This work presents a systematic analysis of proton-induced total ionizing dose(TID)effects in 1.2 k V silicon carbide(SiC)power devices with various edge termination structures.Three edge terminations including ring-a...This work presents a systematic analysis of proton-induced total ionizing dose(TID)effects in 1.2 k V silicon carbide(SiC)power devices with various edge termination structures.Three edge terminations including ring-assisted junction termination extension(RA-JTE),multiple floating zone JTE(MFZ-JTE),and field limiting rings(FLR)were fabricated and irradiated with45 Me V protons at fluences ranging from 1×10^(12) to 1×10^(14) cm^(-2).Experimental results,supported by TCAD simulations,show that the RA-JTE structure maintained stable breakdown performance with less than 1%variation due to its effective electric field redistribution by multiple P+rings.In contrast,MFZ-JTE and FLR exhibit breakdown voltage shifts of 6.1%and 15.2%,respectively,under the highest fluence.These results demonstrate the superior radiation tolerance of the RA-JTE structure under TID conditions and provide practical design guidance for radiation-hardened Si C power devices in space and other highradiation environments.展开更多
针对消防火灾调查中金属受热痕迹物证判别仅依靠专家系统对表面色彩变化判断,效率低、准确度受限的痛点问题,开展基于光谱成像技术的复杂光照环境下手持式快检系统研究。创新性地提出搭建双光谱相机级联的手持式光谱成像系统,克服干涉...针对消防火灾调查中金属受热痕迹物证判别仅依靠专家系统对表面色彩变化判断,效率低、准确度受限的痛点问题,开展基于光谱成像技术的复杂光照环境下手持式快检系统研究。创新性地提出搭建双光谱相机级联的手持式光谱成像系统,克服干涉分光体制下自由光谱范围受限问题,实现覆盖475~975 n m宽光谱范围40通道的光谱图像获取。以Q235牌号钢板为实验样本,通过采集马弗炉中不同温度均匀受热后的样本在5种不同日光条件下的光谱图像,进行复杂光照条件下钢板受热痕迹光谱特征研究,将样本划分为5种温度范围进行智能识别方法设计。提出三点标定法克服环境光源对光谱数据干扰,光谱图像数据经清洗、三点标定预处理后,采用决策树分类思想指导的线性判别分析及误差逆向传播神经网络分类方法搭建分类器,交叉验证准确率达97.6%,相对于两独立分类器交叉验证准确率91.5%及94.2%显著提升。针对应用场景提出基于分类器的目标加权判别方法,提升异常响应应对能力,增加了系统可靠性,实现目标样本受热温度的实时、准确判断。经样本集外19种不同受热温度样本验证,识别准确率100%,为通用型、便携式可见-近红外光谱成像技术应用提供了可靠途径。展开更多
基于0.13μm GaN赝配高电子迁移率晶体管(pseudomorphic high electron mobility transistor,pHEMT)工艺,设计开发了一款Ka频段功放器件。电路结构采用4包晶体管合成、3级级联放大,功放输出端集成开关功能。经过探针测试,芯片在32 GHz~3...基于0.13μm GaN赝配高电子迁移率晶体管(pseudomorphic high electron mobility transistor,pHEMT)工艺,设计开发了一款Ka频段功放器件。电路结构采用4包晶体管合成、3级级联放大,功放输出端集成开关功能。经过探针测试,芯片在32 GHz~38 GHz频带内,饱和输出功率达到5 W,功率附加效率达到32%,接收路插损小于1 dB,芯片面积为2.6 mm×1.3 mm,可应用于开关与功放一片式集成设计。展开更多
基金supported by the IITP(Institute for Information&Communications Technology Planning&Evaluation)under the ITRC(Information Technology Research Center)support program(IITP-2025-RS-2024-00438288)grant funded by the Korea government(MSIT)+1 种基金National Research Council of Science&Technology(NST)grant by the MSIT(Aerospace Semiconductor Strategy Research Project No.GTL25051-000)supported by the IC Design Education Center(IDEC),Korea。
文摘This work presents a systematic analysis of proton-induced total ionizing dose(TID)effects in 1.2 k V silicon carbide(SiC)power devices with various edge termination structures.Three edge terminations including ring-assisted junction termination extension(RA-JTE),multiple floating zone JTE(MFZ-JTE),and field limiting rings(FLR)were fabricated and irradiated with45 Me V protons at fluences ranging from 1×10^(12) to 1×10^(14) cm^(-2).Experimental results,supported by TCAD simulations,show that the RA-JTE structure maintained stable breakdown performance with less than 1%variation due to its effective electric field redistribution by multiple P+rings.In contrast,MFZ-JTE and FLR exhibit breakdown voltage shifts of 6.1%and 15.2%,respectively,under the highest fluence.These results demonstrate the superior radiation tolerance of the RA-JTE structure under TID conditions and provide practical design guidance for radiation-hardened Si C power devices in space and other highradiation environments.
文摘针对消防火灾调查中金属受热痕迹物证判别仅依靠专家系统对表面色彩变化判断,效率低、准确度受限的痛点问题,开展基于光谱成像技术的复杂光照环境下手持式快检系统研究。创新性地提出搭建双光谱相机级联的手持式光谱成像系统,克服干涉分光体制下自由光谱范围受限问题,实现覆盖475~975 n m宽光谱范围40通道的光谱图像获取。以Q235牌号钢板为实验样本,通过采集马弗炉中不同温度均匀受热后的样本在5种不同日光条件下的光谱图像,进行复杂光照条件下钢板受热痕迹光谱特征研究,将样本划分为5种温度范围进行智能识别方法设计。提出三点标定法克服环境光源对光谱数据干扰,光谱图像数据经清洗、三点标定预处理后,采用决策树分类思想指导的线性判别分析及误差逆向传播神经网络分类方法搭建分类器,交叉验证准确率达97.6%,相对于两独立分类器交叉验证准确率91.5%及94.2%显著提升。针对应用场景提出基于分类器的目标加权判别方法,提升异常响应应对能力,增加了系统可靠性,实现目标样本受热温度的实时、准确判断。经样本集外19种不同受热温度样本验证,识别准确率100%,为通用型、便携式可见-近红外光谱成像技术应用提供了可靠途径。
