Patent ID: 11961720
Assignee: T.O.S CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A multi-channel device for detecting plasma at an ultra-fast speed, comprising:
a first antenna module connected to a first output terminal in contact with a substrate on a chuck of a process chamber and extending to ground, and receiving a first leakage current leaking through the substrate to increase reception sensitivity of the first leakage current;
a first current detection module detecting the first leakage current;
a current measurement module receiving the first leakage current output from the first current detection module, and extracting the received first leakage current for each predetermined period to generate a first leakage current measurement information;
a control module comparing the first leakage current measurement information with a reference value to generate first arcing occurrence information;
a second antenna module connected to a second output terminal extending from the chuck to the ground, and receiving a second leakage current leaking from the chuck to increase reception sensitivity of the second leakage current, after power is supplied to warm the chuck;
a filter module connected to a rear end of the second antenna module and removing noise from the second leakage current output from the second antenna module; and
a second current detection module detecting the second leakage current.