Patent ID: 11972929
Assignee: TOKYO ELECTRON LIMITED
Field: Surface technology, coating (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A film forming method for forming a film with a plasma, the film forming method comprising:
a precoating process of coating a surface of a ceramic sprayed coating with a first carbon film with a plasma of a first carbon-containing gas at a first pressure in a state where a substrate is not carried into a processing container having the ceramic sprayed coating on at least one of an inner wall of a top wall on which an antenna that radiates microwaves is arranged and a side wall of the processing container, the top wall extending along a first direction and the side wall extending along a second direction that is different from the first direction;
a mounting process of mounting the substrate on a mounting table in the processing container, the mounting table extending along the first direction; and
a film forming process of forming a second carbon film on the substrate with a plasma of a second carbon-containing gas at a second pressure,
wherein the first pressure during the precoating process is higher than the second pressure during the film forming process, and wherein at the first pressure the plasma of the first carbon-containing gas narrows toward the top wall of the processing container and at the second pressure the plasma of the second carbon-containing gas spreads towards the mounting table, and wherein a microwave transmission plate is arranged on a lower surface side of the antenna and is fitted in an opening in the top wall such that a lower surface of the microwave transmission plate is planar with a lower surface of the top wall.