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    • 32. 发明授权
    • Structured illumination for contrast enhancement in overlay metrology
    • 结构化照明,用于对比度增强的重叠度量
    • US09104120B2
    • 2015-08-11
    • US13394064
    • 2012-02-08
    • Joel SeligsonNoam SapiensDaniel Kandel
    • Joel SeligsonNoam SapiensDaniel Kandel
    • G01B11/14G03F7/20G01B11/02G01N21/00
    • G01N21/47G01B11/02G01N21/00G03F7/70633
    • Contrast enhancement in a metrology tool may include generating a beam of illumination, directing a portion of the generated beam onto a surface of a spatial light modulator (SLM), directing at least a portion of the generated beam incident on the surface of the SLM through an aperture of an aperture stop and onto one or more target structures of one or more samples, and generating a selected illumination pupil function of the illumination transmitted through the aperture utilizing the SLM in order to establish a contrast level of one or more field images of the one or more target structures above a selected contrast threshold, and performing one or more metrology measurements on the one or more target structures utilizing the selected illumination pupil function.
    • 计量工具中的对比度增强可以包括产生照射光束,将所产生的光束的一部分引导到空间光调制器(SLM)的表面上,引导入射到SLM的表面上的所产生的光束的至少一部分通过 孔径的孔径停止并且连接到一个或多个样本的一个或多个目标结构上,并且利用SLM生成通过孔径透射的照明的选择的照明光瞳函数,以便建立一个或多个场图像的对比度 所述一个或多个目标结构在所选择的对比度阈值之上,以及利用所选择的照明光瞳功能对所述一个或多个目标结构执行一个或多个度量测量。
    • 35. 发明申请
    • STRUCTURED ILLUMINATION FOR CONTRAST ENHANCEMENT IN OVERLAY METROLOGY
    • 结构化照明在超大规模的对比度增强
    • US20120206729A1
    • 2012-08-16
    • US13394064
    • 2012-02-08
    • Joel SeligsonNoam SapiensDaniel Kandel
    • Joel SeligsonNoam SapiensDaniel Kandel
    • G01N21/47
    • G01N21/47G01B11/02G01N21/00G03F7/70633
    • Contrast enhancement in a metrology tool may include generating a beam of illumination, directing a portion of the generated beam onto a surface of a spatial light modulator (SLM), directing at least a portion of the generated beam incident on the surface of the SLM through an aperture of an aperture stop and onto one or more target structures of one or more samples, and generating a selected illumination pupil function of the illumination transmitted through the aperture utilizing the SLM in order to establish a contrast level of one or more field images of the one or more target structures above a selected contrast threshold, and performing one or more metrology measurements on the one or more target structures utilizing the selected illumination pupil function.
    • 计量工具中的对比度增强可以包括产生照射光束,将所产生的光束的一部分引导到空间光调制器(SLM)的表面上,引导入射到SLM的表面上的所产生的光束的至少一部分通过 孔径的孔径停止并且连接到一个或多个样本的一个或多个目标结构上,并且利用SLM生成通过孔径透射的照明的选择的照明光瞳函数,以便建立一个或多个场图像的对比度 所述一个或多个目标结构在所选择的对比度阈值之上,以及利用所选择的照明光瞳功能对所述一个或多个目标结构执行一个或多个度量测量。
    • 37. 发明申请
    • MULTI-LAYER OVERLAY METROLOGY TARGET AND COMPLIMENTARY OVERLAY METROLOGY MEASUREMENT SYSTEMS
    • 多层叠加计量目标和综合覆盖度量度测量系统
    • US20120033215A1
    • 2012-02-09
    • US13186144
    • 2011-07-19
    • Daniel KandelVladimir LevinskiGuy Cohen
    • Daniel KandelVladimir LevinskiGuy Cohen
    • G01B11/06G01J4/00
    • G03F7/70633G03F7/70683
    • A multi-layer overlay target for use in imaging based metrology is disclosed. The overlay target includes a plurality of target structures including three or more target structures, each target structure including a set of two or more pattern elements, wherein the target structures are configured to share a common center of symmetry upon alignment of the target structures, each target structure being invariant to N degree rotation about the common center of symmetry, wherein N is equal to or greater than 180 degrees, wherein each of the two or more pattern elements has an individual center of symmetry, wherein each of the two or more pattern elements of each target structure is invariant to M degree rotation about the individual center of symmetry, wherein M is equal to or greater than 180 degrees.
    • 公开了一种用于基于成像的计量学的多层覆盖目标。 覆盖目标包括包括三个或更多个目标结构的多个目标结构,每个目标结构包括一组两个或多个模式元素,其中目标结构被配置为在目标结构对准时共享公共对称中心,每个目标结构 目标结构相对于公共对称中心不变为N度旋转,其中N等于或大于180度,其中两个或更多个图案元素中的每一个具有单独的对称中心,其中两个或更多个图案 每个目标结构的元素对于单个对称中心的M度旋转是不变的,其中M等于或大于180度。
    • 40. 发明申请
    • OPTICAL GAIN APPROACH FOR ENHANCEMENT OF OVERLAY AND ALIGNMENT SYSTEMS PERFORMANCE
    • 增强覆盖和对准系统性能的光学增益方法
    • US20080266561A1
    • 2008-10-30
    • US12108364
    • 2008-04-23
    • Daniel KandelVladimir LevinskiMichael AdelJoel Seligson
    • Daniel KandelVladimir LevinskiMichael AdelJoel Seligson
    • G01B11/14
    • G01B11/272G03F7/70633
    • A resultant image of a grating target may be obtained by dividing an image of the target into first and second portions and optically modifying the first and/or second portion such that a final image formed from their combination is characterized by a Moiré pattern. The resultant image may be analyzed to determine a shift in the grating target from a shift in the Moiré pattern. Optical alignment apparatus may include a first beam splitter, an image transformation element optically coupled to the first beam splitter, and a second beam splitter. The first beam splitter divides an image of a grating target into first and second portions. The second beam splitter combines the first portion and the second portion. The image transformation element optically modifies the first and/or second portion such that a final image formed from their combination is characterized by a Moiré pattern.
    • 可以通过将目标图像划分成第一和第二部分并光学地修改第一和/或第二部分使得由其组合形成的最终图像由莫尔图案表征来获得光栅目标的合成图像。 可以分析所得到的图像以确定光栅目标从莫尔图案的偏移中的偏移。 光学对准装置可以包括第一分束器,光耦合到第一分束器的图像变换元件和第二分束器。 第一分束器将光栅靶的图像分成第一和第二部分。 第二分束器组合第一部分和第二部分。 图像变换元件光学地修改第一和/或第二部分,使得由它们的组合形成的最终图像的特征在于莫尔图案。