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Discrete polarization state rotatable compensator spectroscopic ellipsometer system, and method of calibration
Discrete polarization state rotatable compensator spectroscopic ellipsometer system, and method of calibration
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机译:离散偏振态可旋转补偿器光谱椭偏仪系统及校准方法
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摘要
Disclosed are spectroscopic ellipsometer and combined spectroscopic reflectometer/ellipsometer systems. The spectroscopic ellipsometer system portion includes polarizer and analyzer elements which remain fixed in position during data acquisition, and a step-wise rotatable compensator electromagnetic beam transmitting means, which serves to enable imposing a plurality of sequentially discrete, rather than continuously varying, polarization states on said beam of electromagnetic radiation. Further disclosed is a calibration procedure for said spectroscopic ellipsometer system portion of the invention which involves the gathering of, for each of a plurality of ellipsometrically distinct sample systems, spectroscopic data at a sequential plurality of discrete electromagnetic radiation beam polarization states, combined with providing of a mathematical model of the spectroscopic ellipsometer system and application of a mathematical regression procedure.
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