JP5563803B2 - 回折構造体、広帯域、偏光、エリプソメトリおよび下地構造の測定 - Google Patents
回折構造体、広帯域、偏光、エリプソメトリおよび下地構造の測定 Download PDFInfo
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- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- G01N2021/95615—Inspecting patterns on the surface of objects using a comparative method with stored comparision signal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- Investigating Or Analysing Materials By Optical Means (AREA)
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Description
ここで、λは、入射光の波長であり、dは、回折構造体の周期である。
Claims (19)
- サンプルの回折構造体の複数のパラメータを測定する散乱計であって、
複数の署名曲線を含む参照データベースであって、前記署名曲線のそれぞれが前記複数のパラメータのそれぞれの異なる値のセットに対応し、前記値が周期的な回折構造体の線幅、高さ、および側壁角の値を少なくとも含む、参照データベースと、
広帯域放射線を出す放射線源と、
広帯域放射線を偏光して構造体をサンプリングするサンプリング光線を生成する偏光器と、
一定の範囲の波長にわたる前記広帯域放射線の構造体から回折の強度を検出する手段と、
前記検出した強度を前記参照データベース内の前記複数の署名曲線と比較して前記周期的な回折構造体の線幅、高さ、および側壁角を判定するプロセッサであって、前記プロセッサが前記周期的な回折構造体の少なくとも線幅、高さ、および側壁角を判定する、プロセッサと、
を備える散乱計。 - 請求項1記載の散乱計において、
前記偏光器が、前記サンプリング光線を回折構造体に対して傾斜角をなして方向付ける散乱計。 - 請求項1記載の散乱計において、
前記検出する手段が、前記回折構造体から前記光線のゼロ次回折を検出する散乱計。 - 請求項1記載の散乱計において、
前記回折構造体によって回折されたサンプリング光線の放射を受光して出力光線を生成する検光器をさらに含み、前記検出する手段が出力光線を検出する散乱計。 - 請求項4記載の散乱計において、
前記偏光器および検光器は、回折の強度が前記構造体から検出される場合にはそれぞれが実質的に同じ偏光の放射線を供給して出すように方向付けられる散乱計。 - 請求項1記載の散乱計において、
前記偏光器が、TEモードでサンプリング光線を生成する散乱計。 - 請求項1記載の散乱計において、
偏光放射線を回折構造体に供給して、前記偏光器および検出する手段に対するサンプル上の回折構造体の高さをステージによって調整する集束手段をさらに備える散乱計。 - 請求項7記載の散乱計において、
前記集束手段によって供給された偏光放射線が、サンプリング光線と実質的に同じ偏光を有する散乱計。 - サンプルの回折構造体の複数のパラメータを測定する方法であって、
複数の署名曲線を含む参照データベースを求めるステップであって、前記署名曲線のそれぞれが前記複数のパラメータのそれぞれの異なる値のセットに対応し、前記値が周期的な回折構造体の線幅、高さ、および側壁角の値を少なくとも含む、求めるステップと、
広帯域放射線を出す工程と、
サンプリング光線を生成するために、広帯域放射線を偏光する工程と、
サンプリング光線を構造体に方向付ける工程と、
一定の範囲の波長にわたる構造体から回折したサンプリング光線の放射線の強度を検出する工程と、
前記周期的な回折構造体の線幅、高さ、および側壁角を判定するために、前記検出した放射線の強度を前記参照データベース内の前記複数の署名曲線と比較する工程と、
を含む方法。 - 請求項9記載の方法において、
前記サンプルが隣接構造を有し、前記回折構造体が前記サンプルの隣接構造上に載置され、前記方法が、
前記隣接構造の光学指数および膜厚を求める工程と、
前記隣接構造の光学指数および膜厚を用いて前記回折構造体に対する前記一つ以上のパラメータの参照データベースを構築する工程と、
をさらに含む方法。 - 請求項10記載の方法において、
前記構築する工程が波長のスペクトルに対して前記複数のパラメータの参照データベースを構築し、前記方向付ける工程が前記スペクトルを含む波長を有する放射線の光線を方向付け、前記検出する工程が前記波長のスペクトルに対して複数の波長における強度データを検出する方法。 - 請求項11記載の方法において、
前記比較する工程が前記スペクトルの選択した部分の波長における強度データをデータベースの一部のみと比較し、前記スペクトルが紫外線波長を含み、前記部分が紫外線領域の波長からなる方法。 - 請求項9記載の方法において、
前記サンプリング光線を回折構造体に対して傾斜角をなして方向付ける工程をさらに含む方法。 - 請求項9記載の方法において、
前記検出する工程が、前記回折構造体から前記光線のゼロ次回折を検出する方法。 - 請求項9記載の方法において、
前記偏光する工程が、TEモードのサンプリング光線を生成する方法。 - サンプルの回折構造体の複数のパラメータを測定する散乱計であって、
複数のエリプソメトリックな関数を含む参照データベースであって、前記エリプソメトリックな関数のそれぞれが前記複数のパラメータのそれぞれの異なる値のセットに対応し、前記値が周期的な回折構造体の線幅、高さ、および側壁角の値を少なくとも含む、参照データベースと、
広帯域放射線を発する放射源と、
広帯域放射線を偏光して構造体をサンプリングするサンプリング光線を生成する偏光器と、
構造体によって回折または反射されたサンプリング光線から放射線を受け取って出力光線を出す検光器と、
複数の波長で実質的に同時に前記出力光線を検出する手段と、
エリプソメトリックな関数を測定するように前記偏光器および検光器を制御し、前記測定したエリプソメトリックな関数を前記参照データベース内の前記エリプソメトリックな関数と比較することによって前記複数のパラメータを判定する手段と、
を備える散乱計。 - 請求項16記載の散乱計において、
前記複数の波長が、紫外線波長を含む散乱計。 - 請求項16記載の散乱計において、
偏光放射線を回折構造体に供給して、偏光器および前記検出する手段に対するサンプル上の回折構造体の高さをステージによって調整する集束手段をさらに備える散乱計。 - 請求項18記載の散乱計において、
前記集束手段によって供給された偏光放射線が、実質的にサンプリング光線と同じ偏光を有する散乱計。
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US09/036,557 | 1998-03-06 | ||
US09/036,557 US6483580B1 (en) | 1998-03-06 | 1998-03-06 | Spectroscopic scatterometer system |
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JP2000534831A Division JP4633254B2 (ja) | 1998-03-06 | 1999-02-25 | 回折構造体、広帯域、偏光、エリプソメトリおよび下地構造の測定 |
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JP2000534831A Expired - Lifetime JP4633254B2 (ja) | 1998-03-06 | 1999-02-25 | 回折構造体、広帯域、偏光、エリプソメトリおよび下地構造の測定 |
JP2009244176A Expired - Lifetime JP5249169B2 (ja) | 1998-03-06 | 2009-10-23 | 回折構造体、広帯域、偏光、エリプソメトリおよび下地構造の測定 |
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JP2009244175A Expired - Lifetime JP5563803B2 (ja) | 1998-03-06 | 2009-10-23 | 回折構造体、広帯域、偏光、エリプソメトリおよび下地構造の測定 |
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EP (2) | EP1508772B1 (ja) |
JP (6) | JP4633254B2 (ja) |
AU (1) | AU3310999A (ja) |
DE (1) | DE69922942T2 (ja) |
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JP2010066268A (ja) | 2010-03-25 |
DE69922942T2 (de) | 2006-03-30 |
WO1999045340A1 (en) | 1999-09-10 |
DE69922942D1 (de) | 2005-02-03 |
JP2010133941A (ja) | 2010-06-17 |
US20030058443A1 (en) | 2003-03-27 |
EP1073876B1 (en) | 2004-12-29 |
JP2013083659A (ja) | 2013-05-09 |
US6590656B2 (en) | 2003-07-08 |
US7859659B2 (en) | 2010-12-28 |
EP1073876A1 (en) | 2001-02-07 |
JP2010133942A (ja) | 2010-06-17 |
JP4633254B2 (ja) | 2011-02-16 |
JP5102329B2 (ja) | 2012-12-19 |
US7173699B2 (en) | 2007-02-06 |
EP1508772A1 (en) | 2005-02-23 |
US20020033945A1 (en) | 2002-03-21 |
US6483580B1 (en) | 2002-11-19 |
JP4643737B2 (ja) | 2011-03-02 |
EP1508772B1 (en) | 2013-08-21 |
JP5249169B2 (ja) | 2013-07-31 |
US20110125458A1 (en) | 2011-05-26 |
US20100165340A1 (en) | 2010-07-01 |
US20070091327A1 (en) | 2007-04-26 |
JP2002506198A (ja) | 2002-02-26 |
US7898661B2 (en) | 2011-03-01 |
JP2010281822A (ja) | 2010-12-16 |
AU3310999A (en) | 1999-09-20 |
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