在高电离辐射下使用Pb(ZryTi1-y) O3的NC-FinFET的设计和分析
Suman Lata Tripathi1, Neeraj Nayan Prakash2, Ashutosh Kumar Yadav2
1Department of E & TC, Symbiosis Institute of Technology (SIT), Symbiosis International (Deemed University), Pune, India. tri.suman78@gmail.com.
Scientific reports
|September 29, 2025
概括
负电容 FinFETs (NC-FinFETs) 通过用 PZT 铁电层取代 SiO2 来显示增强的辐射硬度. 这种基于PZT的NC-FinFET提供了卓越的电荷补偿,减轻了可靠电子产品的辐射诱导退化.
科学领域:
- 固态物理 固态物理
- 半导体设备物理 半导体设备物理
- 材料科学 材料科学 材料科学
背景情况:
- 在电离辐射下,由于接口陷电荷增加,晶体管的性能降低.
- 传统的二氧化 (SiO2) 门介电材料容易受到辐射引起的缺陷.
- 开发辐射硬化半导体设备对于太空和国防应用至关重要.
研究的目的:
- 为了研究总电离剂量 (TID) 对负电容 FinFET (NC-FinFET) 的影响.
- 为了评估取代SiO2门氧化物以硫酸 (Pb(Zr_yTi_{1-y}) O3 - PZT) 铁电层的有效性.
- 评估辐射诱导的陷密度及其对设备稳定性和性能的影响.
主要方法:
- 使用先进的3D技术计算机辅助设计 (TCAD) CRad工具进行模拟.
- 对辐射诱导的陷密度的分析 (Vog+, VodH+).
- 在TID下,NC-FinFET与PZT与传统的基于SiO2和HfO2的FinFET进行比较.
主要成果:
- 基于PZT的NC-FinFET显示显著增强了电荷补偿能力,减轻了泄漏电流.
- 在TID之后,NC-FinFET表现出微不足道的门电压 (Vth) 转移 (0.0056%),优异的离子/离子比率 (~10^10) 和改进的下门波动 (SS) (39.9 mV/dec).
- 与基于SiO2 (~10^6 离子/Ioff, 50.4 mV/dec SS) 和HfO2 (~10^7 离子/Ioff, 38.2 mV/dec SS) 的设备相比,PZT NC-FinFET显示出更高的辐射耐受性.
结论:
- 在NC-FinFET中用PZT取代SiO2显著提高了对总电离剂量的辐射硬度.
- PZT层有效地补偿辐射诱导的电荷,改善设备的稳定性和性能指标.
- 拟议的NC-FinFET是对太空和国防电子的关键应用的有希望的辐射强化解决方案.
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