The mechanism of etching a tantalum lm with pure chlorine plasma was studied using an electron
cyclotron resonance plasma system. The emission intensity was measured by using optical emission
spectroscopy, and the relative density of Cl radicals was...
The mechanism of etching a tantalum lm with pure chlorine plasma was studied using an electron
cyclotron resonance plasma system. The emission intensity was measured by using optical emission
spectroscopy, and the relative density of Cl radicals was estimated by using Ar actinometry. The
chemical reaction between Cl and Ta resulting in the formation of TaClx with a low vapor pressure,
can proceed only after the removal of the native Ta oxide on the surface. The sputter-assisted
dissociation of TaClx into TaClx