Patent ID: 9506142
Filing Date: 2016-11-29
CPC Classification: C23C,H01J,H05H

Claim Text:
1. A microwave plasma generation apparatus that ionizes gas supplied into a vacuum casing to generate microwave plasma, comprising: a rectangular waveguide that transmits a microwave; a slot antenna that forms one face of the rectangular waveguide and that has a plurality of slots through which the microwave passes at the one face of the rectangular waveguide, wherein each of the plurality of slots has an oblong hole shape that extends in a longitudinal direction of the rectangular waveguide; and a single dielectric portion that is arranged in direct physical contact with the slot antenna that forms the one face of the rectangular waveguide, so as to cover the plurality of slots of the slot antenna and so that microwaves having passed through the plurality of slots enter the single dielectric portion in an incident direction, the single dielectric portion having a plasma generating region-side front face parallel to the incident direction and perpendicular to the one face of the rectangular waveguide at which the slot antenna is arranged.