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Iterative Cluster Harvesting for Wafer Map Defect Patterns
April 25, 2024, 7:45 p.m. | Alina Pleli, Simon Baeuerle, Michel Janus, Jonas Barth, Ralf Mikut, Hendrik P. A. Lensch
cs.CV updates on arXiv.org arxiv.org
Abstract: Unsupervised clustering of wafer map defect patterns is challenging because the appearance of certain defect patterns varies significantly. This includes changing shape, location, density, and rotation of the defect area on the wafer. We present a harvesting approach, which can cluster even challenging defect patterns of wafer maps well. Our approach makes use of a well-known, three-step procedure: feature extraction, dimension reduction, and clustering. The novelty in our approach lies in repeating dimensionality reduction and …
abstract arxiv cluster clustering cs.cv iterative location map patterns rotation type unsupervised
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