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    • 39. 发明授权
    • Spectroscopic rotating compensator ellipsometer system with pseudo-achromatic retarder system
    • 具有伪消色差延迟器系统的光谱旋转补偿器椭偏仪系统
    • US06822738B1
    • 2004-11-23
    • US10034800
    • 2001-12-28
    • Blaine D. JohsCraig M. Herzinger
    • Blaine D. JohsCraig M. Herzinger
    • G01N2100
    • G01J3/447G01J3/0224G01J4/00G01J2003/2866G01N21/211
    • Disclosed is a spectroscopic Ellipsometer having pseudo-achromatic compensator(s) having fast axes which vary with wavelength and which provide, a range of retardations, (that is, maximum retardance minus minimum retardance), of less than 90 degrees over a range of wavelengths, said range of retardations being bounded by a minimum of preferably at least 30 degrees, to a maximum of less than 135 degrees. Calibration is achieved by a Mathematical Regression based technique involving, where desirable, Parameterization of Calibration Parameters. Various Dimensional Data Set(s) obtained with the Spectroscopic Ellipsometer configured in a Sample, present” or in a Straight-through” configuration, are variously normalized to D.C., A.C. or combination D.C. and A.C. components. Sample analysis using a detector provided intensity signal simultaneously comprising 2&ohgr; and 4&ohgr; signals simultaneously, and use of un-normalized A.C. and/or D.C. signals in reflectance monitoring are also disclosed.
    • 公开了一种光谱椭圆计,其具有伪波消除补偿器,其具有随波长变化的快轴,并且在波长范围内提供小于90度的延迟范围(即最大延迟减去最小延迟) 所述延迟范围由最小至少30度的最小值限制到最大不超过135度。 通过基于数学回归的技术实现校准,该技术涉及校准参数的参数化。 使用配置在样品中的“或”直通“配置的样品中的光谱椭圆计数器获得的各种尺寸数据集被不同地归一化为D.C.,A.C.或组合D.C.和A.C.组分。 还公开了使用检测器提供的同时包含2omega和4omega信号的强度信号的样本分析,并且还公开了在反射率监测中使用未归一化的交直流信号和/或直流信号。