Patent ID: 8568606
Filing Date: 2013-10-29
Classification: H01J

Abstract:
1. A substrate processing method using a substrate processing apparatus including a chamber for accommodating a substrate, a lower electrode disposed in the chamber to mount the substrate, a first RF power applying unit for applying an RF power for plasma generation to the lower electrode, and a second RF power applying unit for applying an RF power for bias to the lower electrode, the method comprising: controlling the first RF power applying unit for plasma generation to be intermittently changed by changing an output of the first RF power applying unit at a predetermined timing; controlling the second RF power applying unit to apply RF power for bias to the lower electrode during application of power by the first RF power applying unit to generate a plasma such that, during a first period in which the first RF power applying unit is applying power to generate a plasma, the second RF power applying unit is continuously applying power throughout the first period or is applying power with a plurality of pulses throughout the first period; and the method further including controlling the second RF power applying unit such that during a second period if no plasma state or an afterglow state exists in the chamber by a control of the first RF power applying unit, an output of the second RF power applying unit is controlled to be in an OFF state or decreased below an output of the second RF power applying unit when the output of the first RF power applying unit is a set output.