通过对高K介电绝缘体进行阴离子兴奋剂来稳定哈夫尼氧化中四角形相
Jae Young Kim1, Sung Hyuk Park1, Yeong Jae Kim1
1Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea.
ACS applied materials & interfaces
|October 24, 2024
概括
开发先进的高k介电绝缘体对于现代电子产品至关重要. 这项研究用兴奋剂增强了氧化 (HZO) 薄膜,达到电介常数为40.9,并为下一代半导体设备提供了更好的绝缘.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 纳米技术 纳米技术
背景情况:
- 加强电子电路集成需要具有优质绝缘和高介电常数的介电绝缘器.
- 传统的高k介电绝缘体在满足先进的半导体需求方面存在局限性.
研究的目的:
- 通过兴奋剂来控制氧化 (HZO) 薄膜的相位来开发高k介电绝缘体.
- 为了研究增强化HZO薄膜中介电性能的基本机制.
- 优化异质连接结构,以提高介电性能和减少泄漏电流.
主要方法:
- 兴奋剂Hf0.5Zr0.5O2 (HZO) 薄膜与 (Y), (Ta), (Ga), (Si) 和 (Al) 控制相比.
- 使用密度函数理论 (DFT) 的计算与实验分析一起,以了解介电性质增强.
- 优化沉积后化 (PDA) 和制造Al2O3/Y:HZO异质结.
主要成果:
- 用添加的HZO (Y:HZO) 薄膜表现出高的四角形相位比率和0.9的介电常数,超过了未添加的HZO.
- 与单层薄膜相比,Al2O3/Y:HZO异质连接显示出高介电常数,泄漏电流减少.
- 结合异质连接的薄膜晶体管 (TFT) 显示了较低的下值 (SS) 值.
结论:
- 对HZO薄膜,特别是对Y的控制相位剂显著增强介电常数和绝缘性能.
- 使用Al2O3的异质连接工程进一步提高了介电性能,并减少了泄漏电流.
- 这项研究通过提供超越传统高k介电限制的解决方案,有助于推进半导体技术.
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