Patent ID: 8821684

Claim:
A substrate plasma processing apparatus, comprising: a chamber capable of maintaining a vacuum therein; a first electrode to hold a substrate in the chamber, the substrate being processed on a main surface thereof; a counter electrode arranged to face the first electrode in the chamber; a first supply unit configured to apply a high frequency power having a predetermined frequency of 50 MHz or higher to the first electrode; a second supply unit configured to apply a predetermined DC negative pulse voltage in a manner of superimposing on the high frequency power to the first electrode; a control unit configured to periodically turn on and off both of the first and second supply units so as to repeat in sequence a first period, a second period, and a third period, in the first period both of the high frequency power and the DC negative pulse voltage being applied to the first electrode, in the second period only the high frequency power being applied to the first electrode, and in the third period none of the high frequency power and the DC negative pulse voltage being applied to the first electrode.