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    • 54. 发明授权
    • System and method for improving data acquisition capability in
spectroscopic ellipsometers
    • 用于提高光谱椭偏仪数据采集能力的系统和方法
    • US5757494A
    • 1998-05-26
    • US422346
    • 1995-04-14
    • Steven E. GreenCraig M. HerzingerBlaine D. JohsJohn A. Woollam
    • Steven E. GreenCraig M. HerzingerBlaine D. JohsJohn A. Woollam
    • C23C14/54G01J3/447G01J4/00G01N21/21G01N23/20
    • C23C14/54G01J3/447G01J4/00G01N21/211G01N23/20058
    • The present invention is applicable generally to Spectroscopic Rotatable and Rotating Element Ellipsometers which utilize a relatively large range of wavelengths. Disclosed is a system and method for controlling the polarization state of a polarized beam of light so that it is in a range where the sensitivity of a Polarization State Detector used to measure changes in said polarized beam of light resulting from interaction with a Sample System, to noise and measurement errors etc., is reduced. Exemplified is a system, and method of use, for simultaneously setting both measured ellipsometric ALPHA, and ellipsometric BETA parameter values, (or equivalents), within ranges, in which ranges the sensitivity of transfer functions, and mathematical regressions which utilize said ellipsometric ALPHA and ellipsometric BETA values in the calculation of sample system characterizing PSI and DELTA constant values, to noise and errors in measurement etc., is found to be negligible. The present invention allows obtaining accurate and precise sample system PSI and DELTA Values from an Ellipsometer System in which a polarized beam of light is oriented at other than a Principal of Brewster Angle of Incidence to a sample system, allows determination of DELTA values in ranges otherwise not impossible, allows determination of the "Handedness" of a polarized beam of light, and provides means for determining all of Stokes Vector and Mueller Matrix component values. The present invention also provides means for making all system components added to a conventional ellipsometer system essentially end user transparent when desired, without removal thereof from said ellipsometer system.
    • 本发明一般适用于使用相对较大波长范围的光谱可旋转和旋转元件椭偏仪。 公开了一种用于控制偏振光束的偏振状态的系统和方法,使得其处于用于测量由与样品系统相互作用产生的所述偏振光束的变化的极化状态检测器的灵敏度, 降噪,测量误差等。 举例说明的是一种系统和使用方法,用于在范围内同时设置测量的椭圆偏振ALPHA和椭圆偏振BETA参数值(或等价物),其范围内的传递函数的灵敏度和使用所述椭圆偏振ALPHA的数学回归和 发现表征PSI和DELTA常数值的样本系统的计算中的椭偏测量值BETA值,测量噪声和误差等都是可忽略的。 本发明允许从椭圆偏振仪系统获得精确和精确的样本系统PSI和DELTA值,其中偏振光束定向在除了布鲁斯特发生角度的主体之外的样本系统,允许以其它方式确定范围的DELTA值 不是不可能的,允许确定偏振光束的“携带”,并且提供用于确定所有斯托克斯矢量和米勒矩阵分量值的装置。 本发明还提供了用于使得添加到常规椭偏仪系统的所有系统部件基本上使终端用户在需要时不透明的装置,而不从所述椭偏仪系统中移除。
    • 59. 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。
    • 60. 发明授权
    • Multiple tipped berek plate optical retarder elements for use in
spectroscopic ellipsometer and polarimeter systems
    • 用于光谱椭圆光度计和偏光计系统的多个倾斜的人造革板光学延迟器元件
    • US06118537A
    • 2000-09-12
    • US223822
    • 1999-01-04
    • Blaine D. JohsCraig M. HerzingerSteven E. Green
    • Blaine D. JohsCraig M. HerzingerSteven E. Green
    • G01J3/28G02B5/30G01N21/21
    • G02B5/3083G01J2003/2866
    • Disclosed are retarder systems, for entering retardation between orthogonal components of an electromagnetic beam of radiation, having first and second Berek-type retarders which each present with first and second essentially parallel sides. The first and second Berek-type retarders are oriented, as viewed in side elevation, with first and second sides of one Berek-type retarder being oriented other than parallel to first and second sides of the other Berek-type retarder. During use in a spectroscopic ellipsometer/polarimeter system, a beam of electromagnetic radiation exits in a propagation direction which is essentially undeviated and undisplaced from the direction of an incident beam of electromagnetic radiation, even when the retarder system is caused to rotate about the locus of the beam of electromagnetic radiation. A system with similarly oriented third and fourth Berek-type retarders, sequentially placed after the first and second Berek-type retarders, is also disclosed.
    • 公开了用于在电磁辐射束的正交部件之间输入延迟的延迟器系统,其具有第一和第二Berek型延迟器,每个Berek型延迟器具有第一和第二基本平行的侧面。 第一和第二Berek型延迟器从侧视图中被定向,其中一个Berek型延迟器的第一和第二侧面定向成不同于另一Berek型延迟器的第一和第二侧。 在光谱椭偏仪/偏振计系统中使用时,电磁辐射束在传播方向上离开,即使当延迟器系统绕电磁辐射的轨迹旋转 电磁辐射束。 还公开了具有相似方向的第三和第四Berek型延迟器的系统,其顺序地放置在第一和第二Berek型延迟器之后。