1998
DOI: 10.1109/23.736454
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Modeling low-dose-rate effects in irradiated bipolar-base oxides

Abstract: A physical model is developed to quantify the contribution of oxide-trapped charge to enhanced low-dose-rate gain degradation in bipolar junction transistors. Multiple-trapping simulations show that space charge limited transport is partially responsible for low-dose-rate enhancement. At low dose rates, more holes are trapped near the silicon-oxide interface than at high dose rates, resulting in larger midgap voltage shifts at lower dose rates. The additional trapped charge near the interface may cause an expo… Show more

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Cited by 51 publications
(6 citation statements)
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References 28 publications
(26 reference statements)
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“…This explains the huge difference in degradation rate between high and low dose rates in the initial stage of irradiation. With the increase of irradiation time, the proton release reactions of the large amount of holes which escaped recombination under the low dose rate with the hydrogenated oxygen vacancies in the process of transport towards the Si/SiO 2 interface [17] are dominated as shown in Equation 3below. The released proton starts to arrive to the Si/SiO 2 interface and reacts with the silicon dangling bond.…”
Section: Discussionmentioning
confidence: 99%
“…This explains the huge difference in degradation rate between high and low dose rates in the initial stage of irradiation. With the increase of irradiation time, the proton release reactions of the large amount of holes which escaped recombination under the low dose rate with the hydrogenated oxygen vacancies in the process of transport towards the Si/SiO 2 interface [17] are dominated as shown in Equation 3below. The released proton starts to arrive to the Si/SiO 2 interface and reacts with the silicon dangling bond.…”
Section: Discussionmentioning
confidence: 99%
“…This leads to enhanced low-dose-rate sensitivity (ELDRS) in these bipolar technologies. Several models have been proposed to explain ELDRS [18,19,20,21,22,23]. The most widely accepted model is a space-charge model [18,19,22,23].…”
Section: Project Description and Discussionmentioning
confidence: 99%
“…Особенностью МОП-структур в биполярных приборах являются большая толщина базового оксида и низкая напряженность электрического поля. В этом случае образующийся при захвате дырок на ловушки ОЗ может менять распределение и направление электрического поля, что полагается причиной ELDRS в моделях [13,14]. Отметим, что даже при малых или нулевых напряжениях на затворе вследствие наличия собственного фиксированного заряда Q ∼ 10 11 см −2 в термическом диоксиде кремния имеется внутреннее электрическое поле E = qQ/εε 0 ∼ 0.01 МВ/см.…”
Section: E T E Junclassified
“…обзор [12]). Эффект ELDRS связывали с образованием объемного заряда [13][14][15] и с бимолекулярными реакциями рекомбинации свободных и связанных электронов и дырок [16,17]. С увеличением интенсивности ИО при наличии рекомбинационных центров возрастает скорость взаимной рекомбинации электронов и дырок и таким образом уменьшается суммарное количество захваченных дырок, отвечающих за образование ОЗ и ПС.…”
Section: Introductionunclassified