Patent ID: 7476301

Claim:
A procedure for the production of a plasma that is at least co-produced in the vacuum chamber ( 1 a ) of a vacuum recipient ( 1 ) of a device suitable for plasma processing with at least one induction coil ( 2 ) carrying an alternating current, where the gas used to produce the plasma is fed into the vacuum chamber ( 1 a ) through at least one inlet ( 3 ) and the vacuum chamber ( 1 a ) is subject to the pumping action of at least one pump arrangement ( 4 ), characterized in that a direct current is continuously applied during the plasma processing simultaneously with said alternating current to the induction coil ( 2 ) in order to influence the plasma density; and wherein said induction coil ( 2 ) is separated by means of a dielectric inner casing ( 7 ) or a dielectric window from at least the part of the vacuum recipient ( 1 ) in which the plasma is produced, the alternating current is produced by a high-frequency generator ( 6 ) operating at a frequency between 100 and 14,000 kHz, the plasma, is co-produced or co-excited by an electric voltage applied to at least one pair of electrodes ( 5 a , 5 b ) separated by a certain distance, the vacuum chamber ( 1 a ) contains a substrate table ( 8 ) for a substrate ( 9 ), the substrate table ( 8 ) is formed by an electrode ( 5 a ) and a dark space screening is used as counter-electrode ( 5 b ).