Patent ID: 11967485
Assignee: TOKYO ELECTRON LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A plasma processing apparatus comprising:
a chamber having a processing space in which a plasma processing is performed on a substrate and a synthetic space in which electromagnetic waves are synthesized;
a dielectric window configured to partition the processing space and the synthetic space;
an antenna unit including a plurality of antennas configured to radiate the electromagnetic waves to the synthetic space and configured to function as a phased array antenna;
an electromagnetic wave output part configured to output the electromagnetic waves to the antenna unit; and
a controller configured to control the antenna unit to function as the phased array antenna,
wherein the plurality of antennas are helical antennas, and
wherein each of the helical antennas has a pitch in a range of λ/12 to λ/8 and a number of turns of 1 to 3, where λ is a wavelength of the electromagnetic waves.