$addanisomobility

$addanisomobility is the command to replace the const mobility setting in the $parameter setting. It is used for carriers with different mobility in different directions.

$addanisomobility
$\mu_{n,x} ~~  \mu_{n,y} ~~  \mu_{p,x} ~~  \mu_{p,y} ~~$ 
$\mu_{n,x} ~~  \mu_{n,y} ~~  \mu_{p,x} ~~  \mu_{p,y} ~~$ 
$\mu_{n,x} ~~  \mu_{n,y} ~~  \mu_{p,x} ~~  \mu_{p,y} ~~$ 
$\mu_{n,x} ~~  \mu_{n,y} ~~  \mu_{p,x} ~~  \mu_{p,y} ~~$ 
$\mu_{n,x} ~~  \mu_{n,y} ~~  \mu_{p,x} ~~  \mu_{p,y} ~~$ 
$\mu_{n,x} ~~  \mu_{n,y} ~~  \mu_{p,x} ~~  \mu_{p,y} ~~$ 

If you have n layers (regions), you need to put n lines. The mobility should not be zero.