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    一种新的像素化缺陷补偿方法增强了对先进半导体节点的极紫外线 (EUV) 光刻. 这种高效的方法提高了0.55 NA系统的精度和速度,确保了面具的制造能力.

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    科学领域:

    • 半导体制造业 半导体制造业
    • 先进的石版技术 精密的石版技术
    • 纳米技术纳米技术

    背景情况:

    • 极端紫外线 (EUV) 石版对于制造7nm和较小节点的半导体设备至关重要.
    • 在EUV光刻中,数值孔径 (NA) 从0.33增加到0.55,提高了分辨率,但加剧了面具多层缺陷的挑战.
    • 由于复杂的算法和模拟,0.33 NA EUV光刻的现有缺陷补偿方法是低效的,精度有限的.

    研究的目的:

    • 为EUV光刻面具多层缺陷提出一种新的,高效的缺陷补偿方法.
    • 解决当前方法在准确性和效率方面的局限性,特别是对于先进的0.55 NA系统.
    • 确保面具的可制造性,同时实现卓越的缺陷补偿性能.

    主要方法:

    • 引入了一个像素化的吸收层校正方法.
    • 该技术利用局部光强度感知和边缘形状的形态优化来补偿缺陷.
    • 拟议的方法旨在通过有限数量的评估实现卓越的性能.

    主要成果:

    • 与现有技术相比,拟议的方法显示出更高的收速度和补偿精度.
    • 对于0.33 NA和0.55 NA EUV光刻,可以在各种缺陷大小,位置和图案类型中实现有效的缺陷补偿.
    • 该方法保持了面具的可制造性,与曲线面具日益增长的实用性保持一致.

    结论:

    • 开发的像素化缺陷补偿方法为EUV光刻提供了技术上可行的和高效的解决方案.
    • 预计这种方法将大大有利于高级半导体节点的批量制造应用.
    • 该方法在不同条件下的稳定性使其适合于下一代光刻挑战.