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논문 기본 정보

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(인하대학교) (인하대학교) (인하대학교)
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한국멀티미디어학회 멀티미디어학회논문지 멀티미디어학회논문지 제28권 제10호
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    초록·키워드

    This paper proposes a data augmentation–based oversampling technique to mitigate severe class imbalance and improve the classification performance of wafer map defect patterns in semiconductor manufacturing. Using the publicly available WM-811k dataset, the training data—excluding the dominant None class—are augmented to match different proportions of the None class (0%, 25%, 50%, and 100%) in order to determine the most effective augmentation level. Three deep learning models— DenseNet121, EfficientNet-B2, and ResNet50—are employed for performance benchmarking. In addition to overall accuracy, evaluation metrics that account for class imbalance, namely the Geometric Mean (GM) and Weighted Geometric Mean (GM+), are used to assess model effectiveness. Experimental results show that ResNet50 yields the most stable performance in terms of GM+, and that 50% augmentation achieves comparable results to full (100%) augmentation, indicating that excessive augmentation may be unnecessary. These findings suggest that rotation-based oversampling tailored to the characteristics of wafer maps significantly enhances defect pattern classification and can support the development of machine-learning-based defect analysis systems in semiconductor manufacturing.

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      UCI(KEPA) : I410-151-26-02-094557529