Patent ID: 9055661
Filing Date: 2015-06-09
Classification: C23C,H01J,H05H

Abstract:
1. A plasma processing apparatus that excites a processing gas into plasma by applying a high frequency power between an upper electrode and a lower electrode provided within a processing chamber and performs a plasma process on a target object with the plasma, the plasma processing apparatus comprising: a grounding member provided above the upper electrode via an insulating member; and a DC power supply configured to apply a negative DC voltage to the upper electrode, wherein a gas diffusion room communicating with a gas supply opening formed at a lower surface of the upper-electrode is formed in the upper electrode, a gas flow path communicating with the gas diffusion room is formed in the insulating member, and a bent portion configured to allow a gas flowing through the gas flow path to flow in a direction having at least a horizontal component is formed at the gas flow path such that one end portion of the gas flow path cannot be seen from the other end portion of the gas flow path when viewed from the top.