Patent ID: 9663856
Date: 2017-05-30
CPC Classifications: B05B,C23C,H01J

Claim:
1. A plasma processing apparatus including a processing vessel in which a plasma process is performed and a plasma generation antenna having a shower plate which supplies a first gas and a second gas into the processing vessel, the plasma processing apparatus performing the plasma process on a substrate with plasma generated by a surface wave formed on a surface of the shower plate through a supply of a microwave, wherein the shower plate has a plurality of gas holes configured to supply the first gas into the processing vessel and a plurality of supply nozzles configured to supply the second gas into the processing vessel, the supply nozzles are protruded vertically downwards from a bottom surface of the shower plate and are provided at different positions from the gas holes, the supply nozzles are configured to pass through a region having an electron temperature higher in the vicinity of the shower plate than in any other region under the vicinity of the shower plate, and a distance from the bottom surface of the shower plate to a lower end of each supply nozzle is equivalent to about 1/16 to about 3/16 of a wavelength of the supplied microwave.