Response of pMOS dosemeters on gamma-ray irradiation during its re-use

被引:12
|
作者
Pejovic, Milic M. [1 ]
Pejovic, Momcilo M. [1 ,2 ]
Jaksic, Aleksandar B. [3 ]
机构
[1] Univ Nis, Fac Elect Engn, Nish 18000, Serbia
[2] Univ Nis, Serbian Acad Sci & Arts, Ctr Sci Res, Nish, Serbia
[3] Tynall Natl Inst, Cork, Ireland
关键词
INTERFACE-TRAP FORMATION; TIME-DEPENDENCE; RADIATION; SENSITIVITY; TRANSISTORS; CENTERS; CHARGE; POSTIRRADIATION; HYDROGEN; MOSFET;
D O I
10.1093/rpd/nct026
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Response of pMOS dosemeters during two successive irradiations with gamma-ray irradiation to a dose of 35 Gy and annealing at room and elevated temperature has been studied. The response was followed on the basis of threshold voltage shift, determined from transfer characteristics, as a function of absorbed dose or annealing time. It was shown that the threshold voltage shifts during first and second irradiation for the gate bias during irradiation of 5 and 2.5 V insignificantly differ although complete fading was not achieved after the first cycle of annealing. In order to analyse the defects formed in oxide and at the Si/SiO2 interface during irradiation and annealing, which are responsible for threshold voltage shift, midgap and charge-pumping techniques were used. It was shown that during first irradiation and annealing a dominant influence to threshold voltage shift is made by fixed oxide traps, while at the beginning of the second annealing cycle, threshold voltage shift is a consequence of both fixed oxide traps and slow switching traps.
引用
收藏
页码:394 / 403
页数:10
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