Analysis of High Energy Ion, Proton and Co-60 Gamma Radiation Induced Damage in Advanced 200 GHz Sige HBTS

Authors K.C. Praveen1, N. Pushpa1, J.D. Cressler2, A.P. Gnana Prakash1

1 Department of Studies in Physics, University of Mysore, Manasagangotri, Mysore-570006, India

2 School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta-30302, Georgia, USA

Issue Volume 3, Year 2011, Number 1, Part 2
Dates Received 04 February 2011, in final form 29 April 2011, published online 08 May 2011
Citation K.C. Praveen, N. Pushpa, J.D. Cressler, et al., J. Nano- Electron. Phys. 3 No1, 348 (2011)
PACS Number(s) 72.20.Jv, 61.82.Fk, 61.80.Ed
Keywords 200 GHz SIGE HBT, Co-60 gamma, Proton (2) , Lithium ion irradiation, EB spacer oxide, STI oxide.
Third generation advanced Silicon-Germanium Heterojunction Bipolar Transistors (200 GHz SiGe HBTs) were exposed to different radiations like 50 MeV lithium ions, 63 MeV proton and Co-60 gamma radiation in the dose range of 300 krad to 10 Mrad. The DC electrical characteristics like forward mode Gummel characteristics, inverse mode Gummel characteristics, excess base current, current gain, neutral base recombination, avalanche multiplication and output characteristics were measured before and after irradiation for three different radiations and the results are compared in this paper. The results show that the Li + ions impart more energy and create significant amount of damage in the surface and bulk of the transistor when compared to gamma and proton irradiation.

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