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Rule-based approach to e-beam and process-induced proximity effect correction for phase-shifting mask fabrication

机译:基于规则的电子束和工艺引起的相移掩模制造的邻近效应校正方法

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Abstract: A rule-based compensation for mask feature dimensionsis proposed. This technique is based on thepost-process measurement of select patternconfigurations. These include isolated lines, isolatedspaces, and lines and spaces ranging from 5 $mu@m tobelow 0.5 $mu@m on a test vehicle mask. The differencebetween the coded size and the measured size is thenplotted as a function of the target dimension. Usingthese data in conjunction with some choice `2D'-typepatterns, a size correction is made for each distinctfeature based upon the feature dimensions and itsdistance to the nearest neighbor. Given an effectiverule representation, pattern corrections can be viablyimplemented on a chip scale by an automated featurecompensation CAD system. The potential causes forproximity effect in our phase-shifting mask fabricationprocess and effectiveness of the proposed correctiontechnique are also investigated. !0
机译:摘要:提出了一种基于规则的掩模特征尺寸补偿方法。该技术基于对选定模式配置的后处理测量。这些包括隔离的线,隔离的空间,以及在测试车辆面罩上的范围从5μm至低于0.5μm的线和空间。然后,根据目标尺寸绘制编码尺寸和测量尺寸之间的差异。将这些数据与某些选择的“ 2D”类型图案结合使用,可以根据特征尺寸及其与最近邻居的距离,对每个不同的特征进行尺寸校正。给定有效的规则表示,可以通过自动特征补偿CAD系统在芯片规模上可行地实施图案校正。还研究了在我们的相移掩模制造过程中产生邻近效应的潜在原因以及所提出的校正技术的有效性。 !0

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