JP2008541058A - ウエハー端部検査システム - Google Patents
ウエハー端部検査システム Download PDFInfo
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/306—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces for measuring evenness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- 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
- G01N21/9501—Semiconductor wafers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- 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
- G01N21/9501—Semiconductor wafers
- G01N21/9503—Wafer edge inspection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N2021/556—Measuring separately scattering and specular
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/21—Polarisation-affecting properties
- G01N21/211—Ellipsometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- 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
- G01N21/9506—Optical discs
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/061—Sources
- G01N2201/06113—Coherent sources; lasers
- G01N2201/0612—Laser diodes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
Description
Claims (30)
- 表面(122)上に放射光を指向させる放射光標的アセンブリと、
表面(122)からの反射光を収集する反射光収集アセンブリと、
反射光からの表面パラメタ・データを生成する信号プロセシング・モジュールと、
表面パラメタ・データを解析し、表面の欠陥を検知する欠陥検知モジュールと、
を備えたことを特徴とする表面分析計システム。 - 表面分析計と第一表面(122)の間で線形運動を伝達する第一駆動アセンブリと、
表面分析計と第一表面(122)に平行な軸の周りの第一表面の間で回転運動を伝達する第二駆動アセンブリと、
をさらに備えたことを特徴とする請求項1記載のシステム。 - 表面(122)に垂直な軸の周りに回転運動を伝達する第三駆動アセンブリをさらに備えたことを特徴とする請求項1記載のシステム。
- 反射光収集アセンブリが、反射光を収集する曲面収束鏡(436)を備えたことを特徴とする請求項1記載のシステム。
- パラボラ収束鏡、楕円収束鏡、球面収束鏡(536)の少なくとも一つをさらに備えたことを特徴とする請求項4記載のシステム。
- 反射光の単一または複数の反射率と、表面上の単一または複数の位置を相関づける反射率データ・セットを、信号プロセシング・モジュールが生成することを特徴とする請求項1記載のシステム。
- 入射光がS偏光、P偏光、またはQ偏光の少なくとも一つを含むことを特徴とする請求項6記載のシステム。
- 入射偏光が直線偏光、または楕円偏光の少なくとも一つを含むことを特徴とする請求項1記載のシステム。
- 欠陥検知モジュールが、
反射率データ・セットからの反射率のバックグランド・ノイズ・レベルを設定し、
バックグランド・ノイズ・レベルより単一または複数の閾値の幅を設定し、
単一または複数の閾値の範囲外にある反射率を有するデータ・セット内の単一または複数の点を欠陥として指定することを特徴とする請求項6記載のシステム。 - 信号プロセシング・モジュールが、
反射光の単一または複数の反射率と、表面上の単一または複数の位置を相関づける2次元ヒストグラムを生成することを特徴とする請求項6記載のシステム。 - 欠陥検知モジュールが、2次元ヒストグラムを分析し、表面上の単一または複数の欠陥を位置づけることを特徴とする請求項10記載のシステム。
- ユーザー・インターフェイスにより、ユーザーへ欠陥を表示する表示モジュールを備えたことを特徴とする請求項1記載の表面分析計システム。
- 表面からの散乱光を収集する少なくとも一つの検出器を備えた、表面からの散乱光を収集する散乱光集束アセンブリをさらに備えたことを特徴とする請求項1記載の表面分析計システム。
- 表面分析計アセンブリが、
ウエハー表面(122)上に放射光を指向させる放射光標的アセンブリと、
ウエハー表面(122)からの反射光を収集する反射光収集アセンブリと、
ウエハー(120)の端部表面(126)の周囲で表面分析計アセンブリを回転させる手段と、
ウエハー(120)の端部で単一または複数の欠陥を検出する手段を備えたことを特徴とする表面分析計アセンブリと、
を備えたことを特徴とするウエハー端部検査システム(110)。 - 表面分析計アセンブリが
ウエハーを回転させるスピンドル(328)と、
ウエハー(320)の中心軸を位置づけ、ウエハーの中心軸をスピンドル(328)に軸合わせするセンタリング・アセンブリをさらに備えたことを特徴とするシステム。 - ウエハー(120)の端部領域で単一または複数の欠陥を検知するための手段が、
反射光の単一または複数の反射率と、表面上の単一または複数の位置を相関づける反射率データ・セットを生成する信号プロセシング・モジュールを備えたことを特徴とする請求項15に記載のシステム。 - 入射偏光がS偏光、P偏光、Q偏光、または円偏光成分の少なくとも一つを含むことを特徴とする請求項16記載のシステム。
- ウエハー(120)の端部領域で単一または複数の欠陥を検知するための手段が、
反射率データ・セットからの反射率のバックグランド・ノイズ・レベルを設定し、
バックグランド・ノイズ・レベルより単一または複数の閾値の幅を設定し、
単一または複数の閾値の範囲外にある反射率を有するデータ・セット内の単一または複数の点を欠陥として指定することを特徴とする請求項14記載のシステム。 - ウエハー(120)の端部領域で単一または複数の欠陥を検知するための手段が、反射光の単一または複数の反射率と、表面上の単一または複数の位置を相関づける2次元ヒストグラムを生成する信号プロセシング・モジュールとを備えたことを特徴とする請求項14記載のシステム。
- ウエハー(120)の端部領域で単一または複数の欠陥を検知するための手段が、
2次元ヒストグラムを分析し、表面上の単一または複数の欠陥を位置づける欠陥検知モジュールを備えたことを特徴とする請求項14記載のシステム。 - ユーザー・インターフェイスにより、ユーザーへ欠陥を表示する表示モジュールを備えたことを特徴とする請求項14記載のシステム。
- 第一の光ビームをウエハー(422)の上へ向けさせ、
収束鏡(436、536)により表面から放射光検知器へ反射された光の一部を収集し、
表面(420)の特性を決定する検知器で受け取られた放射光の一部を分析することを特徴とするウエハー(420)の検査方法。 - 表面(422)へ第一放射光ビームを指向させることが、ウエハーの端部表面(426)の周囲で表面分析計アセンブリを回転させることを含むことを特徴とする請求項22記載の方法。
- 収束鏡(436、536)が、パラボラ収束鏡、楕円収束鏡、球面収束鏡の少なくとも一つを備えたことを特徴とする請求項22記載の方法。
- 検出器内で受け取られた光の一部を分析し表面の特性を決定することが、反射光の単一または複数の反射率と、表面上の単一または複数の位置を相関づける反射率データを生成することを含むことを特徴とする請求項22記載の方法。
- 入射光がS偏光、P偏光、またはQ偏光の少なくとも一つを含むことを特徴とする請求項23記載の方法。
- 検出器内で受け取られた光の一部を分析し表面の特性を決定することが、
反射率データ・セットからの反射率のバックグランド・ノイズ・レベルを設定し、
バックグランド・ノイズ・レベルより単一または複数の閾値の幅を設定し、
単一または複数の閾値の範囲外にある反射率を有するデータ・セット内の単一または複数の点を欠陥として指定することを特徴とする請求項22記載の方法。 - 検出器内で受け取られた光の一部を分析し表面(422)の特性を決定することが、
反射光の単一または複数の反射率と、表面上の単一または複数の位置を相関づける2次元ヒストグラムを生成することを特徴とする請求項22記載の方法。 - 2次元ヒストグラムを分析し、表面(422)上の単一または複数の欠陥を位置づけることをさらに含むことを特徴とする請求項28記載の方法。
- ユーザー・インターフェイスにより、ユーザーへ欠陥を表示することをさらに含むことを特徴とする請求項22記載の方法。
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/123,913 | 2005-05-06 | ||
US11/123,913 US7161667B2 (en) | 2005-05-06 | 2005-05-06 | Wafer edge inspection |
US11/196,540 | 2005-08-03 | ||
US11/196,540 US7161668B2 (en) | 2005-05-06 | 2005-08-03 | Wafer edge inspection |
US11/365,221 US7161669B2 (en) | 2005-05-06 | 2006-03-01 | Wafer edge inspection |
US11/365,221 | 2006-03-01 | ||
PCT/US2006/017385 WO2006121843A2 (en) | 2005-05-06 | 2006-05-05 | Wafer edge inspection |
Publications (2)
Publication Number | Publication Date |
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JP2008541058A true JP2008541058A (ja) | 2008-11-20 |
JP5390853B2 JP5390853B2 (ja) | 2014-01-15 |
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Application Number | Title | Priority Date | Filing Date |
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JP2008510249A Expired - Fee Related JP5390853B2 (ja) | 2005-05-06 | 2006-05-05 | 表面検査システム |
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Country | Link |
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US (2) | US7161667B2 (ja) |
JP (1) | JP5390853B2 (ja) |
CN (1) | CN101171506B (ja) |
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CN101171506B (zh) | 2012-07-25 |
US7161667B2 (en) | 2007-01-09 |
US20060250609A1 (en) | 2006-11-09 |
US7161668B2 (en) | 2007-01-09 |
JP5390853B2 (ja) | 2014-01-15 |
US20060250610A1 (en) | 2006-11-09 |
CN101171506A (zh) | 2008-04-30 |
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