Abstract:
This thesis presents the designed structure and extraction modeling of the parasitic junction capacitance of p-n junction of NMOSFET in Very Large Scale Integrated Circuit (VLSI). To separate the area junction and the periphery junction component, the two test chips are designed .The designed structure is considered in two components. The rectangular structure (W=200 μm, L=400 μm) and the multi-fringe structure (W=4 μm, L=400 μm, number of strips=50) of p-n junction are used which the ratio between the perimeter and the area are low and high respectively. The extraction can lead to an improved accuracy on p-n junction capacitance. This methodology can extract parasitic capacitance due to bottom area junction and side-wall capacitance components at the field oxide side and gate oxide side. The junction capacitance model parameters in BSIM3V3 are proposed also. Use calculations by using the program Excel to extraction methodology. A comparison is made to check the accuracy of the capacitance models. The results show that the error is lower than 4%