求助Silvaco mixedmode 中关键词“width”的定义

Example：
1.go atlas
2. .BEGIN
3. V1 1 0 1000.
4. R1 1 2 1m
5. L1 2 3 2nH
6. R2 4 0 1MG EXP 1MG 1E-3 0. 20NS 10 200
7. IL 0 4 300
8. ADIODE 3=cathode 4=anode WIDTH=5.E7 INFILE=pd.str
9. .NUMERIC LTE=0.3 TOLTR=1.E-5 VCHANGE=10.
10..OPTIONS PRINT RELPOT WRITE=10
11.$
12..LOAD INFILE=pdsave
13..LOG OUTFILE=pd
14..SAVE MASTER=pd
15.$
16..TRAN 0.1NS 2US
17.$
18..END
19.$
20.MODELS DEVICE=ADIODE REG=1 CONMOB FLDMOB CONSRH AUGER BGN
21.MATERIAL DEVICE=ADIODE REG=1 TAUN0=5E-6 TAUP=2E-6
22.IMPACT DEVICE=ADIODE REG=1 SELB
23.$
24.METHOD CLIM.DD=1.E8 DVMAX=1.E6
25.$
26.go atlas
27.tonyplot pd_tr.log
使用说明解释如下：
WIDTH：Device width. This is an optional parameter (default=1). All currents through ATLASdevice terminals calculated using the 2D ATLAS model will be multiplied by this parameter to account for the third dimension of the device. width can still be used as a multiplier to the ATLAS current if a 3D ATLAS structure is used in MIXEDMODE3D.
求助各位大佬width指的单位长度是多少?纳米，微米还是毫米。比如例子中的5e7是5e7微米还是5e7纳米还是5e7毫米

顶，求助啊，毕设遇到的问题

um
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