Patent ID: 7972973

Claim:
A method for forming a silicon oxide film with a plasma processing apparatus comprising: a process chamber; a microwave transmissive plate; a planar antenna plate provided on the microwave transmissive plate for introducing microwaves into a region for generating plasma within the processing chamber; a gas introducing member for introducing a processing gas into the processing chamber; and a member having a plurality of through-holes provided below the planar antenna plate and between the region for generating the plasma in the processing chamber and the object to be processed, said method comprising the steps of: placing an object formed of silicon and having a concavo-convex pattern on a surface thereof, in the processing chamber; and forming a silicon oxide film by generating plasma of a processing gas with the microwave transmissive plate, the planar antenna plate, and the gas introducing member so as to oxidize the silicon on the surface of the object to be processed, and by applying the plasma of the processing gas to the surface, wherein the step of forming the silicon oxide film comprises generating the plasma under the condition that a ratio of oxygen in the processing gas is within a range of 0.1% to 10% and pressure is within a range of 0.133 Pa to 133.3 Pa, so as to oxidize the silicon, and introducing the generated plasma toward the object to be processed, via the plurality of through-holes formed in the member between the region and the object, thereby forming the silicon oxide film.