一个晶圆预调整算法,基于权重的富里埃数列圆形和最小正方形的圆形和最小正方形的圆形
Jingsong Chen1,2,3,4, Zhou Lan1,2,3,4, Cheng Xue1,2,3,4
1National Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, China.
一种新的加权里埃序列圆圈配合 (WFC) 方法提高了晶圆预对齐的精度和效率. 这种先进的技术提供了优越的稳定性和准确性,相比传统的最小正方形安装方法.
科学领域:
- 半导体制造业 半导体制造业
- 光学工程是指光学工程.
- 计量学 计量学 计量学
背景情况:
- 晶圆预对齐在光刻中至关重要,用于精确的中心和隙方向校正.
- 现有的方法,如最小方程拟合 (LSC),可能对异常值敏感,可能缺乏最佳效率.
研究的目的:
- 引入和评估一种新的加权里埃序列圆圈 (WFC) 方法,以改进晶圆预对齐.
- 为了提高晶圆中心和方向校准的精度,稳定性和效率.
主要方法:
- 为圆心和方向校准开发加权里埃数列圆圈 (WFC) 方法.
- 将WFC与最小正方形拟合圆 (LSC) 方法进行比较,包括分析Fourier序列拟合圆 (FC) 方法作为WFC的特殊情况.
- 基于模拟的预对齐精度和计算时间的评估.
主要成果:
- 与LSC相比,WFC方法表现出卓越的稳定性和异常抑制,用于圆心适配.
- FC方法是WFC的一种变体,提供了28%的装配效率比LSC提高,具有相当的中心装配精度.
- 无论是WFC和FC方法,在半径适配精度方面都优于LSC.
- 模拟结果显示绝对位置精度为±2μm,绝对方向精度为0.01°,总计算时间小于3.3秒.
结论:
- 拟议的WFC方法显著提高了晶圆预对齐的准确性和在石版画中的效率.
- WFC为LSC提供了强大而稳定的替代方案,特别是在数据异常值存在时.
- 该方法的高精度和速度使其适用于先进的半导体制造工艺.
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