27 August 2014 Improved quality control of silicon wafers using novel off-line air pocket image analysis
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Abstract
Air pockets (APK) occur randomly in Czochralski (Cz) grown silicon (Si) crystals and may become included in wafers after slicing and polishing. Previously the only APK of interest were those that intersected the front surface of the wafer and therefore directly impacted device yield. However mobile and other electronics have placed new demands on wafers to be internally APK-free for reasons of thermal management and packaging yield. We present a novel, recently patented, APK image processing technique and demonstrate the use of that technique, off-line, to improve quality control during wafer manufacturing.
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John F. Valley, John F. Valley, M. Cristina Sanna, M. Cristina Sanna, } "Improved quality control of silicon wafers using novel off-line air pocket image analysis", Proc. SPIE 9173, Instrumentation, Metrology, and Standards for Nanomanufacturing, Optics, and Semiconductors VIII, 91730A (27 August 2014); doi: 10.1117/12.2060227; https://doi.org/10.1117/12.2060227
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