Patent ID: 6695948
Filing Date: 2004-02-24
Classification: H01J

Abstract:
A plasma processing apparatus comprising:a processing container shaped to be a hollow cylinder with a bottom and also provided, an inside thereof, with a mount table for mounting an object to be processed thereon; a lid body for covering an upper opening of the processing container in an airtight manner, the lid body having a dielectric; a microwave supplier for supplying a microwave; a waveguide having one end thereof connected to the microwave supplier, the waveguide extending from the microwave supplier toward the lid body and also having a waveguide space formed therein; a radial waveguide box connected to the other end of the waveguide, the radial waveguide box having a flange part expanding from the other end of the waveguide outward in the radial direction and a sidewall extending from the flange part toward the lid body downward thereby to define a waveguide space therein; an antenna member for covering a lower opening of the radial waveguide box and having a plurality of slots formed therein, the antenna member being arranged in parallel with the lid body; and a metallic reflector formed at the center of the antenna member on the side of the mount table so as to extend toward the mount table, for reflecting a high-frequency electric field reflected by an inner wall of the processing container, wherein the reflector is arranged not to project from the lid body into the processing container.