Patent ID: 6669812
Filing Date: 2003-12-30
Classification: H01J

Abstract:
An apparatus for fabricating a semiconductor device, the apparatus comprising:a reaction chamber in which an object to be processed is positioned and subjected to plasma processing of a gas introduced into the reaction chamber; plasma generating means for generating plasma regions above a region where the object is positioned in the reaction chamber, the plasma regions including a plasma glow region and a plasma sheath underlying the plasma glow region; at least one dust-collecting electrode disposed inside the reaction chamber, and disposed so as to intersect with the same plane as the interface between the plasma glow region and the plasma sheath and biased at a positive potential; a voltage source connected to said at least one dust-collecting electrode to bias said at least one dust-collecting electrode, an exhaust pipe disposed on a wall of the reaction chamber facing said at least one dust-collecting electrode, and having an opening for simultaneously exhausting said gas and particles attracted to said at least one dust-collecting electrode in generating plasma, said opening extending substantially perpendicular to said at least one dust-collecting electrode and positioned about an axis corresponding to the direction of movement of particles attracted by said at least one dust collecting electrode.