Total ionizing dose effects of domestic SiGe HBTs under different dose rate

TL;DR

This study investigates the effects of different dose rates of gamma radiation on SiGe HBTs, revealing dose rate-dependent damage and potential ELDRS effects, with implications for radiation-hardening in electronics.

Contribution

It provides new insights into dose rate effects and physical mechanisms of TID damage in domestic SiGe HBTs under gamma irradiation.

Findings

KT1151 shows time-dependent damage effects.

KT9041 exhibits higher degradation at low dose rates.

Potential ELDRS effect identified in KT9041.

Abstract

The total ionizing radiation (TID) response of commercial NPN silicon germanium hetero-junction bipolar transistors (SiGe HBTs) produced domestic were investigated under the dose rate of 800mGy(Si)/s and 1.3mGy(Si)/s with Co-60 gamma irradiation source, respectively. The changes of the transistor parameter such as Gummel characteristics, excess base current before and after irradiation are investigated. The results of the experiments shows that for the KT1151, the radiation damage have slightly difference under the different dose rate after the prolonged annealing, shows an time dependent effect(TDE). But for the KT9041, the degradations of low dose rate irradiation are more higher than the high dose rate, demonstrate that there have potential enhanced low dose rate sensitive(ELDRS) effect exist on KT9041. The underlying physical mechanisms of the different dose rates response induced by the gamma ray are discussed.