Patent ID: 7989034

Claim:
A method for continuous atmospheric-pressure plasma treatment of electrically insulating workpieces, wherein an electrically insulating workpiece to be treated is arranged at a distance below a high-voltage electrode and the electrode and the work piece are set in motion in relation to one another in a direction of movement, and the electrode extends across the direction of movement, at least over the width of the surface of the workpiece to be treated, and wherein the plasma treatment occurs at atmospheric pressure and a high-voltage is applied to the high-voltage electrode; wherein a first space situated between the high-voltage electrode and the workpiece is filled with a first atmosphere having a first gas composition, where the first space is of a kind where the electrode does not directly contact the workpiece, and a second space situated on a side of the workpiece facing away from the high-voltage electrode and adjacent to a back side of the workpiece is filled with a second atmosphere that has a second gas composition, and wherein the second gas composition is a different gas or gas mixture than the first gas composition, and where the choice of voltage and the first and second atmospheres is made in such a way that a plasma discharge is ignited in only the second atmosphere.