Russell McCabe, R. Chaudhuri, S. Spangler, Lauren Kerstetter, Femi Aborisade, Raita Hoech
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Multiphased Process Optimization for CMP Variation Reduction in High Volume Manufacturing
Reducing reworks in manufacturing process is important for product quality, as well cycle time and cost impact. Contact oxide stop on film process has historically had one of the higher rework percentages due to underpolish. Variation in the process from various sources leading to thickness variation and challenges in process control, lead to these reworks. A multiple phase process conversion was started with intent of reducing cost, as well as reducing process variation, that results in the reworks.
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