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[Moved]: Error in simulation of silvaco atlas

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kazem_pch

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Hi , i am tring to simulate CNTFET in silvaco atlas ,but when i want to have self-heating effect i use lat.temp model give me an error :
Error: No default thermal conductivity model for material CMO.
Please specify model

what do ia have to do?
 

timof

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Isn't the error message clear?

Your material CMO does not have certain material properties defined - thermal conductivity.
Define it, and the error message should go away...
 

kazem_pch

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but i dont have cmo in my materials!
 

kazem_pch

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this is my code

Code:
################################  MOSFET cnt ################
####x>>0-11.00334 ,y>>-0.16
#structre

go atlas

mesh  space.mult=1  width=0.096
  
###################################  X direction

x.mesh location=0      spacing=0.3
x.mesh location=0.032  spacing=0.1
x.mesh location=0.064  spacing=0.01
x.mesh location=0.096  spacing=0.001
x.mesh location=0.128  spacing=0.01
x.mesh location=0.160  spacing=0.3

###################################  Y direction


y.mesh location=0             spacing=0.1
y.mesh location=0.003         spacing=0.01
y.mesh location=0.00334       spacing=0.001 
y.mesh location=10.00334      spacing=0.1
y.mesh location=11.00334      spacing=0.1



####################################  REGION DEFINE  ##################################################
 
region  num=1  silicon             x.min=0      x.max=0.160      y.min=10.00334      y.max=11.00334
  
region  num=2  oxide               x.min=0      x.max=0.160      y.min=0.00334       y.max=10.00334

region  num=3  material=cnt        x.min=0      x.max=0.160      y.min=0.003         y.max=0.00334

region  num=4  material=HFO2       x.min=0      x.max=0.160      y.min=0             y.max=0.003


###################################  ELECTRON DEFINE ##################################################


electrode num=1  name=SOURCE   x.min=0        x.max=0.032    y.min=0.003     y.max=0.003  
electrode name=DRAIN           x.min=0.128    x.max=0.160    y.min=0.003     y.max=0.003
electrode name=GATE            x.min=0.064    x.max=0.096    top
electrode name=BULK            bottom

###################################  DOPING DEFINE  ###################################################

doping uniform p.type concent=1e16 region=1
doping uniform n.type concent=1e21 x.min=0       x.max=0.064    y.min=0.003    y.max=0.00334
doping uniform n.type concent=1e21 x.min=0.096   x.max=0.160    y.min=0.003    y.max=0.003

#################################### MATERIAL DEFINE ##################################################
material  material=hfo2   permittivity=16   tcon.const   tc.const=1.2
material  material=oxide  permittivity=3.9   
material  material=cnt    permittivity=5.4    affinity=5.8   EG300=0.026  nc300=3e17  nv300=3e17 nc.f=0  nv.f=0   mun=8138  mup= 8138   
################################### model define ###########################################
model      srh  auger  bgn fldmob  conmob arora
#model thermal
#model    lat.temp 

model  print
#thermcontact  num=1      y.min=0   y.max=0      ext.temp=300  alpha=5000

################################### contact #################################################

CONTACT NAME=GATE aluminum




################################### METHOD DEFINE    ###################################################
method gummel newton


################################### save  structure  ###################################################
output   hcte.joule  con.band val.band e.mob  h.mob area  e.temp  h.temp   impact  band.temp  u.auger u.radiative u.srh  polar.charge charge band.par
#output    con.band val.band e.mob  




################################### SOLVE   DC  analyz  IdVD   ####################################################

solve init
solve vSOURCE=0
solve vGATE=1
log outf=1VCNTO.log
solve vDRAIN=0 vstep=0.05 vfinal=6 name=DRAIN
log off

tonyplot 1VCNTO.log



save outf=CNTO.str
tonyplot CNTO.str
 

erikl

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... self-heating effect i use lat.temp model give me an error :
Error: No default thermal conductivity model for material CMO.
Please specify model
but i dont have cmo in my materials!
Code:
...
#model thermal
#model    lat.temp 
...
The models thermal & lat.temp are commented out.

However I don't know if the lat.temp model contains the CNT thermal conductivity value.
Nor do I know what's meant by CMO. Perhaps an umbrella term for CNT type layer materials?
 
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