Patent ID: 11881382
Assignee: SEMES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A substrate treating method for a substrate treating apparatus including a substrate supporting unit comprising an electrostatic chuck and a plasma generating unit comprising:
supplying a DC voltage to the substrate supporting unit and supplying an RF power to the plasma generating unit, the DC voltage being a DC voltage for chucking the substrate and the RF power being a process RF power for treating the substrate;
supplying a second discharging DC voltage smaller than the DC voltage to the substrate supporting unit and supplying a second discharging RF power smaller than the process RF power to the plasma generating unit during a second discharging time period;
supplying the second discharging DC voltage to the substrate supporting unit and supplying a third discharging RF power greater than zero and smaller than the second discharging RF power to the plasma generating unit during a third discharging time period after the second discharging time period; and
supplying a first discharging DC voltage smaller than the DC voltage to the substrate supporting unit and supplying a first discharging RF power smaller than the process RF power, smaller than the second discharging RF power, and greater than the third discharging RF power to the plasma generating unit during a first discharging time period prior to the second discharging time period.