Patent ID: 11948775
Assignee: ASM AMERICA, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A system comprising:
an RF source generating an RF signal delivering a power, the RF source being subject to a power control scheme to control the power delivered by the RF source;
an impedance matching network coupled between the RF source and a plasma chamber, the matching network comprising:
an RF input configured to receive the RF signal from the RF source;
an RF output configured to operably couple to the plasma chamber; and
a variable reactance element (VRE), the VRE having different positions for providing different reactances; and

a control circuit configured to:
determine a parameter related to the matching network or the plasma chamber;
based on the determined parameter, determine from the different positions of the VRE a new position for the VRE to reduce a reflected power at the RF input of the matching network;

wherein the power control scheme is configured to be altered; and
wherein, while the power control scheme is altered, the matching network alters the VRE to the new position.