JPH07503793A - パターニングされた基板の光学検査用装置 - Google Patents
パターニングされた基板の光学検査用装置Info
- Publication number
- JPH07503793A JPH07503793A JP5514153A JP51415393A JPH07503793A JP H07503793 A JPH07503793 A JP H07503793A JP 5514153 A JP5514153 A JP 5514153A JP 51415393 A JP51415393 A JP 51415393A JP H07503793 A JPH07503793 A JP H07503793A
- Authority
- JP
- Japan
- Prior art keywords
- light
- filter
- image
- spatial filter
- plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
-
- 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
- G01N21/94—Investigating contamination, e.g. dust
-
- 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
- G01N21/956—Inspecting patterns on the surface of objects
- G01N21/95623—Inspecting patterns on the surface of objects using a spatial filtering method
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels, explosives
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/46—Systems using spatial filters
-
- 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
Abstract
Description
Claims (10)
- 1.光をフーリエ平面または表面中へ回折するタイプの周期的特徴を有する、パ ターニングされた半導体ウエハ等の基板のための検査装置であって、 基板の光学軸に沿って配向されたビームを発生する広帯域の光源を含み、基板は 非周期的な汚染物質および欠陥とともに反復的な周期的特徴のパターンを有し、 前記周期的特徴は複数個のスペクトル分散次数の形の複数個のスペクトル線に前 記ビームからの光を回折する間隔を有し、スペクトル線の各次数は長いバンドを 形成し、さらに前記ビームがそこを通過しかつ基板の前記周期的特徴上へ集めら れる状態で前記光学軸に沿って配置された開口絞りと、 基板から回折された光のフーリエ平面中に配置されたほぼ透過性の空間フィルタ とを含み、フィルタは前記光のバンドをブロックするが前記非周期的な特徴から 散乱した光は透過する複数個の不透明なトラックを有し、さらに前記空間フィル タを透過した光を受ける位置に前記空間フィルタから間隔をあけて設置された二 次元撮像センサと、空間フィルタを通過する光を前記撮像センサへ送るための手 段とを含む、装置。
- 2.前記空間フィルタはフーリエ変換フィルタである、請求項1に記載の装置。
- 3.前記フーリエ変換フィルタは、高コントラストフィルムが前記フーリエ平面 からわずかに離れた焦点の合っていない位置に載置された状態で写真で形成され ており、これにより前記フィルタは完全なフーリエ変換フィルタよりもわずかに 大きな不透明なトラックを有する、請求項2に記載の装置。
- 4.前記空間フィルタは、任意の所与の場所で、前記周期的特徴によってそこに 回折される光の色に対して不透明であるトラックを有する可変波長(色)ブロッ クフィルタである、請求項1に記載の装置。
- 5.前記空間フィルタの前記不透明なトラックは見かけ上の中心から外向きに放 射状にのびる、請求項1に記載の装置。
- 6.前記光学軸は基板に対して垂直であり、前記光源からの前記ビームは前記光 学軸に沿ってビームスプリッタによって導かれて前記基板上に通常どおり入射す る、請求項1に記載の装置。
- 7.前記フーリエ平面の画像を前記空間フィルタの位置にアクセス可能な画像平 面中に生成するためのリレー光学系手段をさらに含み、前記光学フィルタは前記 画像平面中に配置される、請求項1に記載の装置。
- 8.前記撮像センサはCCDアレイである、請求項1に記載の装置。
- 9.前記撮像センサはビジコンカメラである、請求項1に記載の装置。
- 10.前記撮像センサはTDIセンサである、請求項1に記載の装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US832,379 | 1992-02-07 | ||
US07/832,379 US5264912A (en) | 1992-02-07 | 1992-02-07 | Speckle reduction track filter apparatus for optical inspection of patterned substrates |
PCT/US1993/000935 WO1993016373A1 (en) | 1992-02-07 | 1993-02-02 | Apparatus for optical inspection of patterned substrates |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07503793A true JPH07503793A (ja) | 1995-04-20 |
JP3458139B2 JP3458139B2 (ja) | 2003-10-20 |
Family
ID=25261477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51415393A Expired - Lifetime JP3458139B2 (ja) | 1992-02-07 | 1993-02-02 | パターニングされた基板の光学検査用装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US5264912A (ja) |
JP (1) | JP3458139B2 (ja) |
KR (1) | KR100246268B1 (ja) |
TW (1) | TW243555B (ja) |
WO (1) | WO1993016373A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10325711A (ja) * | 1997-05-23 | 1998-12-08 | Hitachi Ltd | 検査方法およびその装置並びに半導体基板の製造方法 |
JP2007333729A (ja) * | 2006-05-05 | 2007-12-27 | Asml Netherlands Bv | 検査方法およびそれを使用する装置 |
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-
1993
- 1993-02-02 KR KR1019940702709A patent/KR100246268B1/ko not_active IP Right Cessation
- 1993-02-02 JP JP51415393A patent/JP3458139B2/ja not_active Expired - Lifetime
- 1993-02-02 WO PCT/US1993/000935 patent/WO1993016373A1/en active Application Filing
- 1993-02-27 TW TW082101442A patent/TW243555B/zh not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10325711A (ja) * | 1997-05-23 | 1998-12-08 | Hitachi Ltd | 検査方法およびその装置並びに半導体基板の製造方法 |
JP2007333729A (ja) * | 2006-05-05 | 2007-12-27 | Asml Netherlands Bv | 検査方法およびそれを使用する装置 |
Also Published As
Publication number | Publication date |
---|---|
TW243555B (ja) | 1995-03-21 |
JP3458139B2 (ja) | 2003-10-20 |
US5264912A (en) | 1993-11-23 |
KR100246268B1 (ko) | 2000-04-01 |
WO1993016373A1 (en) | 1993-08-19 |
KR950700534A (ko) | 1995-01-16 |
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