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Grey forecasting run-to-run control system in copper chemical mechanical polishing

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Abstract

In this paper, an online grey forecasting run-to-run control system was proposed with the integration of run-to-run control system, recursive least-squares (RLS) algorithm, and grey forecasting model (GFM). One of the objectives of this study is to explore the possibility and feasibility of applying GFM to run-to-run control system in copper chemical mechanical polishing. Under the condition of limited experiment data, GFM is excellent at estimating and forecasting error of the next batch online. To keep the process under control, the controllers are then employed to adjust the process parameters in order to compensate the error. In addition, the RLS algorithm is used to construct dynamically a system estimation matrix for the purpose of stating precisely the relationship between process quality and process parameters, and to consequently improve processing performances. From the computer simulation and the experiment results, the proposed new method developed in this study was able not only to confine the processing performances’ error within the range of 5% but also to supplement, when the process parameters are saturated, the control capability through adjusting other unsaturated process parameters, thus maintaining good processing performances.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Chung-Hsing University, Taichung, Taiwan

    Gou-Jen Wang & Kou-Ning Loh

  2. Graduate Institute of Industrial Engineering, National Taiwan University, Taipei, Taiwan

    Ming-Tzong Wang & Feng-Cheng Yang

  3. Department of Industrial Management, Oriental Institute of Technology, Taipei, Taiwan

    Min-Liang Huang

  4. Department of Industrial Engineering and Management, Ching Yun University, Jongli, Taiwan

    Jacob Chen

Authors
  1. Gou-Jen Wang
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  2. Ming-Tzong Wang
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  3. Feng-Cheng Yang
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  5. Kou-Ning Loh
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  6. Jacob Chen
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Correspondence to Ming-Tzong Wang.

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Wang, GJ., Wang, MT., Yang, FC. et al. Grey forecasting run-to-run control system in copper chemical mechanical polishing. Int J Adv Manuf Technol 41, 48–56 (2009). https://doi.org/10.1007/s00170-008-1452-2

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  • DOI: https://doi.org/10.1007/s00170-008-1452-2

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