氧化Cu和Cu-Ag薄膜的地形,热和化学表征
Maria C Carrupt1, Ana M Ferraria2, Ana P Serro3
1CEMMPRE, Department of Mechanical Engineering, University of Coimbra, 3030-788 Coimbra, Portugal.
Materials (Basel, Switzerland)
|October 16, 2025
概括
银剂增强了铜薄膜的热稳定性,提高了它们在微电子应用中的性能. 研究了纯铜薄膜和银铜薄膜的自然老化和热处理对热性能的影响.
科学领域:
- 材料科学 材料科学 材料科学
- 表面科学是一门学科.
- 薄膜技术 薄膜技术
背景情况:
- 在铜 (Cu) 中添加银 (Ag) 可以改进微观结构并增强散装材料的机械性能.
- 银的固有抗氧化能力使其成为改善铜稳定性的合适配剂.
- 铜薄膜在微电子学中至关重要,但由于老化和氧化,它们的性能可能会降低.
研究的目的:
- 为了研究银的兴奋剂,自然老化和热氧化对铜薄膜性能的影响.
- 分析表面化学,形态和热性能的变化.
- 确定银铜在微电子应用中增强热稳定性的潜力.
主要方法:
- 使用射频磁喷射,沉积纯铜和银铜 (Cu_2Ag,Cu_4Ag) 薄膜.
- 作为沉积,自然老化 (1年) 和热处理 (200°C在空气中) 膜的表征.
- 使用X射线光电子光谱 (XPS),原子力显微镜 (AFM) 和热分析 (导电性,扩散性,容量) 的分析.
主要成果:
- 在老化和回火后,XPS揭示了铜和银氧化状态的变化.
- AFM显示,银的加入和热处理改变了表面粗度和形态.
- 热导率随着银度的降低而增加;老化和回火效应随着银含量而变化.
- 在自然老化后,Cu_4Ag薄膜表现出优越的热稳定性.
结论:
- 控制的银注可以显著提高铜薄膜的热稳定性.
- 银剂提供了一种有前途的策略,以减轻由于老化和氧化而导致的铜薄膜的降解.
- 这些发现与提高微电子中基于铜的元件的可靠性有关.
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