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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/28376

Title: An unsupervised neural network approach for automatic semiconductor wafer defect inspection
Authors: Chuan-Yu Chang;ChunHsi Li;Jia-Wei Chang;MuDer Jeng
Contributors: NTOU:Department of Electrical Engineering
Keywords: Wafer inspection;Self-organizing neural network;Unsupervised learning
Date: 2007-01
Issue Date: 2011-10-21T02:37:20Z
Publisher: Expert Systems with Applications
Abstract: Abstract:Semiconductor wafer defect inspection is an important process before die packaging. The defective regions are usually identified through visual judgment with the aid of a scanning electron microscope. Dozens of people visually check wafers and hand-mark their defective regions. Consequently, potential misjudgment may be introduced due to human fatigue. In addition, the process can incur significant personnel costs. Prior work has proposed automated visual wafer defect inspection that is based on supervised neural networks. Since it requires learned patterns specific to each application, its disadvantage is the lack of product flexibility. Self-organizing neural networks (SONNs) have been proven to have the capabilities of unsupervised auto-clustering. In this paper, an automatic wafer inspection system based on a self-organizing neural network is proposed. Based on real-world data, experimental results show, with good performance, that the proposed method successfully identifies the defective regions on wafers.
Relation: 36(1), PP.950-958
URI: http://ntour.ntou.edu.tw/handle/987654321/28376
Appears in Collections:[電機工程學系] 期刊論文

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