Patent ID: 11862441
Assignee: TOKYO ELECTRON LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A plasma processing method comprising:
providing a plasma processing apparatus, the plasma processing apparatus including a chamber having a substrate provided therein, the substrate having a recess;
generating plasma in the chamber thereby forming a film on the recess, the film being formed on an upper side of a side wall of the recess and on a top surface outside of the recess adjacent the recess, and not being formed on a lower side of the side wall and a bottom of the recess;
monitoring a state of the plasma generated in the generating using a first sensor;
detecting a pattern shape on the substrate using a second sensor;
determining a necessity of re-execution of the generating of the plasma;
detecting, using the second sensor, a pattern shape of the substrate on which the film is formed when the generating of the plasma is not to be re-executed;
etching a base layer using a layer having the film formed thereon as a mask;
wherein the generating of the plasma includes:
introducing a first gas into the chamber and causing the first gas to be adsorbed on only a part of the recess, and
introducing a second gas into the chamber and reacting a component of the second gas with a component of the first gas adsorbed on the recess, thereby forming the film, and

wherein:
the generating of the plasma is stopped before a reaction between the component of the first gas and the component of the second gas is saturated over an entire surface of the recess, and
the film is formed on the side wall such that a thickness of the film gradually decreases from the upper side of the side wall toward a bottom of the recess.