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

Claim 22:
23. A method of manufacturing a semiconductor device, 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 a substrate by supplying a first process gas to the substrate, wherein the first film contains silicon, carbon, and nitrogen and the first process gas does not include oxidizing gas; and
(b) forming a second film having a second thickness on the first film by supplying a second process gas to the substrate, wherein the second film contains silicon, oxygen, and nitrogen and the second process gas includes oxidizing gas,
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.