在半导体二维过渡金属二甲基化物上金属接触的创新,朝着先进的3D结构场效应晶体管的方向发展
Byeongchan Kim1, Seojoo Lee1, Jin-Hong Park1,2
1Department of Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Korea. jhpark9@skku.edu.
Nanoscale horizons
|July 8, 2024
概括
二维 (2D) 半导体为先进的晶体管提供了前景,但2D材料和金属之间的高接触电阻仍然是它们在门周围场效应晶体管 (GAAFET) 中应用的重大挑战. 本综述详细介绍了二维半导体设备的问题和解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
- 纳米电子技术纳米电子技术
背景情况:
- 作为下一代通道材料,二维 (2D) 半导体,如过渡金属二甲基化物 (TMD),正在被探索为先进的3D场效应晶体管 (FET),如门式全方位晶体管 (GAAFET) 和互补晶体管 (C-FET).
- 它们的原子薄度,适度的电荷载体移动性和短的通道长度使它们对设备扩展具有吸引力.
- 阻碍它们集成的一个主要障碍是二维半导体和金属电极之间的接口上的大量接触电阻.
研究的目的:
- 本综述全面探讨了基于2D半导体的设备中高接触电阻的关键问题.
- 它旨在阐明这种抗性的物理起源,并调查目前减轻它的策略.
- 焦点是与GAAFET结构的发展相关的含义和解决方案.
主要方法:
- 文献综述和对二维半导体接触电阻现有研究的综合.
- 分析导致2D材料-金属接口高接触电阻的物理机制.
- 分类和评估各种实验和理论方法来降低接触电阻.
主要成果:
- 2D半导体的高接触阻力源于包括费米水平固定,肖特基屏障形成和接口缺陷在内的因素.
- 各种方法,如金属的工作功能工程,表面处理和插入接口层,在降低接触阻力方面表现出有希望.
- 评估特定技术的有效性和与GAAFET制造工艺的兼容性.
结论:
- 解决高接触电阻对于实现2D半导体在先进晶体管技术中的全部潜力至关重要.
- 成功的缓解策略对于在GAAFET和其他缩放式电子设备中实际实施2D材料至关重要.
- 对新型接触方案和接口工程的持续研究对于未来的纳米电子应用是必不可少的.
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