Patent ID: 9646862
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A substrate processing apparatus comprising: a process chamber configured to accommodate a substrate; a substrate mounting unit installed in the process chamber and configured to have the substrate placed thereon, the substrate mounting unit comprising a choke groove disposed on a side surface thereof; and a microwave supply unit configured to supply microwaves to the substrate placed on the substrate mounting unit, wherein the microwave supply unit includes a microwave generator, a waveguide and a waveguide opening, the waveguide opening communicating with an inside of the process chamber, and wherein the choke groove comprises an upper inner surface and a lower inner surface facing each other, the upper inner surface and the lower inner surface are disposed along an outer circumferential direction of the substrate mounting unit and a depth of the choke groove from the side surface of the substrate mounting unit is equal to or less than one fourth of a wavelength of the microwaves supplied by the microwave supply unit.