Patent ID: 11967499
Assignee: KOKUSAI ELECTRIC CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 21:
22. A substrate processing apparatus, comprising:
a process chamber in which a substrate is processed;
a first process gas supply system configured to supply a first process gas, which does not include oxidizing gas, to the substrate in the process chamber;
a second process gas supply system configured to supply a second process gas, which includes oxidizing gas, to the substrate in the process chamber; and
a controller configured to be capable of controlling the first process gas supply system and the second process gas supply system to perform a process comprising:
(a) forming a first film having a first thickness and a carbon concentration of 30% or higher on an underlayer which is formed on a surface of the substrate by supplying the first process gas to the substrate, wherein the first film contains silicon, carbon, and nitrogen; and
(b) forming a second film having a second thickness on the first film by supplying the second process gas to the substrate, wherein the second film contains silicon, oxygen, and nitrogen,

wherein in (b), oxygen atoms, which are derived from the oxidizing gas and diffuse from a surface of the first film toward the underlayer, are absorbed by the first film and the first film is modified.