Patent ID: 7640887

Claim:
A surface wave excitation plasma generator, comprising: a microwave generator; an annular microwave waveguide, comprising an inlet part for introducing microwave from the microwave generator, a fixed end part, and a bottom plate which serves as an inner surface and comprises one slot antenna formed thereon or a plurality of slot antennas disposed thereon at a predetermined interval; and a cylinder-shaped dielectric member, having an outer surface being connected to the bottom plate of the annular microwave waveguide, for introducing the microwave propagating in the annular microwave waveguide through the slot antenna, and generating surface wave excitation plasma by utilizing surface wave formed on the surface, wherein if a wavelength of the microwave in the waveguide is λg, and a constant k is in a range of 0.95 λg˜λg, a circumferential length of the inner surface of the bottom plate is set as an integral multiple of the constant k.