WO2003036227A1 - Confocal wafer-inspection system and method - Google Patents

Confocal wafer-inspection system and method Download PDF

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Publication number
WO2003036227A1
WO2003036227A1 PCT/IL2002/000841 IL0200841W WO03036227A1 WO 2003036227 A1 WO2003036227 A1 WO 2003036227A1 IL 0200841 W IL0200841 W IL 0200841W WO 03036227 A1 WO03036227 A1 WO 03036227A1
Authority
WO
WIPO (PCT)
Prior art keywords
wafer
confocal
bumps
height
camera
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.)
Ceased
Application number
PCT/IL2002/000841
Other languages
English (en)
French (fr)
Inventor
Michael Geffen
Yaki Levi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Camtek Ltd
Original Assignee
Camtek Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11075841&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2003036227(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Camtek Ltd filed Critical Camtek Ltd
Priority to JP2003538682A priority Critical patent/JP4680501B2/ja
Priority to EP02777765A priority patent/EP1440285A1/en
Publication of WO2003036227A1 publication Critical patent/WO2003036227A1/en
Priority to US10/820,367 priority patent/US6934019B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/0004—Microscopes specially adapted for specific applications
    • G02B21/002—Scanning microscopes
    • G02B21/0024—Confocal scanning microscopes (CSOMs) or confocal "macroscopes"; Accessories which are not restricted to use with CSOMs, e.g. sample holders
    • G02B21/0052—Optical details of the image generation
    • G02B21/006—Optical details of the image generation focusing arrangements; selection of the plane to be imaged
    • G—PHYSICS
    • 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
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
    • G—PHYSICS
    • 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
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G01B11/0608—Height gauges
    • G—PHYSICS
    • 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
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/0004—Microscopes specially adapted for specific applications
    • G02B21/002—Scanning microscopes
    • G02B21/0024—Confocal scanning microscopes (CSOMs) or confocal "macroscopes"; Accessories which are not restricted to use with CSOMs, e.g. sample holders
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/0004—Microscopes specially adapted for specific applications
    • G02B21/002—Scanning microscopes
    • G02B21/0024—Confocal scanning microscopes (CSOMs) or confocal "macroscopes"; Accessories which are not restricted to use with CSOMs, e.g. sample holders
    • G02B21/0028—Confocal scanning microscopes (CSOMs) or confocal "macroscopes"; Accessories which are not restricted to use with CSOMs, e.g. sample holders specially adapted for specific applications, e.g. for endoscopes, ophthalmoscopes, attachments to conventional microscopes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
    • G01B2210/50—Using chromatic effects to achieve wavelength-dependent depth resolution

Definitions

  • a "bump” is a three-dimensional shape (half sphere or rectangular)
  • the bump shape is usually a half ball alike.
  • the main object of the present invention is that
  • CHMS Confocal Height Measuring System
  • CHMS Confocal Height Measuring System
  • an optic head that separates the light source to its basic
  • the confocal imaging optical setup is an optical setup for imaging
  • Field extension can be obtained by stretching the
  • a white light beam is separated to its basic wavelength beams by
  • the illumination is
  • the wavelength is detected by the spectrometer and translated to
  • the present invention is a confocal wafer-inspection system.
  • the wafer moves with the table
  • the wafer-inspection system furthermore, furthermore, furthermore, furthermore, furthermore, furthermore, further
  • the image or images of the scanning are used by the computer to recognize bumps, the computer stores location of the recognized bumps
  • wafer-inspection system is a digital camera.
  • wafer-inspection system is a line-scan camera.
  • the vertical movement means enables elevate and lower the
  • Figure 1 illustrates the confocal optic setup.
  • Figure 2 illustrates an embodiment of the confocal
  • Figure 3 illustrates the way of obtaining profiles of bumps.
  • the present invention is a confocal wafer-inspection system.
  • the system has a table with two vertical degrees of freedom
  • a wafer is
  • the second camera scans the wafer and recognizes the location of
  • the computer receives the scanned image
  • the wafer surface which crosses at least one time each of the bumps.
  • the confocal height measurement system continually measures the confocal height of the confocal height measurement system.
  • the computer When the aim line crosses a bump, the computer stores the
  • the computer compares between bumps
  • Figure 1 illustrates the confocal
  • a confocal imaging optical setup is an optical setup for
  • a white light beam is separated
  • Each color has a
  • the first color has a first sharply
  • the color is detected and so on.
  • the color is detected by a spectrometer and translated
  • Figure 2 illustrates an embodiment of the confocal
  • a computer 24 controls the vertical movement means 22 and the
  • height measurement system 26 are aimed 27 to the same point.
  • An inspected wafer 23 lies down on the table 21.
  • the computer 24
  • the microscope 30 observes the surface of the wafer 23 and the first
  • the second camera 29 scans the wafer and recognizes the location
  • the computer 24 receives the scanned image, builds a map of bumps location and designed a
  • the computer 24 leads the table 21, by means of the
  • measurement system 26 continually measures the wafer 23 surface height
  • the computer 24 stores the height profile of
  • the computer 24 compares between bumps height or checks
  • Figure 3 illustrates the way of obtaining profiles of bumps.
  • 3a shows a part of wafer surface 23 with bumps 31 on it.
  • height measurement system 26 continually measures the bumps 31 height
  • Figure 3b is a graphic

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Ophthalmology & Optometry (AREA)
  • Radiology & Medical Imaging (AREA)
  • Surgery (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)
PCT/IL2002/000841 2001-10-25 2002-10-21 Confocal wafer-inspection system and method Ceased WO2003036227A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2003538682A JP4680501B2 (ja) 2001-10-25 2002-10-21 共焦点ウェハ検査系
EP02777765A EP1440285A1 (en) 2001-10-25 2002-10-21 Confocal wafer inspection system and method
US10/820,367 US6934019B2 (en) 2001-10-25 2004-04-07 Confocal wafer-inspection system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL146174A IL146174A (en) 2001-10-25 2001-10-25 Confocal system for testing woofers
IL146174 2001-10-25

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/820,367 Continuation US6934019B2 (en) 2001-10-25 2004-04-07 Confocal wafer-inspection system

Publications (1)

Publication Number Publication Date
WO2003036227A1 true WO2003036227A1 (en) 2003-05-01

Family

ID=11075841

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2002/000841 Ceased WO2003036227A1 (en) 2001-10-25 2002-10-21 Confocal wafer-inspection system and method

Country Status (5)

Country Link
US (1) US6934019B2 (enExample)
EP (1) EP1440285A1 (enExample)
JP (1) JP4680501B2 (enExample)
IL (1) IL146174A (enExample)
WO (1) WO2003036227A1 (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647799A1 (de) * 2004-10-12 2006-04-19 Precitec Optronik GmbH Kalibrierung eines Oberflächenmesssystems
CN1300563C (zh) * 2005-03-24 2007-02-14 华中科技大学 一种微型三维自扫描共焦显微镜
WO2009049834A3 (en) * 2007-10-16 2009-06-18 Eric Gurny Optical sensor device
US10317344B2 (en) 2016-09-07 2019-06-11 Kla-Tencor Corporation Speed enhancement of chromatic confocal metrology
DE102006050834B4 (de) 2005-10-28 2022-05-25 Rudolph Technologies, Inc. Grabenmesssystem mit einem chromatischen konfokalen Höhensensor und einem Mikroskop
DE102008004438B4 (de) 2007-01-15 2024-06-06 Disco Corp. Laserstrahlbearbeitungsvorrichtung

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US6324298B1 (en) * 1998-07-15 2001-11-27 August Technology Corp. Automated wafer defect inspection system and a process of performing such inspection
US7551272B2 (en) * 2005-11-09 2009-06-23 Aceris 3D Inspection Inc. Method and an apparatus for simultaneous 2D and 3D optical inspection and acquisition of optical inspection data of an object
JP2007225481A (ja) * 2006-02-24 2007-09-06 Hitachi High-Technologies Corp ボールバンプウエハ検査装置
DE102006036504A1 (de) * 2006-08-04 2008-02-07 Vistec Semiconductor Systems Gmbh Vorrichtung und Verfahren zur Messung des Höhenprofils eines strukturierten Substrats
US7535560B2 (en) * 2007-02-26 2009-05-19 Aceris 3D Inspection Inc. Method and system for the inspection of integrated circuit devices having leads
US7990522B2 (en) 2007-11-14 2011-08-02 Mitutoyo Corporation Dynamic compensation of chromatic point sensor intensity profile data selection
US7873488B2 (en) * 2008-12-08 2011-01-18 Mitutoyo Corporation On-site calibration method and object for chromatic point sensors
US8144968B2 (en) * 2009-01-12 2012-03-27 Aceris 3D Inspection Inc. Method and apparatus for scanning substrates
TWI490444B (zh) * 2009-01-23 2015-07-01 Univ Nat Taipei Technology 線型多波長共焦顯微方法與系統
FR2942533B1 (fr) * 2009-02-25 2011-06-24 Altatech Semiconductor Dispositif et procede d'inspection de plaquettes semi-conductrices
US7876456B2 (en) * 2009-05-11 2011-01-25 Mitutoyo Corporation Intensity compensation for interchangeable chromatic point sensor components
US8860931B2 (en) 2012-02-24 2014-10-14 Mitutoyo Corporation Chromatic range sensor including measurement reliability characterization
US8928874B2 (en) 2012-02-24 2015-01-06 Mitutoyo Corporation Method for identifying abnormal spectral profiles measured by a chromatic confocal range sensor
EP3208585B1 (en) * 2013-05-27 2019-11-27 GasPorOx AB System and method for determining a concentration of a gas in a container
US9772297B2 (en) 2014-02-12 2017-09-26 Kla-Tencor Corporation Apparatus and methods for combined brightfield, darkfield, and photothermal inspection
US9885671B2 (en) 2014-06-09 2018-02-06 Kla-Tencor Corporation Miniaturized imaging apparatus for wafer edge
US9645097B2 (en) 2014-06-20 2017-05-09 Kla-Tencor Corporation In-line wafer edge inspection, wafer pre-alignment, and wafer cleaning
US9261351B1 (en) * 2015-03-04 2016-02-16 Mitutoyo Corporation Chromatic range sensor including high sensitivity measurement mode
EP3222965B1 (en) 2016-03-25 2020-01-15 Fogale Nanotech Chromatic confocal device and method for 2d/3d inspection of an object such as a wafer with variable spatial resolution
EP3222964B1 (en) 2016-03-25 2020-01-15 Fogale Nanotech Chromatic confocal device and method for 2d/3d inspection of an object such as a wafer
JP6919458B2 (ja) * 2017-09-26 2021-08-18 オムロン株式会社 変位計測装置、計測システム、および変位計測方法
CN112147622B (zh) * 2020-09-02 2024-02-06 Oppo广东移动通信有限公司 测距装置、测距方法、摄像头及电子设备
EP4291854A1 (en) * 2021-02-15 2023-12-20 Amgen, Inc Systems and methods for automated in-line plunger depth measurement
CN120426883A (zh) * 2025-06-05 2025-08-05 中国计量科学研究院 一种晶圆几何特征的光谱共焦测量设备及方法

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US5991040A (en) 1995-06-30 1999-11-23 Siemens Aktiengesellschaft Optical distance sensor
EP0916981A1 (en) * 1997-11-17 1999-05-19 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Confocal spectroscopy system and method
US6167148A (en) 1998-06-30 2000-12-26 Ultrapointe Corporation Method and system for inspecting the surface of a wafer
WO2001051885A1 (en) * 2000-01-12 2001-07-19 Inspectech Ltd. A method and system for measuring bumps height

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647799A1 (de) * 2004-10-12 2006-04-19 Precitec Optronik GmbH Kalibrierung eines Oberflächenmesssystems
CN1300563C (zh) * 2005-03-24 2007-02-14 华中科技大学 一种微型三维自扫描共焦显微镜
DE102006050834B4 (de) 2005-10-28 2022-05-25 Rudolph Technologies, Inc. Grabenmesssystem mit einem chromatischen konfokalen Höhensensor und einem Mikroskop
DE102008004438B4 (de) 2007-01-15 2024-06-06 Disco Corp. Laserstrahlbearbeitungsvorrichtung
WO2009049834A3 (en) * 2007-10-16 2009-06-18 Eric Gurny Optical sensor device
US8736846B2 (en) 2007-10-16 2014-05-27 Werth Messtechnik Gmbh Optical sensor device
US10317344B2 (en) 2016-09-07 2019-06-11 Kla-Tencor Corporation Speed enhancement of chromatic confocal metrology

Also Published As

Publication number Publication date
IL146174A0 (en) 2002-07-25
US20050030528A1 (en) 2005-02-10
EP1440285A1 (en) 2004-07-28
IL146174A (en) 2007-08-19
US6934019B2 (en) 2005-08-23
JP2005506710A (ja) 2005-03-03
JP4680501B2 (ja) 2011-05-11

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