通过 TCAD 仿真全面研究总电离剂量对体式 FinFET 的影响

IF 1.6 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Yanfei Gong , Xingtong Chen , Qiang Zhao , Zhensong Li , Yueqin Li , Jieqing Fan , Jianhong Hao , Fang Zhang , Zhiwei Dong
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引用次数: 0

摘要

本研究调查了导通状态辐照偏置下总电离剂量(TID)对体鳍式场效应晶体管的影响,旨在分析辐照增强效应的原因和物理机制。利用技术计算机辅助设计 (TCAD),我们首次发现位于浅沟槽隔离(STI)氧化物顶点的寄生晶体管对器件的亚阈值劣化有显著作用,导致离态漏电流明显增加。此外,在相同的辐照偏置条件下,窄鳍片和短沟道器件的关态漏电流增加更为明显。这种增加分别归因于 STI 氧化物中捕获的电荷量增加和冲穿停止层(PTS)静电电位升高。此外,较高的漏极电压会降低 STI 寄生晶体管的阈值电压,从而导致漏极电压升高时的关态电流增大。总之,研究导通偏压下体式 FinFET 的 TID 效应至关重要,因为它可以为强化纳米结构器件防止辐照引起的降解提供理论支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A comprehensive investigation of total ionizing dose effects on bulk FinFETs through TCAD simulation
This study investigates the total-ionizing-dose (TID) effect on bulk FinFETs under ON-state irradiation bias, aiming to analyze the cause and physical mechanism of irradiation enhancement effects. Utilizing technology computer-aided design (TCAD), for the first time, we find that parasitic transistors located at the apex of the shallow trench isolation (STI) oxide significantly contribute to the subthreshold degradation of the device, leading to a notable increase in off-state leakage current. Furthermore, under identical irradiation bias conditions, narrower-fin and shorter-channel devices exhibit a more pronounced increase in off-state leakage current. This escalation is attributed to an increased amount of trapped charge in the STI oxide and the elevated electrostatic potential of the punch-through stop (PTS) layer, respectively. Additionally, higher drain voltage reduces the threshold voltage of the STI parasitic transistors, resulting in an increased off-state current as drain voltage rises. In summary, investigating the TID effect of bulk FinFETs under ON-bias is crucial, as it can provide theoretical support for reinforcing nanostructured devices against irradiation-induced degradation.
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来源期刊
Microelectronics Reliability
Microelectronics Reliability 工程技术-工程:电子与电气
CiteScore
3.30
自引率
12.50%
发文量
342
审稿时长
68 days
期刊介绍: Microelectronics Reliability, is dedicated to disseminating the latest research results and related information on the reliability of microelectronic devices, circuits and systems, from materials, process and manufacturing, to design, testing and operation. The coverage of the journal includes the following topics: measurement, understanding and analysis; evaluation and prediction; modelling and simulation; methodologies and mitigation. Papers which combine reliability with other important areas of microelectronics engineering, such as design, fabrication, integration, testing, and field operation will also be welcome, and practical papers reporting case studies in the field and specific application domains are particularly encouraged. Most accepted papers will be published as Research Papers, describing significant advances and completed work. Papers reviewing important developing topics of general interest may be accepted for publication as Review Papers. Urgent communications of a more preliminary nature and short reports on completed practical work of current interest may be considered for publication as Research Notes. All contributions are subject to peer review by leading experts in the field.
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