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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?
 

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...
 

but i dont have cmo in my materials!
 

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
 

... 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?
 
Last edited:

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