单次事件扰动研究22纳米完全耗尽的在绝缘体上的静态随机访问存储器,具有电荷共享效应
Chenyu Yin1, Tianzhi Gao1, Hao Wei1
1Key Laboratory for Wide Band Gap Semiconductor Materials and Devices of Education Ministry, School of Microelectronics, Xidian University, Xi'an 710071, China.
Micromachines
|August 26, 2023
概括
在6T-SRAM中,单一事件效应在22nm的FDSOI过程中被模拟. 电荷共享和双极放大加剧了这些影响,降低了颠覆值和临界电荷,较小的粒子造成了更大的影响.
科学领域:
- 半导体设备物理学 半导体设备物理
- 微电子的可靠性 微电子的可靠性
- 电子产品中的辐射效应.
背景情况:
- 六晶体管静态随机访问存储器 (6T-SRAM) 对于现代电子产品至关重要.
- 了解单一事件效应 (SEE) 对于确保设备可靠性至关重要,特别是在先进的半导体工艺中.
- 完全耗尽的在绝缘体 (FDSOI) 技术提供了优势,但需要对辐射诱导的漏洞进行彻底分析.
研究的目的:
- 通过电路和设备层面的模拟来研究6T-SRAM上的单次事件效应 (SEE).
- 量化电荷共享和双极放大对SRAM颠覆的影响.
- 分析发生粒子特征对SEE的影响.
主要方法:
- 对6T-SRAM进行了电路级和设备级的模拟.
- 使用了22纳米完全耗尽的在绝缘体 (FDSOI) 工艺技术.
- 设备层面的模拟包括电荷共享和双极放大效应.
主要成果:
- 电荷共享和双极放大的联合效应显著降低了电路的颠覆值15.4%,临界电荷降低了23.5%.
- 负载共享被认为是加剧SRAM电路中单一事件效应的关键因素.
- 模拟显示,事件半径较小的粒子具有更有害的影响,增加单一事件扰乱的可能性.
结论:
- 负荷共享和双极放大严重降低了6T-SRAM在FDSOI上的辐射耐受性.
- 撞击粒子的半径和由此产生的电离分布在电荷收集和SEE的严重性方面发挥着重要作用.
- 结合这些效应的先进模拟对于预测和减轻纳米级SRAM中辐射诱导的故障至关重要.
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