Patent ID: 11935730
Assignee: LAM RESEARCH CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A method for cleaning an edge ring pocket, comprising:
providing one or more process gases to a plasma chamber;
supplying a low frequency (LF) radio frequency (RF) power to an edge ring that is located adjacent to a chuck of the plasma chamber, wherein a portion of the edge ring pocket is defined by a top surface of the edge ring; and
supplying high frequency (HF) RF power to the chuck;
wherein said supplying the LF RF power and said supplying the HF RF power are performed while the one or more process gases are supplied to the plasma chamber to maintain plasma within the plasma chamber,
wherein said supplying the LF RF power energizes plasma ions in the plasma to remove residue in the edge ring pocket,
wherein said supplying the LF RF power and said supplying the HF RF power are performed during a time interval in which a substrate is not being processed within the plasma chamber.