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- W4313121468 abstract "Abstract In semiconductor manufacturing, clustering the fab-wide wafer map images is of critical importance for practitioners to understand the subclusters of wafer defects, recognize novel clusters or anomalies, and develop fast reactions to quality issues. However, due to the high-mix manufacturing of diversified wafer products of different sizes and technologies, it is difficult to cluster the wafer map images across the fab. This paper addresses this challenge by proposing a novel methodology for fab-wide wafer map data clustering. In the proposed methodology, a well-known deep learning technique, vision transformer with multi-head attention is first trained to convert binary wafer images of different sizes into condensed feature vectors for efficient clustering. Then, the Topological Data Analysis (TDA), which is widely used in biomedical applications, is employed to visualize the data clusters and identify the anomalies. The TDA yields a topological representation of high-dimensional big data as well as its local clusters by creating a graph that shows nodes corresponding to the clusters within the data. The effectiveness of the proposed methodology is demonstrated by clustering the public wafer map dataset WM-811k from the real application which has a total of 811,457 wafer map images. We further demonstrate the potential applicability of topology data analytics in the semiconductor area by visualization." @default.
- W4313121468 created "2023-01-06" @default.
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- W4313121468 date "2022-06-27" @default.
- W4313121468 modified "2023-10-16" @default.
- W4313121468 title "A Novel Quality Clustering Methodology on Fab-Wide Wafer Map Images in Semiconductor Manufacturing" @default.
- W4313121468 doi "https://doi.org/10.1115/msec2022-85670" @default.
- W4313121468 hasPublicationYear "2022" @default.
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