Optimization of RF Frequencies in Dual-frequency Capacitively Coupled Plasma Apparatus Using Genetic Algorithm (GA) and Plasma Simulation

As a method to optimize the power frequency of dual-frequency plasma, we propose an optimization method that combines genetic algorithm and plasma simulation. A two-dimensional plasma simulation model of Ar plasma was constructed with a fluid model. Combining this simulation model with a genetic algorithm, plasma conditions with high plasma density and small variations in electron density were calculated. As a result, the optimum conditions were 175 to 210 MHz for the high-frequency generator and 0.5 to 4.0 MHz for the low-frequency generator.