Patent ID: 11935776
Assignee: LAM RESEARCH CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for electrostatically clamping an edge ring in a plasma processing chamber with an electrostatic ring clamp with at least one ring backside temperature channel for providing a flow of gas to the edge ring to regulate the temperature; comprising:
providing a vacuum to the at least one ring backside temperature channel;
measuring pressure in the at least one ring backside temperature channel;
providing an electrostatic ring clamping voltage when the pressure in the at least one ring backside temperature channel reaches a threshold maximum pressure;
discontinuing the vacuum to the at least one ring backside temperature channel;
measuring pressure in the at least one ring backside temperature channel;
if pressure in the at least one ring backside temperature channel rises faster than a threshold rate, indicating sealing failure; and
if pressure in the at least one ring backside temperature channel does not rise faster than the threshold rate, providing a plasma process, using the at least one ring backside temperature channel to regulate a temperature of the edge ring.