akramdimassi
Newbie level 2
i have a problem in simulation of transistor ..i just fond that the voltage Vgs is not pratiqe on silvaco
Code:
# (c) Silvaco Inc., 2015
go atlas
TITLE a-si TFT simulation
mesh
#
x.m l=0 spac=0.1
x.m l=1 spac=0.1
x.m l=2 spac=0.1
x.m l=3 spac=0.1
#x.m l=4 spac=0.1
#x.m l=5 spac=0.1
#x.m l=6 spac=0.1
#x.m l=7 spac=0.1
#x.m l=8 spac=0.1
x.m l=9 spac=0.1
x.m l=10 spac=0.1
x.m l=11 spac=0.1
#x.m l=12 spac=0.1
#x.m l=13 spac=0.1
x.m l=14 spac=0.1
#x.m l=15 spac=0.1
x.m l=16 spac=0.1
x.m l=17 spac=0.1
x.m l=18 spac=0.1
x.m l=19 spac=0.1
x.m l=20 spac=0.1
#
y.m l=-0.03 spac=0.1
y.m l=-0.01 spac=0.0075
y.m l=0 spac=0.01
y.m l=0.01 spac=0.0075
y.m l=0.05 spac=0.1
y.m l=0.1 spac=0.1
y.m l=0.2 spac=0.1
y.m l=0.3 spac=0.25
y.m l=0.4 spac=0.25
y.m l=0.6 spac=1
#
#
# **************** regions ****************
# 1=oxide 2=silicon 3-oxide
#
region num=1 y.max=0. material=pentacene
region num=2 y.min=0. y.max=0.2 SiO2
region num=3 y.min=0.2 Silicon
#
# **************** electrodes ****************
# 1=gate 2=substrate 3=source 4=drain
#
#elec num=1 x.min=0 x.max=20 y.min=0.2 y.max=0.2 name=gate material=gold
elec num=1 substrate name=gate material=gold
elec num=2 x.min=0. x.max=4. y.min=0.0 y.max=0. name=drain material=gold
elec num=3 x.min=16.0 x.max=20.0 y.min=0.0 y.max=0. name=source material=gold
#
# **************** doping profiles ****************
#doping reg=1 uniform conc=1.e10 n.type
doping reg=1 gauss conc=3.e17 p.type char=0.3
#doping reg=1 gauss conc=3.e18 n.type x.left=15 char=0.3
#doping reg=3 uniform conc=1.e16
doping reg=3 gauss conc=1.e10 n.type char=0.3
material region=3 mun=20 mup=1.5 nc300=2.5e20 \
nv300=2.5e20 eg300=1.9
#
defects nta=1.e21 ntd=1.e21 wta=0.033 wtd=0.049 \
nga=1.5e15 ngd=1.5e15 ega=0.62 egd=0.78 wga=0.15 wgd=0.15 \
sigtae=1.e-17 sigtah=1.e-15 sigtde=1.e-15 sigtdh=1.e-17 \
siggae=2.e-16 siggah=2.e-15 siggde=2.e-15 siggdh=2.e-16
#contact name=gate workfunc=4.3
contact name=drain workfunc=4.3
contact name=source workfunc= 4.3
#
# Set parameters for polysilicon
#
#
contact num=1 N.poly
contact num=2 P.Poly
contact num=3 P.Poly
interface qf=-3e10
models cvt srh print
#
method itlimit=30
solve init
save outf=tftex04_0.str
tonyplot tftex04_0.str -set tftex04_0.set
#
# Electrode #1 - Gate, #2 - Substrate, #3 - Source, #4 - Drain
#
method newton trap
solve vgate=0.
solve vdrain=-0.1
solve vdrain=-0.15
solve vdrain=-0.2
solve vdrain=-1 vfinal=-10.0 vstep=-1 name=drain
#
# Solve id versus vg curve
#
#
log outf=tftex04.log master.out
solve vstep=-1 vfinal=-10 name=gate vdrain=-10
#
tonyplot tftex04.log -set tftex04_log.set
quit