Patent ID: 6919107

Claim:
A method for treating a surface ( 17 ) with aid of a treatment gas or treatment gas mixture, comprising the steps of: breaking down said treatment gas or treatment gas mixture in a glow discharge plasma reaction sustained in a plasma space between two substantially parallel opposite faces ( 11 , 11 ′) of two suitably energized electrodes ( 10 , 10 ′), said electrode faces having aligned edges, whereby a plasma sustained between said electrodes includes an edge region that extends away from said plasma space and beyond the aligned edges of said electrodes; positioning the surface ( 17 ) to be treated in the edge region ( 14 ′) of the plasma, said surface ( 17 ) facing towards said aligned electrode edges ( 13 , 13 ′) and being positioned at a distance from said aligned electrode edges ( 13 , 13 ′), wherein a power density in the edge region ( 14 ′) is sufficient for sustaining the plasma.