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紧张技术:通过尖端增强的拉曼光谱技术进行非破坏性高横向分辨率特性鉴定
Giancarlo La Penna1, Chiara Mancini1, Anacleto Proietti1
1Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Rome, Italy.
Applied spectroscopy
|April 17, 2024
概括
尖端增强拉曼光谱 (TERS) 等先进的光谱技术为半导体制造提供了非破坏性,高分辨率的表征. TERS克服了传统方法的局限性,使先进材料能够精确的纳米级应变控制.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 频谱学是一种光谱学.
背景情况:
- 半导体行业面临的挑战是,金属氧化物半导体场效应晶体管在10nm以下的小型化.
- 应力技术通过诱导晶格子的应力来提高设备性能.
- 在半导体制造中需要更快,非破坏性的在线表征技术.
研究的目的:
- 探索用于半导体质量控制和故障分析的先进光谱技术.
- 研究μ-拉曼光谱法和尖端增强的拉曼光谱法 (TERS) 进行纳米尺度表征.
- 展示TERS在分析先进半导体材料的应变和组成方面的能力.
主要方法:
- 利用μ-拉曼光谱来评估应变值和应变层中的分布.
- 采用尖端增强拉曼光谱法 (TERS),将原子力显微镜与拉曼光谱法结合起来.
- 分析了拉曼峰位在应力和不应力层中的位置变化,用于化学组成和应力估计.
主要成果:
- 微拉曼光谱提供了应变洞察力,但受到阿贝衍射极限的限制.
- TERS超越了衍射极限,为纳米分析提供了高侧面分辨率.
- TERS有效地描述了在绝缘体上的Si0.7Ge0.3表轴层,证实了纳米级的应变控制.
结论:
- TERS是一种强大的,非破坏性的技术,用于先进的半导体表征.
- TERS使得纳米级精确的应变控制和化学成分分析成为可能.
- 该研究证明了TERS在半导体制造中的质量控制方面的有效性和高侧面分辨率.
相关概念视频
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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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