$useevprofile

出自 DDCC TCAD TOOL Manual
於 2017年9月3日 (日) 10:41 由 Yrwu (對話 | 貢獻) 所做的修訂

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If the user needs to use field dependent mobility profile, he has several way to achieve this. The first way is to call $usefieldmufunc , $useemufunc, $useemunfunc, $useemupfunc. However, for this one, you will need to write the code by yourself. The other way is to give the program a E versus velocity table files. And you need to setup the region $xend and $yend to decide which region to use this profile.
Note that his function current is only support Ex field for electron transport in x direction since this function is for FET transistor case. It does not support for holes, neither. When this function is called, other regions or unsupported direction such as Ey or holes will use the constant mobility model.


Format:

$useevprofile
E-versus-v_filename
N_{total} format_type
N_{sep}
Format_type:
1: 
2:
3: Two different segments, N_sep separaet this two segments 
N_{sep}: which_column_the_second_format_start
N_{total}: total column number 



File format of E-versus-v_filename:

Ex1_1~~~ V_1
Ex1_2~~~ V_2
Ex1_3~~~ V_3
....
....
.... to N_sep-1
Ex2_{N_{sep}-1}~~~ V_1 
Ex2_{N_{sep}-1}~~~ V_2 
Ex2_{N_{sep}-1}~~~ V_3 
....
....
 Ex2_{N_{total}}~~~ V_{1} 



For examples:

$useevprofile
mcalgan32-GaN-InGaN.inp.vfoc.res
174 3
131
$xend
89.9999e-04 116.000001e-4
$yend
4.2001e-04 4.000e-04