Patent ID: 9741541
Date: 2017-08-22
CPC Classifications: H01J

Claim:
1. A high frequency plasma apparatus, comprising: a reaction chamber; a first electrode and a second electrode, located inside the reaction chamber, wherein a shape of the first electrode and a shape of the second electrode are approximately square; a plasma discharge region, located between the first electrode and the second electrode; and a plurality of feed points, located at one of the first electrode and the second electrode so as to introduce high-frequency signals into the reaction chamber to further generate simultaneously a first standing wave and a second standing wave with different temporal and spatial patterns in the plasma discharge region, wherein at least two of the plurality of feed points are located at one lateral side of one of the first electrode and the second electrode; and wherein, by adding the first standing wave and the second standing wave in a superposition manner, discharge uniformity of the high frequency plasma is improved.