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    Correlating Coefficient of Friction and Shear Force to Platen Motor Current in Tungsten and Interlayer Dielectric Chemical Mechanical Planarization at Highly Non-Steady-State Conditions

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    Name:
    COF-PMC-NSS-RH-Manuscript-1010 ...
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    2.499Mb
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    Description:
    Final Accepted Manuscript
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    Author
    Headley, R.
    Frank, C.
    Sampurno, Y.
    Philipossian, A.
    Affiliation
    Univ Arizona, Dept Chem & Environm Engn
    Issue Date
    2019-10-16
    
    Metadata
    Show full item record
    Publisher
    ELECTROCHEMICAL SOC INC
    Citation
    Headley, R., Frank, C., Sampurno, Y., & Philipossian, A. (2019). Correlating Coefficient of Friction and Shear Force to Platen Motor Current in Tungsten and Interlayer Dielectric Chemical Mechanical Planarization at Highly Non-Steady-State Conditions. ECS Journal of Solid State Science and Technology, 8(10), P634-P645.
    Journal
    ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
    Rights
    © 2019 The Electrochemical Society.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Correlations between shear force and platen motor current (PMC), as well as those between coefficient of friction (COF) and PMC were investigated for various tungsten and interlayer dielectric (ILD) chemical mechanical planarization (CMP) cases where the processes were highly non steady-state. We chose to initially focus on non-steady-state conditions because we believed the relationships among shear force, COF and platen motor current to be clearer as opposed to steady-state conditions. Shear force, normal force and PMC data were collected from twelve different Stribeck+ curves at an acquisition frequency of 1,000 Hz and analyzed in order to determine any emerging trends. For the 12 cases, involving 8 pre-polished blanket CVD tungsten and 4 silicon dioxide blanket wafers, it was discovered that PMC closely mirrored shear force as evidenced by a high average correlation coefficient (0.955) and coefficient of determination (0.916) obtained from all runs. For COF vs. PMC, the average correlation coefficient and coefficient of determination for all cases were 0.758 and 0.608, respectively. These average values were dragged down by 5 cases in which the dominant tribological mechanism was found to be "boundary lubrication" where COF changed minimally with pseudo-Sommerfeld number. (C) 2019 The Electrochemical Society.
    ISSN
    2162-8769
    DOI
    10.1149/2.0251910jss
    Version
    Final accepted manuscript
    ae974a485f413a2113503eed53cd6c53
    10.1149/2.0251910jss
    Scopus Count
    Collections
    UA Faculty Publications

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