I can provide you with a basic example of a CMOS inverter circuit using Silvaco TCAD. Please note that specific code may vary depending on the version of TCAD you're using and your simulation requirements. Here's a simplified example:

```tcad

# Define materials and models

material nmos_material {

n.dos(Ec) = 1.0e16 # Density of states for electrons in the conduction band

# Add other material properties here

}

material pmos_material {

p.dos(Ev) = 1.0e16 # Density of states for holes in the valence band

# Add other material properties here

}

# Define device parameters

device nmos_device {

material = nmos_material

length = 0.1u # Channel length

width = 1u # Channel width

vdd = 1.8 # Supply voltage

temp = 300 # Temperature in Kelvin

# Add other device parameters here

}

device pmos_device {

material = pmos_material

length = 0.1u # Channel length

width = 1u # Channel width

vdd = 1.8 # Supply voltage

temp = 300 # Temperature in Kelvin

# Add other device parameters here

}

# Create the CMOS inverter

cmos_inverter {

nmos = nmos_device

pmos = pmos_device

vin = 0.0 # Input voltage

# Add other inverter parameters here

}

# Define simulation settings

simulator {

time = 1ns # Simulation time

method = dc # DC analysis

}

# Run the simulation

run cmos_inverter

```

Please note that this is a simplified example, and you may need to customize it further based on your specific CMOS inverter design and simulation requirements. Make sure to refer to the Silvaco TCAD documentation and user guides for more detailed information on using the tool for CMOS inverter simulations.

Thank you sir