Patent ID: 7846291

Claim:
A plasma processing apparatus, which processes a semiconductor substrate or a substrate of a liquid crystal display, the plasma processing apparatus comprising: a process container configured to accommodate a target substrate; a support member configured to support the target substrate inside the process container; a gas supply mechanism configured to supply a process gas into the process container; an exhaust mechanism configured to exhaust gas from inside the process container; and a plasma generation mechanism configured to generate plasma from the process gas inside the process container, wherein a predetermined portion of the process container to be exposed to the plasma is covered with a protection film for protecting the predetermined portion from the plasma, and the protection film is a thermal sprayed film of Al 2 O 3 and Y 2 O 3 , with a weight ratio of Al 2 O 3 relative to Y 2 O 3 being 0.5 to 4 and is a surface-polished film having a thickness of larger than 50 μm.