JP2012198217A - ウエハの特性決定のための方法とシステム - Google Patents
ウエハの特性決定のための方法とシステム Download PDFInfo
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Abstract
【解決手段】検査システム16を用い、ウエハからの光に対応する出力を生成することを含む。出力は、ウエハ上の欠陥に対応する第一出力と、欠陥に対応しない第二出力とを含む。また本方法は、第二出力を用い、ウエハの特性を決定することを含む。一つのシステム16は、ウエハに光を当て、ウエハからの光に対応する出力を生成するように設定された検査サブシステムを備える。出力は、欠陥に対応する第一出力と、欠陥に対応しない第二出力を含む。また本システムは、第二出力を用い、ウエハの特性を決定するように設定されたプロセッサを備える。
【選択図】図2
Description
本出願は、2006年2月9日に出願された米国仮出願60/772,418号「ウエハの特性決定のための方法とシステム」への優先権を請求するものであり、該仮出願はここに詳述された参照文献として取り扱われる。
Claims (22)
- ウエハの特性を決定するための方法であって、当該方法は、
出力が、ウエハ上の欠陥に対応する第一出力と、欠陥に対応しない第二出力を含む条件下で、検査システムを用い、ウエハからの光に対応する出力を生成することと、
前記第一出力ではなく前記第二出力を用いて、ウエハの特性の値を決定すること、
を含み、
前記第一出力と前記第二出力は同一の検知器により生成され、
前記決定することが、第二出力と前記特性の間の予め定められた相関を用い、前記特性の値を決定することを含み、前記特性は、計測学ツールを用いて測定可能なウエハの非欠陥関連特性であり、前記特性はウェハの物理的量である
ことを特徴とするウエハの特性を決定するための方法。 - ウエハからの光が拡散散乱光を含むことを特徴とする請求項1に記載の方法。
- 生成することが、レーザーにより生成された光によりウエハを照らすことを特徴とする請求項1に記載の方法。
- 生成することが、ウエハに亘り光を走査し、ウエハに亘り出力を生成することを特徴とする請求項1に記載の方法。
- 生成することが、ウエハの実質的全表面に亘り出力を生成することを特徴とする請求項1に記載の方法。
- 生成することが、ウエハの実質的全表面に亘り出力を生成することを特徴とし、そして、決定することが、ウエハの実質的全表面に亘り生成された第二出力を用い、前記特性の値を決定することを特徴とする請求項1に記載の方法。
- 決定することが、ウエハ上の領域に亘り第二出力の値を決定し、該値からの前記特性の値を決定することを特徴とする請求項1に記載の方法。
- 前記特性が、ウエハ上の領域に亘る特性の平均値であることを特徴とする請求項1に記載の方法。
- 決定することが、ウエハに亘る第二出力の変動を決定し、該変動から前記特性の値を決定することを特徴とする請求項1に記載の方法。
- 決定することが、ウエハの実質的全表面に亘り第二出力の二次元マップを生成し、該二次元マップよりウエハの前記特性の値を決定することを特徴とする請求項1に記載の方法。
- 決定することが、ウエハ上の異なる領域に亘る第二出力に関する値を決定し、そして該値を用い、異なる領域に関する前記特性の値を決定することを特徴とする請求項1に記載の方法。
- 決定することが、ウエハ上の異なる領域に関する特性の単一の値を決定し、そして異なる領域のそれぞれは、ウエハ上のパターン化された特徴の領域よりも大きいことを特徴とする請求項1に記載の方法。
- 生成することが、検査システムのマルチ・チャネルを用いて出力を生成することを特徴とし、決定することが、マルチ・チャネルの内の一つのチャネルにより生成された第二出力を用いて、特性を決定することを特徴とし、そして更に方法が、マルチ・チャネルの内の別の一つのチャネルより第二出力を用いて、ウエハの異なる特性を決定することを特徴とする請求項1に記載の方法。
- 更に、特性を用いて、統計的工程管理を実施することを特徴とする請求項1に記載の方法。
- 更に、半導体製造工程内のエクスカーションを検知するための特性を用い、半導体製造工程のインライン監視を実施することを特徴とする請求項1に記載の方法。
- 更に、ウエハ上の異なる領域に関する第二出力の標準偏差を決定し、該標準偏差が、ウエハ形成に用いられたプロセス内のエクスカーションを示すかを決定することを特徴とする請求項1に記載の方法。
- 更に、ウエハに亘り第二出力の変動を決定することと、ウエハの形成に使用されたプロセス・ツールの特徴に該変動が関連しているかを決定することを特徴とする請求項1に記載の方法。
- 更に、ウエハの実質的全表面に亘り第二出力の二次元マップを生成すること、二次元マップ内に異常なパターンが存在するかを決定すること、そして、異常なパターンが存在する場合、該異常パターンが、ウエハの形成に用いられたプロセス内のエクスカーションに対応するかを決定することを特徴とする請求項1に記載の方法。
- ウエハが、パターン化されてない、又はパターン化されたウエハを含むことを特徴とする請求項1に記載の方法。
- 更に、出力を用いウエハ上の欠陥を検知することを特徴とする請求項1に記載の方法。
- ウエハの特性を決定するためのコンピュータ実施方法であって、当該方法は、
出力が、ウエハ上の欠陥に対応する第一出力と、欠陥に対応しない第二出力を含む条件下で、検査システムにより生成されたウエハからの光に対応する出力を取得することと、
前記第一出力ではなく前記第二出力を用い、ウエハの特性の値を決定すること、
を含み、
前記第一出力と前記第二出力は同一の検知器により生成され、
前記決定することが、第二出力と前記特性の間の予め定められた相関を用い、前記特性の値を決定することを含み、前記特性は、計測学ツールを用いて測定可能なウエハの非欠陥関連特性であり、前記特性はウェハの物理的量である
ことを特徴とするウエハの特性を決定するためのコンピュータ実施方法。 - ウエハの特性を決定するためのシステムであって、当該システムは、
出力が、ウエハ上の欠陥に対応する第一出力と、欠陥に対応しない第二出力を含む条件下で、ウエハに光を当て、ウエハからの光に対応する出力を生成するように設定された検査サブシステムと、
前記第一出力ではなく前記第二出力を用い、ウエハの特性を決定するように設定されたプロセッサと、
を備え、
前記第一出力と前記第二出力は前記検査サブシステムの同一の検知器により生成され、
前記特性の値は、第二出力と前記特性の間の予め定められた相関を用いて決定され、
前記特性は、計測学ツールを用いて測定可能なウエハの非欠陥関連特性であり、前記特性はウェハの物理的量である
ことを特徴とするウエハの特性を決定するためのシステム。
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|---|---|---|---|
| US77241806P | 2006-02-09 | 2006-02-09 | |
| US60/772,418 | 2006-02-09 |
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| JP2008554517A Division JP2009526240A (ja) | 2006-02-09 | 2007-02-09 | ウエハの特性決定のための方法とシステム |
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| JP2012198217A true JP2012198217A (ja) | 2012-10-18 |
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| JP2012094940A Active JP5718849B2 (ja) | 2006-02-09 | 2012-04-18 | ウエハの特性決定のための方法とシステム |
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| US (2) | US8284394B2 (ja) |
| EP (1) | EP1982160A4 (ja) |
| JP (3) | JP2009526240A (ja) |
| KR (1) | KR101324419B1 (ja) |
| SG (1) | SG170805A1 (ja) |
| WO (1) | WO2007092950A2 (ja) |
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|---|---|
| KR20080100363A (ko) | 2008-11-17 |
| US20080013083A1 (en) | 2008-01-17 |
| US8422010B2 (en) | 2013-04-16 |
| JP6182737B2 (ja) | 2017-08-23 |
| SG170805A1 (en) | 2011-05-30 |
| US8284394B2 (en) | 2012-10-09 |
| KR101324419B1 (ko) | 2013-11-01 |
| JP2009526240A (ja) | 2009-07-16 |
| WO2007092950A2 (en) | 2007-08-16 |
| US20130035877A1 (en) | 2013-02-07 |
| JP5718849B2 (ja) | 2015-05-13 |
| JP2015099148A (ja) | 2015-05-28 |
| EP1982160A4 (en) | 2016-02-17 |
| WO2007092950A3 (en) | 2008-04-17 |
| EP1982160A2 (en) | 2008-10-22 |
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