Improvement of virtual metrology performance by removing metrology noises in a training dataset

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• 作者：Dongil Kim (1)
  Pilsung Kang (2)
  Seung-kyung Lee (1)
  Seokho Kang (1)
  Seungyong Doh (3)
  Sungzoon Cho (1)
  
  1. Department of Industrial Engineering ; Seoul National University ; 1 Gwanak ro ; Gwanak-gu ; Seoul ; 151-744 ; Republic of Korea
  2. IT Management Program ; International Fusion School ; Seoul National University of Science and Technology ; 232 Gongneung ro ; Nowon-gu ; Seoul ; 139-743 ; Republic of Korea
  3. SAMSUNG SDS Co. ; Ltd. ; Nongseo-dong ; Giheung-gu ; Yongin ; Gyeonggi-do ; Republic of Korea
  
• 关键词：Semiconductor manufacturing ; Virtual metrology ; Noise identification and removal ; Novelty detection
• 刊名：Pattern Analysis & Applications
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：18
• 期：1
• 页码：173-189
• 全文大小：1,534 KB
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• 刊物类别：Computer Science
• 刊物主题：Pattern Recognition
  
• 出版者：Springer London
• ISSN：1433-755X

文摘

Virtual metrology (VM) has been applied to semiconductor manufacturing processes for the quality management of wafers. However, noises included in training datasets degrade the performance of VM, which is a key obstacle to the application of VM in real-world semiconductor manufacturing processes. In this paper, we develop a VM dataset construction method by identifying and removing noises. We define noises by considering both input and output variables and classify noises into fault detection and classification (FDC) noises and metrology noises, which have abnormal FDC variables and normal metrology variables, and normal FDC variables and abnormal metrology variables, respectively. We propose the construction of a VM training dataset including FDC noises and excluding metrology noises. By employing novelty detection methods, the normal/abnormal regions of FDC variables are identified. In experiments conducted on a real-world photolithography (photo) data, VM models trained with the dataset constructed by the proposed method showed the best accuracy and the most robustness.