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SiGe HBT60Coγ射线辐照效应及退火特性
Total Dose Gamma Irradiation Effects and Annealing Characteristics of a SiGe HBT
【摘要】 研究了国产SiGe异质结双极晶体管(HBT)60Coγ射线100Gy(Si)~10kGy(Si)总剂量辐照后的辐照效应及辐照后的退火特性.测试了辐照及退火后的直流电参数.实验结果显示,辐照后基极电流(Ib)明显增大,而集电极电流(Ic)基本不变,表明Ib的增加是电流增益退化的主要原因.退火结果表现为电流增益(β=Ic/Ib)继续衰降,表明SiGeHBT具有“后损伤”效应.对其机理进行了探讨,结果表明其主要原因是室温退火中界面态继续增长引起的.
【Abstract】 The total-dose radiation effects and annealing characteristics of a SiGe HBT are studied.It is found that the degradation of the current gain is dominated by the increase of I_b.The mechanisms behind the post-damage effects of total-dose radiation are discussed.The chief factor that causes post-damage effects is the increase in the interface states.
【关键词】 SiGe异质结双极晶体管;
电离辐射;
退火;
后损伤效应;
【Key words】 SiGe HBT; ionizing radiation; annealing; post-damage effect;
【Key words】 SiGe HBT; ionizing radiation; annealing; post-damage effect;
- 【文献出处】 半导体学报 ,Chinese Journal of Semiconductors , 编辑部邮箱 ,2006年09期
- 【分类号】TN323.4
- 【被引频次】10
- 【下载频次】141