概括
研究人员开发了一种新的照明器,使用富里埃合成来检查极紫外线 (EUV) 面具. 这项技术可以灵活控制照明的一致性,提高成像分辨率和对比度,用于先进的EUV显微镜.
科学领域:
- 光学工程是指光学工程.
- 计量学 计量学 计量学
- 显微镜的使用方法
背景情况:
- 检查极紫外线 (EUV) 面具需要精确控制照明的一致性.
- 现有的一致性控制方法的灵活性和功率可能受到限制.
- 里埃合成技术为可编程照明提供了一种新的方法.
研究的目的:
- 提出和验证基于富里埃合成的EUV面具检查的替代照明器.
- 为了证明灵活控制照明连贯性和瞳孔填充模式.
- 在实验室显微镜成像平台中评估照明器的性能.
主要方法:
- 开发了一种基于可见激光的微观成像平台,采用富里埃合成照明器.
- 编程的事件光束扫描通过弗雷内尔带板控制连贯性.
- 实验评估空间分辨率和图像对比度使用磁盘和双极瞳孔填充模式.
主要成果:
- 照明器成功实现了可编程的瞳孔填充模式和连贯性控制.
- 空间分辨率和对比度的实验结果与理论预测 (雷利标准,对比转移函数) 非常相匹配.
- 验证了拟议的照明器对高分辨率成像的有效性.
结论:
- 富里埃合成照明器为EUV口罩检查提供了强大而灵活的解决方案.
- 开发的基于激光的平台验证了照明器的性能.
- 这项技术有望改善EUV口罩检查系统和未来的EUV显微镜应用.
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