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高温大电流应力对TiAl/GaAs和TiPtAu/GaAsSchottky二极管Richardson图的影响

Keywords: Schottky二极管,势垒,Richardson图

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Abstract:

研究了高温和大电流应力对TiAl/GaAs和TiPtAu/GaAsSchottky二极管Ⅰ~Ⅴ特性及对Richardson图的影响.研究发现,随着应力时间的增加,在Richardson图上,对TiAl/GaAsSchottky二极管势垒高度快速降低,Richardson常数和二极管的面积之积SA~*也快速减少,而TiPtAu/GaAsSchottky二极管势垒高度和SA~*先快速增加,后趋于稳定常数.在Ⅰ~Ⅴ曲线上,TiAl/GaAsSchottky二极管反向饱和电流增加,TiptAu/GaAsSchottky二极管反向饱和电流先快速减少,后趋于常数.这是由于在金属/GaAs界面形成了金属间化合物的结果.

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