Patent ID: 9401264
Filing Date: 2016-07-26
CPC Classification: H01J

Claim Text:
1. A plasma system comprising: a radio frequency (RF) generator; a matchbox including an impedance matching circuit, the impedance matching circuit coupled to the RF generator via an RF cable; a plasma reactor coupled to the matchbox via a portion of an RF supply path, the plasma reactor including a chuck, the RF supply path extending from the RF generator through the matchbox, and to the chuck; a phase adjusting circuit coupled to the portion of the RF supply path between the impedance matching circuit and the chuck, the phase adjusting circuit having a first end coupled to a connection point on the portion of the RF supply path and a second end that is connected to ground; and a controller coupled to the phase adjusting circuit, the controller for changing a parameter of the phase adjusting circuit to control an impedance of the RF supply path based on a tune recipe.