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    Analysis of plasma etch defects utilizing a comb test structure

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    Author
    DeLoach, Charles Alan, 1960-
    Issue Date
    1992
    Keywords
    Engineering, Electronics and Electrical.
    Advisor
    Parks, Harold G.
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Three metal compositions are patterned via plasma etching into comb structures. The comb structures have pitches of 4 μm, 5 μm, 7 μm and 12 μm, with a line width of 2 μm, on a field oxide of 8,000 Angstroms thickness, using <111> p-type substrates. These comb test structures have been used to determine the number of bridges, and thus the yield, of the metal compositions: pure aluminum, silicon(2%)-aluminum, and copper(0.5%)-silicon(2%)-aluminum. Bridge failures are photographed and classified according to the source of the defect. The defects due to plasma particles are used to determine a yield model for this etch process. Through the use of yield model and test structure data the etch process is evaluated for the different metal systems. This allows a quantitative comparison of the systems in terms of defect clustering, defect density and defect size distribution, and hence projections for the best yielding process via the yield model.
    Type
    text
    Thesis-Reproduction (electronic)
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Graduate College
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

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