5.2 Parameter Initialization

• Determine $V_{th}(L)$ by strong inversion region data using maximum slope extrapolation algorithm.
• Plot $\frac{V_d(\sim 0.05V)}{I_d(V_g,L)}$ vs. $L$ for different L's.
• Make linear fitting to the curve set above, extrapolate each straight line and find the intersection ($\Delta L$, $R_{series}$). Initialize $LINT = \frac{\Delta L}{2}$, $RDSW = R_{series}$ as shown in the Fig. 14.

Figure 14: Initialize $\Delta L$ and $R_{series}$

• Use constant-current method to extract $V_{th}(L)$ by using sub-threshold region data.
• Plot $\Delta V_{th}(L)$ vs. @ $V_d \sim 0.05V$ and $V_{dd}$ respectively. Extract short channel effect (SCE) and reverse SCE parameters $DVT0$, $DVT1$, $ETA0$, $DSUB$, $K1RSCE$, $LPE0$ as shown in Fig. 15 left.
• Plot $2.3n(L) \times \frac{kT}{q}$ vs. $L$ @ $V_d = 0.05V$ and $V_{dd}$. Extract $CDSC$, $CDSCD$, $DVT2$ as shown in Fig. 15 right.

Figure 15: Initialize SCE and RSCE parameters

• Set all other parameters in Category One and Two as default value as the manual shows.