ ビー.ブイ. | メトロロジ方法、装置、及びコンピュータプログラム |
| CN112567296A (zh) * | 2018-08-28 | 2021-03-26 | 科磊股份有限公司 | 使用二衍射级成像的离轴照明覆盖测量 |
| JP2021512348A (ja) * | 2018-01-30 | 2021-05-13 | エーエスエムエル ネザーランズ ビー.ブイ. | 基板グリッドを決定するための測定装置及び方法 |
| JP2021513098A (ja) * | 2018-02-02 | 2021-05-20 | エーエスエムエル ネザーランズ ビー.ブイ. | メトロロジプロセスを最適化する方法 |
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| US12321101B2 (en) | 2019-07-03 | 2025-06-03 | Asml Netherlands B.V. | Method for applying a deposition model in a semiconductor manufacturing process |
| JP2024109689A (ja) * | 2020-05-19 | 2024-08-14 | エーエスエムエル ホールディング エヌ.ブイ. | アライメントマークの局所的な歪みに基づくアライメント信号の生成 |
| JP7654141B2 (ja) | 2020-05-19 | 2025-03-31 | エーエスエムエル ホールディング エヌ.ブイ. | アライメントマークの局所的な歪みに基づくアライメント信号の生成 |
| US12474647B2 (en) | 2020-05-19 | 2025-11-18 | Asml Netherlands B.V. | Generating an alignment signal based on local alignment mark distortions |
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