Keithley 4200A-SCS - RPM Configuration and Connections

Section
4: Multi-frequency capacitance-voltage unit Model 4200A-SCS Parameter Analyzer
Reference Manual
4-48 4200A-901-01 Rev. C / February 2017
Formula: BEST_HI
Formula name: BEST_HI
Units: None
Description: Index from DEPTHM array that is 95% of maximum depletion length or twice the
screening length in the semiconductor, whichever is larger.
Formulator entry:
BEST_HI = FINDD(DEPTHM,COND(2*DEBYEM*SQRT(LN(ABS(N90W/NI))),MAX(DEPTHM),
2*DEBYEM*SQRT(LN(ABS(N90W/NI)))), 0.95*MAX(DEPTHM), 2)
Formula: BEST_LO
Formula name: BEST_LO
Units: None
Description: Index from DEPTHM array that is three Debye lengths from the surface.
Formulator entry:
BEST_LO = FINDD(DEPTHM, 3*DEBYEM, 2)
Formula: CADJ
Formula name: CADJ (C
ADJ
)
Units: F
Description: Corrected capacitance by compensating series resistance.
Formulator entry:
CADJ = ((GP_GB^2 + (2*PI*F_GB*CP_GB)^2)*(CP_GB)/(AR^2 + (2*PI*F_GB*CP_GB)^2)
Simplified equation:
Formula: CFB
Formula name: CFB (C
FB
)
Units: F
Description: Flatband capacitance.
Formulator entry:
CFB = (COX*ES*AREA/(DEBYEM*1E2))/(COX+(ES*AREA/(DEBYEM*1E2)))
Simplified equation: