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

Claim 0:
1. An apparatus for treating a substrate comprising:
a substrate supporting unit for supporting a substrate on an electrostatic chuck;
a plasma generating unit for generating a discharging plasma for discharging a charge of the substrate during de-chucking;
a DC voltage supplying unit for supplying a DC voltage to the substrate supporting units the DC voltage being a DC voltage for chucking the substrate during treating the substrate; and
an RF power supplying unit for supplying an RF power to the plasma generating unit the RF power being a process RF power for treating the substrate,
wherein the RF power supplying unit,
supplies a second discharging RF power smaller than the process RF power to the plasma generating unit during a second discharging time period,
supplies 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
supplies 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,
wherein the DC voltage supplying unit supplies a first discharging DC voltage smaller than the DC voltage to the substrate supporting unit during the first discharging time period and supplies a second discharging DC voltage smaller than the first discharging DC voltage to the substrate supporting unit during the second and third discharging time periods.