Model 4200A-SCS Parameter Analyzer Reference Manual
Section 4: Multi-frequency capacitance-voltage unit
4200A-901-01 Rev. C / February 2017
4-65
moscap-lifetime formulas and constants
Tests in this project use the same formulas as the ones for the
cvu-moscap
project. It also uses
additional formulas (used by the
gni-w-wf
test) and user-defined constants, which are summarized
in the following tables. The formulas and constants are set from the Formulator for the tests.
Note that results of the C
OX
, C
MIN
, and N
AVG
formulas (used by the
c-v
test) are needed for the
gni-
w-wf
test. You must manually input the results into the Formulator for the
gni-w-wf
test.
When configuring the project, you must input the area of the gate (in units of cm
2
) and the dope type
(
−
1 for P-type, 1 for N-type) of the device into the Constants area of the Formulator.
Details for referenced equations are in the documentation for
Generation velocity and generation
(on page D-60).
Formula: GNI
Formula name: GNI (G/ni)
Units: s
-1
Description: Generation rate.
Formulator entry:
GNI = -(ES*AREA*NAVG*COX)*DIFF(MAVG(1/CP^2, 5), TIME)/NI
Simplified equation:
Formula: WF
Formula name: WF (WF)
Units: cm
Description: Equilibrium inversion depth.
Formulator entry:
WF = ES*AREA*(1/MIN(CP_GB)-1/COX)
Simplified equation:
