Real time process monitoring using diffraction-based overlay measurements from YieldStar

Henry Chen, Jimmy Chang, Sheng-Tsung Tsao, Junjun Zhang, Jie Du, Congcong Fan, Alex Huang, David Xu, Sam Liu, Liang Wu, Kimi Yang, Ning Gu, L. Ren, Jian Wu, A. Tan, Sunny Xia, Ivan Mao
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引用次数: 1

Abstract

Real-time process monitoring (RTPM) is a method for semiconductor manufacturing monitoring and tuning using a physical prediction model. It is a fast and nondestructive process excursion measurement method which takes inputs from diffraction-based overlay measurements from YieldStar. The prediction model is created by a physical model which receives standard manufacturing information as input. The prediction capability has been validated in a manufacturing environment experiment with thin film thickness prediction difference less than 3%.
使用YieldStar基于衍射的叠加测量进行实时过程监控
实时过程监控(RTPM)是一种利用物理预测模型对半导体制造过程进行监控和调优的方法。它是一种快速、无损的过程偏移测量方法,其输入来自YieldStar基于衍射的叠加测量。预测模型由物理模型创建,该模型接收标准制造信息作为输入。在制造环境实验中验证了预测能力,薄膜厚度预测误差小于3%。
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