| 摘要 |
A silicon oxide film with a film thickness of 5 to 7 nm is formed on a first region, a silicon oxynitride film with a film thickness of 2 to 3 nm, and a nitrogen concentration of 1 to 3 atom % is formed on a second region, and a silicon oxynitride film with a film thickness of 1 to 2 nm, and a nitrogen concentration of 3 to 5 atom % is formed on a third region on a silicon substrate. Then, radical nitriding is applied to the silicon oxide film, and the silicon oxynitride films.
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