大电流、高品质因子碳化硅肖特基二极管研究
首发时间:2017-04-24
摘要:本文利用CVD方法生长厚度为10μm 的4H-SiC低掺杂同质外延材料,研制了有源区面积为2mmx2mm的肖特基结构功率整流二极管(Schottky Barrier diode-SBD);采用泰克功率测试仪371B测试了器件的正向导通和击穿特性。测试结果表明,器件开启电压为0.85V;在正向电压5.5V时获得正向导通电流70A,对应电流密度为1750A/cm2; 反向最大击穿电压1600V,对应反向漏电流100μA;利用热电子发射理论,提取器件的肖特基势垒高度为0.86eV,理想因子为1.12。。
关键词: 4H-SiC 肖特基二极管 功率品质因子 击穿电压
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Study of the 4H-SiC Schottky with high current and figures of merit
Abstract:In this paper, the fabrication and characterization of a high performance 4H-SiC Schottky barrier recti?er (SBD) is reported using based on a 10μm 4H-SiC drift layer. Forward and breakdown voltage have been measured by the using Tektroni 371B Measurement results show that the forward current of 70Aat a forward voltage drop of 5.5V, correspongding forward current density of 1,750A/cm2, and near-ideal breakdown voltage of 1,600V has been achieved for reverse current up to 100μA. The Schottky barrier height and ideal factor were extracted to 0.86eV and 1.12.
Keywords: 4H-SiC Schottky arrier Diode Power quality factor Breakdwon voltage
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