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沟槽栅功率MOSFET导通电阻的模拟研究

Keywords: 沟槽栅MOSFET,导通电阻,击穿电压,器件仿真

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Abstract:

为了进一步降低沟槽栅功率MOS器件的导通电阻,提出了一种改进的trenchMOSFET结构.借助成熟的器件仿真方法,详细分析了外延层杂质掺杂对器件导通电阻和击穿电压的影响,通过对常规trenchMOSFET和这种改进的结构进行仿真和比较,得出了击穿电压和导通电阻折中效果较好的一组器件参数.模拟结果表明,在击穿电压基本相当的情况下,新结构的导通电阻较之于常规结构降低了18.8%.

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