Abstract
The authors have studied on surface treatment of PTFE by a low pressure discharge.It is deduced that excited nitrogen molecules contribute to introduce polar'components on the surface.To confirm the speculation, we tried to change population of metastable nitrogen N2(A3Σ+ u) by quenching precursor N2 (B3IIg) with hydrogen molecule.The decrease of relaxation time which indicates a change of excited molecule and measured by emission spectroscopy using a time after glow method was obtained.
As a result, the relaxation times of N2 (B3IIg) and N2 (A3Σ+ u) decreased to 55% and 20% respectively, when mixing ratio of hydrogen was 3%. It was also deduced that hydrogen atom may take a part in a quenching process of N2 (A3Σ+ u).