Patent ID: 7644680
Filing Date: 2010-01-12
Classification: H05H

Abstract:
1. An electrode assembly for treatment of a substrate by a non-equilibrium plasma comprising: at least two spaced barrier electrodes and a ground electrode spaced apart from the at least two spaced barrier electrodes for passage of the substrate therebetween; each of the at least two barrier electrodes formed of a dielectric material and having an elongated configuration and a transverse orientation with respect to a direction of motion of the substrate, a central section containing a high voltage conductor and two leg sections angled away from the central section; said central and leg sections of said barrier electrodes having passages for introducing a cooling fluid into one of said leg sections and discharging said cooling fluid from the other of the leg sections and the central section having a transverse cross-sectional area less than that of the leg sections so that the cooling fluid has a higher velocity in the central section than said leg sections; a chamber located between and connected to the at least two spaced barrier electrodes, the chamber having openings for introducing the plasma medium between the at least two barrier electrodes towards the substrate so that the plasma medium flows toward the substrate and spreads out along the substrate towards inlet and outlet regions of the electrode assembly; and a plate-like baffle extending from the chamber towards the ground electrode; the openings to the chamber being located on opposite sides of said plate-like baffle to allow the flow of the plasma medium to be biased toward an inlet regions of the electrode assembly at which the substrate first enters the electrode assembly during treatment and thereby, to prevent ingress of air thereto.