Patent ID: 6040547
Filing Date: 2000-03-21
Classification: H01J

Abstract:
Gas discharge device comprising an axially symmetric chamber at least having one face wall, an HF power input unit for inputting the HF power to the chamber, coaxially arranged on the external wall of the chamber, and a magnetic system for providing a stationary magnetic field of which the magnetic induction decreases not only in the radial direction towards the chamber axis of symmetry but also in the longitudinal direction from the area in which the HF power input unit is located inside the chamber, characterized in that the HF power input unit is fabricated as an conductor of zigzag recurrent symmetric shape arranged on the face wall and lateral wall of the chamber, and in that the magnetic system is adjusted to generate the magnetic field of which the magnetic induction decreases in the longitudinal direction towards the face part of the chamber opposite to the area where the HF power input unit is arranged.