升高还是下降? 找到最佳的门架构,以提高石墨烯晶体管的静态性能
Tzu-Jung Huang1,2, Andrew Spencer3, Luke Ingraham1
1Department of Microsystems Engineering, Rochester Institute of Technology USA ivan.puchades@rit.edu.
Nanoscale advances
|March 2, 2026
概括
沉门架构显著提高了石墨烯场效应晶体管 (GFET) 的性能和产量. 这一进步解决了石墨烯晶体管制造的关键挑战,为低功耗模拟应用铺平了道路.
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:
- CMOS技术正在接近其扩展极限,推动人们寻找替代材料,例如用于先进晶体管的石墨烯.
- 石墨烯场效应晶体管 (GFET) 提供高载体流动性和原子薄型,有望实现高性能模拟应用.
- 包括设备变化,高接触电阻,薄弱介电界面和不均的石墨烯质量在内的挑战阻碍了GFET的采用.
研究的目的:
- 直接比较两个网关堆架构 (升高 vs 缩埋藏本地网关) 对 GFET 性能和设备对设备变化的影响.
- 用六角化 (hBN) 作为门介电体来评估GFET.
- 确定有利的工艺条件,以提高基于石墨烯的晶体管的可制造性.
主要方法:
- 一个受控的,并排的过程分裂被用来制造和比较升高的与陷的埋藏的局部门GFET结构.
- 为了进行统计学上有意义的比较,对每个架构的256个相同设备进行了电气测试和表征.
- 进行了物理分析,包括光谱和歇斯底里测量,以了解潜在的改进.
主要成果:
- 入式门架构将迪拉克电压从1.2V降低到0.7V,提高了适用于低功耗模拟应用的适用性.
- 平均孔的移动性从3383 cm2V-1s-1增加到4794 cm2V-1s-1与深陷的架构.
- 设备收益率从54.4%提高到65.1%,这是由于平面化的门架构和减少的接口缺陷.
结论:
- 与升高架构相比,深陷埋藏的局部门架构在GFET性能和产量方面提供了显著的统计优势.
- 这项研究表明,对工艺条件的直接统计比较对于优化GFET可制造性至关重要.
- 这些发现突出了优化GFET的潜力,用于下一代低功耗模拟电子产品.
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