Patent ID: 8896210

Claim:
A plasma processing apparatus for generating a plasma of a gas and performing a plasma processing on a target object to be processed by an action of the plasma, comprising: a depressurizable processing chamber; a lower electrode, provided in the processing chamber, serving as a mounting table for mounting thereon the target object; a facing electrode, serving as an upper electrode or an antenna electrode provided at the processing chamber so as to be opposite to the lower electrode; a gas supply source for introducing a gas including a halogen-containing gas and an oxygen gas into the processing chamber; and a plasma generation unit for generating a plasma of the gas including the halogen-containing gas and the oxygen gas in the processing chamber, wherein, among inner surfaces of the processing chamber which are exposed to the plasma of the gas including the halogen-containing gas and the oxygen gas, at least a part of or all of the surfaces between a mounting position of the target object and the facing electrode; or at least a part of or all of the surfaces of the facing electrode are coated with a fluorinated compound, wherein the fluorinated compound contains YF 3 , and wherein an outermost layer of the fluorinated compound is transformed into a transformed layer containing Y, O and F or containing Y, O, F and at least one of Cl and Br by the plasma of the gas including the halogen-containing gas and the oxygen gas.