%A Sun Ya-Bin (孙亚宾), Fu Jun (付军), Xu Jun (许军), Wang Yu-Dong (王玉东), Zhou Wei (周卫), Zhang Wei (张伟), Cui Jie (崔杰), Li Gao-Qing (李高庆), Liu Zhi-Hong (刘志弘), Yu Yong-Tao (余永涛), Ma Ying-Qi (马英起), Feng Guo-Qiang (封国强), Han Jian-Wei (韩建伟) %T A single-event transient induced by a pulsed laser in a silicon-germanium heterojunction bipolar transistor %0 Journal Article %D 2013 %J Chin. Phys. B %R 10.1088/1674-1056/22/5/056103 %P 56103-056103 %V 22 %N 5 %U {https://cpb.iphy.ac.cn/CN/abstract/article_114792.shtml} %8 2013-04-01 %X A study on single event transient (SET) induced by pulsed laser in silicon-germanium (SiGe) heterojunction bipolar transistor (HBT) is presented in this work. The impacts of laser energy and collector load resistance on the SET are investigated in detail. The waveform, amplitude, and width of the SET pulse as well as collected charge are used to characterize the SET response. The experimental results are discussed in detail and it is demonstrated that the laser energy and load resistance significantly affect the SET in the SiGe HBT. Furthermore, the underlying physical mechanisms are analyzed and investigated, and a near-ideal exponential model is proposed for the first time to describe the discharge of laser-induced electrons via collector resistance to collector supply when both base-collector and collector-substrate junctions are reverse biased or weakly forward biased. Besides, it is found that an additional multi-path discharge would play an important role in the SET once the base-collector and collector-substrate junctions get strongly forward biased due to a strong transient step charge by the laser pulse.