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电离辐射对部分耗尽SOI器件关态电流的影响

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Abstract:

针对辐射前后环栅与条栅结构部分耗尽绝缘体上硅(SOI,SiliconOnInsulator)器件关态电流的变化展开实验,研究结果表明辐射诱使关态电流增加主要取决于侧壁泄漏电流、背栅寄生晶体管导通、带-带隧穿与背栅泄漏电流的耦合效应.在条栅结构器件中,辐射诱生场氧化层固定电荷将使得器件侧壁泄漏电流增加,器件前、背栅关态电流随总剂量变化明显;在环栅结构器件中,辐射诱使背栅晶体管开启将使得前栅器件关态电流变大,而带-带隧穿与背栅泄漏电流的耦合效应将使得器件关态电流随前栅电压减小而迅速增加.基于以上结果,可通过改良版图结构以提高SOI器件的抗总剂量电离辐射能力.

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