Patent ID: 8642478

Claim:
A plasma processing method comprising: mounting a target substrate having thereon an oxide film and an organic film on a first electrode positioned within an evacuable processing chamber; generating plasma by exciting a processing gas within the processing chamber; applying to the first electrode a first high frequency power and a second high frequency power each having a different frequency in order to attract ions from the plasma toward the substrate; and etching the oxide film using the organic film as a mask to form a hole within the oxide film by the plasma, wherein when etching the oxide film, a minimum energy and a maximum energy of the ions incident onto the substrate are controlled independently of each other such that ion energy of the ions are concentrated at a first energy band and a second energy band respectively, the first energy band is lower than a first energy value at which the oxide film is etched while the organic film is not etched, and the second energy band is higher than a second energy value at which an etching yield at an inclined surface of the hole is higher than an etching yield of an upper surface of the organic film.