Parameter Extraction of Advanced MOSFET Model Abhay Chopde

Parameter Extraction of Advanced MOSFET Model Abhay Chopde Department of Electronics Engineering Vishwkarma Institute of Technology, Pune. VLSI Design Course IUCEE 2008 Workshop, Mysore. 6/10/2021

Outline MOSFET Model MM 11 Introduction Parameters MOSFET Parameter Extraction Problem Definition Parameter extraction modules Evolutionary Algorithm IUCEE 2008 Workshop, Mysore 6/10/2021 2

MOS Model 11 • Developed by Philips • Suitable for modern/future CMOS processes • Surface potential based • Implemented physical effects: –mobility reduction –bias-dependent series resistance –velocity saturation –conductance effects (CLM, DIBL) –gate leakage current –gate-induced drain leakage –gate depletion –quantum-mechanical effects –bias-dependent overlap capacitances IUCEE 2008 Workshop, Mysore 6/10/2021 3 http: //www. nxp. com

MOS Model 11 Structure IUCEE 2008 Workshop, Mysore 6/10/2021 4 http: //www. nxp. com

MOS Model 11 Mini Set Parameters IUCEE 2008 Workshop, Mysore 6/10/2021 5 http: //www. nxp. com

MOSFET Parameter Extraction Parameter extraction: the determination of the parameters for given set of measured quantities, so that the values of current predicted by above equation (model) match closely the actual experimental measurement. IUCEE 2008 Workshop, Mysore 6/10/2021 6

MOSFET Parameter Extraction Modules Input parameter file with range for parameters to be extracted Model file (e. g. MM 11, BSIM, EKV etc. ) Measurement data Algorithm parameters Optimizer Model generated data using extracted parameters Extracted parameters IUCEE 2008 Workshop, Mysore 6/10/2021 7

Evolutionary Algorithms Simple Genetic Algorithm : Based on biological evolution of species. Particle Swarm Optimization : Based on the principle of birds flocking in search of food. Ant Colony Optimization : Optimization methodology based on ant behaviors. IUCEE 2008 Workshop, Mysore 6/10/2021 8

Summary Accurate Simulation of circuit depends not only on the model but also correct value of parameters. Parameter extraction is a critical area in deep submicron regime. IUCEE 2008 Workshop, Mysore 6/10/2021 9

See you Again! Q&A IUCEE 2008 Workshop, Mysore 6/10/2021 10