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You searched on: Author: bryan barnes

Displaying records 31 to 38.
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31. Optical Through-Focus Technique that Differentiates Small Changes in Line Width, Line Height and Sidewall Angle for CD, Overlay, and Defect Metrology Applications
Published: 4/16/2008
Authors: Ravikiran Attota, Richard M Silver, Bryan M Barnes
Abstract: We present a new optical technique for dimensional analysis of sub 100 nm sized targets by analyzing through-focus images obtained using a conventional bright-field optical microscope.  We present a method to create through-focus image maps (TFIM) us ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824634

32. Optical Critical Dimension Measurement of Silicon Grating Targets Using Back Focal Plane Scatterfield Microscopy
Published: 1/2/2008
Authors: Heather J Patrick, Ravikiran Attota, Bryan M Barnes, Thomas Avery Germer, Michael T. Stocker, Richard M Silver, Michael R Bishop
Abstract: We demonstrate optical critical dimension measurement of lines in silicon grating targets using back focal plane scatterfield microscopy. In this technique, angle-resolved diffraction signatures are obtained from grating targets by imaging the back ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841060

33. Extending the Limits of Image-Based Optical Metrology
Published: 6/20/2007
Authors: Richard M Silver, Bryan M Barnes, Ravikiran Attota, Jay Shi Jun, Michael T. Stocker, Egon Marx, Heather J Patrick
Abstract: We have developed a set of techniques, referred to as scatterfield microscopy, in which the illumination is engineered in combination with appropriately designed metrology targets. Previously we reported results from samples with sub-50 nm sized fea ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823218

34. Zero-Order Imaging of Device-Sized Overlay Targets Using Scatterfield Microscopy
Published: 3/1/2007
Authors: Bryan M Barnes, Lowell P. Howard, P Lipscomb, Richard M Silver
Abstract: Patterns of lines and trenches with nominal linewidths of 50 nm have been proposed for use as an overlay target appropriate for placement inside the patterned wafer die.  The NIST Scatterfield Targets feature groupings of eight lines and/or tren ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823225

35. Fundamental Limits of Optical Critical Dimension Metrology: A Simulation Study
Published: 1/1/2007
Authors: Richard M Silver, Thomas Avery Germer, Ravikiran Attota, Bryan M Barnes, B Bunday, J Allgair, Egon Marx, Jay Shi Jun
Abstract: This paper is a comprehensive summary and analysis of a SEMATECH funded project to study the limits of optical critical dimension scatterometry.  The project was focused on two primary elements: 1) the comparison, stability, and validity of indu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823227

36. Illumination Optimization for Optical Semiconductor Metrology
Published: 9/1/2006
Authors: Bryan M Barnes, L Howard, Richard M Silver
Abstract: Uniform sample illumination via K hler illumination, is achieved by establishing a pair of conjugate focal planes; a light source is focused onto the condenser lens aperture while the image of the field aperture is focused at the plane of the specime ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823214

37. Koehler Illumination for High-Resolution Optical Metrology
Published: 3/1/2006
Authors: Martin Y Sohn, Bryan M Barnes, Lowell P. Howard, Richard M Silver, Ravikiran Attota, Michael T. Stocker
Abstract: Accurate preparation of illumination is critical for high-resolution optical metrology applications such as line width and overlay measurements. To improve the detailed evaluation and alignment of the illumination optics, we have separated Koehler il ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823207

38. The Limits of Image-Based Optical Metrology
Published: 3/1/2006
Authors: Richard M Silver, Bryan M Barnes, Ravikiran Attota, Jay Shi Jun, James J Filliben, Juan Soto, Michael T. Stocker, P Lipscomb, Egon Marx, Heather J Patrick, Ronald G Dixson, Robert D. Larrabee
Abstract: An overview of the challenges encountered in imaging device-sized features using optical techniques recently developed in our laboratories is presented in this paper.  We have developed a set of techniques we refer to as scatterfield microscopy ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823206



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