如何用atlas仿击穿电压。

代码如下go atlas
set vstart=0
set vstop=15
set vinc =.5
mesh
x.m l=0.0 s=0.25
x.m l=0.5 s=0.25
x.m l=1.0 s=0.25
x.m l=3.49 s=0.15
x.m l=3.5 s=0.15
x.m l=5.5 s=0.15
x.m l=5.51 s=0.15
x.m l=8.0 s=0.15
x.m l=8.5 s=0.25
x.m l=9.0 s=0.25
y.m l=0.0 s=0.25
y.m l=0.01 s=0.15
y.m l=0.32 s=0.15
y.m l=0.33 s=0.001
y.m l=0.355 s=0.001
y.m l=0.43 s=0.05
y.m l=0.6 s=0.1
y.m l=0.7 s=0.3
y.m l=1.355 s=1
region num=1 x.min=0 x.max=9 y.min=0.33 y.max=0.355 mat=AlGaN x.comp=0.3
region num=2 x.min=0 x.max=3.49 y.min=0.01 y.max=0.33 mat=SiN
region num=3 x.min=5.51 x.max=9 y.min=0.01 y.max=0.33 mat=SiN
region num=4 x.min=0 x.max=9 y.min=0.355 y.max=1.355 mat=GaN substrate
region num=5 x.min=0 x.max=3.49 y.min=0 y.max=0.01 mat=Al2O3
region num=6 x.min=3.49 x.max=3.5 y.min=0 y.max=0.33 mat=Al2O3
region num=7 x.min=3.5 x.max=5.5 y.min=0.32 y.max=0.33 mat=Al2O3
region num=8 x.min=5.5 x.max=5.51 y.min=0 y.max=0.33 mat=Al2O3
region num=9 x.min=5.51 x.max=9 y.min=0 y.max=0.01 mat=Al2O3
elec num=1 name=source x.min=0 x.max=0.5 y.min=0.33 y.max=0.43
elec num=2 name=drAIn x.min=8.5 x.max=9 y.min=0.33 y.max=0.43
elec num=3 name=gate x.min=3.5 x.max=5.5 y.min=0 y.max=0.32
elec num=4 substrate
contact name=gate work=5
contact name=source work=3.93
contact name=drain work=3.93
models print srh
mobility albrct.n
model polarization calc.strain polar.scale=0.8
output con.band val.band charge polar.charge band.par
method newton trap maxtrap=20
solve init
save outf=first.str
log outf=hemtex02.log
solve vgate=-10
solve vdrain=0.025 vstep=0.025 vfinal=0.4 name=drain
#
method newton trap itlim=35 maxtrap=6
solve vdrain=0.50 vstep=0.25 name=drain vfinal=30 compl=1.e-3 e.comp=3
#
tonyplot hemtex02.log

始终仿不出来击穿特性。是哪儿出问题了呢?

我也有同样的情况，现在仿真出来了吗

击穿时电流变化很大，但电压变化很小，所以你可以尝试用电流step