On the Kinetics of the Active Zone of the Stationary SF₆ Beam Discharge Plasma

Abstract

dbstract The paper deals with the impact of intensive electron nttachment on the kinetics of the electrons in the active zone of the stationary band-like beam discharge plasma in SF, which is an alternative useful plasma medium for "dry etching". The energy distribution of the electrons in this plasma was obtained by numerically solving the Boltzmann equation which includes apart from elastic collisions, different exciting collision processes, nttachment in electron collisions, direct ionization, the ambipolar loss of electrons, Coulomb interaction between electrons and of electrons with ions and the power input to the electrons by the turbulent electric field. In particular, due to the needed fulfilment of the consistent electron particle balance, for an extended region of the turbulence energy density in this plasma n large impact on the electron kinetics of the intensive electron attachment, which is the prevailing electron loss process, was found enforcing independent of the turbulence energy density always a large power input to the electrons, smooth and only slowly decreasing energy distributions even in the energy region of direct ionization.