Patent ID: 6878248
Filing Date: 2005-04-12
Classification: C23C,H01J

Abstract:
1. An apparatus for electrically feeding at last two electroconductive surfaces which are mutually electrically isolated from each other in a vacuum treatment apparatus wherein a vacuum atmosphere containing electrical charge carriers of the type that form electrically isolating material is provided, the apparatus comprising: a DC power supply; at least two electrical conductors connecting the DC power supply to outputs to be operationally connected to the at least two electroconductive surfaces; an inductor is one of the at least two electrical conductors a controlled parallel switching arrangement connected been the electrical conductors to control a current path between the conductors, the controlled parallel switching arrangement having a current path controllably switchable to higher and lower conductivities and connected between to be electrical conductors in between the DC power supply and the outputs be connected to the electroconductive surfaces; and a control arrangement connected to the parallel switching arrangement for controlling the switching arrangement, the control arrangement including a timing unit with a timing out output, operationally connected to said controlled parallel switching arrangement.