概括
化 (CaF2) 光学元件在深紫外线 (DUV) 光刻中由于同时的热和光化学效应而降解. 加速测试显示,这些综合影响显著影响元件损坏和系统可靠性.
科学领域:
- 材料科学 材料科学 材料科学
- 光学工程是指光学工程.
- 半导体制造业 半导体制造业
背景情况:
- 化 (CaF2) 的光学元件在深紫外线 (DUV) 光刻系统中至关重要.
- 这些组件的性能下降直接影响了DUV光刻系统的可靠性.
- 了解辐射损伤机制对于加速寿命研究至关重要.
研究的目的:
- 研究光热和光化学效应对CaF2光学元件损伤的联合加速影响.
- 为了对比不同DUV激光照射场景下的损伤演变.
- 阐明热和光化学效应在组件降解上的相互作用.
主要方法:
- 在不同的DUV激光照射条件下对损伤演变的比较分析.
- 吸收光谱和X射线衍射 (XRD) 的表征.
- 评估紫外线吸收率,表面粗度 (RMS) 和缺陷生成.
主要成果:
- 光化学效应,包括M中心生成和拉力格子应变,主导了初始照射阶段.
- 与实时照射相比,加速照射使紫外线吸收率大约增加了10^4.
- 污染使RMS粗度增加了10-10^2倍,平均紫外线吸收率增加了19.93%.
结论:
- 光化学效应是DUV辐射CaF2光学初始损伤的主要驱动因素.
- 热效应显著影响光化学过程,缺陷产生,内部应力和表面污染率.
- 结合光热和光化学效应加快了降解,影响了DUV光刻系统的可靠性.
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