高能金属沉积对超薄氧化物半导体的电子影响
Yi-Yu Pan1, Min-Ju Kuo1,2, Shih-Chieh Chen1
1Institute of Electronics, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan.
Nano letters
|January 21, 2025
概括
高能金属沉积导致氧化物 (In2O3) 晶体管局部加热,改变其电子性能. 这种热效应,特别是在短通道中,可以通过调整制造方法来减轻.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 半导体物理 半导体物理
背景情况:
- 高能金属沉积对于制造纳米设备至关重要.
- 沉积对2D半导体等敏感材料的热影响尚未完全理解.
- 原子薄的氧化 (In2O3) 是下一代电子产品的一个有前途的材料.
研究的目的:
- 为了研究因高能金属沉积引起的In2O3中局部火效应.
- 了解这种热效应如何影响In2O3晶体管的电子性能,特别是关于通道长度.
- 确定在制造过程中减轻有害热效应的策略.
主要方法:
- 在原子薄的In2O3薄膜上利用高能金属沉积.
- 采用导电原子力显微镜 (C-AFM) 来绘制导电度梯度.
- 制造和表征了具有不同通道长度 (Lch) 的 In2O3 晶体管.
- 研究了金属潜热和沉积序列的影响.
主要成果:
- 在金属沉积过程中局部加热会在In2O3设备中产生导电度梯度,在金属接触点附近的导电率更高.
- 这种热梯度会在更短的通道设备中引发显著的门电压 (Vth) 转移,模仿短通道效应.
- 具有较高潜热度的金属会放大这些热诱导的性能转变.
- 反向沉积顺序和沉积后的氧气回火有效地抑制了Vth转移.
结论:
- 高能金属沉积引入了显著的热效应,影响了In2O3晶体管的性能,特别是在短通道中.
- 这些热效应可以通过战略性制造调整来控制,例如沉积序列和回火.
- 了解和管理局部加热对于优化2D半导体纳米设备的可靠性和性能至关重要.
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