Model and analysis of drain induced barrier lowering effect for 4H-SiC metal semiconductor field eff

来源 :Chinese Physics B | 被引量 : 0次 | 上传用户:cninfor
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Based on an analytical solution of the two-dimensional Poisson equation in the subthreshold region, this paper investigates the behavior of DIBL (drain induced barrier lowering) effect for short channel 4H-SiC metal semiconductor field effect transistors (MESFETs). An accurate analytical model of threshold voltage shift for the asymmetric short channel 4H-SiC MESFET is presented and thus verified. According to the presented model, it analyses the threshold voltage for short channel device on the L/a (channel length/channel depth) ratio, drain applied voltage VDS and channel doping concentration ND, thus providing a good basis for the design and modelling of short channel 4H-SiC MESFETs device. Based on an analytical solution of the two-dimensional Poisson equation in the subthreshold region, this paper investigates the behavior of DIBL (drain induced barrier lowering) effect for short channel 4H-SiC metal semiconductor field effect transistors (MESFETs). An accurate analytical model of threshold voltage shift for the asymmetric short channel 4H-SiC MESFET is presented and therefore verified. The threshold voltage for short channel device on the L / a (channel length / channel depth) ratio, drain applied voltage VDS and channel doping concentration ND, thus providing a good basis for the design and modeling of short channel 4H-SiC MESFETs device.
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