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    • 29. 发明授权
    • Method for correcting optical proximity effects
    • 光学邻近效应校正方法
    • US08405907B2
    • 2013-03-26
    • US13230191
    • 2011-09-12
    • Paul Graeupner
    • Paul Graeupner
    • G02B5/18
    • G03F7/70441G03F1/36G03F7/70283G03F7/70308
    • A system and associated method employ a first projection objective including at least one optical proximity correction (OPC) filter with a filter function adapted to a particular pattern. The first projection objective has at least essentially the same imaging properties as a second projection objective in the system, for the particular pattern, to which the filter function of the optical proximity correction (OPC) filter is adapted. The first projection objective differs from the second projection objective with respect to optical imaging properties for the particular pattern when the optical proximity correction (OPC) filter is not present in the first projection objective.
    • 系统和相关联的方法采用包括具有适于特定图案的滤波器功能的至少一个光学邻近校正(OPC)滤波器的第一投影物镜。 对于特定图案,第一投影物镜至少具有与系统中的第二投影物镜基本相同的成像特性,光学邻近校正(OPC)滤镜的滤镜功能适用于该特定图案。 当光学邻近校正(OPC)滤波器不存在于第一投影物镜中时,第一投影物镜与第二投影物镜相对于特定图案的光学成像特性不同。
    • 30. 发明授权
    • Method for correcting optical proximity effects
    • 光学邻近效应校正方法
    • US08027091B2
    • 2011-09-27
    • US11750547
    • 2007-05-18
    • Paul Graeupner
    • Paul Graeupner
    • G02B5/18
    • G03F7/70441G03F1/36G03F7/70283G03F7/70308
    • In a method for correcting optical proximity effects (Optical Proximity Correction, OPC) when imaging a pattern, arranged in the object surface of a projection objective, into the image surface of the projection objective with the aid of a projection objective, a multiplicity of optical elements and at least one pupil surface that is Fourier-transformed to the image surface are arranged between the object surface and the image surface. An optical filtering of the light used for the imaging is carried out with the aid of at least one OPC filter inserted between the object surface and the image surface in accordance with an OPC filter function that is adapted to the pattern and corresponds to a spatially dependent transmission filtering in the region of the pupil surface of the imaging system. The profile of the pupil transmission function is adapted with the aid of the OPC filter to the pattern, characterized by the position of diffraction orders, of the mask such that there is respectively present for all the diffraction orders contributing to the imaging an optimized pupil transmission which leads to a minimization of line width variations, dependent on line density, in the image surface.
    • 在利用投影物镜将配置在投影物镜的物体表面上的图案成像的图案中的光学邻近效应(Optical Proximity Correction,OPC)的校正方法中,多个光学 元件和被傅里叶变换到图像表面的至少一个瞳孔表面被布置在物体表面和图像表面之间。 借助于至少一个插入在物体表面和图像表面之间的OPC滤光器,根据适合该图案的OPC滤光片功能,对用于成像的光进行光学滤光,并对应于空间上依赖的 在成像系统的瞳孔表面的区域中进行透射滤波。 瞳孔传递函数的轮廓通过OPC滤波器适应于掩模的衍射级的位置,其特征在于分别存在有助于成像的所有衍射级,优化的光瞳传输 这导致在图像表面中取决于线密度的线宽变化的最小化。