Dynamic Study of Dual High-Power Impulse Magnetron Sputtering Discharge by Optical Emission Imaging

Fast optical emission imaging was employed for dynamic study of dual-high-power impulse magnetron sputtering discharge. The sputtering sources were equipped with reversed polarity of magnets, i.e., so-called closed magnetic field between magnetrons. Plasma is confined in closed magnetic field between targets alternately employed as cathode/anode. This type of magnetic confinement affects the transport of electrons and also the ionization processes of neutral particles present in the plasma, as will be shown in this paper.