Patent ID: 7692916
Filing Date: 2010-04-06
Classification: H01J

Abstract:
1. A plasma etching apparatus comprising: a process container configured to accommodate a target substrate and to be vacuum-exhausted; a first electrode and a second electrode disposed opposite each other within the process container, the first electrode being an upper electrode and the second electrode being a lower electrode configured to place the target substrate thereon; a process gas supply unit configured to supply a process gas into the process container; an RF power supply configured to apply an RF power to the first electrode or second electrode to generate plasma of the process gas; a DC power supply configured to apply a DC voltage to the first electrode; and a control section configured to control the RF power supply and the DC power supply, wherein the control section is preset to perform control such that the DC power supply causes the DC voltage applied therefrom to reach a voltage set value, when or after the RF power supply starts applying the RF power, to perform a predetermined plasma etching process on the target substrate, and the DC power supply starts decreasing the DC voltage applied therefrom from the voltage set value, when or before the RF power supply stops applying the RF power, to end the predetermined plasma etching process.