Effect of bias condition on heavy ion radiation in bipolar junction transistors |
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| Authors: | Liu Chao-Ming Li Xing-Ji Geng Hong-Bin Yang De-Zhuang and He Shi-Yu |
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| Affiliation: | Department of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | The characteristic degradations in a silicon NPN bipolar junction transistor(BJT) of 3DG142 type are examined under irradiation with 40-MeV chlorine(Cl) ions under forward,grounded,and reverse bias conditions,respectively.Different electrical parameters are in-situ measured during the exposure under each bias condition.From the experimental data,a larger variation of base current(I B) is observed after irradiation at a given value of base-emitter voltage(V BE),while the collector current is slightly affected by irradiation at a given V BE.The gain degradation is affected mostly by the behaviour of the base current.From the experimental data,the variation of current gain in the case of forward bias is much smaller than that in the other conditions.Moreover,for 3DG142 BJT,the current gain degradation in the case of reverse bias is more severe than that in the grounded case at low fluence,while at high fluence,the gain degradation in the reverse bias case becomes smaller than that in the grounded case. |
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| Keywords: | radiation effects ionization damage displacement damage transistors |
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