Multiscale Monte Carlo Simulation of Circular DC Magnetron Sputtering: Influence of Magnetron Design on Target Erosion and Film Deposition
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概要
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We present an experimental and computational study of the effect of magnetron design on the target erosion profile, wafer-level deposition uniformity, and feature-scale deposition topography in a circular DC magnetron sputtering system. We have conducted a multiscale Monte Carlo simulation consisting of a particle-in-cell Monte Carlo collision plasma simulation for target sputter erosion, a collisional transport simulation for film deposition, and a feature-scale deposition topography simulation. The entire simulation results for each step are verified in comparison with the experimental results for various process conditions. A new semiempirical calibration method, for converting an estimated ion current density distribution into a target erosion profile, is proposed with regard to the gas rarefaction effect due to sputtering wind. In conclusion, the whole performance indices of a circular DC magnetron sputtering system are substantially influenced by magnetron design, and the effectiveness of our multiscale Monte Carlo simulation methodology is validated.
- 2006-11-15
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