Patent ID: 8383001
Filing Date: 2013-02-26
Classification: H01J

Abstract:
1. A plasma etching method for forming a hole in an etching target film by using a plasma etching apparatus including an evacuable processing chamber configured to accommodate a processing target object therein; a lower electrode provided within the processing chamber and serving as a mounting table for the processing target object; an upper electrode provided within the processing chamber and facing the lower electrode; a processing gas supply unit configured to supply a processing gas into the processing chamber; a plasma generation power unit configured to apply a plasma generation power to at least one of the upper electrode and the lower electrode; and a first DC power supply configured to apply a negative DC voltage to the upper electrode, the method comprising: turning on the plasma generation power unit while applying a first negative DC voltage from the first DC power supply; and turning off the plasma generation power unit while applying a second negative DC voltage from the first DC power supply, wherein an absolute value of the second negative DC voltage is greater than an absolute value of the first negative DC voltage.