Patent ID: 6652709
Filing Date: 2003-11-25
Classification: H01J,H01L

Abstract:
A plasma processing apparatus comprising:a plasma generation chamber; a support means for supporting an article; a gas introducing means for introducing a gas into the plasma generation chamber; an evacuation means for evacuating the plasma generation chamber; a microwave applicator comprising an endless circular waveguide having two microwave introducing ports provided at an interval of 180Â° in an upper surface of the circular waveguide and a plurality of slots for supplying microwaves into the plasma generation chamber; and a junction means comprising a single inlet for microwaves connected to a single microwave oscillator and two outlets for microwaves connected to the two microwave introducing ports of the circular waveguide, wherein the circumferential length of the circular waveguide, which is the length of an annulus formed by connecting the centers of cross-sections of the circular waveguide together, is an odd multiple of the guide wavelength, and wherein the junction means is an H-plane junction for distributing microwaves in two directions.