Abstract
The effect of metal contamination and silicon surface defects on the gate oxide yield is investigated. The characteristics of various cleaning procedures are studied and correlated with the integrity of thin gate oxides. The standard wet cleaning recipe is optimized and a new cleaning strategy is proposed. Selective contamination experiments in chemicals are used to investigate the effect of small amounts of metal contaminants on the gate oxide integrity. HF-last processes are investigated and a new wet cleaning strategy is proposed.
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